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HomeMy WebLinkAbout1.0 ApplicationURS Washington Division Chevron CHEVRON PICEANCE BASIN NATURAL GAS DEVELOPMENT PROGRAM EARLY PRODUCTION SYSTEM GARFIELD COUNTY SPECIAL USE PERMIT APPLICATION SERVICE PAD / BOOSTER COMPRESSOR STATION 25-4 Revision A April 22, 2008 Chevron North America Exploration and Production Company 744 Horizon Court Grand Junction, CO 81506 GARFIELD COUNTY Building & Planning Department 108 8th Street, Suite 401 Glenwood Springs, Colorado 81601 Telephone: 970.945.8212 Facsimile: 970.384.3470 www.garfield-county.com RECEIVED AN 2 4 2003 GArst- IELD COUNTY BUILDING & PLANNING Special Use Permit GENERAL INFORMATION (To be completed by the epplIcoRl.) Street Address / General Location of Property: Section 25. Township 5 South. Range 98 West. 6111 Principal Meridian (Latitude 39°35'20.0"N. Longitude l08°29'25,6"W NAD 83 / WGS 84) Legal Description: Portions of NEV4NW1/4 and SE'/4NW'/4 of S36, T5S, R98W, 6th Principal Meridian. County of Garfield, State of Colorado - detailed description provided with plat drawing Existing Use & Size of Property in acres: Grazing / Agricultural 5.0 of ==54,000 acres Description of Special Use Requested: Set -vice Pad / Booster Compressor Station to support natural gas production operations at Chevron North American Exploration and Production Company's Piceance Basin Natural Gas Development Program north of De Beque. Colorado �► Zone District: Resource Lands Name of Property Owner (Applicant): Chevron U.S.A. Inc. Address: C/o Chevron Texaco Property Tax. P.O. Box 285 Telephone: City: Houston State: TX Zip Code: 77001 FAX: Name of Owner's Representative, if any (Attorney. Planner, etc): Sally C'uffin, URS - Washington Division Address: 7800 E. Union Avenue, Suite 100 Telephone: (303) 843-2219 City: Denver State: CO Zip Code: 80237 FAX:(303) 843-3622 1I11�} STAFF USE ONLY V r Doc. No.: 1- S46°7 Date Submitted:L • O$ TC Date: Planner: Hearing Date: APPLICATION SUBMITTAL REQUIREMENTS As a minimum, specifically respond to all the following items below and attach any additional information to be submitted with this application: 1. Please submit, in narrative form, the nature and character of the Special Use requested. Submit plans and supporting information (i.e. letters from responsible agencies). Include specifications for the proposed use including, but not limited to, the hours of operation, the number and type of vehicles accessing the site on a daily, weekly and/or monthly basis, and the size and location of any existing and/or proposed structures that will be used in conjunction with the proposed use, and provisions for electric power service and any other proposed utility improvements. Be specific. 2. If you will be using water or will be treating wastewater in conjunction with the proposed use, please detail the amount of water that would be used and the type of wastewater treatment. If you will be utilizing well water, please attach a copy of the appropriate well permit and any other legal water supply information, including a water allotment contract or an approved water augmentation plan to demonstrate that you have legal and adequate water for the proposed use. 3. Submit a site plan /map drawn to scale that portrays the boundaries of the subject property, all existing and proposed structures on the property, and the County or State roadways within one (1) mile of your property. If you are proposing a new or expanded access onto a County or State roadway, submit a driveway or highway access permit. 4. Submit a vicinity map showing slope / topography of your property, for which a U.S.G.S.1:24,000 scale quadrangle map will suffice. 5. Submit a copy of the appropriate portion of a Garfield County Assessor's Map showing all the subject property and public and private landowners adjacent to your property (which should be delineated). In addition, submit a list of all property owners, public and private landowners and their addresses adjacent to or within 200 ft. of the site. This information can be obtained from the Assessor's Office. We will also need the names (if applicable) of all inineral right owners of the subject property. (That information can be found in your title policy under Exceptions to Title). 6. Submit a copy of the deed and a legal description of the subject property. 7. If you are acting as an agent for the property owner, you must attach an acknowledgement from the property owner that you may act in his/her behalf. 8. Submit an statement that specifically responds to each of the following criteria from Section 5.03 of the Zoning Regulations: (I) Utilities adequate to provide water and sanitation service based on accepted engineering standards and approved by the Board of County Commissioners shall either be in place or shall be constructed in conjunction with the proposed use. (2) Street improvements adequate to accommodate traffic volume generated by the proposed use and to provide safe, convenient access to the use shall either be in place or shall be constructed in conjunction with the proposed use; (3) Design of the proposed use is organized to minimize impact on and from adjacent uses of land through installation of screen fences or landscape materials on the periphery of the lot and by location of intensively utilized areas, access points, lighting and signs in such a manner as to protect established neighborhood character; 9. Depending on the type of Special UUP rmit requested, you may heed to tesp'otid to additional review standards in.tlfe tra41 County Zoning Resolution §eotion 5.00 [Supplementary Regulations]. This may include uses such industrial uses [section 5.03.07 & 5.03.08], Accessory Dwelling Units [section 5.03.21], Utility line/Utility Substations, etc. Specific sections of the Zoning Resolution which can be located on the Garfield County web site at http://www,garfield-county,cont/building_and_planuing/index.htm, or information can be obtained from this office 10. A $400.00 Base Fee: Applicant shall sign the "Agreement for Payment" form and provide the fee with the application. 11. Submit 2 copies of this completed application form and all the required submittal materials to the Building and Planning Department. Staff will request additional copies once the Special Use Permit application has been deemed technically complete. ll. PROCEDURAL REQUIREMENTS (The following steps outline how the Special Use Permit Application review process works in Garfield County.) I. Submit this completed application form, base fee, and all supplemental information to the Garfield County Planning Department. It will be received and given to a Staff Planner who will review the application for technical completeness. 2. Once the application is deemed technically complete, the Staff Planner will send you a letter indicating the application is complete. In addition, Staff will also send you a "Public Notice Form(s)" indicating the time and date of your hearing before the Board of County Commissioners. Prior to the public hearing, Staff will provide you with a Staff Memorandum regarding your requested Special Use. (If Staff determines you application to be deficient, a letter will be sent to you indicating that additional information is needed to deem your application complete.) 3. It is solely the Applicant's responsibility to ensure proper noticing occurs regarding the requested Special Use and the public hearing. If proper notice has not occurred, the public hearing will not occur. Notice requirements are as follows: a. Notice by publication, including the name of the applicant, description of the subject lot, a description of the proposed special use and nature of the hearing, and the date, time and place for the hearing shall be given once in a newspaper of general circulation in that portion of the County in which the subject property is located at least thirty (30) but not more than sixty (60) days prior to the date of such hearing, and proof of publication shall be presented at hearing by the applicant. b. Notice by mail, containing information as described in the paragraph above, shall be mailed to all owners of record as shown in the County Assessor's Office of lots within two hundred feet (200') of the subject lot and to all owners of mineral interest in the subject property at least thirty (30) but not more than sixty (60) days prior to such hearing time by certified return receipt mail, and receipts shall be presented at the hearing by the applicant. c. The site shall be posted such that the notice is clearly and conspicuously visible from a public right-of-way, with notice signs provided by the Planning Department. The posting must take place at least thirty (30) but not more than sixty (60) days prior to the hearing date and is the sole responsibility of the applicant to post the notice, and ensure that it remains posted until and during the date of the hearing. 4. The Applicant is required to appear before the Board of County Commissioners at the time and date of the public hearing at which time the Board will consider the request. In addition, the Applicant shall provide proof, at the hearing, that proper notice was provided. 5. Once the Board makes a decision regarding the Special Use request, Staff will provide the Applicant with a signed resolution memorializing the action taken by the Board. Following the Board's approval, this office will issue the Speo al Use Permit to the applicant. if the Board's approval includes specific conditions ofapproval to be inet, this office will not issue the Official Special Use Permit certificate until the applicant has satisfied all conditions of approval. The Special Use Permit approval is not finalized until this office has issued the Official Special Use Permit certificate signed by the Chairman of the Board of County Commissioners. I have read the statements above and have provided the required attached information which is correct and accurate to the best of my knowledge. 'CAVO {Signature f iplicant/owner} Last Revised: 021200E Chevron URS washinglon Division CHEVRON PICEANCE BASIN NATURAL GAS DEVELOPMENT PROGRAM SERVICE PAD I BOOSTER COMPRESSOR STATION 25-4 GARFIELD COUNTY SPECIAL USE PERMIT APPLICATION INDUSTRIAL SUPPORT FACILITY A Issued for County Submittal SMC 04/21/08 REV. DESCRIPTION BY CHKD APVD EM RVWD DATE REVISIONS CLIENT: Chevron North America Exploration and Production Company PROJECT: Piceance Basin Natural Gas Development Program — Early Production System PROJECT NO.: 29454 — Under Chevron Contract Number 0537211 DOC. NO.: PBSR-59825BVF-RGL-PMT-URS-00000-00001 GARFIELD COUNTY Building & Planning Department 108 8th Street, Suite 401 Glenwood Springs, Colorado 81601 Telephone: 970.945.8212 Facsimile: 970.384.3470 www.garfield-county.com Special Use Permit GENERAL INFORMATION #To be completed by the applicant.) Street Address / General Location of Property: Section 25, Township 5 South, Range 98 West, 6th Principal Meridian (Latitude 39°35'20.0"N. Longitude 108°29'25.6"W NAD 83 / WGS 84) • Legal Description: Portions ofNE'/4NW'/,rand SE'/4NWV/4 of S36, T5S, R98W, 6th Principal Meridian, County of Garfield, State of Colorado - detailed description provided with plat drawing • Existing Use & Size of Property in acres: Grazing / Agricultural 5.0 of =54,000 acres Description of Special Use Requested: Service Pad / Booster Compressor Station to support natural gas production operations at Chevron North American Exploration and Production Company's Piceance Basin Natural Gas Development Program north of De Benue, Colorado Zone District: Resource Lands • Name of Property Owner (Applicant): Chevron U.S.A. Inc. • Address: C/O Chevron Texaco Property Tax, P.O. Box 285 Telephone: • City: Houston State: TX Zip Code: 77001 FAX: Name of Owner's Representative, if any (Attorney, Planner, etc): Sally Cuffin, URS - Washington Division Address: 7800 E. Union Avenue, Suite 100 Telephone: (303) 843-2219 • City: Denver State: CO Zip Code: 80237 FAX:(303) 843-3622 STAFF USE ONLY • Doc. No.: Date Submitted: TC Date: Planner: Hearing Date: APPLICATION SUBMITTAL REQUIREMENTS As a minimum, specifically respond to all the following items below and attach any additional information to be submitted with this application: 1. Please submit, in narrative form, the nature and character of the Special Use requested. Submit plans and supporting information (i.e. letters from responsible agencies). Include specifications for the proposed use including, but not limited to, the hours of operation, the number and type of vehicles accessing the site on a daily, weekly and/or monthly basis, and the size and location of any existing and/or proposed structures that will be used in conjunction with the proposed use, and provisions for electric power service and any other proposed utility improvements. Be specific. 2. If you will be using water or will be treating wastewater in conjunction with the proposed use, please detail the amount of water that would be used and the type of wastewater treatment. If you will be utilizing well water, please attach a copy of the appropriate well permit and any other legal water supply information, including a water allotment contract or an approved water augmentation plan to demonstrate that you have legal and adequate water for the proposed use. 3. Submit a site plan /map drawn to scale that portrays the boundaries of the subject property, all existing and proposed structures on the property, and the County or State roadways within one (1) mile of your property. If you are proposing a new or expanded access onto a County or State roadway, submit a driveway or highway access permit. 4. Submit a vicinity map showing slope / topography of your property, for which a U.S.G.S.1:24,000 scale quadrangle map will suffice. 5. Submit a copy of the appropriate portion of a Garfield County Assessor's Map showing all the subject property and public and private landowners adjacent to your property (which should be delineated). In addition, submit a list of all property owners, public and private landowners and their addresses adjacent to or within 200 ft. of the site. This information can be obtained from the Assessor's Office. We will also need the names (if applicable) of all mineral right owners of the subject property. (That information can be found in your title policy under Exceptions to Title). 6. Submit a copy of the deed and a legal description of the subject property. 7. If you are acting as an agent for the property owner, you must attach an acknowledgement from the property owner that you may act in his/her behalf. 8. Submit an statement that specifically responds to each of the following criteria from Section 5.03 of the Zoning Regulations: (1) Utilities adequate to provide water and sanitation service based on accepted engineering standards and approved by the Board of County Commissioners shall either be in place or shall be constructed in conjunction with the proposed use. (2) Street improvements adequate to accommodate traffic volume generated by the proposed use and to provide safe, convenient access to the use shall either be in place or shall be constructed in conjunction with the proposed use; (3) Design of the proposed use is organized to minimize impact on and from adjacent uses of land through installation of screen fences or landscape materials on the periphery of the lot and by location of intensively utilized areas, access points, lighting and signs in such a manner as to protect established neighborhood character; 9. Depending on the type of Special Use Permit requested, you may need to respond to additional review standards in the Garfield County Zoning Resolution Section 5.00 [Supplementary Regulations]. This may include uses such industrial uses [section 5.03.07 & 5.03.08], Accessory Dwelling Units [section 5.03.21], Utility line/Utility Substations, etc. Specific sections of the Zoning Resolution which can be located on the Garfield County web site at http:llwww.garfield-county.comlbuilding and planninglindex.htm, or information can be obtained from this office 10. A $400.00 Base Fee: Applicant shall sign the "Agreement for Payment" form and provide the fee with the application. 11. Submit 2 copies of this completed application form and all the required submittal materials to the Building and Planning Department. Staff will request additional copies once the Special Use Permit application has been deemed technically complete. II. PROCEDURAL REQUIREMENTS (The following steps outline how the Special Use Permit Application review process works in Garfield County.) 1. Submit this completed application form, base fee, and all supplemental information to the Garfield County Planning Department. It will be received and given to a Staff Planner who will review the application for technical completeness. 2. Once the application is deemed technically complete, the Staff Planner will send you a letter indicating the application is complete. In addition, Staff will also send you a "Public Notice Form(s)" indicating the time and date of your hearing before the Board of County Commissioners. Prior to the public hearing, Staff will provide you with a Staff Memorandum regarding your requested Special Use. (If Staff determines you application to be deficient, a letter will be sent to you indicating that additional information isneeded to deem your application complete.) 3. It is solely the Applicant's responsibility to ensure proper noticing occurs regarding the requested Special Use and the public hearing. If proper notice has not occurred, the public hearing will not occur. Notice requirements are as follows: a. Notice by publication, including the name of the applicant, description of the subject lot, a description of the proposed special use and nature of the hearing, and the date, time and place for the hearing shall be given once in a newspaper of general circulation in that portion of the County in which the subject property is located at least thirty (30) but not more than sixty (60) days prior to the date of such hearing, and proof of publication shall be presented at hearing by the applicant. b. Notice by mail, containing information as described in the paragraph above, shall be mailed to all owners of record as shown in the County Assessor's Office of lots within two hundred feet (200') of the subject lot and to all owners of mineral interest in the subject property at least thirty (30) but not more than sixty (60) days prior to such hearing time by certified return receipt mail, and receipts shall be presented at the hearing by the applicant. c. The site shall be posted such that the notice is clearly and conspicuously visible from a public right-of-way, with notice signs provided by the Planning Department. The posting must take place at least thirty (30) but not more than sixty (60) days prior to the hearing date and is the sole responsibility of the applicant to post the notice, and ensure that it remains posted until and during the date of the hearing. 4. The Applicant is required to appear before the Board of County Commissioners at the time and date of the public hearing at which time the Board will consider the request. In addition, the Applicant shall provide proof, at the hearing, that proper notice was provided. S. Once the Board makes a decision regarding the Special Use request, Staff will provide the Applicant with a signed resolution memorializing the action taken by the Board. Following the Board's approval, this office will issue the Special Use Permit to the applicant. If the Board's approval includes specific conditions of approval to be met, this office will not issue the Official Special Use Permit certificate until the applicant has satisfied all conditions of approval. The Special Use Permit approval is not finalized until this office has issued the Official Special Use Permit certificate signed by the Chairman of the Board of County Commissioners. I have read the statements above and have provided the required attached information which is correct and accurate to the best of my knowledge. (Signature of applicant/owner) Last Revised: 02/2006 Street Address / General Location of Property: Section 25, Township 5 South, Range 98 West, 6th Principal Meridian. A general coordinate for the facility is 39°35' 19.46"N latitude, 108°20'25.68"W longitude NAD 83 / WGS 84. Legal Description: A parcel of land situate in the NE1A NW' and SE'/4 NW'/n of Section 25, Township 5 South, Range 98 West of the 6th Principal Meridian, County of Garfield, State of Colorado, the perimeter being more particularly described for area as follows; Commencing at a 1924 General Land Office (GLO) brass cap in place for the North'A corner common with Sections 52 & 24; whence a found 1923 GLO brass cap in place for the section corner of Sections 24, 25, 19 and 30 bears S89°54'57"E a distance of 2631.66 feet, with all bearings contained herein being relative thereto; thence S24°48' 10"W a distance of 937.44 feet to the true point of beginning of the parcel described herein; thence S52°31'05"E a distance of 364.85 feet; thence S34°5l'56"W a distance of 313.89 feet to the centerline of an existing dirt road; thence S69°12'32"W a distance of 261.86 feet to the centerline of an existing dirt road; thence N51 °14'51"W a distance of 223.17 feet to the centerline of an existing dirt road; thence along the centerline of said dirt road N05°31'27"W a distance of 208.78 feet; thence leaving centerline of said dirt road N55°37' 14"E a distance of 398,47 feet to the point of beginning, containing 4.97 acres more or less (about 2.0 acres to contain new disturbance). Existing Use & Size of Property in acres: The footprint of the Service Pad / Booster Compressor Station 25-4 area is about 2.7 acres, which was previously disturbed during the installation of Skinner Ridge Well 598-25-4. About 1.4 additional acres will be disturbed to provide an area for two booster compressors that will service gas production from Well Pads 598 -25 -AV and 598 -25 -BV. The facilities are is located in the NE' NW'A and SE'% NW'A of Section 25, which is part of a in Tracts 103 and 104 of a 17013.05 acre parcel (No. 213715300009), which is currently zoned as grazing / agricultural land (Ref: Garfield County Account Number - R290521; Parcel Number — 2137-153-000-09). This parcel is part of a larger contiguous parcel of about 54,000 acres. Zone District: Resource Lands Name of Property Owner (Applicant): Chevron U.S.A. Inc. Atten; Ken Jackson 11111 South Wilcrest Drive Houston, TX 77099 Phone (281) 561-4991 FAX (281) 561-3702 Name of Owner's Representative, if any (Attorney, Planner, etc.) Sally Cuffin, URS -Washington Division, Denver, Colorado Garfield County Special Use Permit Application Service Pad / Booster Compressor Station 25-4 Chevron Piceance Basin Natural Gas Development Program Chevron North America Exploration and Production Company 744 Horizon Court Grand Junction, CO 81506 Revision A Prepared by URS Washington Division 7800 East Union Avenue Suite 100 Denver, Colorado 80237 Table of Contents 1 Nature and Character of Special Use Permit 1 1.1 Location 1 1.2 Service Pad / Booster Compressor Station 25-4 Purpose 2 1.3 Equipment List 2 1.4 Hours of Operation 3 1.5 Vehicles / Traffic / Regulatory Requirements 3 1.6 Civil Specifications / Regulatory Requirements 4 1.7 Major Equipment Descriptions / Regulatory Requirements 5 1.7.1 Booster Compressors / Generators 5 1.7.2 Fracing Equipment 5 1.8 Structural Specifications / Regulatory Requirements 6 1.9 Electrical Utilities / Regulatory Requirements 6 1.10 Floodplain 6 1.11 Noxious Weeds 6 1.12 Safety / Security / Emergency Response 7 2 Water Supply / Wastewater Management Systems 8 3 Site Plan / Property Map 8 4 Topographic Vicinity Map 8 5 Assessor's Map / Adjacent Landowners 9 6 Property Deed 9 7 Authorization Letter 9 8 Water & Wastewater Management / Street Improvements / Project Visual Effects 9 8. Water and Sanitation Service 9 8.1.1 Sanitation Services 10 8.2 Road Improvements / Issues 10 8.3 Visual Effects 10 8.4 Reclamation and Re -vegetation Plan 10 9 Use Specific Standards 11 9.1 Supplemental Industrial Operations Requirements 11 9.2 Supplemental Industrial Performance Standards 12 9.3 Supplemental Regulation for Accessory Dwelling Units 12 9.4 Chevron Specific Requirements 12 9.5 General Supplemental Information — Biological Survey / Cultural Resources 12 9.6 Documentation 12 Attachments Maps Drawings Hyland Contract Storm Water Management Plan (SWMP) Construction Storm Water Permit Erosion Control Drawings Compressor Specification Air Permits Noise Assessment Study Typical Frac Tank Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company i Piceance Basin Natural Gas Development Program Integrated Vegetation and Noxious Weed Management Plan Biological Survey Emergency Response Plan Safety Plans Driveway Permit Email Plat Assessor Map Adjacent Property Owners - Assessor Maps Adjacent Property Owners - List Deed Authorization Letter 45 Road Bridge Cultural Resources Inventory Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company ii Piceance Basin Natural Gas Development Program Introduction As part of their Piceance Basin Natural Gas Development Program (Program), Chevron North America Exploration and Production Company (Chevron) proposes the construction of a Service Pad / Booster Compressor Station. The proposed facility will make use of an existing well pad (Skinner Ridge 598-25-4) for centralized staging area for hydraulic fracturing equipment and supplies. Available space on that pad also will be used as an in -field fabrication area and for general storage. In addition to the proposed activities on the existing well pad, a small adjacent pad is proposed for the placement of two booster compressors needed transfer natural gas from two adjacent well pads currently under construction. The proposed site activities are necessary to support drilling and gas production operations in the Tom Creek area of Chevron's Skinner Ridge Natural Gas Field. The Program is located on a Chevron owned parcel of about 54,000 contiguous acres north of De Beque, Colorado (see Maps — Figure 1). Well pads and preliminary facilities associated with the Early Production System (EPS) phase of the Program are currently operational or under construction. The EPS includes the development of four well pads, two service pads, the Central Production Facility (CPF), and the associated support facilities (see Maps - Figure 2). Service Pad / Booster Compressor Station 25-4 is an integral part of the facilities needed to support the EPS, 1 Nature and Character of Special Use Permit Please submit, in narrative form, the nature and character of the Special Use requested. Submit plans and supporting information (i.e. letters from responsible agencies). Include specifications for the proposed use including. but not limited to, the hours of operation, the number and type of vehicles accessing the site on a daily, weekly and/or monthly basis. and the size and location of any existing and/or proposed structures that will be used in conjunction with the proposed use, and provisions for electric power service and any other proposed utility improvements. Be specific. As part of the EPS development Chevron proposes the installation and operation of Service Pad / Booster Compressor Station 25-4 (SP/BCS 25-4). The facility will be located in the NE1/4 NW'A and SEt/a NW1/4 of Section 25, Township 5 South, Range 98 West of the 6th Principal Meridian (see Maps - Figure 2). 1.1 Location The proposed facility will be located about 1.4 miles north northwest of an existing intersection of two ranch roads near the confluence of Clear Creek and Tom Creek (see Maps - Figure 2). The intersection is located about 2.5 miles north northwest of the end of County Road (CR) 211. The site can be accessed from Interstate 70, exit 62, by traveling north on local Road 45N (currently bridge reconstruction detours traffic to the frontage road to W.5 road and back to 45N). Road 45N north of De Beque, Colorado, is also known as Roan Creek Road/Drive and CR 204 (Garfield County). The intersection of CR 211 and CR 204 is located about 12.5 miles north northwest of De Beque and this facility can be accessed by continuing north on CR 211. SP/BCS 25-4 would occupy about 3.8 acres of a survey defined 5.0 acre parcel. A general coordinate for the facility is 39°35' 19.46"N latitude, 108°20'25.68"W longitude NAD 83 / WGS 84. Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company 1 Piceance Basin Natural Gas Development Program 1.2 Service Pad / Booster Compressor Station 25-4 Purpose SP/BCS 25-4 will be used for multiple purposes to support the natural gas field operations. Separation and control equipment from the existing well pad (Skinner Ridge 598-25-4) has been moved to an adjacent well pad to accommodate the placement of hydraulic fracturing equipment. Remaining space on the existing pad will be used for miscellaneous storage and in field fabrication operations (e.g., welding, cutting, assembly). A smaller secondary pad is proposed for the placement of two booster compressors needed to maintain appropriate pipeline pressures for natural gas delivery to the Central Production Facility (see Figure 3 and Drawing PBSR-59825-DVW-RGL-PLT-URS-00000-00001). Skinner Ridge well pads 598 -25 -AV and 598 -25 -BV will be serviced by these booster compressors (each well pad has up to 22 directionally drilled wells). The CPF removes the remaining water and condensate (a blend of low-density hydrocarbons), which is not removed by the on pad separation equipment, prior to gas transfer into the Program 30 -inch sales pipeline. Condensate removal is necessary to prevent pipeline multiphase flow problems and to collect the valuable commodity for sales (source of propane, butane, pentane and heavier hydrocarbon fraction). The water must be removed to prevent corrosion and hydrate formation in the pipelines and to prevent the multiphase flow problems. 1.3 Equipment List The current SP/BCS 25-4 equipment list for the booster compressor pad area includes the following: • 2 Compressor / Generator Skids (Caterpillar G3516 -LE) • Control Building (8 ft x 40 ft) • General Storage Area (8 ft x 40 ft) • Air System Skid • Pipe Rack, Piping, and Control Cables • System Vent Stack (20 feet height) In addition the following equipment will be placed on the existing well pad (Skinner Ridge 598- 25-4): • Up to 50 hydraulic fracturing (frac) tanks - contain a combination of fresh, produced, and recycled water • Four material movers — used for sand storage and handling (300,000 to 400,000 pounds of sand per unit) • Blender — mixes water, sand, fracing polymer (Gel -Pro), and biocide • Conveyor belt -- moves sand to Blender • Four hydraulic horsepower pumps — pressurize frac fluids for well injection • Control van — controls and monitors frac operations • Three chemical storage buildings — storage of biocide (Biocyte) used to control growth of bacteria in water stored in frac tanks and fracing polymer (Gel -Pro) • Delivery pipeline to well pads • Fabrication equipment for miscellaneous in -field requirements All equipment will be designed / installed in accordance with current engineering standards [e.g., American Petroleum Institute (API), American Society of Mechanical Engineers (ASME), Doc. No... PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company 2 Piceance Basin Natural Gas Development Program American Society for Testing Materials (ASTM), American Welding Society (AWS), International Fire Code (IFC), National Electrical Code (NEC), National Electrical Manufacturers Association (NEMA), National Fire Protection Association (NFPA), etc.]. Buildings will meet the International Building Code (IBC) 2003 and National Electrical Code (NEC) 2005 requirements and all other relevant County codes. Eight- to ten -inch pipelines will transfer gas from the wells to the booster compressors and on to the CPF (information about these pipelines was provided in the CPF Special Use Permit application). 1.4 Hours of Operation The booster compressors will operate 24 -hours, 7 days a week, but will not be continuously manned. Personnel will visit the location as needed to perform tasks such as system checks and routine maintenance. The fracing Control Van and equipment will be manned 24 -hours, 7 days a week during fracing operations. Both areas will be used for miscellaneous storage and fabrication activities, which will be manned between several minutes to several hours as required. 1.5 Vehicles / Traffic / Regulatory Requirements A preliminary EPS traffic plan was previously provided in the EPS Plan of Development, which details estimates of traffic on area roads and highways. Periods of increased vehicle traffic are anticipated while facility construction is completed and prior to the implementation of mitigation measures. Initial traffic associated with the SP/BCS 25-4 construction will include the delivery and transfer of earthmoving equipment (e.g., graders, backhoes, loaders) and construction materials (e.g., concrete, gravel, storm -water controls) plus the associated workers. Additional deliveries / installations will be required for the compressor / generators, piping / valves, pipe racks, storage and control buildings, frac equipment (tanks, movers, blender, pumps, etc.) and frac supplies (water, sand, polymer, biocide). Vehicles required for the booster compressor pad construction will range from heavy duty pickup trucks to oversized vehicles for transporting equipment such as the compressor / generators. The majority of the traffic will be sized to meet posted weight restrictions but a number of heavy and wide loads will be required to place major equipment (e.g., compressor / generators). An estimated 30 vehicles will be required to deliver construction and site equipment with an additional 50 vehicles for construction materials with 20 vehicles for concrete delivery (dependent on compressor foundation design). The compressor pad construction is expected to take about two to four weeks (dependent on weather delays) requiring a workforce of between 30 and 50 employees. Efforts will be made to reduce workforce vehicle trips by the use of carpooling, vans, and / or buses. Operation of the booster compressors is dependent on the CPF becoming operational. Start up will involve bringing the compressor / generators on line and ensuring that all mechanical / electrical / control & instrumentation systems are operational and properly interface. These operations will be coordinated through the CPF startup workforce of about 30 employees. Fracing operations can begin after the placement of the tanks, mixers, blender, pumps, conveyor belts, storage and control buildings, and materials delivery. Fracing equipment is provided as mobile units that can be transported to the site and left until the completion of operations (about Doc. No.: PBSR-59525BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company 3 Piceance Basin Natural as Development Program 63 units). Between 10 and 20 additional units will be needed for delivery of piping, conveyor belts, and controls. Fifty to 100 truckloads of sand, polymer, and biocide will be needed for the fracing operations at each well pad. Fresh water will be the initial source for fracing, which initially will be trucked to the site either from off-site sources or the Fresh Water Pond. Pipelines are planned to reduce the number of water tankers, but if the pipelines are delayed it could take 2,500 to 3,000 truckloads to fill the tanks for each well pad fracing operation. Between 30 and 40 workers will be required during fracing operations, but their duties will be split between SP/BCS 25-4 and the well pad. Typical fracing operations take between 20 and 30 days, but this may need to be extended depending on water availability. Efforts will be made to reduce workforce vehicle trips by the use of carpooling, vans, and / or buses. When fracing operations are not taking place, a limited number of personnel will monitor the site. Additional traffic associated with SP/BCS 25-4 will include temporary storage of drilling equipment and supplies and in -field fabrication activities. The site also will be serviced for trash collection and bottled water made be periodically delivered. No restroom facilities will be provided at this location due to the proximity of the well pad facilities. All vehicles working within Garfield County Right of Ways will be licensed and registered in the State of Colorado. Vehicles hauling equipment and materials will abide by Garfield County Road and Bridge Departments oversize / overweight regulations. All oversize / overweight vehicles will obtain the necessary permits and carry a letter showing proof that they can operate under a known bond holder on file with Garfield and Mesa County Road and Bridge Departments. CNAEP has contracted with Hyland Enterprises, Inc. (see attached Hyland Contract) to supplement the County snow removal operations (scheduled hours 5 am to 5 pm) and provide general maintenance of the private access roads. Road closures are still possible during large snowfall events. 1.6 Civil Specifications / Regulatory Requirements Well pad 598-25-4 was originally graded for drilling operations under the requirements of the Colorado Oil and Gas Conservation Equipment (COGCC) that included a re -vegetation plan and bond. The waste pit at the site has since been filled / compacted to match the existing pad grade. Gravel was placed on the pad as part of the drilling operations but additional material may be required depending on usage. General site grading information is provided in Drawings PBSR-59825-INV-SRV-GEG-00001- 2899-03-BO1 and PBSR-59825-INV-SRV-GEG-00001-2899-03-B01 with grading sections in Drawing PBSR-59825-INV-SRV-GEG-00001-2899-05-B01 (see Drawings). Storm -water / erosion controls will be used in accordance with the best management controls specified by the site Storm Water Management Plan (SWMP) (see attached SWMP and associated Construction Storm Water Permit). An addendum to the SWMP for specific storm water controls for this site is provided in Drawings PBSR-59825-INF-DRN-GEG-00001-2899-06-B01, PBSR-59825-INF- DRN-GEG-00001-2899-07-B01, and PBSR-59825-INF-DRN-GEG-00001-2899-08-B01 (see Erosion Control Drawings). Bi -weekly SWMP inspections will be conducted to ensure site stabilization measures are adequate and / or identify areas that need repair / improvement. Any construction dewatering activities will be implemented in accordance with the provisions of the existing Construction Storm Water Permit with required information provided in the Site Specific Storm Water Plan. Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-0000l, Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company 4 Piceance Basin Natural Gas Development Program Available topsoil will be stockpiled and stabilized on the pad berms for the eventual site reclamation in accordance with specific SWMP requirements. Seed mixes used for site stabilization and revegetation will be in compliance with Garfield County Reclamation Standards. The berms / stockpiles will be monitored and controlled for noxious weeds throughout the operation of SP/BCS 25-4. General information concerning the area reclamation plan for the area is provided in Section 8.4. The SP/BCS 25-4 construction activities do not require a CDPHE Air Pollution Emission Notice (APEN) for fugitive dust because of the limited size of disturbance (<25 acres) and limited construction schedule (<6 months). 1.7 Major Equipment Descriptions / Regulatory Requirements The overall site layout is provided in Drawing PHSR-59825-DVW-RGL-PLT-URS-00000- 00001 (see Drawings). The following provides information about the major production processes. 1.7.1 Booster Compressors / Generators Two Caterpillar G3516 LE combination compressor / generators will be used to assist the transfer the natural gas from the wells to the CPF. Specifications for these units are provided as an attachment (see Compressor Specification). Two Construction Air Permits were approved by CDPHE on January 29, 2008, for the booster compressors. Minor permit application for air emissions from the CPF equipment was submitted to the CDPHE on May 1, 2007. Copies of the permit approval notifications are provided an attachment (see Air Permits). Booster compressors for the overall Program were evaluated as part of a preliminary noise assessment completed by Hoover & Keith Inc. (see Noise Assessment Study attachment). The assessment determined that the booster compressors will be in compliance the area noise regulations. 1.7.2 Fracing Equipment Up to fifty 500 barrel (21,000 gallons) portable tanks will used for hydraulic fracturing operations. These tanks can store fresh, produced, or recycled water or a combination of these sources. An illustration of a typical frac tank is provided as an attachment (see Typical Frac Tank). The water from these tanks is the carrier media for a combination of sand (proppant — holds open the hydraulically created fracture), polymer (allows more proppant to be held in solution), and a biocide (used to inhibit bacteria that degrade polymer and potentially block fractures) used for the fracturing operations. Sand (proppant) is stored and handled in four material movers, which can handle between 300,000 and 400,000 pounds of sand per unit. A conveyor belt system moves the sand to the blender where it is mixed with water, fracing polymer (Gel -Pro), and biocide (Biocyte). The mixture is transferred via temporary pipelines to the well using hydraulic horsepower pumps (up to four) that generate sufficient pressure to fracture the target formation. The fracing operation is controlled by a combination of personnel at the well pad and control van. Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4- Special Use Permit Chevron North American Exploration and Production Company 5 Piceance Basin Natural Gas Development Program The fracing operations are managed by a subcontractor that is required to maintain operation specific Spill Prevention, Control, and Countermeasure (SPCC) plans for each location. These plans are reviewed by Chevron for completeness and compliance. 1.8 Structural Specifications / Regulatory Requirements A 40 -ft x 8 -ft manufactured building is proposed house the booster compressor controls, electrical equipment, and general storage. The building will meet the 2003 International Building Code requirements and Garfield County specific requirements. Detailed drawings and specifications will be provided with the Garfield County building permit application. Multiple mobile processing units (tanks, mixers, blender, control unit, etc.) will be used for the fracing operations. These units are designed to for mobile operations. 1.9 Electrical Utilities / Regulatory Requirements Grand Valley Power is currently working to provide 5 MW of service to the facilities in Clear Creek valley, but initial operations will require the use of on-site power generation. Operational power will initially be provided the integral generators. The generator component may eventually be bypassed when a proposed Grand Valley Power line is routed to the site. Initial plans are to upgrade power to the Clear Creek basin to 5 MW with ultimate plans to upgrade the system to 240 MW service. Grand Valley Power is currently scheduling the 5 MW upgrade for some time 2008 or early 2009. 1.10 Floodplain No Federal Emergency Management Agency (FEMA) flood map was available for the Program area. To properly evaluate the area for flooding issues, a preliminary, 100 -year floodplain was developed for Clear Creek and its tributaries using HEC -RAS in accordance with FEMA guidance and specifications. The model surface was generated from a combination of Light Detection and Radar (LIDAR) and USGS topographic data. Additional survey data was collected along the Tom Creek corridor to refine the floodplain at the mouth of the canyon. The graphical result of the Clear Creek / Tom Creek analysis is provided as Figure 2 (see Maps) — the report is currently under review. The elevation differential between Tom Creek and SPECS 25-4 is sufficient to avoid the floodplain. 1.11 Noxious Weeds An initial survey of noxious weeds in the Clear Creek drainage was completed during November, 2006, to determine the extent of the problem. The results were presented in the Integrated Vegetation and Noxious Weed Management (IVNWM) Plan for the Chevron Clear Creek 8 -Inch Pipeline completed by WestWater Engineering (December, 2006) (see attached plan). The study indicated that about 50 -percent of the valley floor has been infested with noxious weeds. Supplemental information has been reported in a Clear Creek biological survey completed by WestWater during May of last year (see Section 9.1). The recent survey included the majority of the Clear Creek basin including the surrounding steep talus slopes. Survey results indicated that the entire drainage is affected by noxious weeds. Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company 6 Piccance Basin Natural Gas Development Program WestWater has been tasked with generating a new plan that specifically addresses the facility areas that are proposed for development. Initial findings from that study are expected in early April, but planned work will continue throughout the spring and summer seasons. The plan will be updated as new information is collected. In general terms, all identified noxious weeds will be removed during the initial site grading. Maintenance operations will include continuing control of all noxious weeds using a combination of removal and re -vegetation techniques. 1.12 Safety / Security / Emergency Response Chevron has initiated coordination activities to ensure that local fire departments, medical facilities, and emergency response providers are aware of the Program activities and hazards. Detailed Program facility maps along with the associated GPS coordinates have been provided to the Garfield County Sheriff's Office and local fire departments as part of the Program ERP. Multiple meetings have been held with the De Beque, Rifle fire departments to discuss hazards specific to a natural gas production field. Meetings with the Grand Valley (Parachute) fire department are planned. Members of the De Beque emergency response team have completed Chevrons's safety orientation for the Program. Efforts have been made to provide safety training to local landowners. Meetings also have been held with the Bureau of Land Management representatives of the Rocky Mountain Coordinating Group, an interagency fire management group that includes six federal agencies and the Colorado State Forest Service. Follow up meetings will be held with these organizations as the various facilities are constructed and become operational. Chevron safety personnel have had extensive discussions with local emergency medical service providers including St. Mary's Hospital and Medical Center (Grand Junction), CareFlight Air Ambulance (associated with St. Mary's), and Grand River Heath and Safety Center. Meetings with Community Hospital (Grand Junction) and Grand River Hospital (Rifle) are being planned. Personnel also have met with a local physicians group (including Dr. Krueger and Dr. Papenfus) that was organized to address the increasing demands on emergency response. Site personnel will be trained to report fires or other emergencies in accordance with the Chevron Emergency Response Plan (see attached ERP). The ERP is a living document that incorporates changes to facilities and operations as the various systems come on line. Coordination meetings have been held with the De Beque Fire Chief and other emergency agencies to address site specific issues. All buildings will be evaluated for sprinkler and alarm requirements in accordance with the 2003 International Fire Code (IFC) and the 2003 International Building Code (IBC). Portable fire extinguishers will be placed at a density consistent with the 2003 IFC and all personnel will be trained in their proper operation. Designated smoking areas will be established for the Complex area for all phases of the Program. ' Another area may be designated for limited outdoor cooking during motivational events. The proposed cooking area will be equipped with proper fire controls and will not be used during periods of high fire danger. All employees and contractors will comply with the provisions of the Chevron PBNCG Hazard Elimination / Safety (HES) Plan (see attached Safety Plans). Applicable requirements will be Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4- Special Use Permit Chevron North American Exploration and Production Company 7 Piceance Basin Natural Gas Development Program detailed in any Master Service Agreement and must be met prior to any contracting activity. Noncompliance with the policy will result in immediate dismissal and termination of the contract. 2 Water Supply / Wastewater Management Systems If you will be using water or will be treating wastewater in conjunction with the proposed use, please detail the amount of water that would be used and the type of wastewater treatment. If you will he utilizing well water, please attach a copy of the appropriate well permit and any other legal water supply information, including a water allotment contract or an approved water augmentation plan to demonstrate that you have legal and adequate water for the proposed use. Bottled water may be supplied to the Control Van and Booster Compressor Control Building but all restroom facilities will be provided at adjacent facilities (e.g., nearby well pads or CPF). This facility will be used intermittently for a limited amount of time and will not require long-term service. Fresh and produced water is required for the fracing operations on the pad but these activities are covered by COGCC regulations. 3 Site Plan / Property Map Submit a site plan /map drawn to scale that portrays the boundaries of the subject property, all existing and proposed structures on the property, and the County or State roadways within one (1) mile of your property. If you are proposing a new or expanded access onto a County or State roadway, submit a driveway or highway access permit. A site plan of the property and proposed facilities and access is provided on Drawing PBSR- 59825-DVW-RGL-PLT-URS-00000-00001 (scc Drawings). Figures I and 2 show County, State, and Federal roads that service the property (see Maps). Figure 2 shows some of the existing and proposed facilities / structures associated with the gas field development. Figure 3 is a map of the SP/BCS 25-4 vicinity, which includes the adjacent well pads that will be serviced by the booster compressors (see Maps). A surveyed plat of the physical location also is provided (see Plat). The boundary of the contiguous Chevron parcel is provided as an attached set of Assessor Maps. The maps are currently being incorporated onto one map that will be provided to the County when available. SP/BCS 25-4 will be located about 1.4 miles north northwest of an existing intersection of two ranch roads near the confluence of Clear Creek and Tom Creek, which is about 2.5 miles north northwest of the end of CR 2.11. No driveway permit will be required for the location because of its distance from existing County roads. An email from Garfield Road & Bridge has been provided as an attachment to document that a driveway permit will not be required (see Driveway Permit Email). 4 Topographic Vicinity Map Submit a vicinity map showing slope / topography of your property. for which a U.S.G.S. 1:24,000 scale quadrangle map will suffice. Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service PadIBCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company 8 Piceance Basin Natural Gas Development Program Area topographic in the project vicinity can be seen in Figure 2 and 3 (see Maps). Steep cliffs in the vicinity of these facilities represent a falling rock hazard. Mitigation measures will be incorporated into the site HES and ERP. 5 Assessor's Map / Adjacent Landowners Submit a copy of the appropriate portion of a Garfield County Assessor's Map showing all the subject property and public and private landowners adjacent to your property (which should be delineated). In addition, submit a list of all property owners, public and private landowners and their addresses adjacent to or within 200 ft. of the site. This information can be obtained from the Assessor's Office. We will also need the names (if applicable) of all mineral right owners of the subject property. (That information can be found in your title policy under Exceptions to Title). A copy of the appropriate portion of the Garfield County Assessor's Map with the marked site location is provided in the Assessor Maps attachment. The contiguous Chevron parcel is identified on a series of assessor maps provided as the Adjacent Property Owners — Assessor Maps attachment. A list of adjacent property owners is provided as the Adjacent Property Owner — List attachment. 6 Property Deed Submit a copy of the deed and a legal description of the subject property. Portions of the deed associated with the CPF tracts are provided as the Deed attachment. Additional ownership information has been provided as a land ownership declaration. 7 Authorization Letter If you are acting as an agent for the property owner, you must attach an acknowledgement from the property owner that you may act in his/her behalf. A letter authorizing URS - Washington Group to represent Chevron in the permitting activities is provided in the Authorization Letter attachment. 8 Water & Wastewater Management / Street Improvements / Project Visual Effects Submit a statement that specifically responds to each of the following criteria from Section 5.03 of the Zoning Regulations: (1) Utilities adequate to provide water and sanitation service based on accepted engineering standards and approved by the Board of County Commissioners shall either be in place or shall be constructed in conjunction with the proposed use. (2) Street improvements adequate to accommodate traffic volume generated by the proposed use and to provide safe, convenient access to the use shall either be in place or shall be constructed in conjunction with the proposed use; (3) Design of the proposed use is organized to minimize impact on and from adjacent uses of land through installation of screen fences or landscape materials on the periphery of the lot and by location of intensively utilized areas, access points, lighting and signs in such a manner as to protect established neighborhood character; 8.1 Water and Sanitation Service Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company 9 Piceance Basin Natural Gas Development Program As discussed in Section 2, no water or wastewater services, other than bottled water, will be needed at this location due to adjacent facilities. 8.1.1 Sanitation Services The Complex area will be maintained in a clean, safe, and sanitary condition, free of weeds or refuse. Down Valley Septic will provide trash collection services for SP/BCS 25-4. At ]east one 30 - cubic yard, "bear -proof", roll -off container will be provided on site to manage miscellaneous solid waste. The roll off will be constructed of steel including the lid(s). The container lid will be secured using a steel bar across the top of the lid with positive connection and a hasp lock at the sidewalls to restrict entry (or equivalent). Site personnel will be informed of the proper closure procedures. No hazardous materials will be disposed of in this container (posted accordingly). Sufficient signage, in multiple languages if required, will be posted to ensure that all users are aware of the appropriate regulations/procedures. 8.2 Road Improvements / Issues As previously mentioned, a driveway permit will not be necessary for this location. Chevron and the County Road and Bridge Department coordinate activities needed to maintain the surface of CR 211 to maintain access to the site. Additional coordination with the County Engineering Department is currently underway for planned improvements to CR 204. The Program private roads will be maintained by Hyland Enterprises, Inc. to ensure year round access to all facilities. A copy of the Hyland contract is provided as an attachment (see Hyland Contract). The Colorado River bridge that provides access to De Beque from Interstate 70 (I-70) is currently being rebuilt with a scheduled reopening in the summer of 2008. The current detour from the De Beque I-70 exit (Exit 62) requires heading east on the frontage road to W.5 road and back to 45 Road (Roan Creek). However, there is a height restriction of 15 -ft on this route. Vehicles greater than 15 -ft need to exit I-70 at Exit 75 (Parachute) and continue west on the frontage road toward De Beque to W.5 road and back to 45 Road (Roan Creek) north of De Beque. A map posted by Mesa County of the affected area is provided (see 45 Road Bridge attachment). 8.3 Visual Effects The Complex is located in a remote region of Garfield County and will have no direct visual effect on adjacent landowners. Visual effects include the physical presence of the facility, equipment / building lighting, and operational traffic. Outdoor lighting will be positioned downward to minimize lighting the canyon walls. Additional mitigation measures identified by the Chevron ESHIA process will be implemented as determined by project management. Facilities will be painted in accordance with best management practices such as those recommended in the Bureau of Land Management (BLM) Gold Book. 8.4 Reclamation and Re -vegetation Plan Activities at the SP/BCS 25-4 are expected to continue throughout the duration of the project, but the fracing operations will be moved to a new location after vicinity wells are completed. The Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company 10 Piceance Basin Natural Gas Development Program total site disturbance will be about 4.1 acres with a long-term disturbance of about 3.8 acres. A portion of Well Pad 598-25-4 may be re -vegetated after the removal of the fracing equipment, but the area may be maintained for in -field storage and / or fabrication. When the gas field is depleted the SP/BCS 25-4 equipment, gravel pad, and any material storage will be removed. The area then will be graded to the original contours, the stockpiled topsoil will be replaced, and the area will be planted with native vegetation. Reclamation and re -vegetation activities will be in accordance with requirements outlined in Garfield County Zoning Resolution 5.02.21 (11). General details of the re -vegetation activities are provided in the IVNWM Plan and Storm Water Management Plan (SWMP) and will be included in the final re -vegetation plan. 9 Use Specific Standards Depending on the type of Special Use Permit requested, you may need to respond to additional review standards in the Garfield County Zoning Resolution Section 5.00 [Supplementary Regulations]. This may include uses such industrial uses [section 5.03.07 & 5.03.08], Accessory Dwelling Units [section 5.03.21], Utility line/Utility Substations, etc. Specific sections of the Zoning Resolution which can he located on the Garfield County web site al httpalwww.garfieldcounty.comlbuilding_and_planning/index.htm, or information can be obtained from this office. Because SP/BCS 25-4 supports operations associated with the development of natural gas, additional requirements must be met for Garfield County approval. The following details applicable information not provided in Sections 1 through 8 that are required by the supplemental regulations. 9.1 Supplemental Industrial Operations Requirements (Zoning Resolution - §5.03.07) Impacts associated with the Program were described in general terms in the Plan of Development provided to the County during the first quarter of 2007. Chevron has provided supplemental information on a continuing basis. Specific industrial operations requirements that are applicable to the Complex are as follows: No water will be removed or discharged from any of the State's waters without applicable permits (Colorado Division of Natural Resources and Colorado Water Quality Control Commission). Any discharge will meet the drinking water standards controlled by the Colorado Department of Health and Environment. [§5.03.07 (1)(A)] Discharges associated with this facility will be limited to effluent possible dewatering operations associated with construction. All dewatering operations will conform to the provisions of the SWMP. [§5.03.07 (1)(A)] A recently completed study has identified portions of CR 204 to be a wildlife corridor for mule deer. Vehicle traffic to and from the site will affect these populations, but mitigation measures are currently being studied and evaluated. Mitigation recommendations will be provided to project management, who will evaluate the alternatives and implement appropriate measures. [§5,03.07 (1)(C)] A bond for the site reclamation after the cessation of activities will be provided as an addendum to this application upon determination of the total site disturbance. [§5.03.07 (2)(B)] Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001. Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company 11 Piceance Basin Natural Gas Development Program Outdoor food storage is prohibited to prevent the attraction of animals. No animals or pets will be housed at any Chevron facility. [0.03.07 (1)(C)] 9.2 Supplemental Industrial Performance Standards (Zoning Resolution - §5.03.08) All operations will comply with applicable County, State, and Federal regulations for water, air and noise pollution and shall not be conducted in a manner constituting a public nuisance or hazard. Specific information about noise, vibration, heat, dust, glare, etc. is provided in Sections 1 through 8. [§5.03.08 (1 through 4)] The SP/BCS 25-4 may be used as a fabrication / storage area for in -field operations. The remote location ensures that these operations should not impact adjacent property owners if these activities are needed during off hours. [0.03.08 (5)(D)4.] Initial loading / unloading operations will include the equipment and material deliveries required for construction. Additional loading operations will be associated with process water and frac supplies delivery. None of these operations will occur on or near County roads. [§5.03.08 (5)(D)5.1 9.3 Supplemental Regulation for Accessory Dwelling Units (Zoning Resolution - §5.03.021) While SP/BCS 25-4 typically will not be continuously manned, the following Garfield County requirements are applicable. All facilities will be permitted in accordance with the Garfield County Building Permit. The building permit applications for the Complex building will be submitted upon design completion and vendor selection. [0.03.021 (7)] 9.4 Chevron Specific Requirements No alcohol or firearms will be permitted at SP 25-4 or any other Chevron facilities / property. Outdoor smoking will be prohibited at this location. No smoking will be allowed inside any Chevron building / facility. 9.5 General Supplemental Information — Biological Survey / Cultural Resources A Class III Cultural Resources Inventory (Carl E. Conner and Barbara J. Davenport, June 3, 2005) and a Biological Survey (WestWater Engineering, July 11, 2006) were performed as part of the permitting process for an 8 -inch gathering pipeline. These studies provide baseline information for the ESHIA process and have been considered during the design process. Copies are provided as attachments for reference purposes. 9.6 Documentation Assuming the approval of the Special Use Permit, Garfield County will be informed when the site development begins. Verification of the installation will be documented in writing, by final site plan, and photographic record. All written documentation and site plans verifying compliance will be stamped by a certified Colorado Engineer. Doc. No.: PBSR-59825BVF-RGL-PMT-URS-00000-00001, Rev. A Service Pad/BCS 25-4 - Special Use Permit Chevron North American Exploration and Production Company 12 Piceance Basin Natural Gas Development Program Booster Compressor Station 25-4 100 50 D 100 200 Feet SITE MAP BOOSTER COMPRESSION STATION 25-4 Figure 3 Chevron MidContinent/Alaska SBU Chevron North America IWO AREA WESTERN SLOPE FIELDSKINNER RIDGE CD: Mare-GxTleld ST CD PROPERTY UNIOUE PROPERTY COMMON" PROJECT PICEANCE BASIN NATURAL GAS DEVELOPMENT PROGRAM URS WtAIAISI.On Drawly. DRAWING P8SR-ALL-TEC-MAP-OMV-9p00040001 REVISIONS AAA ELPM COST CENTFR CR TAB PRFIA GAG CIUR PROJECT me CGT NOJE NOREVISI DATE FIE' tPPRYU tote',. RA,. PE AEE. 91iE ?IVL Document Number Vicinity Map Directional Map SKR 598-25-4 Parking area PBSR-59825-INF LGN-GEG-00001-2899-02-B01 SKR-598-25-4 Improvements Garfield County, CO. Limit of Disturbance Proposed Access Road Existing Tom Creek Road Limit of Disturbance Location Map j — Proposed Pad Proposed Access Road Existing Access Road dkewn DY' .IDS DATE 2/06/2008 CHECKED Bw, GJM DATE- 2/06/2008 060108 R0. 2,899 SCALE None APPROVED BY JW DATE 2/06/2008 Vicinity Map SKR-598-25-4 improvements Chevron 1%00 MidContinnt/Alco kca SBU IIIIIIOICI-, evron North Am erica Explorcticpn and Prod LJcticrl Preliminary REVISION DATE DESCRwPRON Geotechnical IEnri Groupginee, Inc.ng GEOTECHNICAL 8 STRUCTURAL CONSULTANTS 2208 INTERSTATE AVENUE. GRAND JUNCTION. COLORADO 81303 (970) 245-1078 • FAX (910) 245.7115 Document Number PBSR-59825-INF-SRV-GEG-00001-2899-04-B01 6620 rry Drawn BY JDS DATE: 2/0612008 CHECKED 8Y. GJM DATE: 2/06/2008 OED J08 NO. 2,899 SCALE: 1 Inch = 100 Feet APPROVED BY: JW DATE: 2/0612008 Grading Plan SKR-598-25-4 improvement Chevron IwoSBU Ch rvron hl Orth ,Anr-)�ricca 111111101Explorction and Production Preliminary REVISION DESCRIPTION Geotechnical II,,Engineering Group, Inc. GEOTECHNICAL & STRUCTURAL CONSULTANTS 2308 INTERSTATE AVENUE, GRAND JUNCTION. COLORADO 81503 (470) 245-4079 • FAX (470) 2457115 6475' Cross Section Section Scale : H 1 Inch=60 Feet V 1 Inch=10 Feet 6470' a� 6465' 6460' 'E. 6455' 6450' 6445' w 6440' 6435' 6430' 6425'400 2‘1 6434' 1 Centerline v 6456' Berm Pad Elevatior=6446' 1.5 Edge of Disturbed Area 1 Edge of Disturbed Area 1.5 -300 -200 -100 0 SKR-598-25-4 EMBANKMENT FILL GENERAL CONSTRUCTION GUIDELINES 1) Native Soil Subgrade Compaction: After existing till has been removed and the foundation for the fill has been cleared and scarified, it shall be disked or bladed until it is free from large clods, brought to the proper moisture content (within 2 percent above or below optimum) and compacted to not less than 95 percent of maximum density as determined in accordance with ASTM D698. if soft/yielding subgrade conditions are encountered, stabilization may be required. 2) Embankment Fill Soils: Fill soils shall be free from vegetable matter or other deleterious substances and shall not contain rocks or lumps having a diameter greater than 6 inches. Fill materials shall be obtained from cut areas shown on the plans or staked in the field by the Engineer. Document Number PBSR-59825-!NF-SRV-GEG-00001-2899-05-B01 Horizontal Distance in feet 3) Moisture Content: Fill materials shall be moisture treated to within 1 percent below to 3 percent above optimum moisture content as determined from Proctor compaction tests. The contractor may be required to add moisture to the excavation materials in the borrow area if, in the opinion of the Soils Engineer, it is not possible to obtain uniform moisture content by adding water on the fill surface. It may be necessary to moisture treat soils to a wetter condition and stockpile in order to allow soils to hydrate and slake, prior to fill placement. The contractor may be required to rake or disk the fill soils to provide uniform moisture content through the soils. Should too much water be added to any part of the fill, such that the material is too wet to permit the desired compaction from being obtained, rolling and all work on that section of the fill shall be delayed until the material has been allowed to dry to the required moisture content. The contractor will be permitted to rework wet material in an approved manner to hasten it's drying. 100 200 300 A 4) Compaction of Embankment Fill: Selected fill material shall be placed and mixed in evenly spread layers. Fill materials shall be placed such that the thickness of loose materia! does not exceed 10 inches and the compacted lift thickness does not exceed 6 inches. After each fill layer has been placed, it shall be uniformly compacted to not less than the specified percentage of maximum density. Fill shall be compacted to at least 95 percent of the maximum dry density as determined in accordance with ASTM D698. 5) Compaction of Slopes: Fill slopes shall be compacted by means of Sheepsfoot Rollers or other suitable equipment. Compaction operations shall be continued until Slopes are stable but not too dense for planting and there is no appreciable amount of loose soil on the slopes. Compaction of slopes may be done progressively in increments of three to five feet (3' - 5') in height or after the fill is brought to its total height. Permanent fill slopes shall not exceed 1.5:1 (Horizontal to vertical). p,gy� DATE: Sri JDS 2/06/2008 CHECKED BY' GJM DATE, 2/06/2008 DEO JOB NO. 2,899 SCALE: 1 inch = 60 Feet APPROVED BY JW DATE: 2/06/2008 Cross Section A -A SKR-598-25-4 Improvement Chevron h/IidContinnt/A.14=3 1 -Ki SBU Ch vron North Aria erica Explorotion and Production Preliminary REVIs1DN DATE DESCRW1pN Geotechnical I , Engineering Group, Inc. GEOTECHNICAL & STRUCTURAL CONSULTANTS 2308 INTERSTATE AVENUE, GRAND JUNCTION. COLORADO 91503 (970) 2451078 • FAX (970) 245-7115 t 1 d :jj ConipIete, Production Services P.O. Box 1906 Rifle, CO 81650 March 23, 2007 Garfield County Road and Bridge 0567 County Road 352 Rifle, CO 81650 To Whom It May Concern: P: (970) 625-8270 F: (970) 625-8271 Hyland Enterprises, Inc provides road maintenance, including snow removal for Chevron on Deer Park, Tom Creek, Clear Creek and Chapel Well Roads year around. Bill Davis District Manager Storm Water Management Plan For Skinner Ridge Common Plan of Development Piceance Basin Field Operations Garfield County, Colorado September 2005 Revised June, October 2006, July 2007 Prepared for: Chevron U.S.A. Inc P.O. Box 36366 11111 South Wilcrest Houston, Texas 77099 Prepared by: CORDILLERAN Cordilleran Compliance Services, Inc 826 21 1/2 Road Grand Junction, Colorado 8150 SKINNER RIDGE SWMP CHEVRON U.S.A., INC. TABLE OF CONTENTS 1.0 INTRODUCTION 3 1.1 STORM WATER RUNOFF PERMITTING REQUIREMENTS 3 1.2 PROJECT DESCRIPTION AND BACKGROUND 4 1.3 PROJECT OWNER AND OPERATOR 4 2.0 CONSTRUCTION SITE DESCRIPTION 5 2.1 SITE LOCATION AND CONSTRUCTION AREA DESCRIPTION 5 2.2 SCHEDULE OF CONSTRUCTION ACTIVITIES 5 2.3 RUNOFF CHARACTERISTICS 6 3.0 POTENTIAL, POLLUTION SOURCES 8 4.0 DESCRIPTION OF CONTROL MEASURES 9 4.1 SOIL EROSION AND SEDIMENT CONTROLS 9 4.1.1 Uphill topsoil stockpile/diversion berm 9 4.1.2 Downhill silt fence 9 4.1.3 Hay bale check dams 9 4.1.4 Rock check dams 10 4.1.5 Road drainage relief 10 4.1.6 Culvert inlet and outlet protection 10 4.1.7 Soil berms 10 4.1.8 Straw waddles 10 4.1.9 Seeding of disturbed areas 11 4.1.10 Rocky areas 11 4.1.11 Gravel surfacing 11 4.1.12 Natural vegetative cover 11 4.1.13 Sediment Basin 12 4.1.14 Diversion Ditch 12 4.1.15 Erosion Control Matting 12 4.1.16 Additional BMP references 12 4.2 STORM WATER MANAGEMENT CONTROLS 13 4.3 OTHER CONTROLS 13 4.3.1 Waste management and disposal 13 4.3.2 Fuels and materials management 14 4.3.3 Construction Site Housekeeping 15 5.0 INSPECTION AND MAINTENANCE PROCEDURES 16 6.0 NON-STORMWATER DISCHARGES 18 7.0 FINAL STABILIZATION 19 8.0 CERTIFICATIONS 20 8.1 OWNER/APPLICANT CERTIFICATION 20 8.2 CONTRACTOR/SUBCONTRACTOR CERTIFICATION 21 SKINNER RIDGE SWMP CHEVRON U.S.A., INC. Figure 1 Figure 2 LIST OF FIGURES Skinner Ridge Location Final Stabilization Seed Mixture LIST OF APPENDICES Appendix A Skinner Ridge Storm Water Permit Application Appendix B Typical Storm Water BMP Details Appendix C Storm Water Inspection Form ii SKINNER RIDGE SWMP CHEVRON U.S.A., INC 1.0 INTRODUCTION This Storm Water Management Plan (SWMP) is written to comply with the Colorado Department of Public Health and Environment's (CDPHE) General Permit No. COR - 03000 issued on June 30, 2002 and will expire on June 30, 2007, and related U.S. Environmental Protection Agency (USEPA) National Pollutant Discharge Elimination System (NPDES) storm water regulations. This SWMP addresses construction activities associated with development of the natural gas resources in the Skinner Ridge area. This SWMP is intended to be periodically updated as needed to address planned developments, new disturbances, and other changes needed to manage storm water and protect surface water quality. 1.1 Storm Water Runoff Permitting Requirements The Federal Clean Water Act [Section 4-02(p)] requires that discharges of pollutants to waters of the United States from any point source be regulated by NPDES permits. In November 1990 the USEPA published final regulations that established application requirements for storm water associated with construction activity for soil disturbances of 5 acres or more be regulated as an industrial activity and covered by an NPDES permit. In December 1999 the USEPA published final Phase II NPDES regulations that established application requirements for storm water associated with construction activity for soil disturbances to be regulated as an industrial activity and covered by an NPDES permit. These regulations became effective July 1, 2002. On June 30, 2005, the State of Colorado stormwater regulation went into effect to require Colorado Discharge Permit System (CDPS) permits from the Water Quality Control Division (the Division) for stormwater discharges from construction activities associated with small construction activity for oil and gas sites (those that disturb between one and five acres). Permitting for oil and gas construction sites that disturb five or more acres during the life of the project, or are part of a larger common plan of development, has been required since 1992. Although federal permit coverage for these discharges was conditionally exempted from the Federal Clean Water Act by the 2005 Federal Energy Bill, the Colorado Water Quality Control Commission has maintained the requirement within Colorado's regulations, and therefore permit coverage for these activities remains in effect in Colorado. These requirements are in addition to the requirements of the Colorado Oil and Gas Conservation Commission (COGCC). Construction permits are required for oil & gas activities that disturb 1 or more acres during the life of the project or are part of a larger common plan of development. CDPHE considers a common plan of oil and gas development to mean development of several well pads and/or related infrastructure in a contiguous area either during the same time period or under a consistent plan for long-term development. 3 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 1.2 Project Description and Background The Skinner Ridge Common Plan of Development will be located in Garfield County, Colorado within Townships 5, 6, 7, 8 & 9 South, Ranges 97 & 98 West. The town of Debeque, Colorado is the nearest population center. The Skinner Ridge area is located approximately 14 miles north of DeBeque. The current drilling and development plan includes pad construction, access road improvement/construction, pit construction, installation of associated facilities, well drilling, well completion, well testing and pipeline construction. The area of disturbance including the natural gas well pads, the access roads and gathering system pipeline will be greater than twenty-six acres. 1.3 Project Owner and Operator The property owner and operator is Chevron U.S.A., Inc. Their address is: Chevron U.S.A. Inc. 11111 S. Wilcrest Houston, Texas 77099 Ph (281) 561-3664 The Chevron contact person for the project is Michael DeBerry, Manager, Piceance Basin Operations. Mr. DeBerry can be contacted by phone at 970-257-6005. The Chevron administrator for the Storm water Management Plan (SWMP) is Hector E. Cavazos. Mr. Cavazos can be contacted by phone at (281) 561-3664. Chevron will be in charge of all aspects of this project. Contractor(s) will be employed for construction and drilling, but all work will be supervised by Chevron and all decisions will be made by Chevron. 4 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 2.0 CONSTRUCTION SITE DESCRIPTION 2.1 Site Location and Construction Area Description The Skinner Ridge project area will be located in Garfield County, Colorado within Townships 5, 8 & 9 South, Range 97 West and Townships 5, 6 & 7 South, Range 98 West. In areas that are disturbed by construction, soil materials will be managed so that erosion and sediment transport are minimized. Nearby drainages will be protected by appropriate measures. The road will be graded and sloped to drain into roadside ditches and to direct runoff from adjacent slopes away from the road surface. The development consists of the construction of roads, pipelines, drilling pads and gas treatment facilities. The construction of the facilities in the development area will be done using conventional cut and fill, trenching and earth moving techniques. Reclamation and final stabilization will be conducted as described in Section 7. 2.2 Schedule of Construction Activities Natural gas exploration and development activities are planned for several years. Existing and future well pads and other disturbances are included in this SWMP. For well pads that will be constructed, Best Management Practices (BMPs) will be installed prior to, during, and immediately following construction. Development of the natural gas resource and construction of necessary improvements on this property will likely continue for the next 3 to 5 years. The development of natural gas wells is generally accomplished in three distinct work phases. The first phase is the Development (Construction/Drilling/Completion), the second phase is the Production (Operation/Maintenance), and the third phase is the Final Reclamation. Each work phase is briefly discussed below. Development (Construction/Drilling/Completion/Reclamation) The development phase includes the following activities; pad construction, well drilling, well completion, gas line installation, and pad area reclamation. Pad reclamation is accomplished by backfilling the reserve pit, contouring disturbed soils to conform with the surrounding terrain, replacing the stockpiled top soil, seeding of disturbed soil areas in order to reestablish a cover vegetation, and construction of erosion and sediment control structures. The completion of the wells (gas production) generally triggers a one - 5 SKINNER RIDGE SWMP CHEVRON U.S.A., INC year time period in which the reclamation phase of work should be completed. For the specific final stabilization seed mixture please refer to the Figure 2. Production (Operation/Maintenance) The production phase includes the operation and maintenance activities during natural gas production. The typical equipment on a pad during the production phase consists of a wellhead, a separation unit, from one to several 300 -barrel capacity aboveground tanks for condensate, and an above ground tank for storing produced water. Gas pipelines are also installed during this phase of work. Reclamation activities during this phase include maintenance of revegetated areas and maintenance of the erosion and sediment control structures. Natural gas wells in the Skinner Ridge area are projected to produce for approximately 20 to 30 years. Final Reclamation The pad area will be reclaimed by contouring disturbed soils to conform to the surrounding terrain, by replacing the stockpiled top soil, by seeding of disturbed soil areas in order to reestablish cover vegetation, and by construction of erosion and sediment control structures as needed. If the exploratory holes yield economically viable natural gas resources; additional gas well drilling will proceed. Once the well is completed and brought into production it will operate as an unmanned facility twenty-four hours per day, seven days per week, and 365 day a year. Chevron personnel or contract personnel will visit the site daily or at a minimum one per week. Once stabilization is achieved, defined as uniform vegetative cover established with a density of at least 70 percent of pre -disturbance levels, a well pad may be removed from this SWMP for sediment controls. Best Management Practices will stay in effect as an ongoing company practice to insure proper management of storm water protection. However, if petroleum hydrocarbons or other chemicals impact stormwater as a result of industrial activities onsite, the impacted stormwater will be addressed by following a spill prevention control and countermeasures (SPCC) plan. 2.3 Runoff Characteristics Runoff characteristics are based on site topography, soil type, and soil/vegetative cover. According to the NCRS, soils for the Skinner Ridge project area consist of the following soil types: 1. Biedsaw-Sunup gravelly loams, 10 to 40% slopes — is on side slopes of mountains and ridges. Native vegetation is mainly juniper, sagebrush, shadscale saltbrush, greasewood, ephedra, yucca, and Indian ricegrass. Elevation is 5,100 to 6,600 feet. Biedsaw soil is 6 SKINNER RIDGE SWMP CHEVRON U.S.A., INC deep and well drained. Permeability is slow and water capacity is high. Runoff is rapid and water erosion is severe. Sunup soil is shallow and well drained. Permeability is moderate and water capacity is very low. Runoff is rapid and water erosion is severe. 2. Cumulic Haploborolls, 1 to 3% slopes — are on flood plains. Vegetation is narrowleaf, cottonwoods, maples, willows, grasses, and forbs. Elevation is 5,800 to 7,400 feet. The soil is deep and is well drained to poorly drained. Permeability is moderate to moderately slow and water capacity is low to high. Runoff is slow and water erosion is slight. 3. Grobutte very channery loam, 30 to 60% slopes — is on steep hills and mountainsides. Native vegetation is shrubs and grass. Elevation is 6,000 to 8,000 feet. The soil is deep and well drained. Permeability is moderately rapid and water capacity is low. Runoff is rapid and water erosion is very severe. 4. Happle very channery sandy loam, 12 to 25% slopes — is on alluvial -colluvial fans and toeslopes. The soil is deep and well drained. Native vegetation is sagebrush, grasses, and forbs. Elevation is 5,400 to 6,200 feet. Permeability is moderate and water capacity is low. Runoff is medium and water erosion is severe. 5. Happle-Rock outcrop association, 25 to 65% slopes — is on side slopes and canyon rims. The soil is deep and well drained. Native vegetation is sagebrush, grass, and forbs. Elevation is 6,200 to 7,200 feet. Permeability is moderate and water capacity is low. Runoff is rapid and water erosion is severe. 6. Tosca channery loam, 25 to 80% slopes — is on mountain side slopes and footslopes. The soil is deep and well drained. Native vegetation is serviceberry, Gambel's oak, snowberry, and grasses. Elevation is 6,200 to 8,500 feet. Permeability is moderate and water capacity is low. Runoff is rapid and water erosion is very severe. The runoff coefficient value prior to and after construction will range from 0.10 to 0.40; depending on the topography of each well pad. The pre -disturbance percent ground cover ranges from 60 to 85 percent. For specific pad percent ground cover information please refer to the plat maps. Possible receiving waters include unnamed tributaries of Tom Creek, Deer Park Gulch, Clear Creek, Roan Creek, and the Colorado River. 7 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 3.0 POTENTIAL POLLUTION SOURCES Potential pollution sources associated with construction sites and natural gas development include: • Sediment resulting from erosion of soil stockpiles and other areas cleared of vegetation; • Leakage of fuels and lubricants from equipment and spills from fueling; • Trash and debris from clearing activities, construction materials, and workers; • Leakage or spills from storage tanks and process equipment associated with natural gas development. The most common source of pollution from pad and access road construction is sediment, which can be carried away from the work site with storm water runoff and impact the water quality of a receiving stream. Clearing, grading, and otherwise altering previously undisturbed land can increase the rate of soil erosion over pre -disturbance rates. Refined Petroleum products can also be potential storm water pollutants. These products are used in construction activities to power or lubricate equipment and include: fuel, gear oil, hydraulic oil, brake fluid, and grease. Debris from laydown areas, residue from equipment cleaning and maintenance, and solid waste generated from land clearing operations and human activity (trees, brush, paper, trash, etc.) present other potential pollution sources within the construction site. Spills or leaks from potential sources are described in the SPCC plan. Response to certain events may require specialized training due to health and safety concerns. 8 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 4.0 DESCRIPTION OF CONTROL MEASURES 4.1 Soil Erosion and Sediment Controls The objective of erosion and sediment controls is to minimize the release of sediments to storm water runoff. This can be accomplished through the use of structural and/or nonstructural controls. This section describes erosion and sediment controls to be used at active construction sites to minimize possible sediment impacts to storm water runoff. The proposed erosion control features can include but not limited to: • Placement of any topsoil stockpiles along the cut -slope side of the pad to divert run-on; • Installation of silt fence, straw bales or diversion ditches at or below the toe of fill slopes where located within 100 feet of surface water drainages or where steep slopes will likely result in rapid drainage from the location to nearby drainages, and; • Installation of check dams in areas of concentrated flow; • Use of erosion control matting, rock armoring, and soil berms to prevent soil erosion. 4.1.1 Uphill topsoil stockpile/diversion berm In order to divert surface runoff from upgradient areas away from construction areas, salvaged topsoil may be placed on the uphill side of the road cut slope. The topsoil stockpile may be placed and graded to form a diversion berm that will direct surface water away from the road. 4.1.2 Downhill silt fence Silt fence can be installed at the down gradient edge of the road and other fill slopes located within 100 feet of a surface drainage. Silt fences may also be required in areas where steep slopes will likely result in fast flow of water from the location to nearby drainages. Typical silt fence installation details are given in Appendix B. 4.1.3 Hay bale check dams Hay bale check dams should be installed at suitable locations to slow the concentrated flow of drainage water. Typical hay bale check dam installation details are given in Appendix B. 9 SKINNER RIDGE SWIM CHEVRON U.S.A., INC 4.1.4 Rock check dams Rock check dams will be installed in areas of concentrated flow. Rock check dams may be used instead of hay bale check dams in areas where steep slopes, high flows, or long- term exposure are expected to result in failure or frequent maintenance of a hay bale structure. Typical hay bale check dam installation details are given in Appendix B. 4.1.5 Road drainage relief Culverts, rolling dips or water bars may be used to provide drainage of water from road surfaces as needed to drain low areas or to reduce the amount of water flowing on the road surface. Road drainage relief should be provided as needed and in accordance with generally accepted practices. Guidance for road drainage relief is available in the document "Low -Volume Roads Engineering, Best Management Practices Field Guide," developed by the U.S, Forest Service and available on-line at http://www.blm.gov/bmp/field%20guide.htm. Depending on the location and type of drainage relief installed, additional sediment control features may be needed such as sediment removal at the inlet and erosion protection at the outlet. 4.1.6 Culvert inlet and outlet protection Installation of culverts may be needed in certain areas where the access road intersects intermittent drainages. The culvert inlet area will include a sediment sump. The culvert outlet area will include an energy dissipation feature that should be installed to promote lateral spreading of the water, 4.1.7 Soil berm Soil berms may be used to divert drainage away from areas of concern or to direct flow toward sediment control structures. Where used, soil berms shall be constructed of soil with sufficient fines to minimize flow through the berm. Berms shall be at least 18 - inches tall and will be compacted in place by wheel rolling with suitable rubber tired, heavy equipment. 4.1.8 Straw waddles Straw rolls are intended to capture and keep sediment on the slopes. Straw rolls are useful to temporarily stabilize slopes by reducing soil creep and sheet and rill erosion until permanent vegetation can be established. Straw rolls will last an average of one to two years. The slope needs to be prepared before the rolls are placed. Small trenches are created across the slope on the contour. The trench should be deep enough to 10 SKINNER RIDGE SWMP CHEVRON U.S.A., INC accommodate half the thickness of the roll (about 3"-5"). The trenches need to be 10 to 25 feet apart. The rolls need to be installed perpendicular to water movement, parallel to the slope contour. Start by installing rolls from the bottom of the slope. The rolls need to fit snugly against the soil. No gaps should be between the soil and roll. Willow or wooden stakes need to be driven through the roll and soil. There should only be 1 to 2 inches of stake exposed above the roll. The stakes should be installed every 4 feet. 4.1.9 Seeding of disturbed areas Project areas disturbed by construction will be revegetated as soon as practicable following construction. Areas that will be revegetated will primarily be cut and fill slopes associated with grading activities. The permanent mix, rate, application method, and supplemental materials will be selected by the revegetation contractor. It is anticipated that this will include suitable grass species supplemented by cereal crops. 4.1.10 Rocky areas In areas of the project, the depth to bedrock is expected to be relatively shallow. Excavation in these areas will result in rock fragment and pieces being exposed on the ground surface. Rock pieces, typically sedimentary sandstone, siltstone or shale, will provide a surface that is erosion resistant. Both cut and fill slopes in rocky areas may result in a surface that is similar to gravel surfacing (see below) and depending on the extent of rock pieces may preclude the use of downstream sediment retention BMPs (such as berms or silt fence). The person selecting BMPs should use experience and good judgment in determining which rocky soils will or won't require downstream BMPs. 4.1.11 Gravel surfacing Gravel surfacing may be used to cover soil in areas of high traffic such as roads, facility areas, and the area near well heads. Gravel surfacing forms a layer that protects soil from wind and water erosion and prevents vehicle tracking. 4.1.12 Natural vegetative cover An effective way to prevent erosion and sedimentation is to preserve the existing vegetation. It can provide both dust control and a reduction in erosion potential by increasing infiltration, trapping sediment, stabilizing the soil, and dissipating the energy of hard rain. Natural vegetative cover can be applied to any site and is not restricted by the type of soil, topography or climate. 11 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 4.1.13 Sediment basins A sediment basin is a way to capture sediment from stormwater runoff before it leaves a development site. The basin will allow storm water runoff to collect in a basin, where the sediment can settle. Sediment basins must be located in an area that is easily accessible to maintenance crews for removal of accumulated sediment. 4.1.14 Diversion ditch Diversion ditches convey concentrated runoff of surface water from the areas of disturbance to a stabilized area. The ditch should be excavated to a depth and width that can handle the expected flows. The ditch should be sloped so that the water velocities do not cause excess erosion. The ditch can be lined with check dams, vegetation, rock and/or other filter BMPs. 4.1.15 Erosion control matting Erosion control matting is a way to provide erosion protection and assist in the establishment of vegetation. The matting selection should be based on the slope ratio. Typical erosion control matting installation details are given in Appendix B. 4.1.16 Additional BMP references The structural and non-structural BMPs listed above are intended to include all BMPs that may be used for gas gathering projects. However, there may be situations where a BMP is needed but not included above or project personnel may need additional information on the use, specification, and maintenance of BMPs. Additional information resources are listed below: • For oil and gas operations, the Bureau of Land Management and U.S. Forest Service have developed "Surface Operating Standards and Guidelines for Oil and Gas Exploration and Development," "Gold Book." The most recent version (fourth edition) of this is available on the internet at littp://www.blm.gov/bmp/GoldBook_Draft v12.pdf. • For construction BMPs the Urban Drainage and Flood Control District, a Colorado front range group of city and county agencies has developed a BMP manual that is available on the internet at http://www.udfcd.org/usdcm/vol3.htm • For construction BMPs and surface stabilization methods, the Alabama Soil and Water Conservation Committee has developed "Erosion Control, Sediment Control and Stormwater Management on Construction Sites and Urban Areas, Volume 1 Developing Plans and Designing Best Management Practices." This information is available on the internet at 12 SKINNER RIDGE SWMP CHEVRON U.S.A., INC http://swcc.state.al.us/pdf/ASWCC_June_2003 Alabama Handbook Constructio n E&S Control.pdf • For access roads, the US Forest Service and Bureau of Land Management have developed "Low -Volume Roads Engineering, Best Management Practices Field Guide," which is available on the internet at http://www.blm.gov/bmp/field%20guide.htm 4.2 Storm Water Management Controls Structural BMPs will be installed, inspected, and maintained as needed. This SWMP will be revised as needed to address new disturbances. Depending on the type and location of new facilities there may be a need for inclusion of new and different BMPs. In general, new development should be planned with consideration for storm water quality (e.g. minimize disturbed area and maximize distance from surface water drainages, as practicable). Other developments on the property, primarily existing andlor improved roads, not currently or specifically addressed in the SWMP will be periodically checked for erosion and drainage problems. This is especially important for access roads located within 100 feet of surface drainages or creeks. If problems are noted, they should be reported to the Operations Supervisor andlor Chevron SWMP administrator. Problem areas may be addressed through construction activities, but will likely need to be addressed through BMPs which will be added to the plan as needed. 4.3 Other Controls 4.3.1 Waste management and disposal Pad and access road construction will generate various other wastes during the course of construction. Other wastes may include the following: • Trees and shrubs from clearing operations, • Trash and debris from construction materials and workers, • Sanitary sewage. Each of these wastes will be managed so as to not contribute to storm water pollution. Trees and shrubs may be piled along the toe of fill slopes to provide additional sediment control. Construction trash and debris will be collected in containers and hauled off-site for disposal in approved landfills. Sanitary waste will be containerized in portable toilets or other storage tanks with waste materials regularly pumped and transported off-site for disposal at approved facilities. 13 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 4.3.2 Fuels and materials management Petroleum Products Petroleum products which may be present at the construction site include but not limited to: gasoline, diesel fuel, lubricant oils, hydraulic oils, used oils, and solvents. Gasoline and diesel fuel will be stored in portable storage tanks with secondary containment. Lubricant, hydraulic, and miscellaneous oils and solvents will be stored in 55 -gallon or smaller containers. Pollutants from petroleum products used during construction activities adhere easily to soil particles and other surfaces. In case of a spill or leak, soils contaminated with petroleum products will be contained and removed to an approved disposal site. Proposed soil erosion and sediment control practices will aid in retention of spills or leaks. Use of secondary containment and drip pans/sorbent materials will reduce the likelihood of spills or leaks contacting the ground. Proposed maintenance and safe storage practices will reduce the chance of petroleum products contaminating the road site. Oily wastes such as crankcase oil, cans, rags, and paper containing oils will be placed in proper receptacles and disposed of or recycled. An additional source of petroleum contamination is leaks from equipment and vehicles. Routine daily inspections will be conducted to identify leaks and initiate corrective actions, if needed. The local SPCC plan will be activated as appropriate to manage any petroleum product spill. The following guidelines for storing petroleum products will be used. • All product containers will be clearly labeled. • Drums will be kept off the ground within any required secondary containment and stored under cover if needed. • Fuel tanks will be stored within any required secondary containment. • Lids of drummed materials will be securely fastened. • Emergency spill response procedures will be available on-site. Persons trained in handling spills will be on call at all times. • Spill clean up and containment materials (absorbent, shovels, etc.) will be easily accessible. Spills will be immediately cleaned up and contaminated materials will be properly stored on site until they can be disposed of in accordance with applicable regulations. • Storage areas and containers will be regularly monitored for leaks and repaired or replaced as necessary. Workers should be reminded about proper storage and handling of materials during weekly subcontractor or safety meetings Other Chemicals Products Management Additional materials will be used and stored on site for use in construction. These materials will be stored appropriately and managed to minimize spills and leaks. Storage areas will be regularly inspected and any minor spills or leaks will be cleaned up immediately. 14 SKINNER RIDGE SWMP CHEVRON U.S.A., INC Materials Management The construction contractor will maintain a laydown or staging area for equipment and materials storage on site. These areas will be maintained with good housekeeping and will be inspected on a regular basis for spills, leaks, and potential contamination. 4.3.3 Construction Site Housekeeping Housekeeping will consist of neat and orderly storage of materials and containerized fluids. Wastes will be temporarily stored in containers and regularly collected and disposed of at approved off-site facilities. If spills occur prompt cleanup is required to minimize any commingling of waste materials with storm water runoff. Routine maintenance will be limited to fueling and lubrication of equipment. Drip pans and/or sorbent material will be used during routine fueling and maintenance to contain spills or leaks. Any waste product from maintenance will be containerized and transported off site for disposal or recycling. All attempts will be made to minimize major equipment overhauls conducted on site. Equipment will be transported off site for major overhauls if required. Cleanup of trash and discarded materials will be conducted during the course of each work day. Cleanup will consist of patrolling the road way, access areas, and other work areas to pickup trash, scrap debris, other discarded materials, and any contaminated soil. These materials will be disposed of appropriately. 15 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 5.0 INSPECTION AND MAINTENANCE PROCEDURES To meet requirements of the General Permit inspection and maintenance of erosion and sediment controls must occur during the project. Continued inspection and maintenance is required for specific structures after construction is completed. The inspection program will include the following: 1. A qualified person familiar with the SWMP and control measures will conduct the inspections. 2. Inspections will cover these area of the construction site: • Disturbed areas without stabilization, • Material storage areas, • Best Management Practices (BMPs), • Surface water diversions, • Downgradient areas, • New access roads, and • Locations where vehicles enter or exit the site. 3. Inspections will occur at least once every 14 calendar days and after a significant precipitation or snow melt event that causes erosion; depending on safety concerns. 4. Completed and stabilized sites will be inspected at Least once per month; depending on safety concerns. 5. A log of inspections will be kept. 6. Water quality will be assessed for all receiving streams and discharge areas 7. Disturbed areas and material storage areas that are exposed to precipitation will be inspected for evidence of pollutants entering nearby drainages. 8. Check dams, silt fences, and/or other BMPs will be inspected for evidence of deterioration, under -cutting, and build up of sediment. Sediment will be removed as required. 9. Roads used for vehicle access will be inspected for evidence of off-site sediment transport. 10. The SWMP will be modified as necessary to include additional controls designed to correct identified problems. Approved revisions to the SWMP will be made within 7 days of the approval or sooner at the discretion of the Operations Supervisor. 11. An inspection report summarizing the scope of the inspection, the name of the person conducting the inspection, date of inspection, and observations relating to the implementation will be prepared. Inspection reports will be retained for at least 3 years from the date that the site is finally stabilized. 12. Actions taken to modify any storm water control measure will be recorded and maintained with the SWMP. 13. If no deficiencies are found during the inspection, the report will contain certification that the site is in compliance with the SWMP. Signatures will be in accordance with the General Permit Conditions, Part E. 1 (Appendix A). 16 SKINNER RIDGE SWMP CHEVRON U.S.A., INC Maintenance will include prompt repairs and/or adjustments to any erosion and sediment control structures that are deteriorating or found to be performing inadequately. Repairs should be made as soon as possible and prior to the next inspection or anticipated storm event. Chevron U.S.A. or designated contractor(s) will maintain, on-site all materials necessary to make any reasonably expected repairs such as silt fence, hay bales, and stakes. 17 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 6.0 NON-STORMWATER DISCHARGES No non -storm water discharges are anticipated from the project. Possible exceptions include fire prevention/suppression or dust control activities. 18 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 7.0 FINAL STABILIZATION Areas which have been disturbed are considered to be stabilized when a uniform vegetative cover with a density of 70 percent of the pre -disturbance levels has been established or when an equivalent permanent, physical erosion reduction method is in- place. For the specific final stabilization seed mixture please refer to Figure 2. Areas at which are not used for facilities, access roads, materials storage yards, or other work areas will be stabilized with vegetation. Areas that are stabilized with vegetation will be considered to have achieved final stabilization when a uniform stand of vegetation with a density of at least 70 percent of the pre -disturbance has been established. Other areas which may include facilities, access roads, materials storage yards, and other work areas will be considered fully stabilized with the use of permanent, physical erosion reduction methods which include, but are not limited to: 1. Surface hardening — covering of the soil surface with hardened products such as concrete or asphalt pavement. 2. Surface covering — covering of the surface soil with structure that inhibits contact of precipitation with the soil surface which is generally considered to be placement of a structure (building or tank) over the soil surface. 3. Gravel surfacing — gravel surfacing will be applied in areas such as access roads, materials storage yards, and other work surfaces. Some gravel may be lost due to erosion from intense precipitation events or due to vehicle traffic. Gravel surfaces will be periodically inspected to determine the need for gravel replacement. Gravel surfaces will be replaced or repaired (through grading) when inspection reveals that the gravel surface is no longer effectively covering the soil surface. 19 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 8.0 CERTIFICATIONS 8.1 Owner/Applicant Certification I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, that the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Signature: Name: Title: Date: Michael DeBerry Piceance Basin Operations Manager Owner Name: Chevron U.S.A Inc. Owner Address: 11111 S. Wilcrest Houston, Texas 36366 Site Name and Location: SWMP Prepared by: Skinner Ridge Common Plan of Development Piceance Basin Field Operations Townships 5, 6, 7, 8 & 9 South Ranges 97 & 98 West Garfield County, Colorado Cordilleran Compliance Services, Inc. 826 21 '/2 Road Grand Junction, CO 81505 20 SKINNER RIDGE SWMP CHEVRON U.S.A., INC 8.2 Contractor/Subcontractor Certification All contractors and subcontractors that will perform construction activities that could impact storm water will be familiar with the SWMP and will sign the following certification. Contractor Certification I certify under penalty of law that I understand the terms and conditions of the CHEVRON USA SKINNER RIDGE SWMP and associated CDPS General Permit that authorizes storm water discharges associated with industrial activity from the construction sites identified as part of this certification. Signature: Name: Title: Date: Representing: Company: Address: Address: Phone: Work to be conducted: Activity 1: Activity 2: Activity 3: Activity 4: 21 DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES CHECK DAM Deflnitiort Small temporary darn constructed across a swals or drainage .ditch. Purposes To reduce the velocity of stormwater flows and erosion of the Swale or doh. L mi The distance such that points A and B are of equal elevation. From: Virginia Soli and Water Conservation Commission, 1985 ()DEC »OO.ao C-60 FIGURE C-21 Check Dam 9-1-99 Urban Drainage and Flood Control District 7. ROCK BERM (RB) This technique is useful to filter sediment from concentrated flows and/or runoff of moderate grades and larger drainage areas. Additionally, rock berms may be utilized to reduce velocity of flows within constructed channels. Limitations: - Availability of rock - Anchor rock into soil - Difficult to remove after construction - Require regular maintenance due to sediment build-up Installation: Use medium to large diameter rock May secure rock within woven wire sheathing but not required Berm side slopes should be 3:1 or flatter Top of berm should be a minimum of 2 feet wide Construction Activities: Access roads, well/tank battery pads, and flow/gathering pipelines ROCK BERM N.T.B. RAPPS Final 5-1044 �+ A-7 CROSS SECTION N.T.S. DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES TEMPORARY DIVERSION DIKE Definition A temporary ridge of compacted soli located at the top, midslope, or base of a disturbed area. Purposes 1. To divert storm runoff from higher drainage areas away from unprotected slopes to a permanent channel or temporary channel diversion. 2. To divert sediment -laden runoff lrom the midslope of a disturbed area to a temporary slope drain. 3. To divert sediment -laden runoff from the base of a disturbed area to a sediment trapping facility. ii MN .11 7- orefilit„ fikAl .11i:- IiiiiiP11110.111i1=----7-2::1111 =,1�_ 1� DIIi1 1111 -Niki l yin ilii ii ,a----1.4, , .‘1111111 1 IP From: Virginia Sol C-36 and Water Conservation Commission, 1985 FIGURE C-9 Temporary Diversion Dike 9-1-99 Urban Drainage and Flood Control District B. DIVERSION/EARTHEN DIKES (WATER BARS) (DD) This technique may be used to collect runoff from undisturbed areas and divert around construction activity. Additionally, dikes are used to limit the accumulation of water volume by diverting runoff from construction area into a stabilized outlet or well -vegetated area. Limitations: Not for use on concentrated flows May cause concentrated flows from sheet flow Requires vegetative cover or other filter at discharge point Installation: Pile and compact soil Dike sidesiopes should be 2:1 or flatter Angle dike at approximately 30° to slope Increase frequency with increased slope Outlet dike into well -vegetated area or install secondary control such as rock filter or straw bales Construction Activities: Access roads, well/tank battery pads, and flow/gathering pipelines 2:1 SLOPE OR FLATTER EDGE OF R.O.W. CROSS SECTION WATER FLOW EXISTING OR GRADED RIGHT-OF-WAY EDGE OF R.O.W. UPSLOPE TOE WATER FLOW g. WATER FLOW SILT FENCE OR STRAW BALES OUTLET ONTO STABILIZED AREA AS NEEDED (WELL VEGETATED) PLAN VIEW N.T.S. RAPPS Final 5.90-04 A-8 DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES TEMPORARY SEDIMENT BASIN Definitions A temporary basin with a controlled stormwater release structure, formed by excavation or construction of an embankment of compacted soli. Required for all drainage areas greater than 1 area. Purposes To detain sediment -laden runoff from distributed areas to allow the majority of the sediment to settle out. Limiting Geometry: VW greater than 2.0 100 -Year or Larger Emergency Spillway Emergency spillway should not be constructed over fill materiel Required volume to crest of emergency spillway " 1800 cubic feet per acre of drainage area. Should be cleaned out prior to becoming half full. From: Virginia Soil and Water Conservation Commission, 1985 FIGURE C-15 Teporary Sediment Basin 9-1-99 Urban Drainage and Flood Control District C-47 3, ROUGHENING (RGHN) This technique uses the horizontal grooves created by tracks of construction equipment to reduce runoff flow velocities. Tracks are established on the slopes perpendicular to water flow. Limitations: - Not for use on rocky slopes - May cause soil compaction which limits vegetation re -growth - Roughening may have to be re-established if lost due to heavy sheet flow runoff installation: - Operate tracked equipment in a direction parallel to water flow as so to create tracks perpendicular to water flow Construction Activity: Access Roads, Well/Tank Battery Pads, and Flow/Gathering Pipelines 1r•`tfifAl .� . ow. HORIZONTAL GROOVES • CREATED BY TRACKS ►ti:�` 4uai. 1 ON EQUIPMENT SLOPE '„h - >o � Y V y J1 9Ar set Source: Pennsylvania Department of Environmental Quality, 2004. 1ZAPPS Final -10.04® A-3 DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES On shallow slopes, strips of netting may be applied across the slope. Where there is a berm at the top of the slope, bring the netting over the berm and anchor it behind the berm. On steep slopes, apply strips of netting parallel to the direction of How and anchor securely. Bring nailing down to a level area before terminating the installation, horn the end under 6" and staple at. 12" intervals, Ditch.• ,5 .. •:i:::: iii ; • �f 1 ... '". AIL� 1,421-7-1 In ditches, apply netting parallel to the direction of flow, Use check slots every 15 feet. Do not join strips In the center of the ditch. From: Virginia Soil and Water Conservation Commission, 1985 FIGURE C-6 Orientation of Blankets, Netting and Matting 9-1-99 Urban Drainage and Flood Control District C-25 DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES Anchor Slot: Bury the up -channel end of the net In a 6" deep trench. Tamp the soil firmly. Staple at 12" Intervals across the net. Overlap: Overlap edges of the strips at least 4 . Staple every 3 feet down the center of the strip. JoiningStrips: Insert the new roll of net In o trench, as wt the Anchor Slot, Overlap the up -channel end of the previous roll 18" and turn the end under 6". Staple The end of the previous roll Just below the anchor slot and at the end at 12" intervals, Check Slots, On erodible soils or steep slopes, check slots should be made every 16 feet. Insert 0 fold of the net Into a 6" trench and tamp firmly, Staple at 12" Intervals across the net. Lay the net smoothy on the surface of the soil - do not stretch the net, and do not allow wrinkles. Anchoring Ends At Structures:: Place the end of the net In a 6" slot on the up -channel side of the structure, :III the trench and tamp firmly. Roll the net up the channel, Place staples at 12" Intervals abng the anchor end of the net. From: Virginia Soil and Water Conservation Commission, 1985 C-26 FIGURE C-7 Inastalation of Blankets, Netting and Matting 9-1-99 Urban Drainage and Flood Control District t. - STRAW ROI,I.S RftJST RC PIACI-1) \ ,r' .. ALONG' SLOPE CONTQIJRS �� 10'-2.5' 0-8m) \. SPACING DcerivOS ON SOIL TYPE AND .SI.0rIT St CEP SEDIVE+VT ORGANIC (IAITE7 AND N RVE .9F7:7 S ARF CAPTURED DL7d1NG THF, ROtl..,5. J"—,5" (75-125rtwr) NOTE 1. STRAW ROLL )N5TAdLATION REOLNRE5 1-J/ RAO:WWI AND .5'EC(IRf' STAKJNC £ F /HE ROLL IN I A TRENCH, 3" 5" (75—I2vmm) DE& DUG ON STRAW CJNIOUfe RUNOFF 4du5r NOT 8E ALLOWED TO RUN S " A r UNDER OR AROUND ROLL. i�L rs �: sT€ R 4, » ,LS (9"- 10' PPO -25 mm) .4" 1/ 1" X 1' .STAKE r?,.5 x ?5npm) NOT TO SCAL' DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES L. 1 STRAW BALE BARRIER Definition A temporary sediment barrier consisting of a row of entrenched and anchored straw bales. Purposes 1. To Intercept and detain small amounts of sediment from disturbed areas of limited extent in order to reduce sediment In runoff from leaving the site. 2. To decrease the velocity of sheet flows from hllisiope areas Wood or Steel Fence Post (Rebar not allowed) Binding Wire or Twine Filtered Runoff Staked and Entrenched Straw Bale Compacted Soli to Prevent Piping Sediment Laden Runoff 11 I; uu._—. ------1111M111111411 f �- 1 __ i 1 � jiff sum cin ue ' ii Side as n aeci.da protvAde u p�} i C I I1na� S e4116".0 yr r S 40ra0e2- 12" Min. !il 111 From: Virginia Soil and Water Conservation Commission, 1985 FIGURE C-12 Stew Bale Barriers From.,: Urban vrkihAc,fL et,. el Flvod Ccidi4t 1 VJ,sr c! 76'za2 r� Cr; -tar s /`1nn uR 1 Vd1 3 } ['Ay ConSAi✓..d.i+•. /'�!�} rl rn: nw� C-42 9-1-99 Urban Drainage and Flood Control District DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES 3. Wedge loose straw between 4. Backfill and compact the excavated soli. From: Virginia Soil and Water Conservation Commission, 1985 FIGURE C -12A Staw Bale Barrier Installation (O U 1DFC.7)ar Z 9-1-99 Urban Drainage and Flood Control District C-43 DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES C-44 Axl SILT FENCE INSTALLATION STEEL OR 2"x4" WOOD POST (ANCHORED TO FABRIC) NOTE: EROSION CONTROL MEASURES SHALL BE MAINTAINED UNTIL LANDSCAPING IS COMPLETED, OR AS DIRECTED BY LOCAL JURISDICTION -NTS- FABRIC MATERIAL (ACHORED IN TRENCH) 4"x4" TRENCH COMPACTED BACKFILL -FLOW 1/2H (12' MIN) SECTION -NTS• DETAIL SILT FENCE EROSION BARRIER Details provided to District by the City of Broomlleld, Colorado U 56.1) dot FIGURE C-13 Silt Fence Erosion Barrier 9-1-09 Urban Drainage and Flood Control Dlstrict 12. ROAD -SIDE DITCHES (RDSD) This technique requires constructing channels parallel to roads. The ditches convey concentrated runoff of surface water from roads and surrounding areas to a stabilized area. Limitations: - Erosion occurs within channel - Channel does not necessarily filter sediment from runoff Installation: - Excavate channel along roadside to a width and depth that can handle expected flows Slope channels so that water velocities do not cause excessive erosion Shape and level channel removing excess spoil so water can flow Vegetate or line channel with material to prevent erosion Construction Activity: Access roads ROAD RAPPS Final 6-14.04 0 Road -side Ditch PLAN VIEW N.T.S. Roadside Ditch Road•side Ditch A-12 CROSS-SECTION N.T.S. Roadside Ditch 13. TURNOUTS OR WING DITCHES (TO) These structures are extensions of road -side ditches and will effectively remove run-off water from the ditch Into well -stabilized areas. Limitations: - Gradual slopes only - Require vegetative cover or other filter at discharge point Installation: - Slope turnout gradually down from bottom of road ditch - Angle turnout at approximately 30° to road ditch - Discharge turnout into well -vegetated area or install secondary control such as rock filter or straw bales Space turnouts according to slope Construction Activities: Access roads ROAD .•rie • WELL VEGETATED `` ATED -ASA . 4; ROCK RfP•RAP re SLOPS Source: Cooperative Extension Service, 2002. RAPPS Final 5.10.040 A-13 tv 4N,# DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES OUTLET PROTECTION Definition Structurally lined aprons or other acceptable energy dissipating devices placed at the outlets of pipes or paved channel sections. Purposes To prevent scour at stormwater outlets and to minimize the potential for downstream erosion by reducing the velocity of concentrated stormwater flows. Extend Apra to height of culvert or normal channel depth, whichever Is smaller Riprap thickness on channel side slopes equal to 1.5d50 Condu or Paved Outlet Channel Concrete cradle/cut off, or standard headwall 2d u2 1.5d50 Downstream Channel End slope at 1:1 2d 40 i Granular Bedding PROFILE See Urban Storm Drainage Criteria Manual, Vol. 2, "Major Drainage", Section 5.6 for design criteria. From: Urban Drainage and Flood Control District, 1961 FIGURE C-20 Outlet Protection for a Culvert in a Channel 9-1-99 Urban Drainage and Flood Control District C-59 TYPICAL CULVERT PROFILE NO TOO DEEP NO --- TOO HIGH YES Rondbnd 2 Sand and [ mioh or protcot with riprap rm, �� ` ` ,I r ♦ �j..� 74, \Z" \ e Do not change stream bottom otcvationl TYPICAL CULVERT OUTLET 6:0 a0 a o ,..p.bgol.ir �^ •;•o o oo O 4 1 1111111111111111111111111114 4 a ° ado' • Llround Lino O • e • d �� ©� d?• D ° P • O �7'rr Yy �. 0 0 p e • " • • n • p 9 'a• p t1 Leo .0 °• -- - 0 • s • •q0 a , C7 p C pn Oe i �a • •• a•p "'00 �r,rs ' • a 0Lid "eat'$ 0• 4. 0 ,oa % 0.:a a• 0.5 in minimum 15-30 cmminimumdepth 1.2m. 0•a ,0 c so0 n rvJo e i ao From "low-Volutne Roads Engineering, Best Management Practices Field Guide," BIM and USFS. 9. ROAD SURFACE SLOPE (RDSS) This technique sheds runoff water from road surface into stabilized ditches or vegetation. Roads may be crowned, in -sloped, or out -sloped. Limitations: - Only sheds runoff collected from surface of road - May cause concentrated flows from sheet flow - Require vegetative ditches, turnouts, and/or cross -drains Installation: - Compact soil or road base material to direct runoff Crowning design directs runoff to both sides of the road requiring 2 road -side ditches lnslope design directs runoff toward the hillside and requires cross -drain installation Outslope design is most effective on moderate slopes with dense vegetative cover Construction Activity: Access roads Na glIcte Road -side Ditch CROWN C00 rede Roadside Ditch Road -side Ditch N$ ikv RAPPS F[na1 6-10-04 1NSLOPE well vegetated OUTSLOPE A-9 Chevron CHEVRON EXPLORATION & PRODUCTION CORPORATION MidContinent Business Unit Stormwater Guidance Document 2006 Stormwater Permit (SW) Introduction: The 2005 Energy Rule has incorporated an exemption for oil and gas operations, including construction activities, at oil and gas exploration, production, processing or treatment operations or transmission facilities from the requirements to obtain an NPDES permit for stormwater discharges except in very limited instances. States may still choose to regulate construction stormwater runoff from your facilities, and Alaska, Colorado, Wyoming have indicated their intention to do so. This exemptions does not apply to any violation of a Reportable Quantity (RQ) that triggers a permit need for E&P operations. This exemption encourages voluntary application of best management practices (BMPs) for construction activities associated with oil and gas field activities and operations to minimize erosion and control sediment to protect surface water quality. MCBU standards always require the use of BMPs, regardless of proximity to water Disturbances: Criteria: The criteria that will initiate the permitting process for a Stormwwater Permit (SWP) will be determined by the amount of acreage that will be disturbed and the proximity to waters of the US or state. These disturbance areas include: — Disturbed construction area — Drilling pads — Storage or staging areas — Access roads built or modified during this disturbance — Stockpile areas Right of Ways for pipelines and/or electrical distribution systems Acreage size: The acreage size noted below does not apply in all states except Alaska, Colorado, and Wyoming. There is no regulatory requirement to develop storm water plans prior to commencing operations in all other states. There is however a MCBU guideline to use best management practices (BMP) in all 8/24/2007 construction activities to insure adequate environmental safeguards are in place to prevent any storm water runoff. In Alaska, Colorado, Wyoming, the size of the disturbance will dictate the required action and the level of detail required to comply with federal and or state requirements. The acreage will fall into three categories - < 1 acre (less than one acre) - > 1 acre < 5 acres (greater than one acre and less than five acres) - > 5 acres (greater than five acres) Inspections: Inspections will be performed during, and after any construction activity in Alaska, Colorado, and Wyoming. Inspections (attached) will be documented and filed in the field office for any state and/or federal agency review. Photographs of the identified construction site will be taken prior to any disturbance. These photos will be used to compare the site for full stabilization and closure of the permit Active construction site — inspection performed every fourteen days (14) days and after a one half (1/2) inch rainfall and snowmelt event. Inspections will be performed by the Facilities Engineering group during the active construction activity. These inspections will be performed by the construction representative. Post construction - inspections performed monthly until site is 70% fully stabilized . The Operations Group will perform the inspections on the post construction site. These inspections will be performed by the lease operator or operation supervisor designated personnel. The D7i program will be used to schedule the 14 day and monthly inspections and insure full compliance with the storm water inspection requirements. DocMan can also be used in those areas that use DocMan to record all documented inspections, Storm water prevention plans, and permits. Training: Training for detailed understanding of the SWP process within MCBU can be accessed through the training coordinator. 8/24/2007 Storm Water Pollution Prevention Plan Drilling/Construction Activity Field/Project: Is this a required bi-weekly or monthly inspection? Is this inspection a result of a precipitation event (0.5" or greater? Yes No Date Yes No Date Did you do a visual inspection of access roads and construction areas? Yes No Culverts in good repair? Yes_ No Wing ditches in good condition? Yes No Roadside ditches in good condition? Yes No Row and ditch lines in good condition? Yes No Are there any signs of major erosion? Yes No Are erosion control structures (hay bales, silt fences, etc.) in good condition and functioning as designed? Yes No Final inspection - 70% stabilization achieved Yes No Recommend NOT be submitted Yes No Comments on deficiencies, needs, or required repairs, final stabilization — Signature of Inspector: Date Printed Name of Inspector: I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information is submitted, to the best of knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment or knowing violations. Signature: Date 8/24/2007 8/24/2007 STATE OF COLORADO Bill Ritter, Jr., Governor James B. Martin, Executive Director Dedicated to protecting and improving the health and environment of the people of Colorado 4300 Cherry Creek Dr. S. Denver, Colorado 80246-1530 Phone (303) 692-2000 TDD Line (303) 691-7700 Located in Glendale, Colorado http://www.cdphe.state.co.us July 30, 2007 Laboratory Services Division 8100 Lowry Blvd. Denver, Colorado 80230-6928 (303) 692-3090 Michael De Berry, Piceance Ops Mgr Chevron USA Inc, Hector E. Cavazos F.O. Box 36366 Houston, TX 77099 970/257-6005 RE: Final Permit, Colorado Discharge Permit System — Stormwater Certification No: COR -037787 Skinner Ridge Natural Gas Wells Garfield County Local Contact: George Badovinatz, Ops Super 970/257-6002 Dear Sir or Madam: Colorado Department of Public Health and Environment Enclosed please find a copy of the new permit and certification which have been re -issued to you under the Colorado Water Quality Control Act. Your old permit expired on June 30, 2007. This is a renewal to the permit, and replaces the old one. See page 2 of the Rationale (the pages in italics) for a summary of the changes to the permit. Your Certification under the permit requires that specific actions be performed at designated times. You are legally obligated to comply with all terms and conditions of the permit. Please read the permit and certification. If you have any questions please visit our website at : www.cdphe.state.co.us/wq/permitsunitfstormwater or contact Matt Czahor at (303) 692-3517. Sincerely, Kathryn Dolan Stormwater Program Coordinator Permits Unit WATER QUALITY CONTROL DIVISION ace: Regional Council of Governments Local County Health Department District Engineer, Technical Services, WQCD Permit File STATE OF COLOFADO COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT WATER QUALITY CONTROL DIVISION TELEPHONE: (303) 692-3500 CERTIFICATION TO DISCHARGE UNDER CDPS GENERAL PERMIT COR -030000 STORMWATER DISCHARGES ASSOCIATED WITH CONSTRUCTION Certification Number COR037787 This Certification to Discharge specifically authorizes: Chevron USA Inc LEGAL CONTACT: Michael De Berry, Piceance Ops Mgr Chevron USA Inc P.O. Box 36366 Houston, TX 77099 Phone # 970/257-6005 LOCAL CONTACT: George Badovinatz, Ops Super•, Phone # 970/257-6002 During the Construction Activity: Gas/Oil Field Exploration and/or Development to discharge stormwater from the facility identified as Skinner Ridge Natural Gas Wells which is located at: Tom Creek in Skinner Ridge area. Garfield County, CO Latitude 39.587, Longitude 108.341 In Garfield County to: Tom Creek Anticipated Activity begins 02/07/2005 continuing through 06/07/2006 On 3.4 acres (18.0 acres disturbed) Certification is effective: 07/01/2007 Certification Expires: 06/30/2012 Annual Fee: $245.00 (DO NOT PAY NOW — A prorated bill will be sent shortly.) 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".1)\L11(1 Om: 1- �f1-' 1!11I.1ad (1JO \\ llll'..ITiU.l�I .1011'.1\-11I.101S -1111!>I \!(I 111.1111(1.) \1Ill'I1O .111P•\\ 111,11111(.[1 \ill pun: 1i111l:1i 1 :)! Iti11d .111 lll,ul1.nl(I1(i upeJuio,) LO{): j 1 1s11711V, 13£1.1A )') .Illy 20. 2(107 Page the nater Sterni -Water \lanitgcnient Plan for this Field Permit has been re iced to reflect these changes. as \yell as additional int(urnlation requested in t]lc net' permit. N‘hich tk.)c+k elt'ect on .1u1\ I. 2007. Yours \lichael Dcl3err� Piccance Operations Manager Contact Inl(1nlation: ('he\ -roe North ;America Er.&P 7.14 11orizon Court: Suite 140 Grand Junction. CO 81 5(J6 (970) 257-6005' Potts Creek Tom Creek 6430 Geo Ridge` Rip Rap Lined Silt Trap Straw Wattle AiL6'So [e a 6% Geo Ridge *.r� • Straw Wattle Geo Ridg Straw Wattle Rip Rap Lined Silt Trap Straw Wattle Erosion Control Blanket Rip Rap Lined Silt Trap � Straw Wattle 0 Document Number or" PBSR-59825-INF-DRN-GEG-00001-2899-06-B01 ° a ■. ■ .• Geo Ridg • • k i. ■. \kGeo Ridge Silt Fence 7 r 6516 ■■ 1 i ■■■.■■ ■■. No - Nor I .1. _ ■■■■■■■■.- ■■■■■■■■s- ■ ■■■r- .■. Geotextile Lined Rip Rap Chanel • ■ ■ i■ Geo Ridge • ■ -■ ■ li 8" 1 8 - 6" STRAW GEOTEXTILE SOCK 2X2 WOOD POST Straw Wattle 1 BEST MANAGEMENT PRACTICES (BMP's) 6' MAXIMUM STRAW 1 2X2 WOOD POST TYPICAL 11 Geotextile Lined Rip Rap and Silt Trap Side Cobble v — — — — o ti ''`1�"`fes-r�'`f-'`1��-Yi��y�"SIPre.wip� dip 4. Geotextile Linin Silt trap Direction of Water Flow Document Number Geo Ridge Direction of Water Flow Diversion Berm GEOTEXTILE SOCK Straw Wattle Earthen Ridge of Compacted Soil PBSR-59825-INF-DRN-GEG-00001-2899-07-B01 T 911 2' POST (2X2 WOOD POST) @ 10=00" MAXIMUM 2'-3" Disturbed Area 3=9" IE ENDS WITH WIRE SILT FENCE FABRIC ANCHORED IN TRENCH AND STAPLED TO POST 68X6" TRENCH FLOW COMPACTED BACKFILL Silt Fence Erosion Blanket LEGEND: K K K 0 Nrital L11-, \`<!-\--,''>\', SILT FENCE DIRECTION OF FLOW SILT TRAP STRAW WATTLE SWALE EROSION CONTROL BANKET NATIVE SOIL BERM GEOTEXTILE LINED RIP RAP CHANEL SLOPE SURFACE SHALL BE SMOOTH BEFORE PLACEMENT FOR PROPER SOIL CONTACT. MINIMUM 2 INCHES OVERLAP STAPLING PATTERN AS PER MANUFACTURERS RECOMMENDATIONS. DO NOT STRETCH BLANKETS /MATTING TIGHT A• IF THERE ISA BERM AT THE TOP OF SLOPE, ANCHOR UPSLOPE OF THE BERM. ALLOW THE ROLLS TO MOLD TO ANY IRREGULARITIES. FOR SLOPES LESS THAN 3H:1 V, ROLLS MAYBE PLACED IN HORIZONTAL STRIPS. ANCHOR IN 6X8" MINIMUM TRENCH AND STAPLEAT 12 INCH INTERVALS MINIMUM 6 INCH OVERLAP STAPLE OVERLAPS MAXIMUM 5 INCH SPACING BRING MATERIAL DOWN TO A LEVEL AREA, TURN THE END UNDER 4 INCHES AND STAPLEAT 12 !NCH INTERVALS LIME, FERTILIZE, AND SEED BEFORE INSTALLATION. PLANTING OF SHRUBS, TREES, ETC. SHOULD OCCUR AFTER INSTALLATION. Drawn Br MAT DATE: 2/06/2008 CHECKED 8Y, GJM DATE: 2/06/2008 GEO JOB NO. Z899 SCALE: None APPROVED BY JW DATE: 2/06/2008 Best Management Practices (BMP)'s SKR-598-25-4 Improvements Chevron twoMidCcsntinnt/'AIcr4cca SBU Ch �•,.7rc3n North Am Trico 111110Explorcitic3n cand Production Preliminary REASON DATE DESCRPTION Geotechnical Engineering ,Group, Inc. GEOTECHNICAL & STRUCTUkAL CONSULTANTS 2308 INTERSTATE AVENUE, GRANO JUNCTION, COLORADO 81503 (970) 245-4078 • FAX (970) 245-7115 Site Name: SKR-598-25-4 Parking Area Date of Plan: February 6, 2008 Site -Specific Storm -Water Management Plan 1. Site 1 Activity Description "SKR-598.25-4 Parking Area", Dated: February 6, 2007, Job No. 2,899, Geotechnical Engineering Group Inc. Site Description 1 Location: A well pad of approximately 150, by 200 foot dimensions with an adjacent pad of 240. by 170 foot demensions, will be constructed for gas well production. The well tad is located in Section 25, of T5S, R98W of the 6' Principal Meridian UTM 4385458m N. 728321m E. site access information is provided in the master plan Site ArealDlsturbed Area: The access road location goes as follows. Take exit 62 north to DeBeque turn right at frontage road, continue for 1 3 miles. turn left on W.5 Road, continue for 1.5 miles, turn right on Roan Creek Road, continue for 13 miles to the Cowboy Chapel, turn right on Clear Creek Road, continue for 6.5 miles, turn right on Tom Creek Road. continue 1 4 miles to site Site Soils i Slopes: From surface to 1 foot of organic topsoil typically covers the site Underlying soils Consist of shale fragments, in silty clays and sandy clays matrix to varying depths and occurrences These soils are on the average. stiff to very stiff, moist and brown to explored depths. Original site slopes vary from 6h.1 v to 1 2h 1v trending downward from north to south and less steeply downward from east to west locally Receiving Waters: Storm water runoff from construction activities will potentially flow into Tom Creek which is located approximately 150 feet from the well site. Tom Creek flows into Clear Creek which is a tributary of Roan Creek, which ultimately flows into the Colorado River Existing Vegetation: Site is currently vegetated with sage brush and low grasses to varying densities Intermittent sagebrush (Artemisia tridentate) and rabbit brush (Chrysothamnus nauseosus) also are common in this area which is bordered on all sides by a pinion juniper woodland Observed noxious weeds in the area include cheatgrass (Anisanfha lector -on)) and tamarisk (lamarix ramosissima) Tamarisk is primarily confined to Clear Creek channel Weed control will be part of the ongoing site reclamation plan Description of Construction Activity: Topsoil will be excavated and stockpiled Initial Best Management Practices, (BMP)s. will be installed Install temporary (BMP)'s to control erosion during embankment and grading operations Construct general embankment earth fill and cut Excavate, grade and compact site soils Potential Sources of Storm Water Pollution: • Sediment from disturbed areas and/or construction stockpile • 011 products associated with construction vehicles (e.g-. refueling operations, engine oil teaks. etc.) • Vehicle washing for weed control • Trash and sanitary facilities Possible storm water impacts related to (hese sources are surnmanzed in Section 3 of this page Proposed Construction Sequence: (1/1-12/31/2008) • Stake site and clear vegetation • Remove and stockpile topsoil in area • Install initial storm water controls (Including stockpile) • Construct general embankment earth fill and cut • Grading soil excavation, soil compaction. final grade • Install temporary storm water controls 2. Site Map -- see Drawtna PBSR-59825-INF-DRN-GEG-00001-2899.06-B01 information included on Erosion Control Plan Drawing • Areas used for storage • Construction site boundary • Existing and new access roads • Areas and limits of ground surface disturbance • Locations and construction details of erosion • Areas of cut and fill as referenced by topography controls. (BMPs) • Surface waters including 100 -yr floodplain limits Document Number PBSR-59825-INF-DRN-GEC-00001-2899-08-B01 3. Storm•Water Management Controls - NOTE: ALL BMPs ARE SUBJECT TO MODIFLCATtON AS REQUIRED BY SITE -CONDITIONS. SITE SPECIFIC SWMP AND ASSOCIATED EROSION CONTROL DRAWING(S) WILL BE MODIFIED TO REFLECT FIELD CONFIGURATION AS SOON AS MODIFICATION IS COMPLETED. BMP INSTALLATION NARRATIVE PROVIDED AS APPENDIX OF THE MASTER PLAN. Source Occurrence Potential Storm Water Impact Distance to Surface Water Potential Runoff Concentration BMPs ni Sediment transport from construction activities Precipitation events/ wind events High (w/o BMPs) - Low (with well maintained BMPS) • 150 feet Oil products associated with transport and construction vehicles '2' Dependent of vehicle maintenance Moderate, dependent on fluid source (e g , high for vehicle refuelinglow for minor crankcase leakage) ■ 150 feet Moderate (without BMPs) - Low (with BMPs) • Straw wattles • Silt Fence • Erosion control blankets • Rip rap lined silt trap Moderate, dependent of fluid source - majority typically contained in sods • Inspect site for possible leakage • Provide designated overnight parking area for construction vehicles - check daily for leakage • Scheduled vehicle maintenance Vehicle Limited to washing for when weed control construction (not required vehicles after Nov leave the 15') '' area Trash and sanitary facilities Primarily associated with wind events or sanitary facilities servicing activities Low - water and sediment from this process contained by lined basin Low if inspection process properly implemented + 150 feet = 150 feet 1 Low - limited quantities l controlled by lined basin Low - Ilmited flud volume typically assouated with sanitary facilities Plastic lined basin with straw wattle berm or equivalent • Bear -proof trash receptacle with weekly pickup (minimum) or restnct food consumption to separate location (e.g . temporary office) • Keep site clear of general construction trash - verify during weekly inspections • Sanitary facilities - Tie -down to prevent lipping during wind events,' instruct vendor to minimize sprits 8 leaks during servicing / service frequently Seed Mix Application Specifications Specie* Thickspike Wheatgrass Western vvneatgrass Green Needlegrass Prairie Junegrass Rocky Min Penstemon Fourwing Sallbrush Variety Cr(tana Arriba Bandera in Mix 25 25 25 15 10 add on Rate (PLS' Ibiacre) Dulled Broadcast 25 50 4.0 80 25 50 02 04 06 12 10 20 S. Inspection 1 Maintenance Site inspections will be conducted in accordance with the Master SWMP (documented by Master Inspection Form) Site specific areas requiring inspection • Site perimeter and nearby areas (0 g adjacent stream channel - for possible trash) • DisturbedIre•vegeteted areas • Sod stockpiles • Vehicre wash area • Trash container l sanitary facility • BMP's 6. Site Specific Storm Water Management Plan Revisions ii} See included erosion control details 'T' Controls and response actions covered in site Spill Prevention. Control and Countermeasures (SPCC) Plan. '3' Per Garfield County guidance 4. Operational Stabilization 1 Reclamation Operational Stabilization: Once construction is completed, exterior berms and other disturbed areas will be re -vegetated with the seed mix for sites below 7,000 fl, using application rates and plant species designated on seed mix specification Shown below Any adjacent areas disturbed by construction traffic will be re -vegetated at this time. Final stabilization will be complete when areas have returned to 70 -percent of the original vegetation cover All temporary erosion control measures will then be removed. Noxious weed control will be continued on an as needed basis Reclamation: The site will be reclaimed after the end of its operational life in accordance with Garfield County Land Use Requirements. Reclamation activities will include: re- grading the site to the original contours (approximate). replacing topsoil. re -vegetation wilh appropriate seed mix: and installing and maintaining any required storm - water controls until final stabilization is achieved. These activities will be covered in a new Site -Specific SWMP Desc,pt co of Rev,sian Note Insert additional sheets as needed Initiated 1 Approved 1 by Date 7. Site Specific SWMP Administrator (only required If different from Site Administrator) Signature: Printed Name: Title: Date: Drew„ aY' MAT DATE: 2/06/2008 CHECKED B"GJM DATE: 2/06/2008 BEG J08 NO. 2,899 SCALE: None APPROVED BY DATE: 2/06✓Y008 Stormwater Management Plan SKR-598-25-4 Improvements Chevron itoMidCc ritTnnt/AIcl kci SBU Chevron Nortl-T Arrl�riccl �Exj�lorcltic n ctncj Production Preliminary REVISION DATE DESCRIPTIO+! Geotechnical �Engineering iCGmup, inc. GEOTECHM'CAL 8 STRUCTURAL CONSULTANTS 2308 INTERSTATE AVENUE, GRAND JUNCTION,COLORADO 81503 (970) 245-4078 • FAX (970) 245-7115 - CATERPILLAR' -4 Shown with Optional Equipment FEATURES • DIESEL STRENGTH All Caterpillar° gas engines are built on diesel frames which means greater service life. Caterpillar gas engines inherit more from their diesel counterparts than just strength. They are backed by the same support system recognized as one of the most sophisticated and dependable in the world. III APPLICATION FLEXIBILITY Broad operating speed range and ability to burn a wide spectrum of gaseous fuels. • LOW EMISSIONS Low emission engines are capable of NO(x) levels as low as 2.0 grams/hp-hr. Lower emissions may be achievable for selected applications. Consult your Caterpillar dealer. IndustrialGas G3516 Engine 660-1340 hp Standard and Low Emission SPECIFICATIONS V-16, 4 -Stroke -Cycle, Spark Ignited Bore—in (mm) 6 7 (170) Stroke—in (mm) 7 5 (190) Displacement—cu in (L) 4211 (69.0) Compression Ratio STD 9-1 LE 8.1 Aspiration Naturally Aspirated or Turbocharged-Aftercooled Lube Oil Capacity — gal (L) STD* 153 (580) STD** 171 (646) LE 106 (402) Jacket Water System — gal (L) Capacity w/o Radiator 53 (205) * Oil fill capacity with 21 elements **Oil fill capacity without elements • CATERPILLAR® GAS ENGINES Represent the latest technology in engine design. Engines are offered in both naturally aspirated and turbocharged/aftercooled configurations. TA is offered as standard and low emission. These different configurations offer: • High energy ignition systems for consistent firing • High efficient combustion chamber for complete burning of the fuel. • Modern component design such as deep cup, oil gallery piston. • ELECTRONIC IGNITION SYSTEM WITH DETONATION SENSITIVE TIMING The Caterpillar electronic ignition system provides optimized spark timing for all operating conditions. Timing is automatically controlled to maintain continuous detonation protection. CATERPILLAR® STANDARD EQUIPMENT Air cleaners single stage, dry, with service indicator Breather, crankcase Carburetor natural gas Cooler lubricating oil Filter lubricating oil, RH Flywheel housing SAE No. 00 Governor Woodward Ignition system Altronic III Instrument panel, RH 8 gauge panel (STD) 12 gauge panel (LE) oil pressure coolant temperature oil pressure differential intake manifold temp (TA only) pressure (LE) service meter exhaust pyrometer (LE) Lifting eyes Manifold, exhaust watercooled Pumps, gear driven aftercooler water (TA only) jacket water Rails, mounting, 10 in. Regulator, gas pressure SAE standard rotation Thermostats and housing Torsional vibration damper CONTINUOUS RATINGS (BHP) G3516 GAS INDUSTRIAL ENGINE OPTIONAL EQUIPMENT Cooling systems high temp (LE only) Exhaust fittings Muffler Power takeoffs Starting systems Tachometer Low BTU arrangements Landfill arrangements Air head for 3161 CSA ignition Air-to-air aftercooler connection Aspiration 1400 rpm 1300 rpm 1200 rpm 1100 rpm 1000 rpm 900 rpm LE -90 LE -130 STD TA -90 STD TA -130 STD NA 1340 1265 PHYSICAL FACTORS 1245 1175 1150 1085 1085 1050 660 1050 995 995 960 605 955 900 905 875 585 860 810 815 785 525 Height in (mm) Width in (mm) Length in (mm) Weight Ib (kg) LE STD TA STD NA 73.2 (1859) 73.2 (1859) 75.2 (1911) 67.1 (1703) 67.1 (1703) 61.6 (1564) 131 (3327) 131 (3327) 126.4 (3211) 17 670 (8022) 17 470 (7931) 16 400 (7446) G3516 GAS INDUSTRIAL ENGINE FUEL CONSUMPTION CATERPILLAR® LE -90 13 000 12 000 a 11 000 g 10 000 9000 8000 7000 bkW 149 298 448 597 746 895 r 1400 rpm f200 rpm 1000 rpm 900 rpm 200 400 600 800 1000 1200 bhp STD TA -90 13 000 12 000 11 000 a -2 10000 03 9000 8000 7000 bkW 149 298 448 597 746 895 \100 rpm 1000 rpm 900 rpm 200 400 600 800 1000 1200 bhp STD NA 13 000 12 000 r 11 000 S 10000 in 9000 8000 7000 bkW 149 298 448 597 746 895 1200 rpm __1000 rpm 900 rpm 200 400 600 800 1000 1200 bhp 18.3 16.9 15.5 r 14.1 12.7 11.3 9.9 LE -130 13 000 12 000 11 000 10 000 9000 8000 7000 bkW 149 298 448 597 746 895 1400 rpm 1200 rpm 1000 rpm 900 rpm 200 400 600 800 1000 1200 bhp STD TA -130 18.3 13 000 16.9 12 000 L 15.5 § 111 000 D. 14.1 n 10 000 12.7 2 m 9000 11.3 8000 9.9 7000 18.3 16.9 15.5 14.1 12.7 11.3 9.9 bkW 149 298 448 597 746 895 ✓1200 rpm 1000 rpm 900 rpm 200 400 600 800 1000 1200 bhp 18.3 16.9 15.5 14.1 12.7 11.3 9.9 18.3 16.9 15.5 14.1 '4 12.7 2 11.3 9.9 LE refers to low emission engine configuration. STD refers to standard engine configuration. 90 refers to aftercooler water inlet temperature in 90° F (32° C). 130 refers to aftercooler water inlet temperature in 130° F (54° C). All data is based on standard conditions. 77° F (25° C) 500 ft Alt. These ratings do not allow for overload capability. CATERPILLAR G3516 GAS INDUSTRIAL ENGINE GAS INDUSTRIAL ENGINE PHYSICAL FACTORS 01 02 03 LEFT SIDE VIEW Centerline of Crankshaft Centerline of Engine Rear face of Cylinder Block Jacket Water Inlet Jacket Water Outlet Aftercooler water inlet Aftercooler water outlet Fuel Inlet See general dimension drawing 114-6637 for additional Electronic Ignition System (E.I.S.) engine detail and NA information. CONDITIONS AND DEFINITIONS REAR VIEW Air Inlet Exhaust Rb Removal Distance For magneto ignition system engines see general dimension drawing 7W4452. Note: General configuration not to be used for installation. Ratings are based on SAE J1349 standard conditions of 29.61 in Hg (100 kPa) and 77° F (25° C). These ratings also apply at IS03046, DIN6271, and BS5514 standard conditions of 29.61 in Hg (100 kPa), 81° F (27° C); and API 7B -11C standard conditions of 29.38 in Hg (99 kPa), 85° F (29° C). Ratings are based on dry natural gas having a low heat value of 905 btu/ft3(35.54 MJ/N m3). Variations in altitude, temperature, and gas composition from standard conditions may require a reduction in engine horsepower. Turbocharged-aftercooled ratings apply to 5000 ft (1525 m) and 77° F (25° C). Naturally aspirated engines apply to 500 ft (150 m) and 77° F (25° C). For applications which exceed these limits, consult your Caterpillar dealer. Additional ratings may be available for specific customer requirements. Consult your Caterpillar representative for details. Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication. LEHU6163 (3-96) e1998 Caterpillar Printed in U.SA. Supersedes LEHH0572 All rights reserved. amaiF � s STATE OF COLORADO COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT AIR POLLUTION CONTROL DIVISION TELEPHONE: (303) 692-3150 CONSTRUCTION PERMIT PERMIT NO: 07GA0707 Initial Approval DATE ISSUED: Jana 29, 2008 ISSUED TO: Chevron USA, Inc. THE SOURCE TO WHICH THIS PERMIT APPLIES IS DESCRIBED AND LOCATED AS FOLLOWS: Natural Gas Compression facility, known as the 25-4 Booster Compressor #1, located in the Piceance Basin 25- 4 Well Pad NE NW Sec 25 T5S R98W, in Garfield County, Colorado. THE SPECIFIC EQUIPMENT OR ACTIVITY SUBJECT TO THIS PERMIT INCLUDES THE FOLLOWING: One (1) Caterpillar G35 I6LE, Serial No.: TBD, rated at 1219 horsepower, @ 1400 rpm, turbo-chargedfour- cycle standard lean burn natural gas fired, internal reciprocating combustion engine. This engine is used for Natural Gas Compression. This engine is equipped with air -fuel ratio control. This engine may be replaced with another engine in accordance with the temporary engine replacement provision or with another Caterpillar, G3516LE engine in accordance with the permanent replacement provision of the Alternate Operating Scenario (AOS), included in this permit as Attachment A. THIS PERMIT IS GRANTED SUBJECT TO ALL RULES AND REGULATIONS OF THE COLORADO AIR QUALITY CONTROL COMMISSION AND THE COLORADO AIR POLLUTION PREVENTION AND CONTROL ACT C.R.S. (25-7-101 et sea), TO THOSE GENERAL TERMS AND CONDITIONS INCLUDED 1N THIS DOCUMENT AND THE FOLLOWING SPECIFIC TERMS AND CONDITIONS: 1. Visible emissions shall not exceed twenty percent (20%) opacity during normal operation of the source. During periods of startup, process modification, or adjustment of control equipment visible emissions shall not exceed 30% opacity for more than six minutes in any sixty consecutive minutes. EPA Method 9 shall be used to measure opacity. (Reference: Regulation No. I, Section II.A.I. & 4.) 2. The permit number shall be marked on the subject equipment for ease of identification. (Reference: Regulation Number 3, Part B, III.E.) (State only enforceable) 3. Emissions of air pollutants shall not exceed the following limitations (as calculated in the Division's preliminary analysis): (Reference: Regulation No. 3, Part B, I1.A.4) Pollutant Annual Limit (tpy) Nitrogen Oxides 17.7 Volatile Organic Compounds 3.4 Carbon Monoxide 26.7 4. This source shall be limited to a maximum consumption rate as listed below and all other activities, operational rates and numbers of equipment as stated in the application. Annual records of the actual consumption rate shall be maintained by the applicant and made available to the Division for inspection upon request. (Reference: Regulation 3, Part B, 11.A.4) Consumption of natural gas as fuel shall not exceed 84.0 MMscf per year. AIRS ID: 045/1513/001 Page 1 of 8 Chevron USA, Inc. Permit No.07GA0707 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division Compliance with the yearly consumption limits shall be determined on a rolling twelve (12) month total, By the end of each month a new twelve-month total is calculated based on the previous twelve months' data. The permit holder shall calculate monthly consumption of natural gas and keep a compliance record on site or at a local field office with site responsibility, for Division review, A revised Air Pollutant Emission Notice (APEN) shall be tiled: (Reference: Regulation No. 3, Part A, II.C) a. Annually whenever a significant increase in emissions occurs as follows: For any criteria pollutant: For sources emitting less than 100 tons per year, a change in actual emissions of five (5) tons per year or more, above the level reported on the last APEN; or For any non -criteria reportable pollutant: If the emissions increase by 50% or five (5) tons per year, whichever is less, above the level reported on the last APEN submitted to the Division. b. Whenever there is a change in the owner or operator of any facility, process, or activity; or c. Whenever new control equipment is installed, or whenever a different type of control equipment replaces an existing type of control equipment; or d. Whenever a permit limitation must be modified; or e. No later than 30 days before the existing APEN expires. f. Within 14 calendar days of commencing operation of a permanent replacement engine under the alternative operating scenario outlined in this permit as Attachment A. The APEN shall include the specific manufacturer, model and serial number and horsepowerofthe pemtanent replacement engine, the appropriate APEN filing fee and a cover letter explaining that the permittee is exercising an alternative -operating scenario and is installing a permanent replacement engine. 6. The manufacturer serial number of the subject equipment shall be provided to the Division within one hundred and eighty days (180) after commencement of operation. (Reference: Regulation No. 3, Part B, III.E.) 7. Within one hundred and eighty days (180) after commencement of operation, compliance with the conditions contained on this permit shall be demonstrated to the Division. It is the pennittee's responsibility to self -certify compliance with the conditions. Failure to demonstrate compliance within 180 days may result in revocation of the permit. (Reference: Regulation No. 3, Part B, II.G.2). This permit shall expire if the owner or operator of the source for which this permit was issued: (1) does not commence construction/modification or operation of this source within 18 months after either, the date of issuance of this initial approval permit or the date on which such construction or activity was scheduled to commence as set forth in the permit application associated with this permit; (ii) discontinues construction fora period of eighteen months or more; (iii) does not complete construction within a reasonable time of the estimated completion date(See General Condition No. 6., Item 1.). The Division may grant extensions of the deadline per Regulation No. 3, Part B, III.F.4.b. (Reference: Regulation No. 3, Part B, 11I.F.4.) By: Joseph Salrt?iar Permit Engineer AIRS ID: 045/1513/001 By: Roland Hea, P.E. Unit Leader Page 2 of 8 Chevron USA, Inc. Permit No.07GA0707 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division Permit Histor Issuance Date Description Initial Approval This Issuance Issued to Chevron USA, Inc. AIRS ID: 04511513/001 Page 3 of 8 Chevron USA, Inc. Permit No.07GA0707 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division Notes to Permit Holder: 1) The production or raw material processing limits and emission limits contained in this permit are based on the production/processing rates requested in the permit application. These limits may be revised upon request of the permittee providing there is no exceedance of any specific emission control regulation or any ambient air quality standard. A revised air pollution emission notice (APEN) and application form must be submitted with a request for a permit revision. 2) This source is subject to the Common Provisions Regulation Part 11, Subpart E, Upset Conditions and Breakdowns. The permittee shall notify the Division of any upset condition which causes a violation of any emission limit or limits stated in this permit as soon as possible, but no later than two (2) hours after the start of the next working day, followed by written notice to the Division explaining the cause of the occurrence and that proper action has been or is being taken to correct the conditions causing said violation and to prevent such excess emission in the future. 3) The following emissions of non -criteria air pollutants (NCRPs) are estimated based upon the site -rated horsepower and requested fuel consumption information as indicated in this permit. This information is listed to inform the operator of the Division's analysis of the specific compounds. CAS Pollutant Uncontrolled Emissions (Ib/yr) Controlled Emissions (lb/yr) ' Control Reporting Threshold (Ib/yr) Reportable ? 5000 Formaldehyde 6356.3 6356.3 0.0% 50 Yes 75070 Acetaldehyde 690.1 690.1 0.0% 50 Yes 107028 Acrolein 424.3 424.3 0.0% 50 Yes 67561 Methanol 206.4 206.4 0.0% 1000 No 110543 n -Hexane 91.6 91.6 0.0% 1000 No 71432 Benzene 36.3 36.3 0.0% 50 No 108883 Toluene 33.7 33.7 0.0% 1000 No 4) The emission levels contained in this permit are based on the following emission factors: CAS S Pollutant Emission Factors lb/MMBtu - Uncontrolled G/bhp-hr Emission Factors lb/MMBtu - Controlled g/bhp-hr NOx 0.4278 1.5000 0.4278 1.5000 CO 0.6474 2.2700 0.6474 2.2700 VOC 0.0827 0.2900 0.0827 0.2900 5000 _ Formaldehyde 0.0770 0.2700 0.0770 0.2700 75070 Acetaldehyde 0.0084 0.0293 0.0084 0.0293 107028 Acrolein 0.0051 0.0180 0.0051 0.0180 67561 Methanol 0.0025 0.0088 0.0025 0.0088 110543 n -Hexane 0.0011 0.0039 0.0011 0.0039 71432 Benzene 0.0004 0.0015 0.0004 0.0015 108883 Toluene 0.0004 0.0014 0.0004 0.0014 Emission factors are based on a Brake -Specific Fuel Consumption. Factor of 7730 btu/hp-hr and a site -rated horsepower value of 1219. 5) In accordance with C.R.S. 25-7-114.1, the Air Pollutant Emission Notice (APEN) associated with this permit is valid for a term of five years. The five-year term for this APEN expires on July 29, 2012. A revised APEN shall be submitted no later than 30 days before the five-year terra expires. 6) This emission unit is classified as a: Minor Source This facility is classified as follows: AIRS ID: 045/1513/001 Page 4 of 8 Chevron USA, Inc. Permit No,07GA0707 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division Applicable Requirement Status Operating Permit Minor PSD Minor MACT 111.1 Minor MACT ZZZZ Minor AIRS ID: 045/1513/001 Page 5 of 8 Chevron USA, Inc. Permit No.07GA0707 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division GENERAL TERMS AND CONDITIONS: (IMPORTANT! READ ITEMS 5,6,7 AND 8) This permit is issued in reliance upon the accuracy and completeness of information supplied by the applicant and is conditioned upon conduct of the activity, or construction, installation and operation of the source, in accordance with this information and with representations made by the applicant or applicant's agents. It is valid only for the equipment and operations or activity specifically identified on the permit. Unless specifically stated otherwise, the general and specific conditions contained in this permit have been determined by the APCD to be necessary to assure compliance with the provisions of Section 25-7-11 4.5(7)(a), C.R.S. 3. Each and every condition of this permit is a material part hereof and is not severable. Any challenge to or appeal of, a condition hereof shall constitute a rejection of the entire permit and upon such occurrence, this permit shall be deemed denied ab initio. This permit may be revoked at any time prior to final approval by the Air Pollution Control Division (APCD) on grounds set forth in the Colorado Air Quality Control Act and regulations of the Air Quality Control Commission (AQCC), including failure to meet any express term or condition of the permit. If the Division denies a permit, conditions imposed upon a permit are contested by the applicant, or the Division revokes a permit, the applicant or owner or operator of a source may request a hearing before the AQCC for review of the Division's action. 4. This permit and any required attachments must be retained and made available for inspection upon request at the location set forth herein. With respect to a portable source that is moved to a new location, a copy of the Relocation Notice (required by law to be submitted to the APCD whenever a portable source is relocated) should be attached to this permit. The permit may be reissued to a new owner by the APCD as provided in AQCC Regulation No. 3, Part B, Section 11,13 upon a request for transfer of ownership and the submittal of a revised APEN and the required fee. 5. Issuance (initial approval) of an emission permit does not provide "final" authority for this activity or operation of this source. Final approval of the permit must be secured from the APCD in writing in accordance with the provisions of 25-7-114.5(12)(a) C.R.S. and AQCC Regulation No. 3, Part B, Section 111.0. Final approval cannot be granted until the operation or activity commences and has been verified by the APCD as conforming in all respects with the conditions of the permit. If the APCD so determines, it will provide written documentation of such final approval, which does constitute "final" authority to operate. Compliance with the permit conditions must be denrronslrafed within 180 days after commencement of operation. 6. THIS PERMIT AUTOMATICALLY EXPIRES IF you (I) do not commence construction or operation within 18 months after either the date of issuance of this permit or the date on which such construction or activity was scheduled to commence as set forth in the permit, whichever is later; (2) discontinue construction for a period of 18 months or more; or (3) do not complete construction within a reasonable time of the estimated completion date, Extensions of the expiration date may be granted by the APCD upon a showing of good cause by the permittee prior to the expiration date. 7. YOU MUST notify the APCD at least thirty days (fifteen days for portable sources) prior to commencement of the permitted operation or activity. Failure to do so is a violation of Section 25-7- 114.5(12)(a), C.R.S. and AQCC Regulation No. 3, Part B, Section 111.0.1., and can result in the revocation of the permit. You must demonstrate compliance with the permit conditions within 180 days after commencement of operation as stared in condition 5. 8. Section 25-7-114.7(2)(a), C.R.S. requires that all sources required to file an Air Pollution Emission Notice (APEN) must pay an annual fee to cover the costs of inspections and administration. If a source or activity is to be discontinued, the owner must notify the Division in writing requesting a cancellation of the permit. Upon notification, annual fee billing will terminate. 9. Violation of the terms of a permit or of the provisions of the Colorado Air Pollution Prevention and. control Act or the regulations of the AQCC may result in administrative, civil or criminal enforcement actions under Sections 25-7-1 15 (enforcement), -121 (injunctions), -122 (civil penalties), -122.1 (criminal penalties), C.R.S AIRS ID: 045/1513/001 Page 6 of8 Chevron USA, Inc. Permit No.07GA0707 initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division ATTACHMENT A I . Alternative Operating Scenarios The following Alternative Operating Scenario (AOS) for temporary and permanent engine replacement has been reviewed in accordance with the requirements of Regulation No. 3., Part A, Section IV.A, Operational Flexibility - Alternative Operating Scenarios, and Regulation No. 3, Part B, Construction Permits, and Regulation No. 3, Part D, Major Stationary Source New Source review and Prevention of Significant Deterioration, and has been found to meet all applicable substantive and procedural requirements. This permit incorporates and shall be considered a Construction Permit for any engine replacement performed in accordance with this AOS, and the permittee shall be allowed to perform such engine replacement without applying for a revision to this permit or obtaining a new Construction Permit. 1.1 Engine Replacement The following AOS is incorporated into this permit in order to deal with a compressor engine breakdown or periodic routine maintenance and repair of an existing onsite engine that requires the use of either a temporary or permanent replacement engine. "Temporary" is defined as in the same service for 90 operating days or less in any 12 month period. "Permanent" is defined as in the same service for more than 90 operating days in any 12 month period. The 90 days is the total number of days that the engine is in operation. If the engine operates only part of a day, that day counts towards the 90 day total. Note that the compliance demonstrations and any periodic monitoring required by this AOS are in addition to any compliance demonstrations or periodic monitoring required by this permit. All replacement engines are subject to all federally applicable and state -only requirements set forth in this permit (including monitoring and record keeping). Results of all tests and the associated calculations pursuant required by this AOS shall be submitted to the Division within 30 calendar days of the test. Results of all tests shall be kept on site for five (5) years and made available to the Division upon request. The permittee shall maintain a log on-site to contemporaneously record the start and stop date of any engine replacement, the manufacturer, model number, horsepower, and serial number of the engine(s) that are replaced during the term of this permit, and the manufacturer, model number, horsepower, and serial number of the replacement engine. 1,1.1. The permittee may temporarily replace the existing compressor engine that is subject to the emission limits set forth in this permit with an engine that is of the same manufacturer, model, and horsepower or a different manufacturer, model, or horsepower as the existing engine without modifying this permit, so long as the emissions from the temporary replacement engine comply with the emission Iirnitations for the existing permitted engine as determined in section 1.2. Measurement of emissions from the temporary replacement engine shall be made as set forth in section 1.2. 1.1.2. The permittee may permanently replace the existing compressor engine that is subject to the emission limits set forth in this permit with an engine that is of the same manufacturer, model and horsepower without modifying this permit so long as the emissions from the permanent replacement engine comply with the emission limitations for the existing permitted engine as determined in section 1.2. Measurement of emissions from the permanent replacement engine shall be made as set forth in section 1.2. An Air Pollutant Emissions Notice (APEN) that includes the specific manufacturer, model and serial number and horsepower of the permanent replacement engine shall be filed with the Division for the permanent replacement engine within 14 calendar days of commencing operation of the replacement engine. The APEN shall be accompanied by the appropriate APEN filing fee and a cover letter explaining that the permittee is exercising an alternative operating scenario and is installing a permanent replacement engine. AIRS ID: 045/1513/001 Page 7 of 8 Chevron USA, Inc. Permit No.07GA0707 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division This AOS cannot be used for permanent engine replacement of a grandfathered or permit exempt engine or an engine that is not subject to emission limits. The permittee shall agree to pay fees based on the normal permit processing rate for review of information submitted to the Division in regard to any permanent engine replacement. 1.2 Portable Analyzer Testing The permittee shall measure nitrogen oxide (NOx) and carbon monoxide (CO) emissions in the exhaust from the replacement engine using a portable flue gas analyzer within seven (7) calendar days of commencing operation of the replacement engine. All portable analyzer testing required by this permit shall be conducted using the Division's Portable Analyzer Monitoring Protocol (ver March 2006 or newer) as found on the Division's website at: http://www.cdphe.state.co.us/ap/down/portanalyzeproto.pdf Results of the portable analyzer tests shall be used to monitor the compliance status of this unit. For comparison with an annual or short term emission limit, the results of the tests shall be converted to a Ib/hr basis and multiplied by the allowable operating hours in the month or year (whichever applies) in order to monitor compliance. If a source is not limited in its hours of operation the test results will be multiplied by the maximum number of hours in the month or year (8760), whichever applies. lithe portable analyzer results indicate compliance with both the NOX and CO emission limitations, in the absence of credible evidence to the contrary, the source may certify that the engine is in compliance with both the NOX and CO emission limitations for the relevant time period. Subject to the provisions of C.R.S. 25-7-123.1 and in the absence of credible evidence to the contrary, if the portable analyzer results fail to demonstrate compliance with either the NOX or CO emission limitations, the engine will be considered to be out of compliance from the date of the portable analyzer test until a portable analyzer test indicates compliance with both the NOX and CO emission limitations or until the engine is taken offline. 1.3 Additional Sources The replacement of an existing engine with a new engine is viewed by the Division as the installation of a new emissions unit, not "routine replacement" of an existing unit. The AOS is therefore essentially an advanced construction permit review. The AOS cannot be used for additional new emission points for any site; an engine that is being installed as an entirely new emission point and not as part of an AOS -approved replacement of an existing onsite engine has to go through the appropriate Construction/Operating permitting process prior to installation AIRS ID: 045/1513/001 Page 8 of STATE OF COLORADO COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT AIR POLLUTION CONTROL DIVISION TELEPHONE: (303) 692-3150 CONSTRUCTION PERMIT PERMIT Nth 07GA0708 DATE ISSUED: ISSUED TO: January 29, 2008 Chevron USA, Inc. Initial Approval THE SOURCE TO WHICH THIS PERMIT APPLIES IS DESCRIBED AND LOCATED AS FOLLOWS: Natural Gas Compression facility, known as the 25-4 Booster Compressor#2, located in the Piceance Basin25- 4 Well Pad NE NW Sec 25 T5S R98W, in Garfield County, Colorado. THE SPECIFIC EQUIPMENT OR ACTIVITY SUBJECT TO THIS PERMIT INCLUDES THE FOLLOWING: One (1) Caterpillar 03516LE, Serial No.: TBD, rated at 1219 horsepower, @ 1400 rpm, turbo-chargedfour- cycle standard lean burn natural gas fired, internal reciprocating combustion engine. This engine is used for Natural Gas Compression. This engine is equipped with air -fuel ratio control. This engine may be replaced with another engine in accordance with the temporary engine replacement provision or with another Caterpillar, 03516LE engine in accordance with the permanent replacement provision of the Alternate Operating Scenario (AOS), included in this permit as Attachment A. THIS PERMIT IS GRANTED SUBJECT TO ALL RULES AND REGULATIONS OF THE COLORADO AIR QUALITY CONTROL COMMISSION AND THE COLORADO AIR POLLUTION PREVENTION AND CONTROL ACT C.R.S. (25-7-101 et sen), TO THOSE GENERAL TERMS AND CONDITIONS INCLUDED IN THIS DOCUMENT AND THE FOLLOWING SPECIFIC TERMS AND CONDITIONS: Visible emissions shall not exceed twenty percent (20%) opacity during normal operation ofthe source. During periods of startup, process modification, or adjustment of control equipment visible emissions shall not exceed 30% opacity for more than six minutes in any sixty consecutive minutes. EPA Method 9 shall be used to measure opacity. (Reference: Regulation No. 1, Section 1I.A.1. & 4.) The permit number shall be marked on the subject equipment for ease of identification. (Reference: Regulation Number 3, Part 13, III.E.) (State only enforceable) Emissions of air pollutants shall not exceed the following limitations (as calculated in the Division's preliminary analysis): (Reference: Regulation No. 3, Part B, II.A.4) Pollutant Annual Limit (tpy) Nitrogen Oxides 17.7 Volatile Organic Compounds 3.4 _ Carbon Monoxide 26,7 Th's source shall be limited to a maximum consumption rate as listed below and all other activities, operational rates and numbers of equipment as stated in the application. Annual records of the actual consumption rate shall be maintained by the applicant and made available to the Division for inspection upon request. (Reference: Regulation 3, Part B, II.A.4) Consumption of natural gas as fuel shall not exceed 84.0 MMscf per year. AIRS ID: 045/1513/002 Page 1 of 8 Chevron USA, Inc. Permit No.07GA0708 Initial Approval Colorado Department of Public Health and Environment Air Pollution. Control Division Compliance with the yearly consumption limits shall be determined on a rolling twelve (12) month total. By the end of each month a new twelve-month total is calculated based on the previous twelve months' data. The permit holder shall calculate monthly consumption of natural gas and keep a compliance record on site or at a local field office with site responsibility, for Division review. 5. A revised Air Pollutant Emission Notice (APEN) shall be filed: (Reference: Regulation No. 3, Part A, II.C) a. Annually whenever a significant increase in emissions occurs as follows: For any criteria pollutant: For sources emitting less than 100 tons per year, a change in actual emissions of five (5) tons per year or more, above the level reported on the last APEN; or For any non -criteria reportable pollutant: If the emissions increase by 50% or five (5) tons per year, whichever is less, above the level reported on the last APEN submitted to the Division. b. Whenever there is a change in the owner or operator of any facility, process, or activity; or c. Whenever new control equipment is installed, or whenever a different type of control equipmcnt replaces an existing type of control equipment; or d. Whenever a permit limitation must be modified; or e. No later than 30 days before the existing APEN expires. Within 14 calendar days of commencing operation of a permanent replacement engine under the alternative operating scenario outlined in this permit as Attachment A. The APEN shall include the specific manufacturer, model and serial number and horsepower of the permanent replacement engine, the appropriate APEN filing fee and a cover letter explaining that the permittee is exercising an alternative -operating scenario and is installing a permanent replacement engine. 6. The manufacturer serial number of the subject equipment shall be provided to the Division within one hundred and eighty days (180) after commencement of operation. (Reference: Regulation No. 3, Part B, II I.E.) 7. Within one hundred and eighty days (180) after commencement of operation, compliance with the conditions contained on this permit shall be demonstrated to the Division. It is the perrittee's responsibility to self -certify compliance with the conditions. Failure to demonstrate compliance within 180 days may result in revocation of the permit. (Reference: Regulation No. 3, Part B, II.G.2). 8. This permit shall expire if the owner or operator of the source for which this permit was issued: (i) does not commence construction/modification or operation of this source within 18 months after either, the date of issuance of this initial approval permit or the date on which such construction or activity was scheduled to commence as set forth in the permit application associated with this permit; (ii) discontinues construction for a period of eighteen months or more; (iii) does not complete construction within a reasonable time of the estimated completion date(See General Condition No. 6., Item 1.). The Division may grant extensions of the deadline per Regulation No. 3, Part B, III.F.4.b. (Reference: Regulation No. 3, Part B, 1I1.F.4.) Bv: ler Joseph Salazar Permit Engineer AIRS ID: 045/1513/002 By: Roland Hea, Unit Leader Page 2 of 8 Chevron USA, Inc. Permit No.07GA0708 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division Permit Histor Issuance Date Description Initial Approval This Issuance Issued to Chevron USA, Inc. AIRS ID: 045115131002 Page 3 of 8 Chevron USA, Inc. Permit No.07GA0708 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division Notes to Permit llolder: I) The production or raw material processing limits and emission limits contained in this permit are based on the production/processing rates requested in the permit application. These limits may be revised upon request of the permittee providing there is no exceedance of any specific emission control regulation or any ambient air quality standard. A revised air pollution emission notice (APEN) and application form must be submitted with a request for a permit revision. 2) This source is subject to the Common Provisions Regulation Part 11, Subpart E, Upset Conditions and Breakdowns. The permittee shall notify the Division of any upset condition which causes a violation of any emission limit or limits stated in this permit as soon as possible, but no later than two (2) hours after the start of the next working day, followed by written notice to the Division explaining the cause of the occurrence and that proper action has been or is being taken to correct the conditions causing said violation and to prevent such excess emission in the future. 3) The following emissions of non -criteria air pollutants (NCRPs) are estimated based upon the site -rated horsepower and requested fuel 'consumption information as indicated in this permit. This information is listed to inform the operator of the Division's analysis of the specific compounds. CAS Pollutant Uncontrolled Emissions (!b/yr) Controlled Emissions (Ib/yr) % Control Reporting Threshold (lb/yr) Reportable ? 5000 Formaldehyde 6356.3 6356.3 0.0% 50 Yes 75070 Acetaldehyde 690.1 690.1 0.0% 50 Yes 107028 Acrolein 424.3 424.3 0.0% 50 Yes 67561 Methanol 206.4 206.4 0.0% 1000 No 110543 n-l-lexane 91.6 91.6 0.0% 1000 No 71432 Benzene 36.3 36.3 0.0% 50 No 108883 Toluene 33.7 33.7 0.0% 1000 No 4) The emission levels contained in this permit are based on the following emission factors: CAS Pollutant Emission Factors Ib/MMBtu - Uncontrolled Glbhp-hr Emission Factors lb/MMBtu - Controlled g/blip-hr NOx 0.4278 1.5000 0.4278 1.5000 CO 0.6474 2.2700 0.6474 2.2700 VOC 0.0827 0.2900 0.0827 0.2900 5000 Formaldehyde 0.0770 0.2700 0.0770 0.2700 75070 Acetaldehyde 0.0084 0.0293 0.0084 0.0293 107028 Acrolein 0.0051 0.0180 0.0051 0.0180 67561 Methanol 0.0025 0.0088 00025 0.0088 110543 n -Hexane 0.0011 0.0039 0.0011 0.0039 71432 Benzene 0.0004 0.0015 0.0004 0.0015 108883 Toluene 0.0004 0.0014 0.0004 0.0014 Emission factors are based on a Brake -Specific Fuel Consumption Factor of 7730 btu/hp-hr and a site -rated horsepower value of 1219. 5) In accordance with C.R.S. 25-7-114.1, the Air Pollutant Emission Notice (APEN) associated with this permit is valid for a term of five years. The five-year term for this APEN expires on July 29, 2012. A revised APEN shall be submitted no later than 30 days before the five-year term expires. 6) This emission unit is classified as a: Minor Source This facility is classified as follows: AIRS ID: 045/1513/002 Page 4 of 8 Chevron USA, Inc. Permit No.07GA0708 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division Applicable Requirement Status Operating Permit Minor PSD Minor MACT HEI Minor MACT ZZZZ Minor AIRS ID: 045/1513/002 Page 5 of 8 Chevron USA, Inc. Permit No.07GA0708 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division GENERAL TERMS AND CONDITIONS: (IMPORTANT! READ ITEMS 5,6,7 AND 8) ] . This permit is issued in reliance upon the accuracy and completeness of information supplied by the applicant and is conditioned upon conduct of the activity, or construction, installation and operation of the source, in accordance with this information and with representations made by the applicant or applicant's agents. It is valid only for the equipment and operations or activity specifically identified on the permit. 2. Unless specifically stated otherwise, the general and specific conditions contained in this permit have been determined by the A PCD to be necessary to assure compliance with the provisions of Section 25-7-114.5(7)(a), C.R.S. 3. Each and every condition of this permit is a material part hereof and is not severable. Any challenge to or appeal of, a condition hereof shall constitute a rejection of the entire permit and upon such occurrence, this permit shall be deemed denied ab iniiio. This permit may be revoked at any time prior to final approval by the Air Pollution Control Division (APCD) on grounds set forth in the Colorado Air Quality Control Act and regulations of the Air Quality Control Commission (AQCC), including failure to meet any express term or condition of the permit, If the Division denies a permit, conditions imposed upon a permit are contested by the applicant, or the Division revokes a perrnit, the applicant or owner or operator ofa source may request a hearing before the AQCC for review of the Division's action. 4. This permit and any required attachrnents must be retained and made available for inspection upon request at the location set forth herein. With respect to a portable source that is moved to a new location, a copy of the Relocation Notice (required by law to be submitted to the APCD whenever a portable source is relocated) should be attached to this permit. The permit may be reissued to a new owner by the APCD as provided in AQCC Regulation No. 3, Part B, Section II.B upon a request for transfer of ownership and the submittal of a revised APEN and the required fee. 5. Issuance (initial approval) of an emission permit does not provide "final" authority for this activity or operation of this source. Final approval of the permit must be secured from the APCD in writing in accordance with the provisions of 25-7-1 I4.5(12)(a) C.R.S. and AQCC Regulation No. 3, Part B, Section II1.G. Final approval cannot be granted until the operation or activity commences and has been verified by the APCD as conforming in all respects with the conditions of the permit. If the APCD so determines, it will provide written documentation of such final approval, which does constitute "final" authority to operate. Compliance with the permit conditions must be demonstrated within 180 days after commencement of operation. 6. THIS PERMIT AUTOMATICALLY EXPIRES IF you (1) do not commence construction or operation within 18 months after either the date of issuance of this permit or the date on which such construction or activity was scheduled to commence as set forth in the permit, whichever is later; (2) discontinue construction for a period of 18 months or more; or (3) do not complete construction within a reasonable time of the estimated completion date. Extensions of the expiration date may be granted by the APCD upon a showing of good cause by the permittee prior to the expiration date. 7. YOU MUST notify the APCD at least thirty days (fifteen days for portable sources) prior to commencement of the permitted operation or activity. Failure to do so is a violation of Section 25-7- 114.5(12)(a), C.R.S. and AQCC Regulation No. 3, Part B, Section 11I.G.1., and can result in the revocation of the permit. Von must demonstrate compliance with the permit conditions within 180 days after conrrrrenceurent of operation as stated in condition 5. 8. Section 25-7-1 14.7(2)(a), C.R.S. requires that all sources required to file an Air Pollution Emission Notice (APEN) must pay an annual fee to cover the costs of inspections and administration. Ifa source or activity is to be discontinued, the owner must notify the Division in writing requesting a cancellation of the permit. Upon notification, annual fee billing will terminate. 9. Violation of the terms ofa permit or of the provisions of the Colorado Air Pollution Prevention and control Act or the regulations of the AQCC may result in administrative, civil or criminal enforcement actions under Sections 25-7-115 (enforcement), -121 (injunctions), -122 (civil penalties), -122.1 (criminal penalties), C.R.S AIRS ID: 045/1513/002 Page 6 of 8 Chevron USA, Inc. Permit No.07GA0708 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division ATTACHMENT A 1. Alternative Operating Scenarios The following Alternative Operating Scenario (AOS) for temporary and permanent engine replacement has been reviewed in accordance with the requirements of Regulation No. 3., Part A, Section IV.A, Operational Flexibility - Alternative Operating Scenarios, and Regulation No. 3, Part B, Construction Permits, and Regulation No. 3, Part D, Major Stationary Source New Source review and Prevention of Significant Deterioration, and has been found to meet all applicable substantive and procedural requirements. This permit incorporates and shall be considered a Construction Permit for any engine replacement performed in accordance with this AOS, and the permittee shall be allowed to perform such engine replacement without applying for a revision to this permit or obtaining a new Construction Permit. 1.1 Engine Replacement The following AOS is incorporated into this permit in order to deal with a compressor engine breakdown or periodic routine maintenance and repair of an existing onsite engine that requires the use of either a temporary or permanent replacement engine. "Temporary" is defined as in the same service for 90 operating days or less in any 12 month period. "Permanent" is defined as in the same service for more than 90 operating days in any 12 month period. The 90 days is the total number of days that the engine is in operation. If the engine operates only part of a day, that day counts towards the 90 day total. Note that the comptiance demonstrations and any periodic monitoring required by this AOS are in addition to any compliance demonstrations or periodic monitoring required by this permit. All replacement engines are subject to all federally applicable and state -only requirements set forth in this permit (including monitoring and record keeping). Results of all tests and the associated calculations pursuant required by this AOS shall be submitted to the Division within 30 calendar days of the test. Results of all tests shall be kept on site for five (5) years and made available to the Division upon request. The permittee shall maintain a log on-site to contemporaneously record the start and stop date of any engine replacement, the manufacturer, model number, horsepower, and serial number of the engine(s) that are replaced during the term of this permit, and the manufacturer, model number, horsepower, and serial number of the replacement engine. 1. I . I . The permittee may temporarily replace the existing compressor engine that is subject to the emission lirnits set forth in this permit with an engine that is of the same manufacturer, model, and horsepower or a different manufacturer, model, or horsepower as the existing engine without modifying this permit, so long as the emissions from the temporary replacement engine comply with the emission limitations for the existing permitted engine as determined in section 1.2. Measurement of emissions from the temporary replacement engine shall be made as set forth in section 1.2. 1.1.2. The permittee may permanently replace the existing compressor engine that is subject to the emission limits set forth in this permit with an engine that is of the same manufacturer, model and horsepower without modifying this permit so long as the emissions from the permanent replacement engine comply with the emission limitations for the existing permitted engine as determined in section 1.2. Measurement of emissions from the permanent replacement engine shall be made as set forth in section 1.2. An Air Pollutant Emissions Notice (APEN) that includes the specific manufacturer, model and serial number and horsepower of the permanent replacement engine shall be filed with the Division for the permanent replacement engine within 14 calendar days of commencing operation of the replacement engine. The APEN shall be accompanied by the appropriate APEN filing fee and a cover letter explaining that the permittee is exercising an alternative operating scenario and is installing a permanent replacement engine. AIRS ID: 045/1513/002 Page 7 of 8 Chevron USA, Inc. Permit No.07GA0708 Initial Approval Colorado Department of Public Health and Environment Air Pollution Control Division This AOS cannot be used for permanent engine replacement of a grandfathered or permit exempt engine or an engine that is not subject to emission limits. The permittee shall agree to pay fees based on the norntal permit processing rate for review of information submitted to the Division in regard to any permanent engine replacement. 1.2 Portable Analyzer Testing The permittee shall measure nitrogen oxide (NOx) and carbon monoxide (CO) emissions in the exhaust from the replacement engine using a portable flue gas analyzer within seven (7) calendar days of commencing operation of the replacement engine. All portable analyzer testing required by this permit shall be conducted using the Division's Portable Analyzer Monitoring Protocol (ver March 2006 or newer) as found on the Division's website at: http://www.cdphe.state,co.us/ap/down/portanalyzeproto.pdf Results of the portable analyzer tests shall be used to monitor the compliance status of this unit. For comparison with an annual or short term emission limit, the results of the tests shall be converted to a Iblhr basis and multiplied by the allowable operating hours in the month or year (whichever applies) in order to monitor compliance. if a source is not limited in its hours of operation the test results will be multiplied by the maximum number of hours in the month or year (8760), whichever applies. If the portable analyzer results indicate compliance with both the NOX and CO emission limitations, in the absence of credible evidence to the contrary, the source may certify that the engine is in compliance with both the NOX and CO emission limitations for the relevant time period. Subject to the provisions of C.R.S. 25-7-123. l and in the absence of credible evidence to the contrary, if the portable analyzer results fail to demonstrate compliance with either the NOX or CO emission limitations, the engine will be considered to be out of compliance from the date of the portable analyzer test until a portable analyzer test indicates compliance with both the NOX and CO emission limitations or until the engine is taken offline, 1.3 Additional Sources The replacement of an existing engine with a new engine is viewed by the Division as the installation of a new emissions unit, not "routine replacement" of an existing unit. The AOS is therefore essentially an advanced construction permit review. The AOS cannot be used for additional new emission points for any site; an engine that is being installed as an entirely new emission point and not as part of an AOS -approved replacement of an existing onsite engine has to go through the appropriate Construction/Operating permitting process prior to installation. AIRS ID: 045/1513/002 Page 8 of 8 CHEVRON PICEANCE BASIN NATURAL GAS DEVELOPMENT PROJECT (GARFIELD COUNTY, COLORADO) RESULTS OF A PRELIMINARY ACOUSTICAL ASSESSMENT OF THE PROJECT WHICH INCLUDES A CENTRAL PRODUCTION FACILITY AND SEVERAL NATURAL GAS WELL SITES H&K Report No. 2205 H&K Job No. 4004 Date of Report: March 13, 2008 Prepared for: Project Applicant: Submitted by: Environmental Resources Management (ERM) 6455 S Yosemite St. Ste. 900 Greenwood Village, Colorado 80111-4954 Chevron North America Exploration and Production Paul D. Kiteck, P.E. (primary author) Hoover & Keith Inc. 11391 Meadowglen, Suite D Houston, Texas 77082 Hoover & Keith Inc. Consultants in Acoustics and Noise Control Engineering 11391 Meadowglen, Suite D, Houston, TX 77082 Phone: (281) 496-9876 ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project REPORT SUMMARY Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) This report includes the results of a preliminary acoustical assessment of the Chevron Piceance Basin Natural Gas Development Project to be located primarily in Garfield County, Colorado, which includes a Central Production Facility (i.e., a natural gas gathering/transmission compressor station) along with booster compressors and several well sites that will include well drilling activities. The primary purpose of the acoustical assessment is estimate the sound attributable to project facilities that could generate noise, such as the Central Production Facility (CPF), compare the results of the acoustical assessment to applicable sound criteria and assess the potential noise impact of the project facilities. In addition, a limited amount of ambient sound tests were conducted at the project site, and based on the measured ambient sound data, the ambient sound levels for the area surrounding the project are 25 dBA to 35 dBA (typical ambient A -wt. sound level of 30 dBA). At a distance of 1 mile south of the facility (in the area of the canyon, along Clear Creek Road), the estimated sound contribution of the CPF during operation is 35 dBA. Consequently, at the closest occupied residences to the CPF (i.e., homes at the intersection of Clear Creek Road & CR -204, approx. 6 miles south of the CPF), the noise attributable to the CPF should be significantly lower than the typical ambient sound level (e.g., 30 dBA), and therefore, the noise of the CPF should not be audible at the closest residences to the CPF. The estimated sound contribution of the CPF during operation at the closest "non -Chevron" property of potential noise concern (i.e., Colorado Nature Ranch; closest property line located approx. 4,000 feet west of the CPF) is 26 dBA, which is equal to or lower than the ambient sound level for this area. Consequently, the "potential noise increase" of the ambient noise level at the closest non - Chevron property (i.e., Colorado Nature Ranch) during full load operation of the CPF should be less than 3 dB. As a result, the noise of the CPF may be slightly perceivable/audible at areas of the Colorado Nature Ranch that are closest to the CPF but the noise of the CPF should have minimum noise impact. In regard to the Colorado 011 and Gas Conservation Committee (COGCC) Rules and Regulations, the results of the acoustical assessment indicates that the noise attributable to the project facilities (e.g., noise generated by the CPF and other noise -generating facilities) should be well below the maximum permissible levels specified in the COGCC Rules and Regulations for this type of facility. For reference, it is anticipated that any other facilities associated with the project, such as the operation of booster compressors in the project area and/or well drilling operations on well pads, will generate lower sound levels than the CPF during full Toad operation. -Page i- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project TABLE OF CONTENTS Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) Paae 1.0 INTRODUCTION 1 2.0 BRIEF DESCRIPTION OF THE SITE AND FACILITIES 1 3.0 SOUND CRITERIA, TYPICAL METRICS AND TERMINOLOGY 2 4.0 MEASUREMENT RESULTS, OBSERVATIONS AND METHODOLOGY 3 4.1 Measurement Equipment and Data Acquisition 3 4.2 Summary of the Measured Ambient Sound Levels and Observations 3 5.0 ACOUSTICAL ANALYSIS (CPF) 4 6.0 SUMMARY OF NOISE CONTROLS AND/OR EQUIPMENT NOISE LEVELS 6 6.1 Building Enclosing the Engines/Compressors 6 6.2 JW Cooler for Each Gas Compressor Unit 6 6.3 Turbine and Generator for the Gen -Set 6 6.4 Exhaust of the Gen -Set Turbine 6 6.5 Engine Exhaust and Engine Air Intake 6 7.0 SUMMARY AND FINAL COMMENT 7 APPENDIX: FIGURES, SOUND DATA, RESULTS OF ANALYSIS, DESCRIPTION OF ANALYSIS METHODOLOGY, SOURCE OF SOUND DATA, COGCC REGULATIONS, TERMINOLOGY 8-23 Figure 1: "Overview" of Project Area, Areas of Interest & Sound Measurement Positions 9 Figure 2: "Closer" View of Area around CPF and Sound Measurement Positions 10 Figure 3: Conceptual Layout of Buildings and Equipment for the CPF 11 Description of the Analysis Methodology and Source of Data 12-13 Table A: Est'd Sound Contribution of the CPF during Operation at 1/2 Mile 14 Table B: Est'd Sound Contribution of the CPF during Operation at 1 Mile 15 Table C: Est'd Sound Contribution of the CPF at the Colorado Nature Ranch 15 COGCC Noise Requirements (800 Series of the Rules and Regulations) 16-17 Summary of Metrics for Regulating Environmental Noise and Acoustical Terminology 19-22 -Page ii- ERM -- Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project 1.0 INTRODUCTION Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) In this report, we include the results of a preliminary acoustical assessment of the Chevron Piceance Basin Natural Gas Development Project to be located primarily in Garfield County, Colorado. In addition, a limited amount of ambient sound tests were conducted at the project site and a summary of the ambient sound tests are included. The primary purpose of the acoustical assessment is estimate the sound attributable to project facilities that could generate noise, compare the results of the acoustical assessment to applicable sound criteria and assess the potential noise impact of the project facilities. 2.0 BRIEF DESCRIPTION OF THE SITE AND FACILITES Figure 1 (Appendix, p. 9) shows an "overview" of the project area showing the general location of project facilities, location of the ambient sound measurement positions and other areas of interest. Figure 2 (Appendix, p. 10) shows a "closer view" of the primary project facilities (e.g., CPF and nearby well sites) and location of ambient sound measurement positions around the area of the CPF. The project is located primarily in Garfield County, Colorado, in the area of the Piceance Basin (CO), approximately 16 miles NNW of DeBeque (CO). The land around the project is mostly rough terrain/mountains with activities related to the gas exploration/transmission in the area, and property for the project/area that is owned by Chevron is relatively large. In summary, the project includes a Central Production Facility (CPF), which is a natural gas gathering/transmission compressor station, booster compressors and several well sites that will include well drilling activities. The closest residences and other potentially noise -sensitive areas (e.g., Cowboy Chapel) not located on Chevron property are approximately 6 miles south the CPF (Le., near the intersection of Clear Creek Rd. with CR -204). There are also a couple houses on the Chevron property located along Clear Creek Road. The closest non -Chevron property of potential noise concern is the area of the Colorado Nature Ranch, for which its closest property line is approximately 4,000 feet west of the CPF. Figure 3 (Appendix, p. 11) shows the current preliminary layout of buildings/equipment for the CPF. A total of four (4) engine -driven compressor units will be initially employed at the CPF for natural gas gathering/transmission. Each compressor unit will consist of a Caterpillar (CAT) Model G3520 engine driving a "high-speed" reciprocating gas compressor. The engines and compressors for gas compressor units will be enclosed in an insulated metal building (i.e., Compressor Building). The following describes auxiliary equipment and other notable equipment at the CPF: -Page 1- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) ➢ Outdoor engine jacket -water (JW) air-cooled heat exchanger (i.e., JW cooler) for each main gas compressor, each JW cooler is designed a vertical fan that are direct -driven by the engine (i.e., via belts/sheaves), and the JW cooler will also function as a gas aftercooler; ➢ Exhaust engine system designed with an exhaust muffler system; ➢ Engine air intakes, which include an air filter/cleaner system; • Aboveground gas piping and piping system components (e.g., inlet separators, fuel gas scrubber, intermediate separator) along with other miscellaneous equipment. • One (1) Solar turbine -driven generator and the turbine/generator for the gen-set to be installed inside a skid -mounted Solar acoustical enclosure. ➢ Turbine exhaust for each gen-set will include an exhaust muffler. There also will be a need to utilize booster compressor units (i.e., "smaller" engine -driven compressor units) at or near some of the planned well sites. We understand that these booster compressor units will each be designed with a skid -mounted acoustical enclosure covering the engine -compressor for each package, and each package will include an outdoor engine JW/utility cooler designed with a vertical fan that is direct -driven by the engine (i.e., via belts/sheaves). 3.0 SOUND CRITERIA, TYPICAL METRICS AND TERMINOLOGY The Colorado Oil and Gas Conservation Committee (COGCC) regulate the oil and gas drilling and production industry in the State of Colorado and the mission of the COGCC is to promote the responsible development of Colorado's oil and gas natural resources. The COGCC has the responsibility for regulating noise from natural gas facilities in Colorado, and Series 800 (i.e., "Aesthetic and Noise Control Regulations"; Section 801 and Section 802) of the COGCC Rules and Regulations address noise requirements (i.e., maximum allowable noise levels) for natural gas facilities in the State of Colorado. The complete noise regulations given in the COGCC Rules and Regulations are provided toward the end of the report (Appendix, pp. 16-17). The following summarizes our interpretation of the noise requirements of the COGCC Rules and Regulations as it applies to this project and the noise generated during operation of the CPF and other project facilities (e.g., booster compressors or well drilling activities): ➢ In remote locations, where there is no reasonably proximate occupied structure or designated outside activity area, similar to the area surrounding the site of the CPF or booster compressor(s) for this project, the light industrial standard may be applicable. Consequently, to comply with the COGCC noise regulations, it is assumed that the noise radiated at the Chevron property line should not exceed a nighttime level of 65 dBA (i.e., between 7:00 PM to the next 7:00 AM), and at the property line of any residential -zoned area (e.g., closest residences), the noise generated by the CPF or booster compressors should not exceed a nighttime sound level of 50 dBA (i.e., between 7:00 PM to the next 7:00 AM). -Page 2- ERM - Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03113/08) In addition, if the intruding noise (e.g., noise of CPF during operation) causes less than a 3 dB increase in the overall ambient noise at nearby NSAs (i.e., defined as "potential noise increase"), the noise should be barely audible/perceivable by the human ear and should have minimum noise impact on the acoustical environment. If the intruding noise causes an increase in the overall ambient noise of between 4 dB and 9 dB, the intruding noise may be audible by the human ear but should still have minimum noise impact on the acoustical environment. For the reader's information, a summary of applicable acoustical terminology in this report and typical metrics used to measure and regulate environmental noise is provided at the end of the report (Appendix, pp. 19 - 22). 4.0 MEASUREMENT RESULTS, OBSERVATIONS AND METHODOLOGY 4.1 Measurement Equipment and Data Acquisition A limited amount of ambient sound measurements at the project site were performed by Paul Kiteck of H&K during our site visit in the daytime January 29, 2008. At each sound measurement position, the equivalent A -wt. sound level (i.e., Leq) and unweighted octave -band (O.B.) sound pressure levels (i.e., SPLs) were measured at 5 feet above ground. Sound measurements attempted to exclude "extraneous sound" such as cars or trucks passing immediately by the sound measurement location or other intermittent sources not typical of the ambient noise environment. The sound measurement system consisted of a Larson -Davis (LD) Model 2900 Real Time Analyzer/Sound Level Meter (a Type I SLM per ANSI Standard S1.4 & S1.11) and a 1/2 -in. condenser microphone with windscreen (analyzer/SLM calibrated with a LD Model CA250- 0493 microphone calibrator that was calibrated within 1 year of the service date). 4.2 Summary of the Measured Ambient Sound Levels and Observations The following Table 1 summarizes the measured/reported ambient daytime A -wt. sound levels (Le., Leq) and some the sound measurement positions were taken relatively close to existing well drilling activities. Note that the ambient daytime Leq (i.e., also referred to as Ld) assumed to be similar to or equal to the ambient nighttime A -wt. sound levels (Le., Ln). Meas. Pos. Description of Sound Measurement Location Range of Meas'd Daytime A -Wt. Sound Levels (i.e., Ld) Pos. 1 Area of a house on Chevron Property, located along Clear Creek Road. 26 to 35 dBA Pos. 2 Area near the location of the CPF, along Toms Creek Road 28 to 32 dBA Pos. 3 Along Clear Creek Rd, 600 feet east of well drilling operations at Well 598 -35 -AV 46 to 48 dBA* Pos. 4 Approximately 250 feet south of well drilling operations at Well 598 -26 -AV 60 to 61 dBA* Pos. 5 Approximately 300 feet south of well drilling operations at Well 598 -35 -AV 58 to 59 dBA* Table 1: Summary of the Meas'd Daytime A -Wt. Sound Levels at Areas of Interest for the Project *Noise of the well drilling operations (i.e., drilling rig at the well site) was the dominate noise source. -Page 3- ERM - Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) During the site visit on Jan. 29 ('08), the meteorological conditions were as follows: Temperature of 23 - 27 deg. F., mostly clear sky and there was a light wind primarily from the north. During the daytime sound tests at the ambient sound measurement positions not located near well drilling activities (i.e., Pos. 1 & Pos. 2), the audible noise sources that contributed to the ambient noise included distant construction equipment, the sound of birds, the sound of wind blowing in the trees/grass and at times, the noise of distant aircraft. We believe that the measured ambient sound data at Meas. Pos. 1 and Meas. Pos. 2 represents the typically daytime and nighttime A - wt. sound levels for the area during times of relatively low wind conditions. At measurement positions located relatively close to well drilling activities (i.e., Pos. 3, Pos. 4 & Pos. 5), the noise of the well drilling operations (i.e., drilling rig) was the dominant noise source. In summary, based on the measured sound data at the site, the typical ambient sound levels for the area surrounding the project are 25 dBA to 35 dBA, with a typical ambient A -wt. sound level of 30 dBA. Consequently, if the resulting/predicted sound level contribution due to the operation of project facilities is equal to or less than the typical ambient level (e.g., 30 dBA); the noise of the CPF and other project facilities will probably not be audible. 5.0 ACOUSTICAL ANALYSIS (CPF) The noise associated with the CPF during full load operation is considered the primary facility for the project that could generate significant noise. In addition, the noise of booster compressors during operation and well drilling activities could generate noise, but it is anticipated that other project facilities, such as booster compressors and well drilling activities, will generate lower sound levels than the noise associated with the CPF during operation. The estimated sound contribution of the CPF assumes the operation of 3 gas compressor units and 2 gen-sets. The acoustical analysis of the CPF considers the noise produced by all continuous -operating equipment that typically would operate at the facility. The following stationary noise sources associated with the CPF were considered significant: • Noise generated by the engines/compressors that penetrates the Compressor Building; • Noise of the engine exhaust of each gas compressor unit; D Noise radiated from aboveground gas piping and associated components; D Noise of the outdoor JW cooler for each gas compressor unit; D Noise associated with the turbine exhaust of each gen-set (includes an exhaust muffler); • Noise of the turbine/generator that radiates from the generator skid -mounted enclosure. For this acoustical analysis, we estimated the sound contribution of the CPF at different distances (e.g., noise contribution at 1/2 mile and 1 mile south of the CPF, along the canyon, from the site) and at the closest area to the CPF of potential noise concern (i.e., Colorado Nature Ranch). A detailed description of the methodology for the acoustical analysis and the source of sound data for the CPF acoustical assessment are provided in the Appendix (pp. 12-13). -Page 4- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) Table A (Appendix, p. 14) shows the spreadsheet calculation of the estimated A -wt. sound level and unweighted O.B. SPLs at the a distance of approximately 1/2 mile south of the CPF (along the canyon) as contributed by the CPF noise sources based on standard day conditions (i.e., no wind, 60 deg. F., 70% R.H.) along with the estimated total noise of the CPF (i.e., noise of the CPF plus the typical ambient noise). The analysis includes the effect of anticipated noise control measures for the facility equipment. Table B (Appendix, p. 15) is the spreadsheet calculation of the estimated A -wt. sound level and unweighted O.B. SPLs generated by the CPF at the distance of approximately 1 mile south of the CPF (along the canyon) as extrapolated from the estimated sound contribution at 1/2 mile (i.e., results in Table A). Table C (Appendix, p. 15) is the spreadsheet calculation of the estimated A -wt. sound level and unweighted O.B. SPLs generated by the CPF at the closest property line of the Colorado Nature Ranch (i.e., approximately 4,000 feet west of the CPF) as extrapolated from the estimated sound contribution at 1/2 mile (i.e., results in Table A), noting that the Colorado Nature Ranch is considered the closest non -Chevron area of potential noise concern. The following Table 2 summarizes the calculated/estimated A -wt. sound levels of the CPF assuming operation of 3 CAT engine -driven reciprocating compressor units and other continuous -operating equipment at the CPF. Facility Operating Condition and Description of the Location Est'd A -Wt. Sound Level Contribution of the CPF Est'd sound contribution of CPF during operation at% mile from site center (along canyon) 43 dBA Est'd sound contribution of the CPF during operation at 1 mile from site center (along canyon) 35 dBA Est'd sound contribution of CPF al CO Nature Ranch (closest properly line 4,000' west of CPF) 26 dBA Table 2: Est'd A -Wt. Sound Level of the CPF at Several Distances and at the Closest Area to the CPF of Potential Noise Concern (i.e., Colorado Nature Ranch). -Page 5- ERM - Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) 6.0 SUMMARY OF NOISE CONTROL AND/OR EQUIPMENT NOISE LEVELS FOR PROJECT The following section provides a summary of anticipated noise control measures and equipment noise levels associated with the CPF equipment along with other assumptions or recommendations that may affect the noise generated by the CPF during operation. 6.1 Building Enclosing the Engines/Compressors Noise control measures will be applied to the building (Compressor Building) enclosing the engines and compressors rather than to the equipment themselves. The following describes specific requirements and other items related to the building components. ➢ The walls/roof will be constructed with an exterior metal skin, and it is recommended as a minimum, employ 24 -gauge metal. Building interior surfaces will be covered with insulation, and it is recommended as a minimum, 6 -inch thick "high-density" mineral wool (6.0-8.0 pcf uniform density), covered with a perforated liner. 6.2 JW Cooler for Each Gas Compressor Unit Based on sound tests by H&K of the JW cooler for the gas compressor unit, the A -wt. sound level is approximately 72-74 dBA at a distance of 50 feet. 6.3 Turbine and Generator for the Gen -Set The turbine and associated generator for each gen-set will be installed in a Solar acoustical skid - mounted enclosure, typically designed to achieve an A -wt. sound level of approximately 85 dBA at 3 feet from the enclosure during operation of the gen-set. 6.4 Exhaust of the Gen -Set Turbine The muffler for the turbine exhaust associated with the gen-set will be a Solar Model AX -5530 dissipative -type muffler with an overall length of 228 inches (i.e., 19 feet, from ground to stack exhaust flange) and diameter of 72 inches (i.e., 6 feet). 6.5 Engine Air Intake and Engine Exhaust The engine exhaust for each gas compressor unit will include a "residential -grade" muffler, and the engine air intake(s) for each gas compressor unit with include a "standard" air filter. -Page 6- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project 7.0 SUMMARY AND FINAL COMMENT Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) At a distance of 1 mile south of the facility (in the area of the canyon, along Clear Creek Road), the estimated sound contribution of the CPF during operation is 35 dBA. Consequently, at the closest occupied residences to the CPF (i.e., homes at the intersection of Clear Creek Road & CR -204, approx. 6 miles south of the CPF), the noise attributable to the CPF should be significantly lower than the typical ambient sound level (e.g., 30 dBA), and therefore, the noise of the CPF should not be audible at the closest residences. The estimated sound contribution of the CPF during operation at the closest "non -Chevron" property of potential noise concern (i.e., Colorado Nature Ranch; closest property line located approx. 4,000 feet west of the CPF) is 26 dBA, which is equal to or lower than the ambient sound level for this area. Consequently, the "potential noise increase" of the ambient noise level at the closest non -Chevron property (i.e., Colorado Nature Ranch) during operation of the CPF should be less than 3 dB. As a result, the noise of the CPF may be slightly perceivable at areas of the Colorado Nature Ranch that are closest to the CPF but the noise of the CPF should have minimum noise impact. For reference, it is anticipated that any other facilities associated with the project, such as the operation of booster compressors in the project area and/or well drilling operations on well pads, will generate lower sound levels than the CPF during full Toad operation. In regard to the COGCC Rules and Regulations, the results of the acoustical assessment indicates that the noise attributable to the project facilities (e.g., noise generated by the CPF and other noise -generating facilities) should be well below the maximum permissible levels specified in the COGCC Rules and Regulations for this type of facility. As a final comment, to insure that the project facilities generate minimum noise impact, H&K will provide review the noise -related equipment submittals and other design features (e.g., Compressor Building design) during the detailed design phase for the project. File: tProjW ord\ERM\Chevron Piceance ProjechReport — Noise Assessment for Chevron Piceancce Development Project.doc -Page 7- Document Number PBSR-59825-INF-SR V-GEG-00009-2899-03-BO1 `.„,r-- 7/ 0 / ✓//f, 7 i D,4.. DATE 8V MAT 2/06/2008 CHECKED ®Y GJM DATE: 2/06/2006 QEQ JOB NO. 2,899 SCALE: 1 Inch = 100 Feet APPROVED BV JW DATE: 2/06/2008 Existing Topography SKR-598-25-4 improvement Chevron AidCc ntin nt�Alasl�a SBU Chevron North America Exploration and Production Preliminary REVISION DATE DESCR!PTXIN Geotechnical 2308 INTERSTATE AVENUE, engineering GRAND JUNCTION, COLORADO 81503 (970) 2454078 • FAX (970) 245-7115 �Graup, Inc. GEOTECHNICAL & STRUCTURAL CONSULTANTS ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project APPENDIX Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) > FIGURE 1: OVERVIEW LAYOUT AROUND THE PROJECT SITE, AREAS OF INTEREST AND SOUND MEASUREMENT POSITIONS > FIGURE 2: CLOSER AREA LAYOUT AROUND THE PROJECT SITE/CPF AND AMBIENT SOUND MEASUREMENT POSITIONS > FIGURE 3: CONCEPTUAL LAYOUT OF BUILDINGS & EQUIPMENT FOR THE CPF > ANALYSIS METHODOLOGY (NOISE ATTRIBUTABLE TO THE CPF) AND THE SOURCE OF SOUND DATA > ACOUSTICAL ANALYSIS (CFP) > COLORADO OIL & GAS CONSERVATION COMMISSION (COGCC) NOISE REGULATIONS (800 SERIES OF THE RULES AND REGULATIONS) > SUMMARY OF TYPICAL METRICS FOR REGULATING ENVIRONMENT NOISE AND ACOUSTICAL TERMINOLOGY -Page 8- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project POS. 3 WELL SITE 1598-35 WITH BOOSTER (COMPRESSOR WELL SITE WELL SITE 598-25 WITH 598-25- V BOOSTER - AREA OF 'COMPRESSOR BOOSTER PARCEL ' � COMPRESSOR BOUNDARY CLEAR _ CREEK RD. (CR -211) BOUNDARY WITH COLORADO NATURE ~� RANCH WELL SITE 598 -25 -BV WELL SITE 588 -25 -CV TOM CREEK RD. POS. 2 / CENTRAL / I PRODUCTION FACILITY (CPF) WELL SITE COLORADO NATURE' `J� I� 36-1 RANCH BOUNDARY APPROX.4,000' L�1_-_� FROM CPE LEGEND - NON-RESIDENTIAL BUILDING - HOUSE OR MOBILE HOME NSA- NOISE SENSITIVE AREA - MEASUREMENT POSITION - WELL SITE APPROXIMATE SCALE IN FEET 0 2700 5400 10800 trr SHINER D RIDGE HINER GATE r (TEMPORARY Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) 1 SHINER RIDGE --111.- HOUSE - - HOUSE ON CHEVRON PROPERTY CLEAR CREEK OFFICE) CLEAR --- CREEK RD. (CR -211) SHINER ( POS. 1 RIDGE HOUSE ON CHEVRON PROPERTY ' �)/C 11 SHINER r, 1 { f RIpGE-'� r 1 / --4- L CREEKEAR RD. J} r ICR-211 ). COWBOY l� �, __ OTHER _----110.--•CHAPEL i 'J `---- HOMES ------r.... ROAN -`--- -- ROAN ROAN CREEK CREEK RD. (CR -204) ROAN CREEK RD. (CR -204) CLEAR CREEK CLOSEST RESIDENCES NOT ON CHEVRON PROPERTY Figure 1: Chevron Piceance Development Project: "Overview" Layout Showing the Project Facilities, Other Areas of Interest and Ambient Sound Measurement Positions. -Page 9- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project WELL SITE 598-26 WITH BOOSTER COMPRESSORi POS. 4 (250' FROM WELL DRILLING RIG --- 7 DURING OPERATION) \ WELL SITE 598-35 WITH BOOSTER COMPRESSOR PARCEL BOUNDARY CLEAR CREEK RD. -- (CR -211) POS. 3 POS. 5 (300' FROM WELL DRILLING RIG DURING OPERATION) BOUNDARY WITH COLORADO NATURE RANCH COLORADO NATURE RANCH BOUNDARY APPROX. 4.003' FROM CPF LEGEND - NON-RESIDENTIAL BUILDING I+�+ - HOUSE OR MOBILE HOME NSA- NOISE SENSITIVE AREA - MEASUREMENT POSITION - WELL SITE APPROXIMATE SCALE IN FEET 0 1100 2200 4400 i% Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) WELL SITE 598 -25 -AV T` AREA OF BOOSTER COMPRESSOR WELL SITE 598 -25 -BV � I WELL SITE 598 -25 -CV TOM CREEK RD. POS. 2 CENTRAL PRODUCTION J/ FACILITY (CPF) WELL SITE 36-1 SHINER RIDGE Figure 2: Chevron Piceance Development Project: "Closer" Area View of Project Facilities and Area(s) of Interest and Sound Measurement Positions in the Area of the CPF. -Page 10 - ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project WAREHOUSE BUILDING CLEAR CREEK RD. (CR -211) VJ ELECTRICAL BUILDING ELECTRICAL COMMUNICATIONS SUSTATION BUILDING CONTROL w -v— BUILDING DIESEL GEN. INSTR AIR SKID LIQUID SEPARATOR TURBINE -DRIVEN GEN -SET GAS SEPARATOR GLYCOL TOWER Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) TOM CREEK RD. PUMPS COND. LOADING t SKID TRUE NORTH i ti N i 0 0 0 � DIKE VRU r GAS FILTER SEPARATOR FUEL GAS SKID PIPE RACK #1 #2 #3 #d FLARE SCRUBBER PUMP SKID PIPE RACK GLYCOL REBOILER 1 SURGE COMPRESSOR SKID BUILDING WITH ENGINE DRIVEN COMPRESSOR UNITS FENCELINE I�. t - CENTRAL APPROXIMATE SCALE IN FEET PRODUCTION FACILITY (CPF) 0 35 70 140 Figure 3: Chevron Piceance Development Project: Conceptual Layout of the Buildings and Equipment at the Central Production Facility (CPF). -Page 11- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project ANALYSIS METHODOLOGY {NOISE ATTRIBUTABLE TO CPF) Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) In general, the predicted sound level contributed by the CPF equipment was calculated as a function of frequency from estimated unweighted octave -band (O.B.) sound power levels (PWLs) for each significant sound source. The following summarizes the acoustical analysis procedure for the Station: • Initially, unweighted O.B. PWL values of the significant noise sources were determined from equipment manufacturer's sound data and/or actual sound level measurements performed by H&K at similar type of equipment/components expected for this gas compressor facility. D Then, expected noise reduction (NR) or attenuation in dB per O.B. frequency due to any noise control measures, hemispherical sound propagation (discussed in more detail below*) and atmospheric sound absorption (discussed in more detail below**) were subtracted from the unweighted octave - band PWLs to obtain the unweighted O.B. SPLs of each noise source. Since sound shielding by buildings can influence the sound level contributed at the NSAs, we also included the sound shielding due to buildings, if appropriate. The sound attenuation effect due to foliage or land contour was not considered in the analysis although there probably will be some attenuation due to foliage/trees. D Finally, the resulting estimated unweighted O.B. SPLs for all noise sources associated with the Station (with noise control and other sound attenuation effects) were logarithmically summed, and the total O.B. SPLs for all noise sources were corrected for A -weighting to provide the estimated overall A -wt. sound level contributed by the Station at the closest NSA. The predicted sound contribution of the Station at the closest NSA was utilized to estimate the Station noise contribution at the other nearby NSAs that are more distant that the closest NSA. *Attenuation due to hemispherical sound propagation: Sound propagates outwards in all directions (i.e., length, width, height) from a point source, and the sound energy of a noise source decreases with increasing distance from the source. In the case of hemispherical sound propagation, the source is located on a flat continuous plane/surface (e.g., ground), and the sound radiates hemispherically (i.e., outward, over and above the surface) from the sound source. The following equation is the theoretical decrease of sound energy when determining the resulting SPL values of a noise source at a specific distance ("r") of a receiver from the estimated PWL values: Decrease in SPL ("hemispherical propagation") from a noise source = 20*Iog(r) — 2.3 dB where "r" is distance of the receiver from the noise source. **Attenuation due to air absorption: Air absorbs sound energy, and the amount of absorption ("attenuation") is dependent on the temperature and relative humidity (R.H.) of air and frequency of sound. For example, the attenuation due to air absorption for 1000 Hz O.B. SPL is approximately 1.5 dB per 1,000 feet for standard day conditions (i.e., no wind, 60 deg. F. and 70% R.H.). -Page 12- ERM - Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project SOURCE OF SOUND DATA (CPF) Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) The following describes the source of sound data used for estimating the source sound levels and/or the source PWLs for the CPF (e.g., engines/compressors and other equipment/components associated with the compressor installation). (1) Estimated PWL values of equipment inside the building (i.e., engines, compressors and other equipment inside the building) was calculated from sound data measured by H&K on a similar type of compressor installation. (2) Exhaust PWL values were calculated from field sound data measured by H&K on a similar type of engines to be utilized at this facility. The DIL values for the exhaust muffler are generally lower than the recommended values in order that the analysis incorporates a "margin of safety." (3) Noise radiated from aboveground piping is primarily a result the noise generated by the gas compressors. Consequently, measurement of both near field and far field sound data on gas piping is presumed to be an accurate method of quantifying the noise associated with the piping, and estimated PWL values for piping in the analysis were determined from near field and far field sound data by H&K on a similar type of compressor to that of the proposed compressor unit. (4) The estimated PWL values for coolers (e.g., JW/aux cooler and gas cooler) were designated to meet the design noise goal and the estimated PWL values for the cooler utilized in the acoustical analysis assumes some noise associated with piping associated with the coolers. The noise level for the cooler used in the acoustical analysis is generally higher than the sound level requirement in order that the noise design analysis incorporates an acoustical "margin of safety." In addition, there can be other noise associated with the cooler that is not directly related to the operation of the cooler fans. (5) The estimated PWL values for the engine air intake were calculated from measured sound data in the field tests by H&K on similar engine that will be employed. -Page 13- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03113108) Source No. Noise Sources and Other ConditionslFactors PWL or SPL in dB Per Octave -Band Center Frequency (Hz) A -Wt. & Dist (Ft) associated with Acoustical Analysis 315 63 125 250 500 110001 2000 4000 8000 Level 1) PWL of Engines/Compressors inside Bldg. (4 Units) 112 115 120 118 118 116 118 118 115 124 Attenuation of the Building -6 -10 -16 -20 -22 -25 -30 -32 -32 NR of any Additional Noise Mi ligation Measures 0 0 0 0 0 0 0 0 0 Misc. Atten. (e.g., Shielding or Land Contour) 0 0 0 0 0 0 0 0 0 2600 Hemispherical Radiation -66 -66 -66 -66 -66 -66 -66 -66 -66 2600 Atm. Absorption (70% R.H., 60 deg F) 0 0 -1 -1 -2 -4 -8 -20 -36 2600 Source Sound Level Contribution 40 39 37 31 28 21 14 0 0 29 2) PWL of Unsilenced Engine Exhaust (1 Unit) 120 125 132 126 124 126 126 114 100 131 PWL of Unsilenced Exhaust for 4 Units (+6 dB) 126 131 13B 132 130 132 132 120 106 137 Allen. of Noise Control (Exhaust Muffler) -16 -22 -30 -35 -38 -38 -35 -25 -20 NR of any Additional Noise Mitigation Measures 0 0 0 0 0 0 0 0 0 Misc. Allen. (e.g., Shielding or Land Contour) 0 0' 0 0 0 0 0 0 0 2600 Hemispherical Radiation -66 -66 -66 -66 -66 -66 -66 -66 -66 2600 Atm. Absorption (70% R.H., 60 deg F) 0 0 -1 -1 -2 -4 -8 -20 -36 2600 Source Sound Level Contribution 44 43 41 30 24 24 23 9 0 31 3) PWL of JW/Utility Cooler for 1 Unit 110 112 108 105 102 98 95 92 88 104 PWL of All 4 JW/Utility Coolers (+6 dB) 116 118 114 111 108 104 101 98 94 110 Atten. of Noise Control 0 0 0 0 0 0 0 0 0 NR of any Additional Noise Mitigation Measures 0 0 0 0 0 0 0 0 0 Misc. Atten. (e.g., Shielding or Land Contour) 0 0 0 0 0 0 0 0 0 2600 Hemispherical Radiation -66 -66 -66 -66 -66 -66 -66 -66 -66 2600 Alm. Absorption (70% R.H., 60 deg F) 0 0 -1 -1 -2 -4 -B -20 -36 2600 Source Sound Level Contribution 50 52 47 44 40 34 27 12 0 41 4) PWL of Unsilenced Turbine Exhaust of Gen Set (1 Uni 120 123 120 123 127 119 112 104 96 126 Atten. of Noise Control (Exhaust Muffler) -2 -5 -12 -22 -30 -30 -26 -25 -20 Misc. Atten. (e.g., Shielding or Land Contour) 0 0 0 0 0 0 0 0 0 2600 Hemispherical Radiation -66 -66 -66 -66 -66 -66 -66 -66 -66 2600 Atm. Absorption (70% R.H., 60 deg F) 0 0 -1 -2 -2 -4 -8 -20 -36 2600 Source Sound Level Contribution 52 52 41 33 29 19 10 0 0 32 5) PWL of Outdoor Gas Piping for All Compressor Units 105 104 102 100 98 95 92 90 88 101 NR of Noise Control 0 0 0 0 0 0 0 0 0 Misc. Allen. (e.g., Shielding by Compr. Bldg.) 0 0 0 0 0 0 0 0 0 2600 Hemispherical Radiation -66 -66 -66 -66 -66 -66 -66 -66 -66 2600 Atm. Absorption (70% R.H. 60 deg F) 0 0 -1 -1 -2 -4 -8 -20 -36 2600 Source Sound Level Contribution 39 38 35 33 30 25 18 4 0 31 6) PWL of Turbine -Driven Gen Set (1 Unit) 104 97 98 97 100 96 96 92 85 102 NR of any Additional Noise Mitigation Measures 0 0 0 0 0 0 0 0 0 Misc. Atten. (e.g., Shielding by Compr. Bldg.) 0 0 0 0 0 0 0 0 0 2600 Hemispherical Radiation -66 -66 -66 -66 -66 -66 -66 -66 -66 2600 Atm. Absorption (70% R.H., 60 deg F) 0 0 -1 -1 -2 -4 -8 -20 -36 2600 Source Sound Level Contribution 38 31 31 30 32 26 22 6 0 32 7) PWL of Pumps. VRUs, Coolers, Glycol Regen. Skid 105 102 98 95 92 90 88 86 85 96 NR of any Additional Noise Mi ligation Measures 0 0 0 0 0 0 0 0 0 Misc. Atten. (e.g., Shielding or Land Contour) 0 0 0 0 0 0 0 0 0 2600 Hemispherical Radiation -66 -66 -66 -66 -66 -66 -66 -66 -66 2600 Atm. Absorption (70% R.H., 60 deg F) 0 0 -1 -1 -2 -4 -8 -20 -36 2600 Source Sound Level Contribution 39 36 31 28 24 20 14 0 0 26 Est'd Total Sound Contribution of CPF at 112 mile south of Site 55 55 1 50 45 42 36 30 15 0 43.1 Typical Ambient Sound Level at this Location 30.0 Est'd Sound Level of CPF plus Ambient Level (dBA) 43.3 lEst'd Potential Increase (dB) 13.3 Table A: Chevron Piceance Central Production Facility (CPF): Est'd Sound Contribution of the CPF at Approx. 1/2 Mile south of the Site (in the Area of Canyon) assuming Operation of Four(4) Compressor Units (i.e., CAT Model G3520 Engine -Driven Compressor Units) and One (1) Solar Gen Set. NOTE: DIL, NR & PWL values on this spreadsheet analysis should not be used as the specified values. Refer to the "Noise Control & Sound Requirements" in the report or other company specifications. -Page 14- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03113/08) Source No, & Dist (Ft) Noise Sources and Other Conditions/Factors associated with Acoustical Analysis SPL in dB Per Octave -Band Center Frequency (Hz) A -Wt. Level 31.5 63 125 250 500 1000 2000 4000 8000 4000 4000 Est'd SPLs of Station at 2600 Ft. (RE: Table A) 55 55 50 45 42 36 30 15 0 43.1 5280 Hemisph Radiation [201og(528012600) = 6 dB] -6.0 -6.0 -6.0 -6.0 -6.0 -6.0 -6.0 -6.0 -6.0 5280 Atm. Absorption (70% R.N., 60 deg F) 0 0 -1 -1 -2 -4 -8 -20 -37 Est'd Total Sound Contribution of CPF at 1 mile south of Site 49 49 43 38 34 26 16 0 0 35,1 Typical Ambient Sound Level at this Location Est'd Sound Level of CPF plus Ambient Level (dBA) Est'd Potential Increase (dB) 30.0 36.3 6.3 Table B: Chevron Piceance Central Production Facility (CPF): Est'd Sound Contribution of the CPF at Approx. 1 Mile south of the Site (in the Area of Canyon) assuming Operation of Four (4) Compressor Units (i.e., CAT Model G3520 Engine -Driven Compressor Units) and One (1) Solar Gen Set. Source No. & Dist (Ft} Noise Sources and Other Conditions/Factors associated with Acoustical Analysis SPL in dB Per Octave -Band Center Frequency (Hz) A -Wt. Level 31.5 63 125 250 500 1000 2000 4000 8000 4000 4000 Estd SPLs of Station at 2600 Ft. (RE: Table A) Attenuation due to Shiner Ridge Hemisph Radiation [201og(4500t2600) = 3.7 dB] Atm. Absorption (70% R.H., 60 deg F) 55 -6 -3.7 0 55 -8 -3.7 0 50 -10 -3.7 0 45 -12 -3.7 -1 42 -14 -3.7 -1 36 -15 -3.7 -2 30 -18 -3.7 -4 15 -20 -3.7 -11 0 -20 -3.7 -19 43.1 Est'd Total Sound Contribution of the Station at NSA#3 45 43 36 29 23 15 4 0 0 26,0 Typical Ambient Sound Level at this Location ' 30.0 Est'd Sound Level of Station plus Ambient Ln (dBA) 31.5 Est'd Potential Increase (dB) 1.5 Table C: Chevron Piceance Central Production Facility (CPF): Est'd Sound Contribution of the CPF atApprox. 4,000 Ft. West of Site (CO Nature Ranch, West of Shiner Ridge) assuming Operation of Four (4) Compressor Units (i.e., CAT Model G3520 Engine -Driven Compressor Units) and One (1) Solar Gen Set. -Page 15- ERM - Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) COLORADO OIL & GAS CONSERVATION COMMISSION (COGCC) NOISE REQUIREMENTS (800 SERIES OF THE RULES AND REGULATIONS) The COGCC regulates the oil and gas drilling and production industry in the State of Colorado and the mission of the COGCC is to promote the responsible development of Colorado's oil and gas natural resources. This "responsible development" balances efficient exploration and production of oil and gas with the prevention of waste, protection of mineral owner's rights, and protection of public health, safety and welfare and the environment. In Colorado, the COGCC has the responsibility for regulating noise from oil and gas facilities. AESTHETIC AND NOISE CONTROL REGULATIONS (Rules related to Noise Regulations and Noise Abatement as of November 30, 2006) 801. INTRODUCTION The rules and regulations in this section are promulgated to control aesthetics and noise impacts during the drilling, completion and operation of oil and gas wells and production facilities. Any Colorado county, home rule or statutory city, town, territorial charter city or city and county may, by application to the Commission, seek a determination that the rules and regulations in this section, or any individual rule or regulation, shall not apply to oil and gas activities occurring within the boundaries, or any part thereof, of any Colorado county, home rule or statutory city, town, territorial charter city or city and county, such determination to be based upon a showing by any Colorado county, home rule or statutory city, town, territorial charter city or city and county that, because of conditions existing therein, the enforcement of these rules and regulations is not necessary within the boundaries of any Colorado county, home rule or statutory city, town, territorial charter city or city and county for the protection of public health, safety and welfare. 802. NOISE ABATEMENT a. The goal of this rule is to identify noise sources related to oil and gas operations that impact surrounding landowners and to implement cost-effective and technically -feasible mitigation measures to bring ()Hand gas facilities into compliance with the allowable noise levels identified in subsection c. Operators should be aware that noise control is most effectively addressed at the siting and design phase, especially with respect to centralized compression and other downstream "gas facilities" (see definition in the 100 Series of these rules). b. Oil and gas operations at any well site, production facility or gas facility, shall comply with the following maximum permissible noise levels. Operations involving pipeline or gas facility installation or maintenance, the use of a drilling rig, completion rig, workover rig, or stimulation is subject to the maximum permissible noise levels for industrial zones. The type of land use of the surrounding area shall be determined by the Commission in consultation with the local governmental designee taking into consideration any applicable zoning or other local land use designation. c. In the hours between 7:00 a.m. and the next 7:00 p.m. the noise levels permitted below may be increased ten (10) db(A) for a period not to exceed fifteen (15) minutes in any one (1) hour period. The allowable noise level for periodic, impulsive or shrill noises is reduced by five (5) db(A) from the levels shown. -Page 16- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) ZONE 7:00 am to next 7:00 pm 7:00 pm to next 7:00 am (Daytime) (Nighttime) Residential/Agricultural/Rural 55 db(A) 50 db(A) Commercial 60 db(A) 55 db(A) Light industrial 70 db(A) 65 db(A) Industrial 80 db(A) 75 db(A) In remote locations, where there is no reasonably proximate occupied structure or designated outside activity area, the Tight industrial standard may be applicable. Pursuant to Commission inspection or upon receiving a complaint from a nearby property owner or local governmental designee regarding noise related to oil and gas operations, the Commission shall conduct an onsite investigation and take sound measurements as prescribed herein. The following provide guidance for the measurement of sound levels and assignment of points of compliance for oil and gas operations: (1) Sound levels shall be measured at a distance of three hundred and fifty (350) feet from the noise source. At the request of the complainant, the sound level shall also be measured at a point beyond three hundred fifty (350) feet that the complainant believes is more representative of the noise impact. If an oil and gas well site, production facility or gas facility is installed closer than three hundred fifty (350) feet from an existing occupied structure, sound levels shall be measured at a point twenty-five (25) feet from the structure towards the noise source. Noise levels from oil and gas facilities located on surface property owned, leased or otherwise controlled by the operator shall be measured at three hundred and fifty (350) feet or at the property line, whichever is greater. In situations where measurement of noise levels at three hundred and fifty (350) feet is impractical or unrepresentative due to topography, the measurement may be taken at a lesser distance and extrapolated to a 350 -foot equivalent using the following formula: db(A)@DISTANCE 2 = db(A)@DISTANCE 1 — 20 x log10(distance 2/distance 1) (2) Sound level meters shall be equipped with wind screens, and readings taken when the wind velocity at the time and place of measurement is not more than five (5) miles per hour. (3) Sound level measurements shall be taken four (4) feet above ground level. (4) Sound levels shall be determined by averaging minute -by -minute measurements made over a minimum fifteen (15) minute sample duration if practicable. The sample shall be taken under conditions that are representative of the noise experienced by the complainant (e.g., at night, morning, evening, or during special weather conditions). (5) In all sound level measurements, the existing ambient noise level from all other sources in the encompassing environment at the time and place of such sound level measurement shall be considered to determine the contribution to the sound level by the oil and gas operation(s). -Page 17- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) d. In situations where the complaint or Commission onsite inspection indicates that low frequency noise is a component of the problem, the Commission shall obtain a sound level measurement twenty-five (25) feet from the exterior wall of the residence or occupied structure nearest to the noise source, using a noise meter calibrated to the db(C) scale. If this reading exceeds 65 db(C), the Commission shall require the operator to obtain a low frequency noise impact analysis by a qualified sound expert, including identification of any reasonable control measures available to mitigate such low frequency noise impact. Such study shall be provided to the Commission for consideration and possible action. e. Exhaust from all engines, motors, coolers and other mechanized equipment shall be vented in a direction away from all occupied buildings. f. All facilities within four hundred (400) feet of occupied buildings with engines or motors which are not electrically operated shall be equipped with quiet design mufflers or equivalent. All mufflers shall be properly installed and maintained in proper working order. ➢ For reference the following is a summary of the COGCC noise requirements as it applies to the CPF, per H&K interpretation: In remote locations, where there is no reasonably proximate occupied structure or designated outside activity area, similar to the area surrounding the site of the CPF or booster compressor(s) for this project, the light industrial standard may be applicable. Consequently, to comply with the COGCC noise regulations, it is assumed that the noise radiated at the Chevron property line should not exceed a nighttime level of 65 dBA (i.e., between 7:00 PM to the next 7:00 AM), and at the property line of any residential -zoned area (e.g., closest residences), the noise generated by the CPF or booster compressors should not exceed a nighttime sound level of 50 dBA (i.e., between 7:00 PM to the next 7:00 AM). -Page 18- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) SUMMARY OF TYPICAL METRICS FOR REGULATING ENVIRONMENTAL NOISE AND ACOUSTICAL TERMINOLOGY RELATED TO THE REPORT (1) Decibel (dB): A unit for expressing the relative power level difference between acoustical or electrical signals. It is ten times the common logarithm of the ratio of two related quantities that are proportional to power. When adding dB or dBA values, the values must be added logarithmically. For example, the logarithmic addition of 35 dB plus 35 dB is 38 dB. (2) A -Weighted Sound Level (dBA): The A -wt. sound level is a single -figure sound rating, expressed in decibels (Re 20 pPa), which correlates to the human perception of the loudness of sound. The dBA level is commonly used to measure industrial and environmental noise since it is easy to measure and provides a reasonable indication of the human annoyance value of the noise. The dBA measurement is not a good descriptor of a noise consisting of strong low -frequency components or for a noise with tonal components. The A -weighted curve approximates the response of the average ear at sound levels of 20 to 50 decibels. The following are the relative response of A -weighted filter per octave band frequency, and a graph/curve is provided below that shows a graphical representation of the A -wt. filter response per frequency (in Hz). 31.5 Hz 63 Hz 125 Hz 250 Hz 500 Hz 1,000 Hz 2,000 Hz 4,000 Hz 8,000 Hz 16,000 Hz -39.4 dB -26.2 dB -16.1 dB -8.6 dB -3.2 dB 0 dB +1.2 dB +1.0 dB -1.1 dB -6.6 dB RELATIVE RESPONSE, 1 dB I0 0 - 10 - 20 -30 - 40 -50 16 31.5 63 125 250 500 1000 2000 4000 8000 16,000 FREQUENCY, Hz -Page 19- Com'--- r' ---Jr r _�� B, C p` �. B �/ i I A 16 31.5 63 125 250 500 1000 2000 4000 8000 16,000 FREQUENCY, Hz -Page 19- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project (3) Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) C -Weighted Sound Level (dBC): The C -wt. sound level is a single -figure sound rating, expressed in decibels (Re 20 µPa), which correlates to the human perception of the loudness of sound in excess of 85 decibels. The dBC level is commonly used to measure industrial and environmental noise since it is easy to measure and provides a reasonable indication of the overall sound. The difference between C and A -weighted sound levels provides and indication of the amount of lower frequency sound energy. The following are the relative response of C -weighted filter per octave band frequency, and a graph/curve is provided that shows a graphical representation of the C -wt. filter response per frequency (in Hz), and the graph/curve above in Definition (2) shows a graphical representation of the C -wt. filter response per frequency (in Hz). 31.5 Hz 63 Hz 125 Hz 250 Hz 500 Hz 1,000 Hz 2,000 Hz 4,000 Hz 8,000 Hz 16,000 Hz -3.2 dB -1.0 dB -0.2 dB 0 dB 0 dB 0 dB -0.2 dB -0.8 dB -3.0 dB -8.5 dB (4) Background or Ambient Noise: The total noise produced by all other sources of a given environment in the vicinity of a specific source of interest, and includes any Residual Noise. (5) Human Perception of Change in Sound Level > A 3 dB change of sound level is barely perceivable by the human ear > A 5 or 6 dB change of sound level is noticeable • If sound level increases by 10 dB, it appears as if the sound intensity has doubled. (6) Sound Pressure Level (LP or SPL): Ten times the common logarithm to the base 10 of the ratio of the mean square sound pressure to the square of a reference pressure. Therefore, the sound pressure level is equal to 20 times the common logarithm of the ratio of the sound pressure to a reference pressure (20 micropascals or 0.0002 microbar). (7) Octave Band Sound Pressure Level (SPL): Sound is typically measured in frequency ranges (e.g., high-pitched sound, low-pitched sound, etc.) that provides more meaningful sound data regarding the sound character of the noise. When measuring two noise sources for comparison, it is better to measure the spectrum of each noise, such as in octave band SPL frequency ranges. Then, the relative loudness of two sounds can be compared frequency range by frequency range. As an illustration, 2 noise sources can have the same dBA rating and yet sound completely different. For example, a high-pitched sound at a frequency of 2000 Hz could have the same dBA rating as a much louder low -frequency sound at 50 Hz. (8) Daytime Sound Level (Ld) & Nighttime Sound Level (Ln): Ld is the equivalent A -weighted sound level, in decibels, for a 15 hour time period, between 07:00 to 22:00 Hours (7:00 a.m. to 10:00 p.m.). L„ is the equivalent A -weighted sound level, in decibels, for a 9 hour time period, between 22:00 to 07:00 Hours (10:00 p.m. to 7:00 a.m.). -Page 20- ERM — Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project (9) Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) Equivalent Sound Level (Leq): The equivalent sound level (Leq) can be considered an average sound level measured during a period of time, including any fluctuating sound levels during that period. In this report, the Leq is equal to the level of a steady (in time) A -weighted sound level that would be equivalent to the sampled A -weighted sound level on an energy basis for a specified measurement interval. The concept of the measuring Leq has been used broadly to relate individual and community reaction to aircraft and other environmental noises. (10) Day -Night Average Sound Level (Ldn): The Ldn is an energy average of the measured daytime Leq (Ld) and the measured nighttime Leq (Ln) plus 10 dB. The 10 -dB adjustment to the Ln is intended to compensate for nighttime sensitivity. As such, the Ldn is not a true measure of the sound level but represents a skewed average that correlates generally with past sound surveys which attempted to relate environmental sound levels with physiological reaction and physiological effects. For a steady sound source that operates continuously over a 24-hour period and controls the environmental sound level, a Ldn is approximately 6.4 dB above the measured Leq. Consequently, a Ldn of 55 dBA corresponds to an Leq of 48.6 dBA. If both the Ld and Ln are measured, then the Ldn is calculated using the following formula: Ldn =101ogi°-1O"'° + 410(L"+1o)no} (11) L -Percent Sound Levels: The L percent levels (e.g., L50, L90 & L10) refer to the A -weighted sound levels that are exceeded for 90, 50 and 10 percent of the time, respectively, during a sound measurement period. For example, the 50 -percentile exceeded sound level is designated to as L50 and is sometimes described as the median sound level. The range between the L10 and L90 values usually provides a good indication of the variability of the sound levels during the period of measurement. (12) Sound Level Meter (SLM): An instrument used to measure sound pressure level, sound level, octave -band SPL, or peak sound pressure level, separately or in any combinations thereof. The measured weighted SPL (i.e., A -Wt. Sound Level or dBA) is obtained by the use of a SLM having a standard frequency -filter for attenuating part of the sound spectrum. (13) Sound Power Level (Lw or PWL): Ten times the common logarithm of the ratio of the total acoustic power radiated by a sound source to a reference power. A reference power of a picowatt or 10-12 watt is conventionally used. (14) Tone: A tone is a sound sensation -having pitch, which is a listener's perception of the frequency (for example, the higher the frequency, the higher the pitch). For a measured sound spectrum, a tone is represented as a "peak" in the spectrum curve. Noise that contains significant tones is considered a tonal type of noise. -Page 21- ERM - Chevron Piceance Basin Natural Gas Development Project Results of a Preliminary Acoustical Assessment for the Project Hoover & Keith Inc. H&K Job No. 4004 H&K Report No. 2205 (03/13/08) (15) Relevant Standards, associated Standards Institute(s) and References American National Standards Institute (ANSI): ANSI is the national coordinator of voluntary standards development and the clearinghouse in the U.S.A. for information on national and international standards. American National Standards Institute (ANSI) S1.4: Specification for SLM: Type I SLM: Sound level meters (SLM) that meet this specification have a tolerance of +1- 0.5 dB from 22.4 to 11,200 Hz. Type II SLM: Sound level meters that meet this specification have a tolerance of +1- 0.5 dB from 63 to 2,000 Hz and +1- 1.0 dB from 22.4 to 11,200 Hz. ANSI 51.11-1971 (R-1976): Specifications for Octave, Half -Octave and Third -Octave Filter Sets. Includes a method to convert SPLs in the "old octave bands" to SPLs in the "new octave bands". ASTM Standard E1014-84: Standard Guide for the Measurement of Outdoor A -Weighted Sound Level. This guide covers the measurement of A -weighted sound levels outdoors at specified locations or along particular site boundaries, using a general-purpose sound level meter. End of Report -Page 22- REV NO. DESCRIPTION PREVIOUS DWG BY DATE 11 ft. ITEM QTY. REF. DESCRIPTION ne Fold—down Scfety ?oils and = ront Access Lccder 10 Id, �? f?. Typical Frac Tank 4 N n z LEVEL TANK 21,000 GALLON STEEL BI -LEVEL TANK W wynic WEER jce M Chevron Clear Creek 8 Inch Pipeline Integrated Vegetation and Noxious Weed Management Plan Garfield County, Colorado Photo 1. Mt. Blaine at confluence of Clear Creek and Roan Creek. Prepared for: Chevron/Texaco USA Prepared by: WestWater Engineering 2570 Foresight Circle #1 Grand Junction, CO 81505 In Coordination with: Cordilleran Compliance Services, Inc. December 2006 Chevron Clear Creek 8 Inch Pipeline Integrated Vegetation and Noxious Weed Management Plan December 2006 Introduction On November 22, 2006, a field inspection of the subject pipeline was conducted by WestWater Engineering (WWE) biologists. The inspection identified appropriate topics for inclusion in an integrated vegetation and noxious weed management plan required by Garfield County Regulation 9.07.04 (13) (BOCC, 2006). Factors considered include soil type and texture, existing land management, absence or presence of listed noxious weeds and likely potential natural vegetation community. Landscape Setting Chevron Clear Creek 8 Inch Pipeline is on the first terrace above Clear Creek and generally follows the creek and road in a southeasterly direction before turning west and climbing the slopes of Mt. Blaine. At the northern terminus, Clear Creek was dry on the date of inspection (Photo 2). Southeast of the northern terminus a few hundred meters, high quality groundwater springs commence surface flow. The stream is lined with watercress, Nasturtium officinale with a heavy riparian deciduous shrub and woodland over story comprised of mountain boxelder, Acer negundo and introduced and naturalized New Mexico locust, Robinia neomexicana (Photo 3). The New Mexico locust has crowded out most native shrubs one would expect such as skunkbush sumac (Rhus trilobata) and willows (Salix spp.). Photo 2. Dry stream bed near north terminus. Photo 3. Clear Creek flowing near mid -point. Terrain is gently sloping to moderately steep. Soils on the pipeline route are cumulic haploborolls in the meadow -forming swales and fans along the creek, Happle very channery sandy loam on moderately steep, brushy toe slopes, foot slopes, fans, and back slopes adjacent to the meadows and Biedsaw on the steep slopes where the route turns westerly to the southern terminus on the slopes of Mount Blaine. Texture of the meadow soil is very fine, sandy loam while the brushy Happle soils are variable but mostly medium texture sandy loam, deep, and well -drained with high permeability. The Biedsaw soil is clay loam or clay, but clay ranges from 35 to 45 percent, silt from 25 to 50 percent, and sand from 15 to 30 percent (NRCS, 2006b). Potential natural vegetation for meadows includes basin big sagebrush (Artemesia tridentata tridentata), western wheatgrass (Pascopyrum smithii) and basin wildrye (Leymus cinereus). For moderate, loamy slopes, needle and thread (Hesperostipa comata comata), bluebunch wheatgrass (Pseudoroegneria spicatum spicatum), Indian ricegrass (Achnatherum hymenoides) western wheatgrass, Wyoming big sagebrush (A. t. wyomingensis), and winterfat, (Krascheninnikovia Janata) is expected and was, to an extent, observed during the inspection by WWE. Similar vegetation on the steeper but still moderate, brushy slopes is expected with the Photo 4. Typical natural vegetation. Photo 5. Shrubland near turn to west. addition of bottlebrush squirreltail (Sitanion hystrix) and shadscale saltbush (Atriplex confertifolia). The westerly portion of the route across the slopes of Mount Blaine to the southern terminus has native vegetation dominated by Utah juniper (Juniperis utahensis), pinyon pine (Pinus edulis), western wheatgrass, bottlebrush squirreltail, and Wyoming big sagebrush Photo 1, cover). Current Amount of Infested Land Needing Treatment More than half the route for the pipeline is exposed to or infested with Garfield County and State of Colorado (8 CCR 1203-19) listed noxious weed species (Figure 1 and 2, p. 13 and 14). This is particularly true near Clear Creek along the edge of the deciduous riparian vegetation and meadows and where the pipeline crosses the creek. Species in bold type in Table 1 are Garfield. County listed noxious weeds and the others are listed by the State of Colorado as noted. All invasive species observed were noted due to the adverse impact these species may have on reclamation. Additionally, some species not listed in Garfield County are listed in adjacent jurisdictions, e.g., common mullein. Only Garfield County listed weeds are mapped. Table 1. Chevron Clear Creek 8 Inch Pipeline list of noxious weeds. Common Name*/ USDA Symbol Scientific Name Type** Control Methods cheatgrassc BRTE Bromus tectorum A Plant competitive grasses, limit grazing. chicory CIIN Cichorium intybas P Plant cornpetitive grasses in disturbed areas, be alert, herbicides work best on rosettes. Mowing can reduce an Recommended Treatment It is important to know whether the target is annual, biennial, or perennial to select strategies that effectively control and hopefully eliminate the target. Treatment strategies are different infestation. Chinese clematisB CLOR Clematis orientalis P same as field bindweed common burdock ARMl2 Arctirun minus B Cut and dig rosettes and bolting plants, re-seed with aggressive grasses. Herbicides probably necessary due to widespread infestation and Targe number of seed-bearing mature plants. common mullein VETH Verbascum thapsis B same as common burdock cutleaf nightshade' SOTR Solanum triflorutn A same as cheatgrass field bindweed COAR4 Convolvulus arvensis P Herbicides in fall, plant competitive grasses. houndstongue CYOF Cynoglossunt officinale B Re-seed with aggressive grasses, remove at flowering or early seed, dig or grub at pre-bud or rosette stage or apply herbicides. Russian thistle` SATR12 Salsola tragus A same as cheatgrass salt cedar Tamarix ranrosissima P Repeated or historic flooding of bottomlands to prevent seedling establishment; hand pulling seedlings; spray herbicides on basal portion of stems of young, smooth barked plants, cut larger plants and treat cut stumps within 30 minutes with herbicide plus an adjuvant (remove all stems from site after cutting - they will re-sprout if in contact with soil); shade intolerant - promote growth of native riparian species that will shade out the tamarisk. Thistle, Bull C1VU Cirsium vulgare B Till or hand grub in the rosette stage, mow at bolting or early flowering; apply seed head & rosette weevils, leaf feeding beetles, cut and bag mature seed heads. Herbicides in rosette stage. Thistle, Canada CIAR4 Cirsiurn arvense P Mowing every 2 weeks over 3 growing seasons, and using parasitic insects, or mowing every 2 or 3 weeks followed by herbicide application in late summer or fall, with combination treatments working best. When using herbicides use a mix with two different modes of action. Re-seeding with grasses only to allow spraying only when using appropriate herbicides. Thistle, Musk Carduus nutans B Tillage or hand grubbing in the rosette stage, mowing at bolting or early flowering, seed head & rosette weevils, leaf feeding beetles, herbicides in rosette stage. Thistle, Scotch OnopordumB acanthinm Tillage, hand grubbing, herbicides in rosette stage, mowing at bolting stage. *8 CCR 1203-19, Colorado Department of Agriculture, Bold type on Garfield County list, $State of Colorado "B" list, State of Colorado "C" list, 'Not currently listed but invasive and problematic in reclamation. Recommended Treatment It is important to know whether the target is annual, biennial, or perennial to select strategies that effectively control and hopefully eliminate the target. Treatment strategies are different depending on plant type and are summarized in Tables 2 and 3. Herbicides should not necessarily always be the first treatment of choice when other methods can be effectively employed. Table 2. Treatment Strategies for Annual and Biennial Noxious Weeds Target: Prevent Seed Production 1. Allow plants to expend as much energy from root system as possible, do not treat when first emerging in spring but allow growth to bud/bloom stage. If seeds develop, cut and bag if possible. 1. Hand grub (pull), hoe, till, cultivate in rosette stage and before flowering or seed maturity. seeds develop, cut and bag seed heads. If 2. Chop roots with a spade below soil level. 5. Hand pulling is generally not recommended for perennial species unless you know the plants are seedlings and not established plants. Hand pulling can be effective on small patches but is very labor intensive because it must be done repeatedly. 3. Treat with herbicide in rosette or bolting stage, before flowering. 4. Mow biennials after bolting stage, before seed set. Mowing annuals will not prevent flowering but can reduce total seed production. Herbicide treatment with two or more herbicide modes of action in fall (after approximately August 15 when natural precipitation is present) is the best method to control difficult perennials such as Canada thistle. The resilience of Canada thistle and its ability to quickly develop immunity to herbicides, particularly those used incorrectly, makes it imperative to use the proper chemicals at the correct time in the specified concentration. Most misuse seems centered around excessive use either in frequency or concentration. This results in mostly top kill and an immune phenotype. Table 3. Treatment Strategies for Perennials Target: Deplete nutrient reserves in root system, prevent seed production 1. Allow plants to expend as much energy from root system as possible, do not treat when first emerging in spring but allow growth to bud/bloom stage. If seeds develop, cut and bag if possible. 2. Herbicide treatment at bud to bloom stage or in the fall (recommended, after August 15 when natural precipitation is present). In the fall plants draw nutrients into the roots for winter storage. Herbicides will be drawn down to the roots more efficiently at this time due to translocation of nutrients to roots rather than leaves. If the weed patch has been present for a long period of time, another season of seed production is not as important as getting the herbicide into the root system. Spraying in fall (after middle August) will kill the following year's shoots, which are being formed on the roots at this time. 3. Mowing usually is not recommended because the plants will flower anyway; seed production should be reduced. Many studies have shown that mowing perennials and spraying the re -growth is not as effective as spraying without mowing. Effect of mowing is species dependent; therefore, it is imperative to know the species and its basic biology. Timing of application must be done when biologically appropriate which is not necessarily convenient. 4. Tillage may or may not be effective. Most perennial roots can sprout from pieces only 1/2" - 1" long. Clean machinery thoroughly before leaving the weed patch. 5. Hand pulling is generally not recommended for perennial species unless you know the plants are seedlings and not established plants. Hand pulling can be effective on small patches but is very labor intensive because it must be done repeatedly. Following any non-selective herbicide treatment (e.g. glyphosate), the entire treated portion should be replanted with a mix of grasses recommended in this plan. The seed mix of grasses does not include forbs or shrubs due to the presence of Canada thistle and field bindweed. Shrubs and native forbs and legumes are usually adversely affected by herbicides much as the weeds are affected. Shrub, forb and tree components of the vegetation community can be added after control of undesirable species has been attained. For example, in irrigated meadows, re- planting of the entire meadow with a mix of grasses and non -bloating legumes such as sainfoin, Onobrychis viciaefolia, followed by rest from grazing is recommended. Best Management Practices The following practices should be adopted for any construction project to reduce the costs of noxious weed control. The practices include: • top soil, where present, should be segregated from deeper soils and replaced as top soil on the final grade, • in all cases temporary disturbance should be kept to an absolute minimum, • equipment and materials handling should be done on established sites such as the northern point of origin, • disturbances should be immediately replanted with the recommended mix in the re - vegetation section. • WWE recommends moving the pipeline laterally to keep as much of the route in the meadows and out of the shrubs as possible. It is far easier to manage meadow vegetation than re-establish shrubs and forbs and control weeds in shrubs. In areas with slope greater than 3%, imprinting of the seed bed is recommended. Imprinting can be in the form of dozer tracks or furrows perpendicular to the direction of slope. When hydro - seeding or mulching, imprinting should be done prior to seeding unless the mulch is to be crimped into the soil surface. If broadcast seeding and harrowing, imprinting should be done as part of the harrowing. Furrowing can be done by several methods, the most simple of which is to drill seed perpendicular to the direction of slope in a prepared bed. Other simple imprinting methods include deep hand raking and harrowing, always perpendicular to the direction of slope. Herbicides: Difficult species respond better to application of a combination of two or more chemical modes of action (biological reason for plant death) rather than one. Local certified commercial herbicide applicators report best control of Canada thistle using a combination of modes of action. It has also been found that use of two different groups of chemicals in the same mode of action can increase effectiveness on difficult species, e.g. phenoxys and benzoic acids or carboxylic acids and benzoic acids in a mix. Some come commercially pre -mixed, e.g. Crossbow and Super Weed -be -Gone Max which are available over the counter. Some of the most effective herbicides are restricted use and available only for licensed applicators. Professionals or landowners using herbicides must use the concentration specified. Herbicides generally do not work better at higher concentrations. Most herbicide failures observed by WWE are related to incomplete control caused by high concentrations killing top growth before the active ingredient can be transported to the roots through the nutrient relocation process. Most herbicide applications should use a surfactant as directed on the herbicide label or other adjuvants as called for on the herbicide label. Grazing: There is currently heavy grazing on much of the pipeline route as evidenced by plant utilization observed on 11-22-2006. Initial observations indicate areas currently open to cattle grazing harbor the greatest distribution, diversity and density of weeds. Grazing should be controlled in a manner to enhance rather than diminish the plant community. Certain noxious weeds are highly palatable during short stages of the life cycle to certain grazing animals including goats, sheep, mule deer, elk, cattle and horses. Preparation and implementation of an appropriate grazing management plan should be considered. Photo 6. Severe meadow erosion. Mechanical: Photo 7. Typical meadow with burdock. It is recommended senescent, seed -bearing, listed weeds on the route and adjacent to the route be cut, bagged and disposed of in a licensed landfill. Rosettes can be cut with a shovel below the Photo 8. Seed bearing burdock. Photo 9. Seed bearing musk thistle. ' . Photo 10. Houndstongue rosette. Photo 11. Scotch thistle rosette. surface of the soil on plants which are not yet dormant. Even with some seed drop, cutting and bagging will greatly reduce seed release. Future need to do mechanical or other control methods should be reduced after only two seasons of cutting and bagging. Alternative Methods: Some noxious weeds are subject to damage from beneficial insects. Included are Canada thistle stem mining beetle, Ceutorhynchus litura, Canada thistle bud weevil, Larinus planus, musk and plumeless thistle rosette weevil, Trichosirocalus horridus, Canada thistle stem gall fly, Urophora cardui, and thistle defoliating beetle, Cassida rubiginosa, which feeds on the foliage of Canada, musk, and plumeless thistles (Sullivan, 2004). Currently, the thistles present are not of sufficient density, in the opinion of WWE, to support populations of insect parasites. Therefore it is unlikely these insects would be helpful unless explosive spread and growth occurs after the pipeline is constructed. The bindweed mite, Aceria malherbae, is a microscopic mite imported from southern Europe as a biological control agent for field bindweed (Hammon, 2006). According to recent anecdotal information it may be a very effective control for bindweed on pipeline route. This mite may be useful for reducing field bindweed. Another alternative method, particularly for cheatgrass infestations and poor to non-existent topsoils in the Utah juniper woodlands on Mt. Blaine, is the application of vesicular-arbuscular mycorrhizal fungi (V/AMF). These fungi, mostly of the genus Glomus are symbiotic with about 80% of all vegetation. Endo-mycorrhizal fungi are associated mostly with grasses and forbs and ecto-mycorrhizal fungi are associated mostly with trees and some shrubs. In symbiosis, the fungi increase water and nutrient transfer capacity of the host root system by as much as several orders of magnitude (Barrow and McCaslin, 1995). Over-the-counter commercial products, which are better adapted to coating seeds when reseeding and treating roots of live seedling trees and shrubs at time of planting come in powder and are available from many different sources. Some applicators, including a New Castle company, collect and grow local accessions of V/AMF. The latter are applied to weed patches and are reputed to greatly increase competition of native plants with Canada thistle in particular thereby affecting a non -chemical control of some noxious weeds. Revegetation Soil types on the property support many of the same species of native vegetation. As stated previously, the recommended mix is limited to grasses due to the prevalence of field bindweed and the need to use selective herbicides to spot treat for perennial Canada thistle and field bindweed, biennial common burdock, bull, scotch, and musk thistle. Table 4. Recommended Seed Mix for Drilled or Hydro -seed Rate for Chevron Clear Creek 8 Inch Pipeline Scientific Name/Seeds per Pound Common Name/Preferred Cultivar No. PLS/Ft z % of Mix by PLS Wt. Application Rate Lbs PLS/acre Achnatherum hymenoides 140,000 Indian ricegrass/ Paloma* 4 12.5 1.25 Hesperostipa comata comata 115,000 Needle and thread 4 15 1.5 Pascopyrum smithii 140,000 Western wheatgrass/ Arriba* 10 31 3.1 Pseudoroegneria spicata spicata 140,000 Bluebunch wheatgrass/ P7 10 31 3.1 Sitanion hystrix 192,000 Bottlebrush squirreltail 4 10 0.90 Poa canbyi 925,000 Canby bluegrass/ Canbar 4 0.5 0.19 Total PL 100 100 10.04 Lbs. PLS/AC *WWE recommends accepting no other cultivar for this site. (NRCS, 2006a), Colorado Natural Heritage Program, 1998. Seeding rate should be doubled for broadcast application. Preferred seeding method is multiple seed bin rangeland drill with no soil preparation other than simple grading to slope and waterbars. Seed should be bagged separately so each size group of seed can be metered at the appropriate rate. Applying a quarter pound over an acre with a species such as canby bluegrass is difficult and may require use of wheat bran or rice hulls or some other adjuvant to assist metering the small seeds at the appropriate rate. Alternative seeding methods include but are not limited to: • harrow with just enough soil moisture to create a rough surface, broadcast seed and re - harrow, preferably at a 90 degree angle to the first harrow, • hydro -seeding (most economical in terms of seed cost), and • hand raking and broadcast followed by re -raking at a 90 degree angle to the first raking. • These are not the only means of replanting the site. However, these methods have been observed to be effective in similar landscapes. Upon successful control of target species and establishment of grasses, shrubs, forbs and trees can be planted without concern for herbicide damage. Few native forb seeds are available commercially as cultivars. Most are collected from natural populations. Native shrubs and forbs often do not establish well from seed, particularly when mixed with grasses. Past experience has shown that stabilizing the soil with grasses, accomplishing weed control and then coming back to plant live; containerized woody species in copses has been the most cost effective method for establishing the woody species component of the plant community. Life Cycle and Management Calendars Figure 1 is a 2 year calendar for control and life cycle of biennial thistles. It is also appropriate to control of common burdock and common mullein. One column which should be added is cutting of rosettes which can be done any time during growing. Figue 1. Life Cycle and Management strategies for biennial thistles. Herbicide Application .ram. Err;erprIce 4 Rosette Herb, Appt. Mowing ► Dohs Flews Dies Spnng Sumner Fell Winton Spring Summer Year 1 Year 2 Hartzler, 2006. Table 5 is a calendar of strategies and when to undertake them specifically for Canada thistle. Table 5. Canada thistle management calendar Jan Feb Mar Apr May June July Aug Sep Oct Nov Dec Active Growth X X X X X X X Bio -Control (Grazing) X X 1 Mowing X X Herbicide Application X X X X Adams County Cooperative Extension Service, 2003 Table 6 is for other listed noxious weed species present in the pipeline route. Table 6. Life cycle and management calendar for other noxious weeds July flowering germination 'Aug Sept I� 1 1 Oct Nov I Dec Species 7 e• Jan Feb March April [May June hicory BI I C--> _ermination rosettes (bolting •rebud (flowering - seed set P = perennial; CP = creeping perennial oundstongue B annual; [rosettes B = biennial; = annual; WA = winter haded areas indicate best control timing. Is 1 Commercial Applicator Recommendations A certified commercial applicator is a good choice for initial control efforts. An applicator has the full range of knowledge, skills, equipment and experience desired when dealing with Canada thistle and other difficult vegetation. A reputable local company, Julius Ag, Andy Julius, Certified Applicator's License No. 11210, Julius Ag, 2169 I-70 West Frontage Road, Debeque, CO 81630, 970-379-6917 has the experience and knowledge necessary for success. Reclamation farming with multiple seed bin range drills and related equipment is also available through Julius Ag. An alternative applicator using V/AMF and other natural products locally is: Alpha Natural, Inc., 1808 Road 245, New Castle, CO 81647, 970-984-2467. Common chemical and trade names may be used in this report. The use of trade names is for clarity by the reader. Inclusion of a trade name does not imply endorsement of that particular brand of herbicide and exclusion does not imply non -approval. Certified commercial applicators will decide which herbicide to use and at what concentration. Landowners using unrestricted products must obey all label warnings, cautions, and application concentrations. The author of this report is not responsible for inappropriate pesticide use by readers. References Adams County Cooperative Extension Service. 2003. Managing Canada thistle. Colorado State University Cooperative Extension. Brighton, CO. 2 pp. Barrow, J.R., and Bobby D. McCaslin, 1995. Role of microbes in resource management in arid ecosystems. In: Barrrow, J.R., E.D. McArthur, R.E. Sosebee, and Tausch, Robin J., comps. 1996. Proceedings: shrubland ecosystem dynamics in a changing environment. Gen. Tech. Rep. INT -GTR -338. Ogden, UT: USDA, For. Serv., Intermountain Res. Sta., 275 pp. Colorado Natural Areas Program. 1998. Native Plant Re -vegetation Guide for Colorado. Caring for the Land Series, Vol. III, State of Colo., Div. Parks and Outdoor Rec., Dept. Nat. Res., Denver, 258 pp. Board of County Commisssioners, 2006. Garfield County zoning resolution of 1978, amended October, 2006. Building and Planning Department, Glenwood Springs, CO, 78 pp. Hammon, Bob, 2006. Managing Field Bindweed with the Bindweed Mite Acerin malherbae. Cooperative Extension Service, Colorado State University, Fort Collins. URL: http://www.coopext.colostate. edu/TRAJPLANTS/index.html#http://www. coopext.colostate.edul TRA/PLANTS/bindweedmite.html Hartzler, Bob, 2006. Biennial thistles of Iowa. ISU Extension Agronomy. URL: http://www.weeds.iastate.edu/mgmt/2006/iowathistles.shtml Natural Resource Conservation Service (NRCS), 2006a. The PLANTS Database (http://plants.usda.gov, 7 September 2006). National Plant Data Center, US Department of Agriculture, Baton Rouge, LA 70874-4490 USA. NRCS, 2006. Web Soil Survey, US Dept. of Agriculture. URL: http://websoilsurvey.nres.usda.gov Sirota, Judith, 2004. Best management practices for noxious weeds of Mesa County. CSU Cooperative Extension Tririver Area. Grand Junction, CO. URL: http://www.coopext.colostate. edu/TRA/PLANTS/index.html#http://www.coopext.colostate.edu/ TRA/PLANTS/bindweedmite.html State of Colorado, 2005. Rules pertaining to the administration and enforcement of the Colorado Noxious Weed Act, 35-5-1-119, C.R.S. 2003. Department of Agriculture, Plant Industry Division, Denver, 78 pp. Sullivan, Preston, G. 2004. Thistle control alternatives. Appropriate Technology Transfer for Rural Areas, National Sustainable Agriculture Information Service, Fayetteville, AR, 9 pp. CIIN CANU4, CYOF TARA, CIAR4, CYOF 1 � CAN0.4, CYOF C 1 j i / (CYOF CYO': `'� %-/: 11`\ CANU4, CYOF, CIIN CIVU C 1 ARMI2'' CYOF ARMI2 _ /�' ++ CYOF,AR 2 ARMI2 CANU4, CYOF CANU4 CIVU, CYOF Legend • Weed Poinl Locations Plants (See Table 1) - ARMI2 ARMI2, CANU4, CIAR4 CYOF, TARA ARMI2. CYOF CANU4 CANU4, CIVU, CYOF CANU4 CYOF - CIIN ® CYOF Pipeline n BLM CANU4, CYOF, Figure 1 Chevron/ Texaco U.S.A. Inc. Clear Creek 8 Inch Pipeline Weed Survey - December 2006 Miles 0 0.25 0.5 • CYOF RAS -- IAR4u CIIN 1 RMI CYO IAR4, Scott zef Legend • Weed Point Locations Plants (See Table 1) - ARMI2 ARMI2, CANU4, CIAR4 CYOF, TARA ® ARMI2. CYOF F-7 CANU4 CANU4. CIYU, CYOF CANU4, CYOF - CIIN ® CYOF Pipeline BLM .t 0 Figure 2 Chevron/ Texaco J.S.A. Inc. Clear Creek 8 Inch Pipeline Weed Survey - December 2006 0.25 Miles 0.5 1 NestWater Engineering 2516 FORESIGHT CIRCLE, #1 GRAND JUNCTION, COLORADO 81505 (970) 241-7076 FAX: (970)241-7097 July 11, 2006 Mr. Sean Norris, Senior Project Geologist Cordilleran Compliance Services, Inc. 826 21'// Road Grand Junction, CO 81505 RE: Biological Survey for Chevron/Texaco 8" Natural Gas Pipeline, Clear Creek, Garfield County, Colorado Dear Mr. Norris: Field surveys were conducted on July 5-6, 2006 to investigate the occurrence of raptors, United States Fish and Wildlife Service Birds of Conservation Concern and T & E/sensitive plants along and adjacent to a proposed natural gas pipeline in lower the Clear Creek Canyon in Garfield County, Colorado. The proposed 8 -inch pipeline, which is approximately 6.25 miles long, runs parallel to Garfield County Road 211, except on the southern portion where it turns west and runs for about 2 miles (Figure 1). Surveys were conducted using roadside observations from a motor vehicle and on foot in order to more thoroughly inventory the pipeline alignment. Field observations to document the presence of raptors were conducted using binoculars, listening for raptor vocalizations and searching for nests and sign of raptor presence. Searching for raptor sign included looking for droppings, castings, feathers, excrement (whitewash) and discarded prey items, particularly around nest sites. Potential raptor nesting habitat was surveyed including piflon juniper woodlands and box-elder/Mexican locust vegetation that was predominantly found along the Clear Creek riparian corridor. The canyon walls along Clear Creek and its tributaries were surveyed to determine the presence of raptors and nest sites. Plant surveys were conducted in conjunction with raptor and bird of conservation concern inventories. RESULTS Raptors Two species of raptors were observed during the survey. Species included Cooper's Hawk (Accipiter cooperii) and American Kestrel (Falco sparverius); seven individual raptors (5 adults, 2 chicks) were counted. Two active nest sites were found and four nests that were likely to have active during the 2006 nesting season were located (Table 1 and Figure 2). The survey was conducted late enough in the current nesting season that a large portion of raptors have already fledged their chicks. The inactive nests (at time of survey) were determined to have been either active and fledged or possibly active but failed, based on observations in and around the nest. In most cases, raptor whitewash was observed under nests or deposited on current annual plant growth, which indicates recent presence of raptors. One possible American Kestrel nesting territory was located, but no nest was found. Based on chick size, feathered development and movements within Cooper's Hawk nest # 2, the young were estimated to be approximately 10-12 days old on July 6, 2006 (Figure 3 and 4). Cooper's Hawks will typically fledge at about 30-34 days. Therefore, it is likely that fledging would occur around July 30. The status of nest # 1 is unknown (either eggs or chicks) and if the adults were incubating at the time of the survey, fledging may not occur to sometime in mid- August. The active Cooper's Hawk nest sites #'s 1 and 2 are located about 105 feet and 265 feet from the centerline of the pipeline ROW, respectively (Figure 1 and 2). The proposed pipeline construction will result in increased human activity and vehicular traffic in the vicinity of the nest site, increasing the potential of nest failure. What is not known is the level of vehicular/human activity that would cause these nesting pairs to abandon the nests. The Colorado Division of Wildlife does not have a recommended buffer for Cooper's Hawks; however, it is our opinion that a one-quarter mile buffer zone around this nest would decrease the likelihood of nest failure due to project related disturbance. Nests # 2 is located in a box -elder tree about 300-400 feet east of an active drill pad west of Clear Creek. This pad has apparently received a substantial amount of activity and daily traffic and these birds have shown a tolerance for this level of disturbance. In general, raptors have a higher tolerance to occasional vehicular traffic and a lower tolerance to "constant" human -related activity on the ground. It is generally accepted by avian biologists that raptors have a stronger fidelity to their nest site after young have hatched and are more apt to abandon their nest site in response to disturbance during incubation. Table 1. Active and inactive raptor nests;Lower Clear Creek, Garfield County, Colorado, July 2006. Species Zone UTM Fasting UTM Northing Observation Cooper's Hawk 12S 728650 4382370 2 adults defending a nest, no chicks observed due to foliage, but active nest. Cooper's Hawk 12S 730517 4378352 1 adult female observed on nest brooding a minimum of 2 chicks, possibly more. American Kestrel 12S 730228 4379000 Adult male observed, possible active nest in area. Possible Cooper's Hawk 12S 730228 4378940 A maternal -acting female Cooper's in the area with a box -elder tree with whitewash underneath. Several stick nests in the area; none showed signs of recent use. Unknown raptor I 12S 730698 4378308 Stick nest in a 35 ft. box -elder tree east of the pipeline alignment. Whitewash on vegetation surrounding the nest. Unknown raptor 12S 730820 4377413 Nest determined to have been active, with whitewash on vegetation below nest, which was in a 75 ft box - elder. Cooper's Hawk 12S 730847 4376427 Cooper's Hawk territory/roosting site in a box -elder along Clear Creek. No nest found, but whitewash and feathers on ground indicated frequent use in the area. 2 Construction Recommendations: If possible, delaying pipeline construction within 0.25 miles of the active nest sites until fledging occurs will reduce the chances of nest failure. The nest sites should continue to be monitored by qualified personnel if construction approaches the nest site prior to fledging. If construction cannot be delayed until fledging, construction activities, vehicular and equipment traffic, and on -ground personnel should be confined to the side of the pipeline corridor away from the nest, which would maximize the buffer between disturbance and the nest. Individual raptors react to disturbance inconsistently; therefore, it is difficult to predict how these birds, which have adapted to the current level of disturbance, would react to pipeline construction. Birds of Conservation Concern The U.S. Fish and Wildlife Service places its highest priority for conservation for those species listed as Birds of Conservation Concern for the Southern Rockies and Colorado Plateau. No birds of conservation concern were observed during the survey. Clear Creek, due to the riparian vegetation, is suitable habitat for a variety of bird species. Threaten, Endangered, or Sensitive Plant Species Plant species that may be subject to protection under the ESA list and could potentially occur in this area are shown in following table. Common Name Scientific Name ESA Status Uinta Basin hookless cactus Sclerocactus glaucus Threatened (T) Debeque phacelia Phacelia submutica Candidate for Listing Debeque milkvetch Astragalas debequaeus Proposed for Listing For two of these species, specific soil types are necessary for the occurrence of these species. The Debeque phacelia and the Debeque milkvetch require soils consistent with the Wasatch formation and this soil type was not observed along the pipeline alignment. The soil type along Clear Creek appears to be that of the Green River formation. The sagebrush and open pifion-juniper along Clear Creek and on the westward portion of the pipeline bisects possible Uinta Basin cactus habitat but no plants were observed. Please feel free to contact our office if you have questions regarding this report, or if we can be of service in any way. Sincerely, (1041_ Van K. Graham Environmental Scientist/Wildlife Biologist 3 Active Cooper's Hawk nest # 1 a JC i s � 41 7114 Ii911T' J Ti 4, 11881 t7 Active Cooper's Hawk nest # 2 14.,11 DL, 011!+w 2.9 IIT nu 1111z •... ,df 1, 1n\J' 1144111 1'...1. 111'. -111111. L__ I•R111'IISFII 11" \LTI (1 Li 1, L. 1•'1'1'11\1': 111 I'O11\-1111" -, '111 HI. 11 V.1,1' 141 OE Ttii; SIX 111 F'I:l\1 11' LI LIh:I9111 \\. 1, ll!FII! Il 1 I M1) 1110 1\11 -.1.:11IO\- 1 9 19. I.1. n 241 11)41\ -1111 44 ',111'111. IY\\111 111h ''.4\ 111 1'111\111''1 111'Ic111I1\ 1 11:111'111 1n1 \'Il, 1III(IItLl111 u 1:E111 011 f0. Ati /,. 1-x1Txn\/11\11V1 11Yi1111'14 i PM!iYL-- OEEA /, te.-En pp, cu. I 1 r/o i'II41T84\JTEXIC 1 �IIF.IJ. i4 I rltnmrn IN 4111114. 1 H:,.V1IkI4 it Gu1th c0\5'4G• b.a.eV's ♦. Oc: G.\G &¢ 0. 10 x ens: _-G-i-•-i-ii Figure 1. Chevron/Texaco 8 inch natural gas pipeline, Lower Clear Creek, Garfield, County. 4 M1 72BGoomE /29aoomE, 7 30 omE, 731®oamE. WGS64 Zone 12S 732000mE, Active Cooper's Hawk nest # 1 Possible active Cooper's Hawk nest Possible active unknown raptor Active Cooper's Hawk nest # 2 Figure 2 Chevron Clear Creek Pipeline Biological Survey July 5-6, 2006 Possible active Cooper's Hawk TN Tr I1'.° l28000r.,E- 729000m 30000m E. ?31worn E, WGS64 Zone 125 '32000mE. a 1 AGI[ II— CO3 fk(I Q SW � l AKf RI Map mewl wall TOM* 62003 Nahum! Oeoei pblc (www mmmlgaograpkic.coldlapo) z 5 Two Cooper's Hawk chicks Figure 3. Cooper's Hawk nest with two chicks on an old magpie nest. Figure 4. Cooper's Hawk nest in a box -elder tree in riparian habitat along Clear Creek, Garfield County, Colorado, 6 Clear Creek Biological Survey Photo 1. Mt. Blaine marks the south end of Skinner Ridge on the west side of Clear Creek Prepared for: ChevronfTexaco USA Prepared by: WestWater Engineering 2570 Foresight Circle #1 Grand Junction, CO 81501 In Coordination with: Cordilleran Compliance Services, Inc, May 2007 Clear Creek Biological Survey May 2007 1.0 Introduction Chevron requested that WestWater Engineering (WWE) conduct a biological survey as early as possible in Spring 2007 to document the location of raptor nests, the presence of Threatened, Endangered and Sensitive Plant Species (TESS); the extent of weed infestations; the presence and location of Birds of Conservation Concern (BOCC) other than raptors; the location of waterways under the jurisdiction of the U. S. Army Corps of Engineers (COE); and the general condition of the aquatic habitat in Clear Creek and its tributaries. 1.1 Pr ject Scope and Location Clear Creek is located in Garfield County, Colorado. It is one of the major tributaries of Roan Creek. The mouth of the canyon is located approximately 12 miles north of the town of DeBeque. Clear Creek and its tributaries drain approximately 113 square miles of the Roan Plateau. Elevations range from 5,485 ft at the mouth of the canyon to 8,011 ft at the top of Mount Blaine (see Photo 1). This biological survey was restricted to the portion of Chevron properties located under the rim of Clear Creek (see Photo 2 and Figure 1). This area is referred to as the Clear Creek drainage or "the canyon" in the following sections of the report. Although Chevron is actively developing the natural gas resources in Deer Park Gulch, that drainage is owned by Shell and WWE biologists did not receive permission to survey the Shell private surface. The same restriction applied to Doe Gulch, Scott Gulch and approximately 11/2 miles of lower Clear Creek. Photo 2. This biological survey was limited to Chevron property under the rim of Clear Creek WestWater Engineering Page 1 of 24 pages 5/21/2007 Project Location A COLLURA Figure 1: Chevron Clear Creek Overall Map Biological Survey Westwater Engineering Miles (Scale 1'100,000) 0 0.5 1 2 Legend Survey Area BLM 1.2 Landscape Setting During the survey, Clear Creek was flowing the entire length of the stream due to spring run-off. As runoff ceases, flows diminish and the stream flows intermittently, disappearing underground at several locations. The vegetation adjacent to the stream consists of a few riparian deciduous shrubs and a woodland over story comprised of mountain boxelder (Acer negundo), introduced and naturalized New Mexico locust (Robinia neomexicana), a few remnant of Fremont cottonwoods (Populus fremontii) in lower Clear Creek, and narrowleaf cottonwoods (Populus angustifolia) above the confluence of Cottonwood Creek. In some areas the New Mexico locust has crowded out most native shrubs normally found in this riparian zone such as skunkbush sumac (Rhus trilobata), wild rose (Rosa woodsii), chokecherry (Prunus virginiana), and willow (Salix spp.) Woody vegetation on the upland slopes consists of basin big sagebrush (Artemesia tridentata tridentate), gambels oak (Quercus gambel), rabbitbrush (Chrysothammmus spp.), snowberry (Symphoricarpus occidentalis), serviceberry (Amelanchier alnifolia), skunkbush sumac, currant (Ribes spp.), Oregon grape (Berberis repens), and clematis (Clematis spp.). The understory is primarily cheatgrass (Bromus tectorum) and a mix of annual, biennial and perennial weeds. Few native grasses and forbs are present. Potential natural vegetation for meadows includes basin big sagebrush, western wheatgrass (Pascopyrum smithii), and basin wildrye (Leymus cinereus). For moderate, loamy slopes, needle and thread (Hesperostipa comata comata), bluebunch wheatgrass (Pseudoroegneria spicatum spicatum), Indian ricegrass (Achnatherum hymenoides), western wheatgrass, Wyoming big sagebrush (A. t. wyomingensis), and winterfat, (Krascheninnikovia lanata) is expected. Similar vegetation on the steeper but still moderate, brushy slopes is expected with the addition of bottlebrush squirreltail (Sitanion hystrix) and shadscale saltbush (Atriplex confertifolia). 2.0 Birds of Conservation Concern 2.1 Background Information As part of the protection and management of avian species, the Fish and Wildlife Service (FWS) in 2002 published a list of BOCC (FWS 2002). In a Memorandum of Understanding (MOU), the Bureau of Land Management (BLM), FWS and Forest Service (FS) placed the highest priority for conservation on birds included on the BOCC list. A subset of this list includes a register of BOCC for the Southern Rockies and the Colorado Plateau, including Western Colorado. Not all of these BOCC species occur regularly in Colorado and some are present only as seasonal migrants. After a thorough review of the literature (Andrews and Righter 1992, Kingery 1998), WWE biologists compiled a list of the BOCC species likely to nest in the Clear Creek/Roan Plateau area. Habitat and nesting records for BOCC, as described in the Colorado Breeding Bird Atlas (Kingery 1998, and references therein) and Colorado Birds (Andrews and Righter 1992), in the vicinity of Clear Creek are summarized below. Bird identification and taxonomic nomenclature are in accordance with that applied by the Colorado Breeding Bird Atlas Project (Kingery 1998). 2.2 Raptors The BLM, in its approved White River Resource Area Resource Management Plan (1997), places special emphasis on conservation of all raptors, including species indigenous to the Roan Plateau but not on the BOCC list. The BLM objectives for raptors state: "Maintain the short- term utility and promote the continued long-term development and availability of suitable raptor WestWater Engineering Page 3 of 24 pages 5/21/2007 habitats. This includes prey base, nest sites and other special habitat features necessary to help stabilize or allow increases in regional raptor populations." Table 1 includes the common name, scientific name, BOCC status, habitat requirements and breeding status for raptors that could be observed in the Clear Creek drainage. Table 1. Raptor species potentially present in the Clear Creek drainage Common Name Scientific Name BOCC Listed Habitat & Breeding Records Bald Eagle Haliaeetus leucocephalus Y • Riparian corridors along major river drainages in Western Colorado. Nests in mature cottonwood trees, most commonly within 100 yards of open water. • Uncommon Nester: Approximately 5 known nests found along the Colorado River from Rifle, CO downstream to the Utah state line. • Common Winter: migrant along the Colorado River corridor, Roan Creek and Parachute Creek. Northern Harrier Circus cyaneus Y • Grassland, shrubland, agricultural areas, and marshes. Nests in areas with abundant cover (e.g., tall reeds, cattails, grasses) in grasslands and marshes. Also known to nest in high -elevation sagebrush. • Uncommon: Found by WWE to be a nester near the Divide Road in the Stewart and Story Gulch area in Rio Blanco and Garfield Counties, 2006. Cooper's Hawk Accipiter cooped' N • Cottonwood riparian to spruce/fir forests, including pinonljuniper woodlands. Nests most frequently in pines and aspen. • Common: Confirmed breeder in Rio Blanco and Garfield Counties and recently along Clear Creek. Sharp -shinned Hawk Accipiter striatus N • High density young, or even -aged, stands of coniferous forest and deciduous forests of aspen or oak brush with small stands of conifers. • Uncommon: Confirmed breeder in Rio Blanco and Garfield Counties. Northern Goshawk Accipiter gentiles N • Typically in high elevation coniferous or aspen forest. Can occur in Piron-juniper habitat. • Rare: Confirmed breeder in Rio Blanco and Garfield Counties. Red-tailed Hawk Buteo jamaicensis N • Diverse habitats including grasslands, pinon- juniper woodlands and deciduous, coniferous and riparian forests. Nests in mature trees (especially cottonwood, aspen, and pines) and on cliffs and utility poles. • Common: Confirmed breeder throughout the Roan Plateau area. Swainson's Hawk Buteo swainsoni Y • Typically, arid grassland, desert, agricultural areas, shrublands and riparian forests. Nests in trees in or near open areas. • Uncommon: Confirmed breeding in oak brush by WWE biologists on Roan Plateau, 2005. WestWater Engineering Page 4 of 24 pages 5/21/2007 Table 1. Raptor species potentially present in the Clear Creek drainage Common Name Scientific Name BOCC Listed Habitat & Breeding Records Ferruginous Hawk Buteo regalis Y • Ungrazed to lightly grazed grassland and shrubland with varied topography. Nests in isolated trees, rock outcrops, structures such as windmills and power poles, or on the ground (especially on hill tops). • Uncommon: Nesting has been recorded in western Rio Blanco and Garfield Counties. Golden Eagle Aquila chrysaetos Y • Grasslands, shrublands, agricultural areas, pinon- juniper woodlands, and ponderosa forests. Prefers nest sites on cliffs and sometimes in trees in rugged areas. • Common: Confirmed breeder in Rio Blanco and Garfield Counties. American Kestrel Falco sparverius N • Coniferous and deciduous forests and open terrain with suitable perches. Nests in cavities in trees, cliffs and buildings. • Common: Confirmed breeder in Rio Blanco and Garfield Counties. PeregrineFalco Falcon peregrinus y • Pinon juniper woodlands and coniferous and riparian forest near cliffs. Nests on ledges of high cliffs away from human disturbance. • Rare: Nesting confirmed in Parachute Creek and the Bookcliffs north of Interstate Highway 70 in Garfield County. Prairie Falcon Falco mexicanus Y • Grasslands, shrublands, and alpine tundra. Nests on cliffs or bluffs in open areas. • Rare: Confirmed breeder in Rio Blanco and Garfield Counties. Flammulated Owl Ofus flammeolus Y • Dry, montane ponderosa pine, Douglas -fir, and aspen dominated forests. Also known to nest in old-growth pinon-juniper. Nests in cavities in trees. • Rare: Confirmed presence and likely breeder in Garfield County, documented in aspen east of Clear Creek Canyon by WWE biologists during 2006. Great Horned Owl Bubo virgiriianus N • Occupies diverse habitats including riparian, deciduous and coniferous forests with adjacent open terrain for hunting. • Common: Confirmed breeder in Rio Blanco and Garfield counties. Northern Saw- whet Owl Aegolius acadicus N • Mountain and foothills forest and canyon country. Significant use of piiion-juniper woodland and Douglas -fir. • Uncommon: Confirmed breeder in Garfield and Rio Blanco Counties. WestWater Engineering Page 5 of 24 pages 5/21/2007 Table 1. Raptor species potentially present in the Clear Creek drainage Common Name Scientific Name BOCC Listed Habitat & Breeding Records • Occupies mixed shrublands. Nests and roost in sites in dense cottonwoods, willows, scrub oak, junipers and dense forest of mixed conifers and Long-eared Owl Asio otos N aspens. • Uncommon: Confirmed breeder in Rio Blanco County and in Garfield County along Parachute Creek in 2006. 2.3 Procedures for raptor surveys WWE biologists conducted surveys for raptors in Clear Creek from March 29 through April 30, 2007. The search was focused to locate active raptor nests; however, all raptor sightings and nest locations (including inactive nests) were recorded. Based on a reconnaissance of the entire drainage on March 29, the area was divided into 33 "search areas" to facilitate surveys of the extensive cliff habitat. Biologists worked in two-man teams and spent an average of four hours per session systematically searching the cliff faces for nests and bird activity following protocol described by Craig and Enderson (2004). Each biologist used binoculars and a spotting scope equipped with a zoom ocular lens (usually 20-60 power variable) which permitted close -in views of potential nest sites. When possible, two to three teams worked together covering up to two miles of the canyon to better track eagles, falcons and buteos and determine what ledges or caves were being actively used by the birds. Cliff searches were most productive in the morning hours; in the afternoons, WWE biologists walked the riparian corridors or pinon-juniper (PJ) -covered hillsides searching for nests of other raptor species. In addition to these visual searching techniques, the biologists used the recorded call play -back methodology described by P. Kennedy (Kennedy and Stahlecker 1993; the "Kennedy- Stahlecker-Rinker" method) as modified by R. Reynolds and others (1992) for the southwestern United States. WWE biologists used "Predation MP3 Game Caller" units and played the call of a Great Horned Owl or a Cooper's Hawk alarm call in an attempt to locate raptors who often respond to the presence and calls of other raptors. In an attempt to determine which owl species are present in Clear Creek canyon, an owl survey was conducted during the evenings of April 25 and 26, 2007. Two teams started at opposite ends of the canyon, one at the mouth and the other at the confluence of Willow Creek and No Name Creek. Using the "Predation MP3 Game Caller" units, the owl calls were played for 30 seconds and biologists listened for response for 2 minutes for each species of owl; each team played the calls of two owl species before driving one half mile along the main road to the next station. The team moving down -canyon played the Northern Pygmy Owl and Long-eared Owl calls, while the team traveling up -canyon played the Flammulated Owl and Northern Saw -whet Owl calls. A total of ten minutes were required to play calls, listen for response, and move to the next station. Each team played their owl calls at 32 stations, covering the main canyon and Tom Canyon. All locations of birds, nests and owl response were recorded using handheld GPS units and locations are reported as UTM coordinates (Datum: WGS84, Zone: 12S). WestWater Engineering Page 6 of 24 pages 5/21/2007 2.4 Raptor Observations WWE biologists observed an abundance of raptors in Clear Creek in April, 2007. Numerous individuals of ten species were recorded and biologists determined that eight species were nesting in the canyon. Golden Eagles were well established in Clear Creek in late March and were observed the entire length of the canyon. Eagle cliff nesting sites were located from the face of Mt. Blaine to the upper end of Willow Creek. Red-tailed Hawks were observed on numerous occasions throughout the entire drainage. Northern Harriers were observed from late March, primarily hunting along the canyon floor, but no nesting sites were recorded. Sharp -shinned Hawks were observed on several occasions, but no nesting sites were discovered. American Kestrels were observed all month throughout the drainage. Peregrine Falcons appeared about mid-April and established nesting territories in Tom Canyon and upper Clear Creek. Likewise, Cooper's Hawks appeared about mid-April, and through the rest of the month these birds were establishing nesting territories. Like Red-tailed Hawks and Golden Eagles, Cooper's Hawks were found throughout the entire drainage. WWE biologists also expected to find Prairie Falcons, but none were observed in Clear Creek. Great -homed Owls were observed both in the PJ habitat under Mt. Blaine and in the riparian habitat (night surveys) along the creek(s). Flammulated and Northern Saw -whet Owls response locations were recorded during night owl surveys in the riparian habitats. Photos 3 and 4 portray a Northern Saw -whet Owl and a Flammulated Owl that responded to calls during the owl survey. Photos 3 and 4. Northern Saw -whet Owls (L) and Flammulated Owls (R) responded to the calls Figure 2 shows the locations of active and inactive raptor nests as well as the locations of owl responses during the owl survey. Details are provided below for each active raptor nest that was discovered; the following abbreviations are used: Golden Eagle — GOEA; Peregrine Falcon — PEFA; American Kestrel — AMKE; Cooper's Hawk — COHA; Red-tailed Hawk — RTHA; Great -homed Owl — GHOW; Flammulated Owl — FLOW; Northern Saw -whet Owl — NSWO. WestWater Engineering Page 7 of 24 pages 5/21/2007 GOEA-1 (730370mE 4382000mN): Nest with fresh pine boughs in cliff "pothole" in Weiss Creek. Watched adult Goldens bring prey items to nest and incubation switch. Also saw incubation switch on April 14. GOEA-2 (721710mE 4390275mN): Stick nest about one third way up cliff in No Name Creek. Visited by adult pair of Goldens, sticks taken to nest, but birds will not breed this year. PEFA-1 (728840mE 4385965mN): Adult pair of Peregrine Falcons present in Potts Creek, but no nest ledge selected as of 26 April, 2007. Coordinates mark center of activity. PEFA-2 (720045mE 4388635mN): Adult pair of Peregrine Falcons near the falls in Clear Creek One copulation observed; no nest ledge selected as of 25 April 2007. Coordinates mark the center of activity. AMKE-1 (728080mE 4383660mN): WWE biologist witnessed adult pair breeding in a cottonwood snag near the mouth of Tom Canyon. COHA-1 (726345mE 4384715mN): Stick nest with fresh nesting material 30 ft high in a 35 ft Box Elder tree on main Clear Creek above Tom Canyon; pair of Cooper's Hawks defended the nest. COHA-2 (725200mE 4386410mN): Stick nest with fresh fir bough in a box elder 25 ft above the ground in the riparian zone in Sheep Creek. Cooper's Hawk defended the nest site. COHA-3 (728220mE 4385615mN): Good stick nest 30 ft up in 40 ft boxelder. Adult COHA seen in the area two days; once perched on the edge of the nest. RTHA-1 (728075mE 4387030mN): Stick nest about 80 ft up on 160 ft cliff in Tom Creek. Adult Red -tail Hawk defended the nest against a GOEA. In addition to the active nests described above, there were several areas in which raptors were observed and nesting is likely to occur. For example, there were many sightings of GOEA in "Rattlesnake Basin" the southernmost basin on the east side of Clear Creek. On multiple occasions, WWE biologists observed Golden Eagles visiting stick nests on a large cliff with multiple nests, but the birds did not stay at any one nest long enough to prove it to be active. In a similar manner, GOEA were observed on several occasions in Tom Canyon, especially near the confluence of Tom and Clear Creeks. On one occasion, the birds landed on a large stick nest on the west side of Clear Creek, but it proved not to be an active nest. Many inactive GOEA nests are located in the upper portion of Clear Creek and also in Willow Creek. The large cliffs provide a wide variety of sites suitable for nesting; WWE biologists termed the small caves "potholes"; many were large enough to hold the large stick nests built by GOEA. Although only one active Kestrel nest is shown on the map, many adult Kestrels were observed along Clear Creek. These small raptors nest in holes in large cottonwoods or box -elders in the riparian zone; their nests are easily missed during surveys. Sharp -shinned Hawks (SSHA) were WestWater Engineering Page 8 of 24 pages 5/21/2007 observed on several occasions. Although no SSHA nests were discovered, they are likely nesters in Douglas Fir habitat on northeastern exposures in the upper canyon(s). 2.5 Birds of Conservation Concern (BOCC) other than raptors Table 2 provides the common name, scientific name, habitat requirements and breeding status of birds on the BOCC list that could be found under the rims of the Clear Creek drainage. Table 2. BOCC species (other than raptors) that may nest in the Clear Creek area Common Name Scientific Name Habitat & Breeding Records Black Swift Cypseloides niger • Nest cup of moss and mud on a cliff behind or near a waterfall. Arrive late; chicks fledge 45-49 days after hatching. • Uncommon; breeding colony in eastern Garfield County. Waterfalls in Clear, Willow and Cottonwood Creeks are potential habitat. Lewis's Woodpecker Melanerpes lewis • Riparian habitats, nests in old decadent cottonwoods • Uncommon; individual bird observed by WWE biologist in May, 2005 on Clear Creek above Buck Gulch (in Sect. 4) Williamson's Sapsucker Sphyrapicus thyroids • Mixed coniferous/deciduous forest at higher elevations, 2,300- 3,260 m (7,000-10,700 ft). Nests in cavities in trees, commonly in aspens or pines. • Uncommon: Confirmed breeder in Rio Blanco County including on the Roan Plateau. Gray Vireo Vireo vicinior • Open and drier pinon-juniper woodlands on rocky slopes at the lower elevation range of P -J habitats. Nests in junipers, especially those with protruding snags. • Uncommon: Confirmed breeder in extreme western Rio Blanco County. Pinyon Jay Gymnorhinus cyanocephalus • Ph -ion -juniper woodlands. Nests in pinons or junipers. • Common: Confirmed breeder in Rio Blanco and Garfield Counties, including on the Roan Plateau. Virginia's Warbler Vermivora virginiae • Dense shrublands and scrub forests of Gambel oak, pifion- juniper, mountain mahogany or ponderosa pine. Nests on the ground among dead leaves or with rock or log overhangs. • Common: Nesting has been confirmed in Rio Blanco and Garfield Counties including on the Roan Plateau. Black -throated Gray Warbler Dendroica nigrescens • Mature pinon-juniper woodlands. Nests on horizontal branches in pinon or juniper. • Common: Nesting has been confirmed in Rio Blanco and Garfield Counties including on the Roan Plateau. Sage Sparrow ttmphispiza belli • Large contiguous areas of low -elevation big sagebrush or sagebrushlgreasewood shrublands. Nests in sagebrush. • Uncommon: Breeding has been not been confirmed in Rio Blanco or Garfield Counties. 2.6 Procedures While no specific routes or techniques were used to survey for BOCC species, WWE biologists were ever vigilant for these species while watching cliffs and walking riparian areas and conducting other surveys. All songbirds observed were identified, either by visual reference or song, or by both methods. WestWater Engineering Page 9 of 24 pages 5/21/2007 All locations of birds were recorded using handheld GPS units and locations are reported as UTM coordinates (Datum: WGS84, Zone: 12S). 2.7 Observations The survey was conducted very early in the year; many neo -tropical migrants (songbirds) were just arriving at the end of April when the field work was terminated. Biologists noted a marked increase in the number of songbirds at the end of April. Four of the BOCC species listed above were observed by WWE biologists. Pinyon jays were recorded in mid-April and then again at the end of the month in PJ habitat in lower Clear Creek. Virginia's Warblers were seen on two dates at the end of April in lower Willow Creek and in the main canyon on the west side of Clear Creek at the mouth of Buck Gulch. A Black -throated Gray Warbler was observed on April 30 at the mouth of Tom Canyon. Although no Lewis's Woodpeckers were seen during this survey, WWE biologists are confident they are present in the Clear Creek area based on an observation by a WWE biologist during a previous survey. No nests of BOCC species were discovered. 3.0 Threatened, Endangered and Sensitive plant Species (TESS) 3.1 Background Information The occurrence and distribution of TESS are strongly influenced by geologic formations and the resulting soil types present in an area. Individual plant populations are scattered and usually only comprised of a small number of individual plants. This is primarily a result of specific soil and moisture requirements of each species and the high variability in the distribution and surface exposure of the layers within the formation. In the valley bottom and adjacent foothills in the lower portion of Clear Creek, three TESS plants could be found in the Wasatch Formation, particularly the Atwell and Shire members of the formation. DeBeque phacelia and adobe thistle require heavy clay soils subject to high levels of swelling and shrinkage. DeBeque milkvetch is often found on silt -clay soils which become hard - baked during the summer months. These three plants appear to be salt tolerant and may be associated with high selenium levels. The Atwell Gulch member of the Wasatch formation, which is comprised of reddish, heavy clay soils, is found in the mouth of Clear Creek, below Mt. Blaine on the west and Chimney Rock on the east. Plants associated with shale of the Green Rive Formation will likely occur at higher elevations on the ridges and steep slopes. Plants likely to occur on Green River shale include the Roan Cliffs blazingstar, sun -loving meadowrue and Parachute penstemon. Piceance bladderpod also prefers soils of the Green River Formation, but can be found on more gentle slopes and in areas with shale outcrops. Three species, Naturita milkvetch, hanging garden sullivantia, and Uinta Basin hookless cactus, are less influenced by specific geological formations. Naturita milkvetch appears to be more associated with sandstone outcrops and sandy/gravelly flow patterns below the sandstone layers. Suitable habitat is often found on soils derived from the Wasatch Formation, but may also be found on the soils of the Green River Formation. This plant has a greater range, occurring into southwestern Colorado, Utah and New Mexico. Distribution is limited to sandstone ledges and canyons. WestWater Engineering Page 10 of 24 pages 5/21/2007 Hanging garden sullivantia is restricted to hanging gardens which grow beneath waterfalls and on cliffs below seeps. Potential habitat in the Clear Creek drainage is at the heads of the steeper drainages and on cliffs with a permanent water source. Uinta Basin hookless cactus is found in areas with deep soils, and within diverse vegetation associations. It is not specific to soils derived from the Wasatch or Green River Formation. The potential habitat in Clear Creek is restricted to areas under 6,000 ft in elevation, which is the upper limit of its distribution (Spackman et. al. 1997). WWE biologists consulted the Colorado Rare Plant Field Guide (Spackman et al. 1997) to determine which species could possibly be present in Clear Creek. This reference, along with several years experience in field surveys for rare plant species, enabled WWE biologists to develop the list of plants contained in Tables 3 and 4 below. Table 3. Federally -listed Threatened, Endangered and Candidate Plant Species Scientific Common Name Name Status* Habitat Preference/Occurrence Penstemon Parachute debilis penstemon Phacelia DeBeque submutica phacelia Sclerocactus glaucus Uinta basin hookless cactus C • Endemic to Garfield County with only five known occurrences; sparsely vegetated, south facing, steep, white/pale orange shale talus in the Mahogany Zone of the Parachute Creek Member of the Green River Formation. Elev. 7,800-9,000 ft. • Found in the Anvil Points and Mt. Callahan area in the Bookcliffs overlooking I-70, east and west of the town of Parachute Colorado. • Chocolate -brown or gray clay on Atwell Gulch and Shire members of the Wasatch Formation; sparsely C vegetated steep slopes. Elev. 4,700-6,200 ft. • Closest known population is northeast of DeBeque, Colorado. • Typically xeric and fine textured Quaternary and Tertiary alluvium soils overlain with cobbles and pebbles; cold desert shrub and pifion-juniper communities along river benches, valley slopes and rolling hills. • Known populations occur within approximately 3 miles of DeBeque, Colorado. No known populations in the Clear Creek drainage. T * E= Federal Endangered, T— Federal Threatened, C= Federal Candidate WestWater Engineering Page 11 of 24 pages 5/21/2007 Table 4. BLM Sensitive Plant Species Scientific Name Common Name Habitat Preference/Occurrence Astragalus Debeque debequaeus milkvetch Astragalus Naturita naturitensis milkvetch Cirsium Adobe thistle perplexans Lesquerella pary fora • Varicolored, fine textured, seleniferous, saline soils of the Wasatch Formation -Atwell Gulch member. Elev. 5,100-6,400 ft. • Populations occur in Horsethief Canyon, southwest of DeBeque, Colorado. No known populations in the Clear Creek area. • Sandstone mesas, ledges, crevices and slopes in pinon juniper woodlands. Elev. 5,000-7,000 ft. • Closest known population, about 4 miles northeast of DeBeque, Colorado. • Barren clay outcrops derived from shales of the Mancos or Wasatch formations; open and disturbed sites in mixed shrubland and pinon-juniper woodland. Elev. 5,000-8,000 ft. • Extensive population within a 5 -mile radius of DeBeque. Population found south of the mouth of Riley Gulch in 2006. • Shale outcrops of the Green River formation; on ledges and slopes of canyons in open areas. Elev. 6,200-8,600 ft. Closest known population occurs on the West Fork of Parachute Creek. • Steep eroding talus slopes of shale, Green River formation. Elev. 5,800-9,000 ft. • Above the Left Fork of Roan Creek north of the mouth of Bear Gulch on the south slope of Horse Ridge along a dirt road 2 miles west of County Road 207 (Carr Creek Road). • Under waterfalls, hanging gardens on wet cliffs at elevations from 7000-10,000 ft. Various geologic formations. Several occurrences in Garfield County including East and West forks of Parachute Creek Sparsely vegetated open sunny steep shale talus slopes of the Green River formation Occurs in the Parachute Creek drainage Piceance bladderpod • Menzelia rhizomata Roan Cliffs blazingstar Sullivantia hapemanii Thalictrum heliophilum Hanging Garden • Sullivantia Sun -loving• meadowrue Threatened (T), endangered (E) and candidate (C) are status categories related the Federal Endangered Species Act. These designations are the responsibility of the FWS and are granted to species through a formal listing process. Candidate species are those for which the FWS has sufficient information on their biological vulnerability to support proposals to list them as threatened or endangered. Table 3 includes the federally listed species. Sensitive is a designation used by the BLM and FS. Sensitive plant species are designated by the BLM State Director using criteria found in BLM Manual 6840 and from consultation with BLM field offices, the FS and the Colorado Natural Heritage Program (CNHP) The BLM sensitive plant list does not duplicate those species that are on the federal T&E list but does include some species proposed for listing or considered as candidates for listing (Table 4). 3.2 Procedures Based on soil types and slope, WWE biologists searched likely areas for plants. Searches were conducted as late as possible in April to allow for plant growth. Wasatch soils near the mouth of Clear Creek were searched as well as steep slide areas in the Green River Formation. Biologists did not search every slide, but selected areas that were representative of the extensive steep talus slopes in the canyon(s). The locations of the TESS plants discovered during the searches were plotted on aerial photographs. Because the waterfalls in Clear Creek and its tributaries were still carrying spring runoff, an extensive search for hanging gardens sullivantia was not conducted. WestWater Engineering Page 12 of 24 pages 5/21/2007 All locations of TESS plants were recorded using handheld Guidance Positioning System (GPS) units and locations are reported as UTM coordinates (Datum: WGS84, Zone: 12S). 3.3 Observations Although searches were conducted as late as possible in April to allow for plant growth, primarily plant material from the 2006 growing season was discovered. Two of the ten TESS species described above were found. Roan Cliffs blazingstar (MERH) and sun -loving meadowrue (THHE) were found on many of the steep slides that were surveyed. Figure 3 illustrates the distribution of the plants that were discovered. Note that only a portion of the many talus slopes were surveyed. Because WWE biologists did not have access to the slide habitats in Doe Gulch, Deer Park Gulch and the small canyons on the east side of Clear Creek south of Deer Park Gulch, those areas could not be surveyed. Many comparatively small slides exist on the west side of Clear Creek and only a few of these areas were surveyed for TESS plants. WWE biologists feel that a more thorough survey of the west side would result in many more TESS plant discoveries, especially of Roan Cliffs blazingstar, which appears to prefer more eastern and north-eastern aspect, while sun -loving meadowrue appears to thrive in full sun exposures. The smaller, ephemeral waterfalls high in the cliffs on the west side of Clear Creek may also provide habitat for hanging gardens sullivantia. Photos 5 and 6 show the steep rocky slopes searched by WWE biologists and an example of the plant materials they found. Photo 5. Steep talus slope in upper Potts Creek, habitat for TESS plants WestWater Engineering Page 13 of 24 pages 5/21/2007 Photo 6. Roan Cliffs blazingstar: old plant material from 2006, note new green growth 4.0 Weeds Previous reports by WWE biologists (WWE 2006a, b) have documented severe infestations of weeds and invasive noxious plants in Clear Creek. These reports concentrated on the Clear Creek drainage below the confluence of Tom Creek. This survey allowed the entire drainage below the rims to be surveyed for weeds/noxious plants. 4.1 Procedures In conjunction with raptor nest searches in riparian habitat, TESS plant surveys on the steep hillsides and other biological surveys, WWE biologists conducted foot surveys for weeds throughout the length of Clear Creek. In many cases, species determination was based on last year's growth; in some cases, basal rosettes were also present. WWE biologists have extensive experience in plant identification; weeds species were identified after consulting Colorado Flora: Western Slope (Weber and Wittmann 2001) and Weeds of the West (Whitson 1996). All locations of weeds and noxious plants were recorded using handheld GPS units and locations are reported as UTM coordinates (Datum: WGS84, Zone: 12S). 4.2 Observations Table 5 provides a list of the weeds recorded by WWE biologists in Clear Creek and its tributaries. Weeds on the Garfield. County list, as well as those on all three lists (State A, B and C) published by the state of Colorado, plus one species known to be problematic by WWE biologists, are included. The table includes all species encountered by WWE biologists during WestWater Engineering Page 14 of 24 pages 5/21/2007 surveys in November, 2006 (WWE 2006a), except for cutleaf nightshade (Solarium triflortnn) and field bindweed (Convolvulus arvensis). Little of the foliage of these plants persists to the following growing season and the tiny plants emerging this spring were missed by WWE biologists. Table 5. Weeds observed in Clear Creek and its tributaries Plant Code Common Name Scientific Name Status* ARMI2 Common burdock Arctium minus C, G BRTE Chcatgrass Bromus tectorurn C CADR Hoary Cress/Whitetop Cardaria draba B, G CANU4 Musk Thistle Carduus nutans B, G CIAR4 Canada Thistle Cirsiwn arvense B, G CIIN Chicory Cichoriurn intybus C, G CIVU Bull Thistle Cirsium vulgare B CLOR Chinese clematis Clematis orientalis B CYOF Houndstongue Cynoglossum officinale B, G ERCI6 Redstem Filaree Erodium cicutarium B ONAC Scotch thistle Onopordum acanthium B, G SAIB Russian Thistle Salsola iberica N TARA Saltcedar Tamarisk ramosissima B, G VETH Common mullein Verbascum thapsus C Status: A = state "A" list; B = state"B" list; C = state"C' list; G = Garfield list; N = not currently listed but invasive and problematic in reclamation. Photo 7. Heavy infestation of common mullein on west side of Clear Creek just above Tom Creek WestWater Engineering Page 15 of 24 pages 5/21/2007 Houndstongue is the most widespread weed that WWE biologists encountered during the surveys. It is found from the heads of the drainages to the mouth of Clear Creek, in the riparian as well as on steeper hillsides. The four thistle species and common mullein are probably in next in order of occurrence, with some patches of mullein so thick that biologists reported it "feels like walking on a wooly carpet". Photo 7, above, illustrates one of the heavy infestations of common mullein. This report contains no map(s) of weeds because the distribution of weeds and noxious invasive plants in Clear Creek is so widespread. 5.0 Waters of the United States 5.1 Background Information Waters of the United States includes lands likely to be within the jurisdiction of the COE under Section 404 of the Clean Water Act. WWE biologists and Geographic Information System (GIS) specialist performed an evaluation of the property to identify lands that may be within COE jurisdiction during the course of the biological surveys. Waters of the United States includes wetlands and drainage courses (including streams, ephemeral drainages that connect to streams via surface flow or subsurface connection), ponds, lakes and springs. Clear Creek has many tributaries; some have active flows year-round, some carry water during the snowmelt/spring runoff, others carry water only during major storm events. A section of Clear Creek at the confluence of Tom Creek ceases to carry water during the late spring and summer. Surface flows reappear downstream, presumably from springs and subsurface flows. On many of the steep slopes on both sides of Clear Creek there are drainages that apparently carry significant volumes of water off the near -vertical cliffs and down to the valley floor. Many have prominent alluvial fans with no apparent stream channel that connects to Clear Creek. The water apparently is absorbed into the rocky, porous alluvial fan and is carried under the surface. 5.2 Procedures The GIS specialist for WWE used high quality aerial photographs, U. S. Geological Survey (USGS) topographic maps and Garfield County stream data to identify each drainage that appeared to connect with Clear Creek, either by surface flow or by suspected subsurface connection. In the field, WWE biologists recorded GPS locations of dry streambeds and active flows during surveys of riparian areas for weeds and wildlife species. When possible, the coordinates of the confluence of the dry streambed or side drainage with Clear Creek were recorded. 5.3 Observations Figure 4 illustrates the drainages that have been designated as possibly jurisdictional by WWE staff It includes active streams, dry streambeds and wetlands. Drainages are numbered from south to north; the figure shows that nearly 80 waterways may fall under the jurisdiction of the COE. Wetlands WWE biologists recorded four potential wetland sites. There is a small wetland (WE -1) populated with rushes and sedges just under the Gibler Ditch; just east of this site is an area on the hillside populated with tamarisk (WE -2). A third suspected site (WE -3) is on the east side of Clear Creek just north of Scott Gulch. It is a small fenced -in area with willow or tamarisk. The fourth wetland (WE -4) is adjacent to the main channel of Clear Creek below the confluence of WestWater Engineering Page 16 of 24 pages 5/21/2007 Buck Gulch near a head gate. The exact coordinates of WE -2 and WE -3 were not recorded because biologists suspected the sites were on Shell property. Streams, Drainages, Ponds At the time of survey, water was flowing in the main stem of Clear Creek for its entire length, in Tom Creek, in Cottonwood Creek and in Willow Creek. These drainages, in addition to several drainages that were already dry at the time of the survey, are included as jurisdictional waterways. In addition, there are several drainages that carry an appreciable amount of water, especially during major storm events that do not have an apparent confluence with Clear Creek. WWE biologists suspect that these drainages have a subsurface connection. Figure 4 includes streams with an active (persistent) water flow, dry streambeds with a discernable connection with Clear Creek, and dry streambeds that have no surface connection. Springs and seeps As mentioned above, a segment of Clear Creek dries up in late spring and summer, but then reappears further south. Biologists noted three seeps or springs (see wetlands above), but the abundance of water during the survey made detection of additional springs or seeps impossible. 6.0 Aquatic Habitat 6.1 Procedures While surveying riparian areas for weeds, raptor nests and BOCC, WWE biologists took note of the condition of the aquatic habitat in Clear Creek. No water quality, macro -invertebrate or fish sampling was conducted. 6.2 Observations Overall aquatic and riparian habitat conditions are deemed poor primarily because of historic overgrazing in the drainage. Creek banks are incised, eroded and unstable due to continual removal of streamside vegetation (Photo 8). Sedimentation and the resulting "cementing" of stream substrate are evident, resulting in poor aquatic invertebrate production. There is some cottonwood regeneration occurring in sections of the creek, but very few willows can be found resulting in reduced stream shading. Lack of shade over the stream increases water temperature, especially in late spring and summer when water flow decreases, resulting in reduced insect production. 7.0 Other Wildlife Observations During the course of the surveys in Clear Creek, many other wildlife species and sign were observed and recorded. Wild turkeys, elk, deer and a few snakes (bull and garter) added variety for the biologists. Turkeys and elk use the entire drainage; mule deer were concentrated in the PJ habitat near the mouth of the canyon. As mentioned above, the number of species and individual songbirds increased throughout the month of April. Biologists encountered fresh bear droppings in upper Clear Creek and in Sheep Creek. These sites provide excellent habitat for bears, with stands of chokecherry, oak and other food sources that are important, especially in the fall as bears attempt to gain weight prior to winter. WestWater Engineering Page 17 of 24 pages 5/21/2007 Photo K. Incised stream bank in middle Clear Creek; note tamarisk on stream's edge 8.0 Summary and Recommendations Biological surveys conducted by WWE biologists identified ten raptor species present in the project area and documented nesting by eight species of raptors. The presence of four non -raptor BOCC species was confirmed. Two species of TESS plants were observed and initial mapping of their distribution was accomplished. The widespread distribution of 14 species of weeds was recorded with several species occurring throughout the entire canyon. Waters of the United States were mapped. Although no intensive aquatic surveys were conducted, the overall condition of aquatic habitat in Clear Creek is deemed poor by WWE biologists. An abundance of wild turkeys, elk and other wildlife species was noted. The following sections provide recommendations for selected topics. 8.1 Raptors Activities associated with energy development in Clear Creek have the potential to impact raptor populations. In order to reduce the potential for impacts, it is important that construction and drilling activities be scheduled such that they do not interfere with breeding, nesting and brood - rearing activities. The following recommendations should be considered Best Management Practices (BMPs) for minimizing the effects of energy development on raptor populations. 8.1.1 Timing Limitations In areas of known raptor nesting, construction and drilling activities should not be scheduled between territory establishment and dispersal of young from the nest. If work is planned during the nesting season, areas of known and potential nesting should be inventoried by qualified biologists. Timing limitation restrictions should then be considered and applied to all active WestWater Engineering Page 18 of 24 pages 5/21/2007 nests. WWE recommends temporal and spatial restrictions for activities near active nests based on BLM stipulations (BLM 1997), Colorado Division of Wildlife (CDOW) recommendations (Craig 2002) and literature review of nesting season timing for raptors in the Roan Plateau region (Andrews and Righter 1992, Kingery 1998, Poole 2005). These recommendations are summarized in Table 6 and illustrated on Figure 2. Table 6. Timing limitations and NSO recommendations for active raptor nests Species Buffer Zone - NSO Seasonal Restriction Red-tailed Hawk 0.33 mile 1 March - 15 July Swainson's Hawk 0.25 mile 1 April - 15 August Sharp -shinned Hawk 0.25 mile 1 April - 15 August Cooper's Hawk 0.25 mile 1 April - 15 August Peregrine Falcon 0.5 mile 15 March - 31 July Prairie Falcon 0.5 mile 15 March - 31 July Golden Eagle 0.25 mile + alt. nests 1 January - 15 July Northern Harrier 0.25 mile 1 April - 15 August American Kestrel * * Flammulated Owl 0.25 mile 1 April — 1 August Northern Saw -whet Owl 0.25 mile 1 March — 1 August Northern Pygmy -Owl 0.25 mile 15 March - 15 July Long-eared Owl 0.25 mile 1 March - 15 July Great Horned Owl * * * American Kestrels and Great Horned Owls are relatively tolerant of human activity. Keep activity to a minimum during breeding season. 8.1.2 Habitat Fragmentation and Removal Fragmentation of wildlife habitat is a concern due to the rapid development of natural gas resources by a number of private companies. Habitat fragmentation is defined as an increased partitioning of intact vegetative communities that tends to reduce the suitability for wildlife occupancy. Fragmentation increases the potential for the establishment of non-native or invasive species which may out -compete preferred native species. When possible, new infrastructure should be constructed along existing pipeline and access road corridors to reduce habitat fragmentation in this area. Every effort should be made maintain the integrity of forested areas, both in the riparian zone and on north -facing hillsides, with an emphasis on protecting those areas where nesting is known to occur. Removal of trees containing raptor nests should be prohibited. 8.1.3 Future Monitoring Future monitoring of known nest sites as well as continued surveying for new sites by qualified biologists may allow insight into population trends and habitat requirements of species nesting in the region. Some portions of the drainage have not yet been thoroughly surveyed due to access and safety concerns. As development continues and access improves, these areas should be inventoried to allow implementation of BMP to minimize impacts on raptor populations. WestWater Engineering Page 19 of 24 pages 5/21/2007 8.2 Birds of Conservation Concern (BOCC) other than raptors Surveys later in the spring would allow BOCC species to arrive and establish breeding territories in the area. It is likely that additional BOCC species would be observed and nesting habitats could be delineated. 8.3 Threatened, Endangered and Sensitive Species (TESS) plants Surveys should be conducted later in the spring to allow for germination, flowering/fruiting of TESS plants, as well as searches in active and ephemeral waterfalls high on the canyon walls. 8.4 Weeds and Invasive Plants Weeds are so widespread in Clear Creek canyon that managers may feel there is no solution. However, weed reports previously written by WWE and cited in this report outline specific measures that can be taken to address the rampant weed issues in the drainage. 8.5 Waters of the United States To protect the integrity of Clear Creek waters and riparian habitat, precautions need to be taken when crossing or intersecting the waterways identified (Figure 4). Adequate barriers and filtration methods should be used to prevent and reduce soil from eroding into the water and riparian areas of Clear Creek and its tributaries. The Corps of Engineers should be consulted for Standard BMPs used in construction activities that intersect jurisdictional waterways. 8.6 Aquatic Habitat To better determine the current condition and potential for aquatic habitat(s) in Clear Creek, we recommend water quality assessment, a survey after runoff to determine which reaches of the stream maintain adequate flows, fish sampling and macro -invertebrate sampling. 8.7 Bears In recent years, the CDOW has experienced an increasing number of situations where conflicts have occurred between black bears and natural gas development. Most often incidents involve workers that have created problems at campsites (remote man camps) or around drilling sites where trash has not been protected and bears have been attracted in search of food. By their nature, black bears are not aggressive and prefer to avoid contact with humans. However, they are constantly searching for food and if they smell food trash, they can come in contact with humans. During times of drought or lack of seed/berry production due to frost, bears will be in a constant search for food. Intentional feeding of bears has occurred in the past and should never be allowed by employees. Intentional feeding almost always leads to unanticipated problems including direct contact with humans (human bites, breaking into cabins, trailers, trucks). In order to avoid bear problems, all potential sources of food attributable to workers should be eliminated from access by bears. Any trash containing food items produced on drilling sites and in man camps needs to be protected from bears. Removal of trash containing food items and bear -proof trash containers are two possible solutions. This requires aggressive and persistent action to eliminate the opportunity for bears to obtain food items in and around production sites. WestWater Engineering Page 20 of 24 pages 5/21/2007 Black bear problems are best prevented by proactive measures rather than attempting to solve an ongoing problem. The CDOW much prefers avoidance to problem management. 9.0 References Andrews, R., and R. Righter. 1992. Colorado Birds: A Reference to Their Distribution and Habitat. Denver Museum of Natural History, Colorado. BLM. 1997. Record of Decision and Approved White River Resource Area, Resource Management Plan. U.S. Bureau of Land Management, Meeker, Colorado. Craig, G.R. 2002. Colorado Division of Wildlife. Unpublished Report. Craig, G. R., and J. H. Enderson. 2004. Peregrine Falcon Biology and Management in Colorado 1973-200. Technical Publication No. 43, Colorado Division of Wildlife, Fort Collins, Colorado. Kennedy, P. L., and D. W. Stahlecker.1993. Responsiveness of nesting northern goshawks to taped broadcasts of 3 conspecific calls. Journal of Wildlife Management 57:249-257. Kingery, H. E. (editor).1998. Colorado Breeding Bird Atlas. Colorado Bird Atlas Partnership and Colorado Division of Wildlife, Denver. Poole, A. (Editor). 2005. The Birds of North America Online: http://bnabirds.cornell.edu/BNA/. Cornell Laboratory of Ornithology, Ithaca, NY Reynolds, R. T., R. T. Graham, M. H. Reiser, R. L. Bassett, P. L. Kennedy, D. A. Boyce Jr., G. Goodwin, R. Smith and E. L Fisher.1992. Management recommendations for the northern goshawk in the southwestern United States. General Technical Report RM -GTR -217, USDA, Forest Service, Rocky Mountain Forest and Range Experiment Station, Fort Collins, CO, USA. Spackman, S., B. Jennings, J. Coles, C. Dawson, M. Minton, A. Kratz, and C. Spurrier. 1997. Colorado Rare Plant Field Guide. Prepared for the U.S. Bureau of Land Management, the U.S. Forest Service and the U.S. Fish and Wildlife Service by the Colorado Natural Heritage Program. FWS. 2002. Birds of Conservation Concern 2002. U.S. Fish and Wildlife Service, Division of Migratory Bird Management, Arlington, Virginia, USA. Weber, W. A. and R. C, Whittmann. 2001. Colorado Flora: Western Slope. Third Edition. University of Colorado Press, Boulder, CO WWE. 2006a. Chevron Clear Creek 8 inch pipeline. Integrated Vegetation and Noxious Weed Management Plan, Garfield County Colorado. WestWater Engineering, Inc., prepared for Chevron/Texaco USA, December 2006. WWE. 2006b. Natural resource and wildlife concerns for natural gas exploration and development in Clear Creek canyon and the surrounding area. WestWater Engineering, Inc., prepared for Chevron/Texaco, USA, September 2006. Whitson, T. (editor) 1996. Weeds of the West. The Western Society of Weed Science in cooperation with the Western U.S. Land Grant Universities Cooperative Extension Services. University of Wyoming WestWater Engineering Page 21 of 24 pages 5/21/2007 )' nknoYrn GOiA1�oEa/ 'J' r. GO EA s 6, :,- ACC • it/vitas l) Figure 2: Chevron Clear Creek Raptor Nests & OwI Sightings Westwater Engineering May 2007 Miles 0 0.5 t ACC -P - Probable Accipiter AMKE - American Kestrel COHA - Coopers Hawk FLOW - Flammulated Owl GHOW - Great Horned Owl GOEA - Golden Eagle NSWO - Northern Saw -whet OwI PEFA - Peregrine Falcon RTHA - Red-tailed Hawk Unknown - Unknown Raptor Legend • OM Sgn7ngs Raptor Nest Status • .e«rre • mauve • Unknown Rahn+ Nevi euke.s =ELM Ai I Legend TESS Plants • Roan Cliffs blazingstar • Sun -loving meadowrue I BLM Figure 3: Chevron Clear Creek TESS Plant Locations Westwater Engineering May 2007 Miles 0 0.25 0.5 1 li s Figure 4: Chevron Clear Creek COE Jurisdictional Waters Westwater Engineering Miles 0 0.25 0.5 1 Legend • Possible Jurisdictional Waters • Wetlands - Garfield County Stream Data BLM Chevron MIDCONTINENT BUSINESS UNIT Skinner Ridge / Piceance Basin EMPLOYEE EMERGENCY ACTION PLAN (29 CFR 191 0.38) PROGRAM CONTENTS Statement of Policy Emergency Action Plan Scope Elements Alarm system Evacuation Training Appendix A Emergency Contact N Note: For reference purposed only - baseline "living" document. EPS specific information incorporated as project details are finalized. umbers Revised 9/25/2006 Statement of Policy Facility and personnel safety will always take precedence over maintaining operations. Personnel will not attempt to continue working on or remain at a location if the facility is in an unsafe condition. All personnel are authonzed to stop work if an unsafe condition posing an immediate hazard occurs. No reprimands will be given if the situation later proves less serious than thought. Hazards of a less serious nature should be brought to the attention of the supervisor who will assess the situation and initiate appropriate action. Under emergency response conditions, or drills, employees are expected to act only in accordance with their training. At no time will any employee place themselves, or allow themselves to be placed, into a life-threatening situation. The following priorities will govern our response to any emergency situation: 1. The safety of employees takes precedence over all other considerations. 1 We will minimize impact on the environment once the safety of all personnel has been secured. 3. We will endeavor to minimize damage to or loss of property and equipment, keeping safety and environmental concerns at the top of our priority list. Emergency Action Plan: Scope: This written plan covers the designated actions employees (Chevron & Contractors) associated with the Skinner Ridge Delineation Project (Pieance Creek/Debeque, Colorado) must take to ensure their safety from fire, bomb threats. gas leaks. severe weather, or other emergencies. Elements: Fires or other emergency situations should be verbally reported to the Chevron U.S.A. inc. person in charge (PIC) in the field location. If they are unavailable call (307) 783-9428where appropriate 9-1-1 should also be called to initiate public emergency response resources to report the incident. In the event that evacuation is required all employees shall evacuate per posted instructions (if applicable) and report to the following designated muster points Primary Muster Point: Hiner Gate (N39 Deg 32.474 W 108 Deg 19.518 Elevation 5839) Alternate Muster Point: Cowboy Chapel (N39 Deg 29.115 ft. W 108 Deg 19.705 ft Elevation 5506) Field Rally Point: Main Deer Camp approx. 2.1 miles north of Hiner gate on right hand side of road at log cabin. (N39 Deg 34,311 ft. W 108 Deg 20.776 ft Elevation 5985) Note: See attached map. Operator (Person In Charge) is designated to perform a final building check to ensure all temporary/portable office buildingls have been evacuated in the event of an emergency. Designated individuals will then remove the sign -in log and report to the muster point. Muster points will be discussed daily prior to job executions and will be carried over into night time operations should they exist. There are no critical operations at the Skinner Ridge Project/ Field that would require personnel to remain behind and operate. However, to minimize the dangers associated with an emergency, any trained employee may shut off the following energy sources after evacuating temporary office facilitiyls: Building Energy Type Utility Shut-off Location Temporary On -Site Office — Drilling or testis location. Electricity- Generator Propane/Diesel fired devices. Posted at entrance to Drilling rig location. Visitors are required to sign a logbook upon entering any field office or location whether permanent or temporary. They will be required to note the time of their arrival, work location, emergency contact numbers (if not already on file) and departure time from the facility. In the event of an emergency, Chevron personnel will use the logbook, verbal communication, cell or satellite phones and/or radios at the muster point to account for at personnel. If necessary, available, pre -designated personnel may initiate a search for any missing person as long as it is safe to do so. For Field Work sites, personnel present on location are noted by crew leaders and supervisors. Emergency muster points are pre -established and should be discussed daily before each job during (JSA) job safety analysis. In the event of an emergency, personnel will evacuate to the designated muster point where a headcount will be conducted. Employees who have been certified in First Aid/CPR and have received Bloodbome Pathogen training may render assistance to injured employees. For further information about this plan, contact the Charlie Eagler (HES Champion) at 307- 799-6314 (cell). If he cannot be reached, please contact George Badovinatz (Operations Supervisor) at 307-799-7217 (cell) / 307-783-3613 (office), Dave Howard (Facility Rep.) at 970-986-9823 (cell) / 970-283-1041 (office), or Fairl Dixon (Field Operations) at 970-379-6688 (cell) or 254-387-4949 (satellite). Alarm System: The only current active alarms will be designated "drilling rig" alarms and will be noted on the sign in sheet at rig site. Notification of an emergency situation may be given by using either of the following methods: Temporary Office Facility's • Verbally • Company Radio • Telephone/ Cell Field Offices and Field Work Sites • Verbally • Company Radio • Telephone/ Cell Evacuation: Employees shall follow the procedures noted below for evacuation in emergency situations: Emergency Bomb Threats Employee Action Evacuate to the Cowboy Chapel parking lot. Fire/Explosion Evacuate to the Cowboy Chapel parking lot. Gas Leak Evacuate to the Cowboy Chapel parking lot if possible or upwind of leak. High Winds, Thunderstorms or Tornadoes Seek immediate shelter in a non-hazordous location. All -Clear Signal: When employees have been evacuated from any buildingls or worksite/s, they may only be re-entered after it has been determined to be safe to do so by the designated on-site "Person in Charge". This may be done in consultation with local emergency responders or Chevron Management as appropriate. The Chevron designated onsite "Person In Charge" shall communicate the all -clear signal verbally to all affected employees. Training: Duties of individuals, trained to carry out the safe and orderly emergency evacuation of the Skinner Ridge Delineation Project Temporary officels or worksite/s are noted below: Position Duty All Employees Evacuate and assist others in leaving building/s or worksitels and reporting to muster point. Designated "Person in Charge" Make final sweep of building/s or worksite/s to insure that all rooms or sites are evacuated. Take building's sign -in log sheets to the muster point. Operations Supervisor (or designee) Oversee evacuation, direct additional response as appropriate. Determine when all -clear may be given. Reviews are conducted with employees covered by the plan at intervals noted below. Documentation of each review is contained in the Skinner Ridge temporary office/s located at the current site's of drilling operations. • Upon employee's initial assignment to the Skinner Ridge Project, employees receive training on this plan. • Whenever the employee's responsibilities or designated actions under the plan change. • Whenever the plan is changed. Documentation of each review is contained in the Skinner Ridge Temporary Office/s located at the Hiner Gate. Building evacuation drills will be conducted in accordance with local fire codes on an annual basis. Appendix A Skinner Ridge Emergency Contact Numbers CHEVRON PERSONNEL CHEVRON MCBU Management NariA Mk Ofho Ca Otl>Q Numbers Grote BadrnirIA 4 UF,rrn10.11. St.;wrisnr 307-78'-3613 :307-799-7217 Dae l-Irmanl Facility Representative 9711-283-19;1 970-986-93423 22.4,387-6297 KIM Dixon ( )prtalnr 9711-281-1011 9711-379-668H 22-4887-491.9 (This Bum- 10 16tir, Engineering 281.361-3918 872-111-1111.5 Sean Nnnis Environmental �xriaiist 970-257-114)01 971-271-7517 (rale Trise Mind, lLina4cr 281.561-71187 281-989-7229 254-210,5397 Charlie 173 k, 1 IFS CI cunpion 479-227-14710 $170-7734-49719 CHEVRON MCBU Management NariA Mk Ofho Ca Otl>Q Numbers ..S -au I) v, \MCItt Vicr President 281-361-3713 892x'21-1169 Neil I train IknierI Tslanmer 281-56141719 71:-72.3116 28I-'865-1I22Lazne \9ithas.] D -Bene O1iit>us Maua-rr 832x544599 307-6794950 281-491-071:1 home janrc. (lead 11ES l'r anager 281-361-5711 713-304-1.15I Jim Barnum General Manager 432-7277-7 1(11 432-238-9424 M.rk !lino. P/ill C'exxdinelnr 281.561-71187 281-989-7229 Nicole Johnson Iariline.sTe:nn teat! 581-361-3809 )71 713-302-2797 Slur !Astral*, Lea Counsel 281S61-3726 281-797;1718 281.582-1,218 fixer MCBU HES Support Staff Name Tide SA Other NumJ ers ('tri. 1 tam MTS (Slanipion lead 281-561-188.5 713-298.3769 IL ndv (:olden .Sr, Welt' Spx¢ ialia 281-561-485.1 718-826-180.1 Susie Luker Sr. Salify Slxrialiat 281-5611-3823 281-851.8890 Dave V,mu, Sr. Safi.' Sixrialia 281-561-3797 713-8.51=1251 I Juyd Rirlruxtx,n Ciallraclor Safely Six riaalis1 970-257-6093 9704 10;31815 Barer Bc•w,ou Environmental 1,tact 281-561-2089 713-211-927,1 11, 1,,, ['wain. Rater K \Va.t, Specialist 271-51,14366t 713,198-6096 Sara Stratton Air Sped:dist 271-5111:18:30 271-6:31-9272 Ken Jackson Rrrnd.tury/Fronting 281-561-4991 281-133-04i66 O,,ar Ouimz 1H )17P.95-1 Coordinator -1.712-766-8801x610 •1732-2:38-7071 4 5 Non -Chevron Assistance Government Ageacie, Find Aid, and Municipalities Emergency Public Service Company of Colorado Sheriffs Departments Garfield County Mesa County Federal Bureau of Investigation Town of DeBeque Town Marshall Mesa County Dispatch Debeque Fire Department Fire Chief — Nick Marx Cell Phone Grand ,!unction Hospital Si Mary's CareFlight in the event St. Mary's Careffight is needed, also be notified as a backup. BLM To report a fire Colorado DEQ Forest Service OSHA COGCC Parachute Office COGCC Debeque Office Weather Services Recorded Weather Worker's Compensation Contract Construclion Companies Flint Construction Elkhorn Construction Hyland Enterprise Compression Other Municipalities Town of Parachute Town of Rifle Rifle Fire Department Non -Emergency Glenwood Springs Hospital Rifle Hospital 6 911 (800)772-7858 (970)-945-0453 (970)-244-3500 (970)-242-8360 (970) 823-5531 (970)-2835146 (970 241-6704 {970) 283-8632 (970) 261-3305 (970) 2442273 (800) 332-4923 the Debeque Fire Department must (970)-244-3000 (970)-257-4600 (877)-518-5608 (970)-242-8211 (303)-844-1600 (970)-265-9000 (970)-283-8635 (970)-243-7007 (970)-243-0914 (970)-248-7347 (970) 625-4265 (970) 625-4160 (970)625-8270 (970) 285-7630 (970) 625-2121 (970) 625-1220 (970)9456535 (970)625-1510 Piceance Basin Skinner Ridge Project Hazard Elimination / Safety Plan Note: For reference purposes only - baseline "living" document. EPS specific information incorporated as project details are finalized. 1.0 INTRODUCTION This chapter of the HES Plan describes lines of authority, responsibility, and communication as they pertain to health and safety functions at this site. The purpose of this chapter is to identify Me personnel who impact the development and implementation of the site health and safely plan and to describe their roles and responsibilities. This chapter also identifies other contractors and subcontractors involved in work operations and establish the lines of communication among them for safety and health matters. The organizational structure of this site's HES program is consistent with Injury and Illness Prevention Program, and the MCA Safety Programs ▪ Compliance • Communication • Hazard Assessment • Training and Instruction • Recordkeeping 1.1 Roles and Responsibilities All personnel and visitors on this site must comply with the requirements of this Plan. The specific responsibilities and authority of management, safety and health, and other personnel on this site are detailed in the following paragraphs. A site organizational chart dlustrahng the hierarchy of personnel and lines of communication within this company and with additional contractors on site is found In Figure 1-1. Project Manager (PM) The PM has responsibility and authority to direct all work operations. The PM coordinates safety and health functions with the local Area Management and HES Specialist. has the authority to oversee and monitor the performance or all workers, and bears ultimate responsibility for the proper implementation of this Plan. Site Supervisor The Site Supervisor is responsible for Tied operations and reports to the Project Manager (PM). The Site Supervisor ensures the implementation of the Plans requirements and procedures in the Feld. The specific responsibilities of the Site Supervisor are: Executing the work plan and schedule as detailed by the PM and Coordination with the HES Speciaiisl an safety. environmental, and health issues: Site Workers Site workers are responsible for complying with this Plan, using the proper PPE. reporting unsafe acts and conditions, and following the work and safety and health instructions of the Project Manager (PM), and Site Supervisor. 1.2 Identification of Other Site Contractors The other contractors and subcontractors on this site who could be affected by the tasks and operations associated with this work plan are listed in Table 1-2 below. Table 1-2 Other Site Contractors and Subcontractors Company Function TBD Health & Safety Flint Construction Construction Hyland Trucking Waste Water Cordilleran and ERM Environmental Testing Washington Group and PAI Engineering Project Engineering TBD Sampling Lab Per Plan Waste Disposal TBD Ultrasonic Testing TBD Construction Inspection TBD - - Pipe TBD Vaive Vaull TBD Valves & Fittings TBD Nitrogen Waste Management Waste Containers TBD X -Ray Services Hyland Trucking Vac Trucks TBD Coating Inspection TBD Hydro Inspection Hazards Communications This chapter of the Plan describes the safety and health hazards associated with site work and the control measures selected to protect workers. The purpose of a Job Hazards Analysis (JHA) and Job Safety Analysis (JSA) is to identify and quantify the health and safety hazards associated with each site task and operation. and to evaluate the risks to workers. Using this information, appropriate control methods are selected to eliminate the identified risks if possible. or 10 effectively control them. The control methods ere documented in each task -specific JSA. and phase -specific JHA. • Hazards Communications Program • Employee Notification • Job Hazard Analysis • Job Safety Analysis 2.1 Hazard Communications Program • Located In Fllenet Oceument Management System h tto:lle va idm we b O 1 li d cows l h om e. a so Piceance I HES 1 Safety / Plans. Programs. Procedures. Processes / Programs and Procedures Specific PHA's (Compressor, and Pad Protection) can be located in Filenet under the Analysis Folder 2.2 Employee Notification of Hazards and Overall Site Information The information in the JHA's and JSA's and the available MSDS's are made available to all employees who could be affected by it prior to the time they begin their work activities. Modications to JSA's and JHA's are communicated during routine briefings such as TIF 1 Tailgate Safety Meetings, Chevron shall also inform other contractors and subcontractors about the nature and level of hazardous substances at this site. and the likely degree of exposure to workers who participate in site operations with the TIF forms copied in the Contracts. 2.3 Job Safety Analysis (JSA) A JSA is a planning tool that identifies all hazards and safeguards associated with each step or task. These shall be shared with aid affected parties associated with these tasks. JSAs shall be modified if: • the scope of work is changed by adding. eliminating. or modifying tasks • new methods of performing site tasks are selected • observation of the performance of site tasks results in a revised characterization of the hazards • new chemical. biological, or physical hazards are identified • exposure data indicate changes in lice Concentration andlor likelihood of exposure • new/different control measures are selected • Approved Blank JSA form can be found at 0 Drive / NAU ! 'NICBU V Major Capital Projects 1 Piceance / FLD-Skinner Ridge 1 HES / HES Champion Files / Piceance / Blank HES Forms / Safety / New Complex JSA2 2.4 Job Hazards Analysis (JHA) A JHA is a planning tool that does a high level identification of hazards associated with phases of the project. • Tables attached in Table 2.1 3 4 Table 2-1: Site -Specific Job Hazard Analysis Operational Phase Phase No. Task/Operation Location Where Task/ Operation Performed Mobilization 1 Set up site controls and services On-site Person Certifying This JIiA Date This JHA Conducted 3212007 Print Name Signature Chemical Hazards Chemical Name Source Concentration Exposure Limit No anticipated chemical hazards N/A N/A N/A Physical Hazards Name of Physiscal Hazard Source Exposure LeveUPotential Exposure Limit Hand Tool Use Silt fence installation Likely N/A Heat (ambient) Environment Likely N/A Heavy Manual Lifting/Moving Likely N/A Inclement Weather - Lightning and High Winds Likely N/A Material Handling Stage supplies Likely N/A Noise (Sound Pressure Level), dBA Hammering 85 dBA 90 dBA Rough Terrain Walking surface Likely N/A StpsITrips/Falls Uneven ground Likely N/A Traffic On or Near Site Roadways Likely N/A Vehicular Travel Construction traffic Likely N/A Biological Hazard Name of Biological Hazard Source Exposure Potential Hantavirus - Small Mammals/droppings Mice Unlikely Histoplasmosis - Bib Droppings/Bat Guana Suds Unlikely Insect bites and slings Bees Likely Lyme Disease - Ticks Ticks Likely Poison Plants (Ivy. Oak, and/or Sumac) Plants Likely Control Measures Used Engineering Controls: Only trained. medically qualified Individuals may be present al this site. All work is In be n accordance kith Chevron Pipe Lire's HES Procedures: HES-102 General Safe Work HES-204 Safe Work HES-501 Personal Protective Equipment HES -202 Excavation Procedure HES- 203 Isolation of Equipment for Work Procedure HES -205 Hot Work Procedure Work Practices, Workers shall adhere to work practice controls outlined in the contractors health and safely procedures and Standard OperatingProcedures. All work practices must comply or exceed Chevron Pipeline HES Policies. Level of PPE: 0 Respirator Cartridge/Canister: Not Applicable Service Life: Not Applicable Task -Specific Modifications: None PPE Upgrade: No PPE Downgrade: No Table 2-1: Site -Specific Job Hazard Analysis Operational Phase Phase No. Task/Operation Location Where Task! Operation Performed Excavation 2 Open Pipe Trench On -Site Person Certifying This JHA Date This JHA Conducted 3!2!2007 Print Name Signature Chemical Hazards Chemical Name Source Concentration Exposure Limit Likely Poison Plants (Ivy, Oak, and/or Sumac) Plants Likely Control Measures Used Engineering Controls:Only trained. medically qualified individuals may be present at this site. All wwk is to be in accordance with: HES-102 General Safe Work HES-204 Safe Work HES-501 Personal Protective Equipment Work Practices: Workers shall adhere to work practice controls outlined in! HES-102 General Safe Work All work shall be under the controls stipulated in the safe work permit system; HES-204 Safe Work Employees shall don personal prolective equipment in accordance with; HES-501 Personal Protectve Equipment Level of PPE: 0 Task -Specific Modifications: None 100 ppm PEL-TWA OSHA Physical Hazards Name of Physical Hazard Source Exposure Level/Potential Exposure Limit Heat (ambient) Pipeline right of way Likely N/A Earth Moving Equipment Operations Excavation Likely N/A Hand Tool Use Excavation Likely N/A Heavy Equipment Operation Site activity Likely N/A Heavy Manual Lifting/Moving Setting shoring Likely NIA Inclement Weather — Lightning and High Winds Environmental Likely N/A Ladder Use Excavation egress Likely N/A Lifting Equipment Operation- Cranes Placing shoring Likely NIA NOISE (SOUND PRESSURE)-, dBA Equipment 005 dBA 90 dBA TWA OSHA Slips!Trips/FallS Uneven terrain Likely N/A Biological Hazard Name of Biological Hazard Source Exposure Potential Bloodbome Pathogens (Hepatitis 5 or C, HIV) Mice Unlikely Histoplasmosis - Bird Droppings(Bat Guano Birds Unlikely Insect bites and stings Bees Likely Lyme Disease - Ticks Ticks Likely Rabies - Small Mammals Small mammals Likely Poison Plants (Ivy, Oak, and/or Sumac) Plants Likely Control Measures Used Engineering Controls:Only trained. medically qualified individuals may be present at this site. All wwk is to be in accordance with: HES-102 General Safe Work HES-204 Safe Work HES-501 Personal Protective Equipment Work Practices: Workers shall adhere to work practice controls outlined in! HES-102 General Safe Work All work shall be under the controls stipulated in the safe work permit system; HES-204 Safe Work Employees shall don personal prolective equipment in accordance with; HES-501 Personal Protectve Equipment Level of PPE: 0 Task -Specific Modifications: None Table 2-1: Site -Specific Job Hazard Analysis Operational Phase Phase No. Task!Operation Location Where Task! Operation Performed Welding 3 Pipeline fabrication On-site Person Certifying This JSA Date This JHA Conducted 3/2/2007 Print Name Signature Chemical Hazards Chemical Name Source Concentration Exposure Limit No Chemical Hazards() Exposure Limit No Chemical Hazards() Physical Hazards Name of Physical Hazard Source Exposure LevellPotential Exposure Limit Non -ionizing Radiation Welding Likely NIA Welding/Cutting/Burning Pipe fabrication Likely N/A Hot Surfaces Welding Likely NIA Biological Hazard Name of Biological Hazard Source Exposure Potential Poison Plants (Ivy, Oak, andlor Sumac) Plants Likely Control Measures Used Engineering Controls: Only trained, medically qualified indimduals may be present at this site. All work i5 to be in accordance with HES-102 General Safe Work HES-204 Safe Work HES-501 Personal Protective Equipment Work Practices: Workers shall adhere to work practice controls outlined in: HES-102 General Safe Work All work shall be under the controls stipulated In the safe work permit system; HES-204 Safo Work Employees shall doapersonal prolective equipment m accordance with, HES-501 Personal protective Equipment Pigging air release Level of PPE: 0 Respirator Cartridge/Canister: Not Applicable Service Life: Not Applicable Task -Specific Modifications: Table 2-1: Site -Specific Job Hazard Analysis Operational Phase Phase No. Task/Operation Location Where Task/ Operation Performed Welding 4 Hydro -testing On -s40 Person Certifying This JHA 0515 This JHA Conducted 3/2/2007 Print Name Signature Chemical Hazards Chemical Name Source Concentration Exposure Limit No Chemical Hazards() Physical Hazards Name of Physiscal Hazard Source Exposure Level/Potential Exposure Limit Compressed Gas - Storage and Use Pigging Likely N/A Electrical Coating testing Likely N/A Excavation/Trenching Operations Testing in trench Likely N/A Hand Tool Use Shrink fit cutting Likely NIA Hot Surfaces Shrink fit Likely NIA NOISE (SOUND PRESSURE LEVEL). dBA Pigging air release e90 dBA 90 ISA TWA OSHA Slips/Trips/Falls Uneven ground Likely NIA Working Over Water Unlikely Biological Hazard Name of Biological Hazard Source Exposure Potential Insect bites and stings Bees Likely Lyme Disease - Ticks Ticks Likely Poison Plants (Ivy, Oak. and/or Sumac) Plants Likely Control Measures Used Engineering Controls: Only trained, medically qualified individuals may be present al this site. All work is to be in accordance with: HES-102 General Sale Work HES-204 Safe Work HES-501 Personal Protective Equipment Work Practices: Workers shall adhere to work practice controls outlined in: HES-102 General Sate Work 10 All work shall be under the controls stipulated m the safe work permit system', HES-204 Safe Work Employees shall don personal protective equipment In accordance with', HES-501 Personal Protective Equipment Level of PPE: D Respirator Cartridge/Canister: NO1 Applicable Service Life: Not Applicable Task -Specific Modifications: None PPE Upgrade: Nu 5 Final grade site On-site PPE Downgrade: No Person Certifying This JHA Date This JHA Conducted 3/212007 Print Name 11 Table 2-1: $iteSpecific Job Hazard Analysis Operational Phase Phase No. Task/Operation Location Where Task/ Operation Performed Ste closure 5 Final grade site On-site Person Certifying This JHA Date This JHA Conducted 3/212007 Print Name Signature Chemical Hazards Chemical Name Source Concentration Exposure Limit NO Chemical Hazards() Physical Hazards Name of Physical Hazard Source Exposure Level/Potential Exposure Limit Earth Moving Equipment Operations Final grading Likely N/A Traffic - On or Near Site Roadway Likely N/A Biological Hazard Name of Biological Hazard Source Exposure Potential No Biological Hazards Unlikely Control Measures Used Engineering Controls: Only trained, medically qualified individuals may be presort at this site, All work is to he in accordance with: HES-102 General Safe Work HES-204 Safe Work HES-501 Personal Protective Egvuipment Work Practices: Workers shall adhere to work practice controls outlined in: HES-102 General Safe Work All work shall be under the controls stipulated in the safe work permit system', HES-204 Sate Work Employees shall don personal protective: equipment in accordance with: HES-501 Personal Prctecl'rne Equipment Level of PPE: 0 Respirator Cartridge/Canister: Not Applicable Service Life: Not Applicable Task -Specific Modthcations: None PPE Upgrade: No PPE Downgrade: No 12 Table 2-1: Site -Specific .Job Hazard Analysis Operational Phase Phase NO. Task/Operation Location Where Task! Operation Performed De -mobilization 6 Demobilize equipment On-sile Person Certifying This JHA Date This JHA Conducted 381200! Print Name Signature Chemical Hazards Chemical Name Source Concentration Exposure Limit No Chemical Hazard$Q Physical Hazards Name of Physical Hazard Source Exposure Level/Potential Exposure Limit Hand Tool Use Dismantle equipment Likely N/A Heat (ambient) Environment Likely N/A Material Handling Demobilize unused supplies Likely N/A Slips/Trips/Falls Uneven ground Likely N/A Biological Hazard Name of Biological Hazard Source Exposure Potential Insect bites and stings Bees Likely Poison Plants (Ivy, Oak, andfor Sumac) Plants Likely Control Measures Used Engineering Controls. Only trained, medically qualified individuals may be present et this site. All work is to be in accordance with. HES-102 General Safe Work HES-204 Safe Work HES-501 Personal Prolective Equipment Work Practices, Workers shall 0060/010 work practice controls outlined in: HES-102 General Safe Work All work shall he under the controls stipulated in the safe work permit system; HES-204 Safe Work Employees shall don personal protective equipment in accordance with; HES-501 Personal Protective Equipment Level of PPE: 0 Respirator Cartridge/Canister: Not Applicable Service Life: Not Applicable Task:Specific Modifications: None PPE Downgrade: No PPE Upgrade: No 13 3.0 SiTE CONTROL This site control program is designed to faciktate emergency evacuation and medical care, to prevent unauthorized entry to the site, and to deter vandalism and then The site control program provides the following site-specific information: site access procedures site security both internal (on-site) and external communications 3.1 Site Map A map of this site. showing site boundaries. designated work zones. and points of entry and exit is provided in Figure 3-1, at the end of this chapter. 3.2 Site Access Access t0 this site is restricted to reduce the potential for exposure to its safety and health hazards. During hours of site operation, site entry and exit is authorized only at the point(S) identified in Figure 3-1. Entry and exit at these points is contmlied by Chevron personnel. All entrants must sign in at the check in location upon arrival and must sign out when they leave the site (each time). This will assist accounting for personnel in case of an emergency and not put personnel in danger by having them look for someone that isn't at the site. Visitors to the site register with Project Manager, and are escorted at all times. Visitors are expected to comply with the requirements of this Plan. In case of an emergency they will stay with the Chevron person that is escorting mem to the staging locations. PPE For visitors is provided by Chevron. If Contract workers need to be on the Chevron properties after Chevron personnel go off shift there must be a process in place to insure they are accounted for each day. • They must have a Chevron contact person designated • They must have a Representative from their company that is their point person • They must follow proper check in f check out pro0edure for the site • They must communicate their planned work locations 10 the appropriate Chevron site personnel daily to insure they are working in safe locations and to help if search response becomes necessary. The personnel on site after normal work hours and without Chevron on site Supervision must contact their Companies point person after leaving our site as a cheCk out. If by a set time they don't contact their Representative that person will contact the Chevron contact person to set a search response into place. It is important 10 know the general work location and travel plans to aid in the search response. 3.3 Site Security Security at this site is maintained during both working hours and 00n -working hours to prevent unauthorized entry; exposure of unauthorized, unprotected people to site hazards; and increased hazards due to vandalism and theft. Site Personnel are responsible for establishing and maintaining site security during working hours. This site takes the following measures for security during working hours: . Access gates on roads to the well locations that are locked during the hours that personnel aren't on site. 14 3.4 Site Communications The following communication equipment is used to support on-site communications: • Telephones at this site are located in the following areas: Approved employee cell phones following MCA Guidelines. Phone at the Hiner Gate office location. Satellite phones for some employees • A current list of emergency contact numbers is posted in the following locations: Office trailer • Two-way radios are available in the following locations: Equipment trailer • The following people will carry two-way radios: Site supervisor Field Leads Resource Individuals In addition, site personnel are trained to recognize and use hand Signals when visual contact is possible but noise or PPE inhibit voice communication. These hand signals are listed below in Table 2 Table 2 Communications -- Hand Signals Signal Meaning Clutching throat Out of air/cannot breathe Thumbs down No Thumbs up OKlunderstood Both arms waving upright above head Need assistance/send support Stand with hands on waist or grab partner's wrist Exit Immediately One fist raised above head Stop immediately_ Arms horizontal and circling out to sides Situation under control 15 3.5 Site Communications for Emergency The nearest emergency medical assistance selected to support Government Agencies, First Aid, and Municipalities Emergency Public Service Company of Colorado Sheriffs Departments Garfield County Mesa County Federal Bureau of Investigation Town of DeBeque Town Marshall Mesa County Dispatch Debeque Fire Department Fire Chief— Nick Marx Cell Phone Grand Junction Hospital St. Mary's CareFlight in the event St. Mary's Careflight is needed, the Deb also be notified as a backup. BLM To report a fire Colorado DEQ Forest Service OSHA COGCC Parachute Office COGCC Debeque Office Weather Services Recorded Weather Worker's Compensation this site is: 911 (800) 772-7858 (970)-945-0453 (970)-2443500 (970)-242-8360 (970) 823-5531 (970)-283-5146 (970) 241-6704 (970) 283-8632 (970) 261-3305 (970) 244-2273 (800) 332-4923 eque Fire Department must Contract Construction Companies Flint Construction Elkhorn Construction Hyland Enterprise Compression Other Municipalities Town of Parachute Town of Rifle Rifle Fire Department Non -Emergency Glenwood Springs Hospital Rifle Hospital (970)-244-3000 (970)-257-4800 (877)-518-5608 (970)-242-8211 (303)-844-1600 (970)-285-9000 (970)-283-8635 (970)-243-7007 (970)-243-0914 (970)-248-7347 (970) 625-4265 (970) 625-4180 (970) 625-8270 (970) 285-7630 (970) 625-2121 (970) 625-1220 (970) 945-6535 (970) 625-1510 16 Figure 3-1 Map of Site Boundaries, Work Zones. and Entry/Exit Points T2s a•rx Total Area -160 acres 2640' crounm.nw Monkerlr4 wells Ttlt•ws• b•••r.o watt; alev4 fsctwnoq stage • 1600' • a HrbreTest 151 11111141n: SugpIY 0 Gas In)ecdon Commissar 4[0!50 Li Road Prodck:ed Water Storaq Tank • • ' shapon r grape Aruc'. • 0 • 111. el UM nitial Pilot Area - - - Central injection wellr surrounded by producing wells and groundwater monitoring wells Liquid/Gas Separator Column T3S R41W. NO 1(q 5.41. 5 Mat Test Area micro. 60 acres 4.0 PERSONAL PROTECTIVE EQUIPMENT This chapter of the Plan describes how personal protective equipment (PPE) is used to protect against employee exposures to hazardous substances and hazardous conditions on this site. Exposure hazards from the decontamination process are also considered. The following topics are addressed in this chapter: • PPE selection criteria • Site-specific PPE assessment • Use Of PPE • Training in use of PPE • Respiratory protection • Heanng conservation • PPE maintenance && storage 4.1 PPE Selection Criteria Site safely and health hazards are eliminated or reduced to the greatest extent possible through engineering controls and work practices. Where hazards are still present. a combination of engineering controls. work practices. and PPE are used to protect employees. An initial level of PPE s assigned to each task to provide an adequate bamer to exposure hazards. Initial PPE ensembles are selected based on the anticipated route(5) 01 entry of the hazardous substances on site and their concentration. Ensemble malenals are selected using permeation data supplied by individual manufacturers. Matenals providing the greatest duration of protection have been chosen. When necessary. multiple layers of protection are used to accommodate the range of hazards that may be encountered. Where possible, employees are provided with a range of component sizes to ensure properly fitted PPE. 4.2 PPE Assessment • Located in Filenet Document Management System http.11evd Smwebelfadrlwschome.aso Piceance f HES 1 Safety/ Plans, Programs, Procedures. Prooesse51 Hazards Analysis 4.3 Training Employees receive general information regarding proper selection. use and inspection of PPE during initial orientation training. 4.4 Respiratory Protection Respiratory Protection should not be necessary during normal operations at this site. The potential to wear dust masks will be reviewed if the issue arises. 4.5 Hearing Conservation Employees must use hearing protection when noose exposures equal or exceed an 8 -hour time -weighted average sound level of 85 dBA. Where noise exposure meets or exceeds this level. noise is listed as a physical hazard in the JSANJHA for the tasksloperation. and hearing protection is included as one of the control measures (PPE). 4.6 PPE Maintenance & Storage In order to ensure that PPE continues to provide the anticipated protection, this site uses specific procedures for PPE inspection, cleaning, maintenance, and storage. Adherence to these procedures is 17 18 (racked with written inspection records. 4.7 Use of PPE Site-specific PPE ensembles and matenals are Identified below in Table 4.23. PPE is used in accordance with manufacturers' recommendations. Table 4-2a SiteSp3Clfic PPE Ensemble Equipment Model Material Employee Purchased Level D Covera115f$tendard Work Cloches _ T ek Polypropylene or equivalent No Beets/shoes, chemical -resistant 5teeI toe and shank Vanes Leather or synthetic _ No Escape Mask: N/A Beets. cuter. chemical -resistant (disposable) When in contact with contaminated soils Chemically resistant disposable No Safety glasses Z87 compliant Plastic or synthetic materials No Hard hat ANSI approved Plastic or synthetic materials No Face shield used in conjunction with goggles or spoggles While grinding Or0amin3teg contaminated liquid Plastic No Claves Leather Work Gloves Nitrile 1 Butyl Mix Gloves __ Abrasion resistant Use with Solvents No 5.0 ENVIRONMENTAL MEDICAL CONDITION PREVENTION PROGRAM This section of the Plan describes how the site-specific environmental conditions (temperature, humidity, air movement), work loads. and PPE may expose workers to hazards resulting in injury or illness related to Hot or Cold Conditions. • Utilize the OSHA Quick Card Guidelines for response to Heat related Issues and get information from following web sites; c Ifftp-llwww.osha.doviSLTC/heatstressAndex.html o hila:!!www.0sha.qov/PublsCations/osheat54.Ddf o http:Nwww.CdC-oOvfniosh/topics/heatstress/ • Utilize the following links to gain information on cold related illnesses and hazards; o http'llwww.webmd.comla-to-z-qurdes/Hyoothermia-and-Cold-Temoerature- Exoosu re-Tooic-Overview o http-lfwww.orinceton.edul oalsalety/hypoCold. shim! o htto llwww.westchesteroh.orofffirefhypo frostbite odf http:lwww.osha.pow/plsfoshaweblowadisp.show document?p fable=FACT SHEETS&o id= 186 6.0 SPILL CONTAINMENT PROGRAM This section of the Health and Safety Plan describes the potential for hazardous substance spills at this site and procedures for controlling and Containing such spills. The purpose Of this section of the Plan iS l0 ensure that spill containment planning is conducted and appropriate control measures are established. The spill containment program addresses the follovnng elements: • Potential hazardous substance spills and available controls • Enifial n0tifc31i1n and response • Spill evaluation and response • Post -spill evaluation 6.1 Potential Spills and Available Controls An evaluatorwas conducted to determine the potential for hazardous substance spills at this Site. That evaluation indicates that there i5 no potential for a hazardous substance spill of sufficient size to require containment planning. equipment. and procedures. For that reason. no spill containment program is implemented at this site. 19 20 7.0 EMERGENCY RESPONSE PLAN This is the site-specific emergency response plan. This chapter of the Health and Safety Plan describes potential emergencies at this site. procedures for responding to those emergencies, roles and responsibilities during emergency response, and training that workers must receive in order to follow emergency procedures. This plan also descnbes the provisions this site has made to coordinate its emergency response planning with other contractors on site and with off-site emergency response organizations. This emergency response plan provides the following site -Specific information: • pre -emergency planning • on site equipment • maps • roles and responsibilities • alerting and evacuation • response • emergency medical treatment and first aid • training • fire management • Chevron contact list 7.1 Pre -emergency Planning This site has been evaluated for potential emergency occurrenceS. based on she hazards. the tasks within the work plan, the site topography, and prevailing weather conditions. The results of that evaluation are shown in Table 7-1 below. Table 7-1 Potential Site Emergencies Type of Emergency Source of Emergency Location of Source Fire Ruptured Service lines (gas, electric In right -of way Explosion Ruptured service lines (gas, electric) In right-of-way Cave-in Excavation In right-of-way Collision (person/equipment or equipment/equipment) Operator error Work Site Spill Ruptured service lines (roaS. electric) In excavation Earthquake Environmental occurarce Entire she Flood Weather Entire site Lightning Weather Entire site Acute chemical exposure Ruptured service lines (gas, electric) In excavation Heat stress/worker collapses Heat Entire site Leaking supply line Ruptured service lines (gas, electric) In right-of-way 21 7.2 OnSite Emergency Response Equipment Emergency procedures may require specialized equipment to facilitate worker rescue, contamination control and reduction, or post -emergency clean-up. Emergency response equipment stocked on this site is listed in Table 7-2. The equipment inventory and storage locations are based on the potential emergencies described in Table 7-1. This equipment inventory is designed t0 meet on-site emergency response needs and any specialized equipment needs that off-site responders might require because of the hazards at this site but not ordinarily stocked. Any additional PPE required and Sleeked for emergency response is also listed in Table 7-2 below. At a minimum. personal protective equipment used by emergency responders will comply with Chapter 4, Personal Protective Equipment, of this Plan. Emergency response equipment is inspected at regular intervals and maintained in good working order. The equipment inventory is replenished a5 necessary to maintain response Capabilities. Table 7-2 Emergency Equipment &Emergenc y PPE Emergency Equipment Specific TypeLocation Quantity Stocked Stored Berm materials Native soils First aid kit Sufficient ke personnel al site Same Fire extinguisher Trailers, heavy equipment hot work areas Min. of 1 at each listed location Varies Emergency eye wash Portable Minimum of 1 Equipment Trailer Emergency PPE Specific Type Quantity Stocked Location Stored Tyvek suit, coaled Tyvek or equivalent 20 in various sizes Equipment trailer Glovos Nitrile Eye protection 257 22 7.3 Emergency Planning Maps Figure 7-3 provides a map of the site with key on-site emergency planning information clearly marked. Emergency evacuation route(s), places of refuge, assembly point(s). and the locations of key site emergency equipment are identified on this map. Major topographical features and the direction of prevailing windslweather conditions that could affect emergency response planning are also marked on this Map. Figure 7-3a is posted at site entry points and at locations throughout the work area. 7A Roles and Responsibilities for On -Site and Off -Site Personnel The Project Supervisor is responsible for implementing the emergency response plan and coordinates emergency response activities on this site. He/she provides specific direction for emergency action based upon information available regarding the incident and response capabilities and initiates emergency procedures. including protection of the public and notification ce appropriate authorities. In the event of an emergency. site personnel are evacuated and do not participate in emergency response activities. As a result, this emergency response plan is designed to comply with 29 CFR 1910.38(a). The on- site personnel and their altemates responsible for coordinating site evacuation efforts are listed in Table 7-4. The site relies upon the off-site emergency response organizations listed in the Emergency Contest Information, Table 7-4, to respond to site emergencies. 7.5 Emergency Alerting and Evacuation Site workers are alerted to emergencies through the use of an employee alarm system. The employee alarrn systems at this site are listed in Table 7-5. Table 7-5 Employee Alarm Systems Type of Alarm Location How Alarm is Used Air horn SSO Three blasts This alarm system is tested periodically under normal site operating conditions to ensure that it is in good working order and can effectively alert all persons on-site. If evacuation notice is given, site workers leave the worksite by way of the nearest exit, Appropriate primary and alternate evacuation routes and assembly areas have been identified. The routes and assembly area will be determined by conditions at the time of the evacuation based on wind direction, the location of the hazard source. and other factors as determined by rehearsals and inputs from emergency response organizations. Wind direction indicators are located so that workers can determine a safe up wind or cross wind evacuation route and assembly area it not informed by the emergency response coordinator at the time the evacuation alarm sounds. Personnel exiting the site gather at a designated assembly point. To determine that everyone has successfully exited the site, personnel will be accounted for at the assembly site. If any worker cannot be accounted for, notification is given to the Project Supervisor so that appropriate action can be initiated. Contractors and subcontractors on this site have coordinated their emergency response plans to ensure that these plans are compatible and that source(s) of potential emergencies are recognized, alarm systems are clearly understood, and evacuation routes are accessible to all personnel relying upon them. 23 7.6 Emergency Response When the lead person on site determines that outside assistance in required. the applicable offsite organization shown in Table 7-4 is contacted. They provides relevant information to the responding organizations. including hazards associated with the emergency incident. potential containment problems, and missing site personnel. 7.7 Emergency Medical Treatment and First Aid This site does not assign site personnel to provide first aid. Personnel who require medical care are transferred to a medical facility. Some personnel on site will be trained in basic first aid and will render care to the best of their abilities under the "Good Samaritan' laws. 7.8 Emergency Response Training All persons who enter this worksite, including visitors, receive a site-specific briefing about anticipated emergency situations and the emergency procedures. Prior to the commencement of work and in accordance with the Training Section of this Plan, site personnel are trained in the contents of this emergency response plan, including potential emergencies. personnel roles and responsibilities, evacuation routes and procedures, and the location of medical assistance. Where this site reties on off-site organizations for emergency response (see Table 7-3), the training of personnel in those off-site organizations has been evaluated and in deemed adequate for response to this site. 7.9 Emergency Response Fire Management We will minimize the risk of accidental fire by utilizing the following mitigation measures as applicable for the site. • StrictIy adhere to Hot Wolk Procedures and protocols • Control noxious weeds and cheatgrass Inspect and maintain equipment to minimize potential ignition sources Use spark arrestors on engines where applicable • Carry incipient Stage fire fighting equipment (up to 20tr ABC extinguisher) in vehicles and they (30ff ABC extinguishers) will be staged on all pad locations • Individuals will be trained in Inapient stage tire fighting techniques and will respond according to their training to suppress any accidental fires • Will create defensible spaces in line with the Colorado Firewise Guidelines and in line with BLM Fire Management Guidelines 24 Figure 7.3 Primary Muster Point: Hiner Gate (N39 Deg 32,474 W 108 Deg 19.518 Elevation 5839) Alternate Muster Point: Cowboy Chapel (N39 Deg 29.115 ft, W 108 Deg 19.705 ft Elevation 5506) Field Rally Point: Main Deer Camp approx. 2.1 miles north of Hiner gale on right hand side o1 road at log cabin. (N39 Deg 34.311 ft. W 108 Deg 20.776 ft Elevation 5985) Note: See attached map. • 25 Table 7-4 Emergency Contact Information The list of telephone numbers below are the emergency contact numbers for this sile. These emergency numbers are verified to be accurate. working numbers. Site personnel are trained and rehearsed in site- specific ernergenty calking procedures. Skinner Ridge Emergency Contact Numbers CHEVRON PERSONNEL CHEVRON MCBU Management Now 131k (XI= r,c11 Olba Ntzoko (wraps• ISarlminar, C heratiurn Srgrnaax 3t17.7833613 3117-71N1-7217 Dave I Itreard F'arilnv R -prru•manr _ 9714253-1011 41714.986-9823 2:3 I-31.47424;7 Faitll)ianr Chrrrabrr 970.2r54-1(41 .1711.37!11i#ilH 2'i.1 -3a7-19111 Chris Bear Faaifilir•.s Fiaeurrrinn 283-. 61449I14 832-41 I-1193 Sian Norris I.in11,6n lrnl:d .Sre iali:! .1)711.2.574RN11 !17(1.2711-7.-1l7 Craig I»'s.,- Rand ,.\I.vlap, 281, 61'1187 2141.11491.7251 2.5.1-2.111.5817 CIoarlir F;4441er LIES ('li.mihsnu 970-2.57-600/i 9711-77$d19H!l CHEVRON MCBU Management Now 131k (XI= r,c11 Olba Ntzoko &.m U:nis \1C8I Fin. Pnxnlrul 281,1131-3713 a121,01.9 Pill Nril I lemy 'Nolen \laist.e'r 2a1.11I1.t7111 713472141 416 281463-11112 hums Michael 1)e1h•rry f )lx•ratinus M:uml,•rr 8:12-854-6.599 307-6711-411.511 281-b11-9713 holm.. jam urrlkart 1115 ManNer 2HI,761-4741 711d911t-14,14 Jinn Barman (,•oral Mlerrauer L424047-71111 L'I•L`11lIi-!4121 Mark I lurtrxr I miet, Cnnntinaror 281, 61'1187 2141.11491.7251 _ Nin lviola4 x27 Earililin•Ilam iurarl 2141-3141-31109 71311112-27!17 Burr I.areuia.s I.rV. Ctxna,.•1 2141-561 -37311 2141--797.27114 281,31-2.5;113 Nary.: MCBU HES Support Staff Nemg Ofiict Csll Str Num) C'ruri, 11,d1,, In.'s Ch:n,rpxrn land a>.i • -11 ,5,i 71-39l417ri!l _1 uld% 1 i4 1141,11 Sr. Salem Ste -c dig 2141,;(i1 -114. -it 713-1426-1801 SIISic 1. k., Sr.SaIr•ry SiltVidur 2141-36 i-3142:3 281-8111*199 i>arr V,,,,,nl Sr. S.ihly SSr:aalnt 281.3111:3797 71:3.8:11-91231 1Josd 11..irudsor Cooing -tor l.afrrc Sixri.dixi 9711-2.171i1N13 117111iU4311Ci Ilnar ISrvurr I Finrnxurn•nlal 1..ad 251-.161-3689 7I3 -2l1-)27.1 _ llrrrurrCava.. Wsi,r& W nor Sprialisr 251-161.:11i4 1 713-3914-27311!14; Sura Sir rIal Air Slxwinlisi 251-561-115,0 251.4,;31.1.9272 konJxekrel Regulatnry•/l'enniuine 151.3131-t1f41 'SSI-tai-lli)ifi t kenr Qrtirui. 1Hi1/17i\1 C'rmrcliararnr 132-1liki-11411sriU4 1:12-2335-7071 7.0 ENVIRONMENTAL PLAN 26 The environmental pian is to comply fully with the requirements set forth in the Oil Shale Research. Development, and Demonstration Lease COG 69165, including but not limited to CDPHE APCD construction emission permits. CDPHE WQCC permit requirements. EPA NPDES SW regulations, Region 8 EPA Guidelines, and BLM Gold Book guidelines. Chevron is utilizing the ESHIA Process for all planning with this Project. Contact the ESHIA Coordinator (Sean Norris) for any further information about what this entails. Other Applicable Documents and References: • Located in Filenet Document Management System http:llevaid mweb01 /idmws1home.asp Piceance 1 HES / Safety / Plans, Programs, Procedures, Processes 1 Programs and Procedures o Respiratory Protection Program o Confined Space Entry Program o Hot Work Permitting Program a Lockout / Tagout Procedure o Hearing Conservation Guidelines o Excavation and Trenching Guidelines • Applicable Web Sites http:l www_co.bim.gov/flrelindex_htm a http://www.southvvestcoloradofires.ortt/defaultasp o httpolwww.rockymountainwildlandfire.infof o http/lwww.oshamovllndex.html o http:!lwww.cotrip.orq! o http:llwets.ansi.orgl o http:lltechstds.ric100.chevrontexaco.net/Tech standards/Special t/SIdfTOCfwrd.pdf o http:llwww.axiomllc.coml • http://oil-oas.state.co.usi o http:llwww.uncc2.org1 27 Chevron Production Co. Fire Prevention and MCA I3usiness Unit Protection Guidelines Piceance Basin Safety Plan, Hot Work Permitting Procedures May 2007 SCOPE The scope of these guidelines is to outline some basic principles to avoid the potentials of having an unplanned and out of control fire, while setting some protection mechanisms in place in case it occurs REQUIREMENTS Chevron requirements are set forth to do all in our powers to avoid the potentials of starting an unplanned fire and all individuals will be trained to know what to do and when to do it if the occasion occurs. APPLICABLE DOCUMENTS Safety Plan, Hot Work Permitting Procedures MATERIALS & EQUIPMENT Permits, Fire Extinguishers, Water sources SAFETY Individuals will be trained to allowable response levels, and all care will be taken to avoid a human caused event. Personnel will be given these guidelines to aid them in occasions of nature caused events also. QUALITY These Guidelines will be reviewed periodically and will be shared with employees. During Level III and other audits we will question field workers to insure they have adequate knowledge to protect themselves in an emergency situation. Task 1.0 Fire Prevention Sub Task 1.1 The field production and processing units will be designed to minimize the potential for starting fires. This includes but isn't limited to; • Flare Stacks • Fired Vessels • Heater Packages • Incinerators 1.2 All work that has potential to cause an ignition source to a combustible material will be covered and planned for using a JSA and Hot Work Permit following the local protocols. • JSA should include weather conditions, and fire potential. BLM Website has this updated daily. • Contact local response personnel and notify them a head of time when doing certain actions that raise the hazards. • Emergency Response Plan will be discussed during JSA meetings • Insure all information is included ()lithe JSA and shared with all personnel affected by the job. CAUTION: Use Hot Work Permit Procedure whenever Hot Work is planned. Important parts of HW Permitting Procedure to comply with for fire prevention • Fire Watch with no other duties when there are any open flames Prinled 4/22/2008 9:31:23 AM Page 1 Chevron Production Co. Fire Prevention and MCA Business Unit Protection Guidelines Piceance Basin May 2007 • Fire Watch observes site for 30 minutes after Hot Work ends or when released by Chevron Representative. • A Chevron Rep will be responsible and oversee all Hot Work Activities. • Avoid Field Hot Work whenever possible — minimize potential • Comply with all requirements on the permit and JSA • Monitor site appropriately to the hazards that could be encountered 2.0 Fire Response 1.3 Area can be mowed on either side of the road down to a minimal level to help mitigate potential ignition sources from vehicles (as determined by Chevron Representative). This area won't be completely void of vegetation due to storm water damage potentials, but will be kept at a reasonable low level. 1.4 Fire Breaks will be mowed into the local landscape to help eliminate fire spread potentials. These areas won't be devoid of vegetation, but will have it kept at minimal levels to avoid fire potentials and addressing storm runoff problems. 1.5 Where applicable we will try to replace the cheat grass, purple mustard, sagebrush, and scrub brush with plants that are less conducive to wildfire spread. 1.6 Vehicle traffic will be restricted to maintained roads only (unless the person has written approval from Chevron Management). This reduces the potential of a fire being started by the catalytic converter. 1.7 Smoking will be restricted to certain locations in our field that are appropriately set up for disposal of the cigarette wastes. No smoking in vehicles or out in the open because of the wildfire potentials. 1.8 Areas around Flare Stacks and Fire vessels will be maintained as bare ground and treated to avoid fire potentials. In some cases other actions will be required to eliminate storm runoff and erosion potentials. 1.9 Work with the BLM and if they see an opportunity to do a prescribed burn to eliminate some fire dangers work with them to make sure it's done safely and with minimal effect on our actions. 2.1 Chevron Employees will be trained to fight Incipient Stage Fires only. • A fire that can be controlled with in 3 minutes or less with use of a small water hose, shovels, polaski, or fire extinguisher. 2.2 Fire Extinguisher will be strategically located at the well sites, in process areas, or in the personnel's vehicles for response capabilities. 2.3 Actions • Make sure you are in a safe location • Notify others of problem and get help coming • Fight fire if you determine it is in incipient stage Printed 4/22/2008 9:31:23 AM Page 2 Chevron Production Co. Fire Prevention and MCA Business Unit Protection Guidelines Piceance Basin May 2007 3.0 Shelter In Place • Protect others • Proceed to a safe location if you can't control and let others know. 2.4 If the personnel aren't adequately trained or can not handle the situation the plan is to proceed to a safe location and notify others of their location. CAUTION: Do NOT try to outrun a fire if you're in a safe zone. 2.5 Provide a water source for fire fighting responders. This can include but not limited to; • Fresh Water Pond • Dip pits along Clear and Willow Creek • Water Tanks — with no Oil 3.1 If the fire is larger than you can safely respond go to a safe location and wait for assistance. Designated Safe Zones • Well pads away from tanks, pits (unless water — no oil), and heater packages. • Irrigated Fields • Process areas away from Hydrocarbon vessels • Roads as a last resort if you can't make it to a larger open area 3.2 Areas to avoid • Cheat grass, purple mustard, dead/dry foliage areas — fast burning fire area • In creek bed close to trees or shrubs — chance of things (trees) failing on you and superheated air flows. • Close to any plastic lines, gas/oil storage, or high pressure lines/equipment • Talus slopes — heat and vapors go up slopes and are death traps • Trailers or wood structures Printed 4/22/2008 9:31:23 AM Page 3 From: Jake Mall To: Cuffin, Sally; CC: Subject: RE: Service Pad / Booster Compressor Station 25-4 Date: Monday, April 21, 2008 10:48:15 AM Attachments: Sally: This e-mail is to inform all parties that Chevron is exempt from the driveway access permit as the access is on private property beyond the Garfield County road system. Jake B. Mall Administrative Foreman Garfield County Road and Bridge Department 970-625-8601 Office 970-618-6194 Cell From: Cuffin, Sally [mailto:Sally.Cuffin@wgint.com] Sent: Monday, April 21, 2008 10:28 AM To: Jake Mall Subject: Service Pad / Booster Compressor Station 25-4 Jake, Sending this your way to confirm we don't need a driveway permit for this location. Thanks! Sally —� pjppDgB PRODUCTION PAO PAD SIZE: 150' R 203' l EIT6446• ` 1.5:11 OUT/FILL Ll S>_OPE4 ` 1 t PROPOSED PRODUCTION EQUIPMENT AREA & PAD EXPANSION AT THE SR #598-25-4 PAD SECTION 25, TMS, R98W, 6TH PM NORM 1/4 CORNER SECTIONS 25/24 T5s,R96N 1924 MO BRASS CAP UIN19 OF PAC DISTURB P.0.1 N244941/2 937.44 PROPOSED ACCESS NE1/4 NW 1/4 SECTION 26 / SE1/4 NW 1/4 SEGTON 25 CHEVRON U.S.A. INC. PROPERTY LEGAL DESCRIPTION: A PARCEL OF LAND SITUATE IN THE NE1/4NW1/4 AND SE1/4NW1/4 OF SECTION 25, TOWNSHIP 5 SOUTH, RANGE 98 WEST OF THE 6TH PRINCIPAL MERIDIAN, COUNTY OF GARFIELD, STATE OF COLORADO, THE PERIMETER BEING MORE PARTICULARLY DESCRIBED FOR AREA AS FOLLOWS: COMMENCING AT A FOUND 1924 GLO BRASS CAP IN PLACE FOR THE NORTH 1/4 CORNER COMMON WITH SECTIONS 25 & 24; WHENCE A 1923 OW BRASS CAP IN PLACE FOR THE SECTION CORNER COMMON WITH SECTIONS 24,25,19 AND 30 BEARS S89'54'57'E A DISTANCE OF 2631.66 FEET, WITH ALL BEARINGS CONTAINED HEREIN BEING RELATIVE THERETO, THENCE S24'48'1O'W A DISTANCE OF 937.44 FEET TO THE TRUE POINT OF BEGINNING OF THE PARCEL DESCRIBED HEREIN; THENCE 55211'05'E A DISTANCE OF 364.85 FEET; THENCE S34 -51'56'W A DISTANCE OF 313.89 FEET TO THE CENTERUNE OF AN EXISTING DIRT ROAD; THENCE S6912'32'W A DISTANCE OF 265.86 FEET TO THE CENTERLINE OF AN EXISTING DIRT ROAD: THENCE N5114'51"W A DISTANCE OF 223.17 FEET TO THE CENTERLINE OF AN EXISTING DIRT ROAD: THENCE ALONG THE CENTERLINE OF SAID DIRT ROAD N05'31'27'W A DISTANCE OF 20&78 FEET; THENCE LEAVING CENTERUNE OF SAID DIRT ROAD N5517'14E' A DISTANCE OF 398.47 FEET TO THE POINT OF BEOININC, CONTAINING 4.97 ACRES MORE OR LESS. NOTES: 1) THE PROPOSED SITE AS SHOWN AND DESCRIBED ABOVE IS NOT A BOUNDARY SURVEY AND NO MONUMENTS WERE SET, THE PURPOSE OF THE ABOVE LEGAL DESCRIPTION WAS TO DESCRIBE THE PERIMETER AND AREA MINN CHEVRON PROPERTY FOR THE PROPOSED PRODUCTION EQUIPMENT AREA ANO PAO EXPANSION AT THE SKR 598-25--4 PAO 2) THE PROP D PRODUCTION PAD SITE PLAN PREPARE() BY CSI. SURVEYOR'S CERTIFICATE I, George R. Bauer: a Professional Land Surveyor in the State of Colorado do hereby certify that thig..Survey was mode under my direct supervision, and th�3 i§a5 t�;Ptag represents said Survey. co en a tee GRAPHIC SCALE IN FEET 1 • - •• rm COLORADO P.L.S. aAK . ARED FOR: CONSTRUCTION SURvEYS, INC`."" E`RON U.S.A. ING. 0012 SUNRISE 19LvD_ DATE:12-03--07 SILT, CO 81652 (1�)16-51 '3 DRAWN BY: BM/IM SCALE: 1"=100' 1 DWGICIfYRON/SR598-25-4 PROD. SHEET: 1 OF 1 r Ya e ' TY 2141-0240.03 re e —T--.' red q •n,•t ✓' 21602440.001 .L e 0 14 i t1 rA SERVICE PAOIBOOSTER COMPRESSOR STATION 25.4 Chevron USA Int. Portion of Parcel Number 2137-153-000.09 34'3519.40" N latitude 100.2015.98" W longitude 34 31 ned tin 42840408 u 14 1121-1514)94009 Garfield County, Colorado Office JtfieAssessor top erfi Street, Suite icy, Glenrrocd Sponge, CO slant 0.0499'0 Yuw,ga feld.renmgsan Legend j Tax Exempt BLM US Forest SudOe Subdivision Tae District Boundary a/`/ Stater Federal Highway Interstate 7e /\/ County Road Private Road, Trail Other Boundaries BLM GCOB Coordinates BASE MAP SOU It00: ,Gary earl wmalin. OPS b.ta 0..0.M C..my iT O`T'rasse4..... t..iudt04a1. M J a.abr Genf NC..rtry lTG.i•^wm !'SGS r -r tBsultydt y@ ter 4401, JT.a hra"nr.•d•'ews GlS dams talon t.v.nm.a yan.n.. FASCIA. MAP5000CCi • Gerfie1d CO., ••••••••••14,0&•1 *al My Sony, AysCAO wa.i• .. tlysm e.ruir.nnd dry reply A drasyy. dlyhyd^'r.nl .l.,ny, .1.116. turn'tram d,p M CAO du+rnp t Boy 44'4.41 14'4 . r.rtil,rd aarrm. o .W to dgrr.a4by Me IT ppxma. horn drr Lr,l J.ntImys bymarts of weedrne.P '"'?- 144,1.190. n1n Township Locator Map 2139 Township g South Range 98 West O Projection:. UTM Pune to NAOa7 Lim emu inch equals I.T0o icer url,noo Pal A,001590.0 mil weave« Se Garfield County if 0.aelryst CM itrAiwo It twat •A, NS II, .14 1 AaaraaorParulM1Mea,2119 P44.mn 1 47-2000 19 BLM Parcel No. 1913.292.00.952 021 29 21 70 Exxon Mobil Corporation Parcel No. 1913.323-00.006 n EV Ranch LLLP -._ Parcel No. 1913.284.00.004 28 27 76 Exxon Mobil Corp.,(3.B%); Levy Brothers LLC (10.8%); JoAnne U. H smas Trust (1.05%); Connie Hinman Trust (0.98%); Virginia Hinman -Trust (0.098%); Stuart A. Umpley Trust (1.05%); Cara V. Lovett & Comerlca Bank - Texas Co. - Tgtlstees of the Susan G. Umpleby Peasner Royalty Trust (0.7%); Stanley Lockett & Comerica Bank - Texas Co. - Trustees of the Cara Virginia Umpleby Lockett Royalty Trust Parce( No1913.351-00.002 f ✓l ✓" S n V f0 J 111_ .• Garfield .• County, ' Colorado:''.' �_-. Office .Assessor 10981h Street, Suite 107. Glenwood Sp rings, CO 61601 970.9459t(i enaw,garfiddcunty.mu! Legend I,l.. Tax Exempt BLM US Forest Service Subdivision ^. Slate. Fede.a111ghway #0v Interstate 70 /v County Road • Private Road, Trail Meander-, Govt Lot-, Former Lot Lines Tax District Boundary BLM GCDB Survey Coordlnales BABE 114.50 RCE I. Contl Rawl 4A.Mw 0P61... Geemtl 49myl,' 0.011.04.1 Mi. ,...e1 44061 3463619 0.1,1704.41011 71.mi b 0nrImA Lamy I, Ow.I..,l 1691 34774.10 0w..mn. d 7,,..man... MT., e.e..n.n., 9.! de., 1140,1 PARCEL IMPSCUCE I ,.4.1!4.+.1.,,.. e.a� semi. C.C. I4 mop I 0l .,.r.�e.wOM enM•I.. awl,a.a.1w.,1Imo. 97n07.11... 0owow NM. 44,. Lx 3l,w.,,w ..9m.111a 1(171rt, 0 11515 slim.. 0.1.,1.119y.,.I 7 0...m.,, rrom e... I.. 404I9I.1 Or mons 14.74...9.:.^?! p19.aMIX +n i Ham. m q 1941 i Or e•q,.ro.1 M.A...1..aG 1.174.7.42 Der,. r AC�n a 11 ev 4 .Wma�YA 61....15 .'.pl .n Township Locator Map .�i El ®_ c!b ;,;iMA B3 E®: ClimlligattEM 1913 Township 4 South Rcnrge 97 W est Romano. UTM Zone 13 NAD27 0 500 I00) 7000 1000 4000 root1 Inch equals 1,500 reel 1.18,000 ...G v m.9 u v 1 M . Garfield County I'rl swsla•P.laPMow191] Rowan 5. 3-24-2006 ,.ym5 Col Chevy Parcel / BLM Parcel No. 1911-301-00-955 11;0.551.00.01., Gan'leld 18 Harris Doyle Livestock LLC (37.95%); Amerada Hess Corp (37.05%); Oil Shale Corp (25%) Parcel No.1911.272-00- 05 oco Inc. (30%) Irl USA Inc. (70%) 0.2139-051-00-012 „7 23 14 BLM Parcel No. 1911-341-00-952 Garfield County, Colorado 3 ' I ALI L'''. '_ Office ...Assessor -es ae 0.21 5.4 237 Olen93300 2,09039, CO876� 970 9459731 99.9/ garlield-aunly col Legend Wier Tax Exempt BIM US Forest Service Subdivision I/ State, Federal Highway ",/ Interstate 70 4#%0" County Road - • Private Road, Trail Meander-. 60091 09-. Former Lot Ernes Tax District Boundary BLM GCBS Survey Coordinates akvwx.SCHRCE I Coro Ilnai carb.m.SPS 4474 0.9.14 Canty IT teprlin..,2002 2 US, 71 oubPnblb 41. dqt iv! by 4411,141 Corry It 13 ow tmra 1%94 1 colowlb 0490rw, al 1,/n105l.11,on 7 go. ortmmls 0111cIMB. M., F•FCILIJAPSWICE Garr.d....yAssasribtbiwobilliptehbk. ku[CAD 74 rt... .w.artini la wit ciatmera rat ma rocas 3 fdlcmrtn, acmiais el mune. by .4bubbo, ili milblaiinni ...1 tbbmplaPwl......11.0..pbb C.0 Ornonet ...[..1.1beby •col...1 opf•re a Md. MI *VI. by '41 r 0.1.14.1.1.1 tg. tn. aid tlybo,,bvsn by .ors ol ma eniba evz...1, 293_999313 7,7:-.."5.7.‘r."V".11:?=.T.":::::::::!::' ,....... •••••••"••• -la,. •••••••, ,......F. ••••••..• 4. ..• .• b.,.,........•••••..•••^.. .........• SP... S.,....1, R..* - - :.";.41r: j:. . : 7711 *1?....r"! :.' ./.". 7.•7! f7.47:147..1:: VIN...1...11...1.11.114141,1a....rooss.........e. 6.1,...... •!.... a .. ... Township Locator Map ... ''' '.1L.4111Yil;41111/141110 1'1.2 . " ' " 12:61:5:411ECERMINF 1 111 il i. COLIMCIDE2MMIDITO '1191t*NORRIFIOV 1 "' '7'''" ' 1911 Township 4 South Range 98 West (3111 PrOlediO1 • LITM Zone 13 NAD27 0 500 I 003 2000 1.409 4.000 Feat 1 9119 994191,500 1991 1.18,000 9,.4A50l0.77 4.1.11 peddi.44.11 0, t '0Garileld Counly 3 01,1,1,1 6...... 4•..... CC111461 +4 541.11,1115 rtalhlaps,tgr 1 4e55401 124-2009 20 23 Slate Parcel No. 2? LOV Land Cq.• Parcel No. 1909-223-00-002 f Colorado 909-232-00-005 State of Colorado Mobil 011 (50%) Pickett'Land Co (40%) Equity Oil (10%) Parcel No. 1909.243-00-00324 • Paul M. Par 10 Marriott, Kathryn Dougan el No. 1909-273-00-007 29 7e n Conoco Inc. (30%) 26 Chevron USA Inc. (701% Parcel No. 2139-051-00-012 BLM Parcel No. 1909.322-00-951 33 7139.051fiP•017 /1 /1 f r: f ✓p 4 / Y d/ /4 ✓4 ✓e ✓ ✓` r ✓ ✓4 Y if / f 1/ /4 ✓4 ✓e 4/f ✓4 Garfield County, Colorado Office.Assessor 109.803 Sleeer. Sate 207, Glenwood Spins, CO 6160 9i0.94S?ll www.gerflddmnly.4fl1 Legend I Tax Exempt BLM US Forest Service Subdivision 'NI Stats, Federal Highway eve Interstate 70 /V County Road Private Road. Trail Meander-, Govt. Lot-. Fortner Lol Lines Tax Deslnd Boundary BLM GCDB Survey Coordinales 4400 444130000 I. Carry Rad 4•1en•• GPI de[4 016.4 count I r 044.4,-. 12402. rv024061 045093.SOL...414 ea 14•••4 02 043..4 0a+10.7 Oallmnl MA i 0414,, We Owls mnl d IL ran ncHe.on nip. N' snlolmre 014 dam. 100041 w,c0u411•S0IWI Ger.1 Corry4.e04e0424P.ar Wp 10nor 44/00004 me. la Ora 44.44..4. Ito 4.• 140414 aminw0141•4 wIna •41..,3•. nwwt..erl4mw, 6.amt was eyl Ib*no.5 000 *mon. •00•.:0•4•00•.:0•4ew rrd b4 11tl .v4nm, a ail ee 141444 by5MII f O••••m nl Iron 1••••• am•n•.r 414•••••00 ma14m44174441, 19.3-4•440texxtt a ry.. n a....4a, n mr...-..e,n•4.r. crw A.,•:-..=.1,11.6,..1:11.641.+,41.11.1... . 4..r.,' ..:Irk .1 A+.•. -.«pa.• w.r.p.. re4...•.....4.4.444 Township Locator Map 14 tat .6 tat illy 1909 Township 4 South Rome 99 W est 0 Projeclron UTM Zone 13 NA027 500 IOW 2 010 0000 4.000 Feel 1 Inch equals 1,5000961 1 19,003 as aodrcpe H Garfield County pp,mm•.m .1.111.101100. I.Yp CC 4rNl •44.13,4•4•0r 324.2006 BLM Parcel No. 2135-064.00-952 ✓a Reuben Geia[d & Stephanie.R- Oldland Parcel No. 2135.073.85-003 BLM Fiarcel N. 2135-184-00-956 Chevron USA Inc. • Parcel No. 2135-291-00-008 fr14 21 d r0 11 f f 1 Encana Oil & Gas (USA) Inc. Parcel No.`2135-273-00-015 ./.- 28 29 Berry Petroleum Company Parcel No. 2135.321-00.009 20 15 11 27 1 Ii /1 /1 ✓a 23 2E f !1 13 25 215101/40421 2171.10246001 215 n ✓r Garfield County, C olorado ,,1p1 41 I Office 01th6 Assessor 10911111Suers. 5iite 207. Glenwood Springs. CO 61601 970.90595/ xwx girl lddaansyCCP Legend Tax Exempt BLM US Forest Service Subdivision Tax OdsInct Boundary ^' State, Federal Highway "e Interstate 70 "ie County Road Pnvala Road. Trail Meander-. Govt. Lot-. Former Lot Lines BLM GCD8 Survey Coordlnales 945E M*P004.00 E r Canty Med 0.50'n. 025 J.. 10,111d Cnnw Ir O.e.5, r1 , 2012 .s....029X1 55010 Ou0r.nerx i ra' 0.1..C.un!I...sae,a ar.!oh u,00A 00,0ala oramlmnl y, ton woo . r. 0.0.21 ...... au.. PHCELWP=ACE ne 00J00101...2('. wtil .•,..,.401,..•.1404.1 1a ran 1 ra..I.a100130.o...0...1., 1 ,01002 .no al.r.sw_ww 2 .,...ron.wj en, ' s.�04411n02 r et. 0490•p0.® l' nM o4.v I... I, er 1V. ort be mol r ...0-1.01,0, tn. 4 Sro.M o. Oe .n=MO 011.1n11.11......, 9M 0...,...0 4.0 na+-r' -. rye��+el.r�&r Ir tr r•rr•. ire ..'141.1 i -r: Township Locator Map C IMOD .20......311121a11IMalmaguipimmail_14: COM® m®31�� 1I4.®Ii11fiY 2135 Township 5 South Range 96 W est (31 P,njectlon: IRM, Zone 13123027 0 500 1000 7.000 3.0x0 4000 rm 1 Inch equals 1,500 feel 116,000 ‘) Garfield County a211...,.6% ..liwv lr. MI 41.r..e4rr4te CC JIM ..11.)10a109 laaM I ae,,,,,,n,e ze,p,:I I5 gonnanr 417094 Par EV Ranch LLLP.' eI No. 1913-24,412M, BLM Parcel Nggq. 2 2137-071-00.9$1 IA Eva & Timothy Uphoff Parcel No. 2137.012-00.001 /< 1 Chevron USA Inc. Parcel No. 2137-153.00.009 Chevron USA Inc. Parcel No. 2137-223-00-003 Chevron USA Inc. Parcel No. 2137-263-00.004 2.1 Chevron USA Inc. f er Parcel No. 2137413-00.010 Eva & Timothy UphON Parcel No, 2137.01440-011 2t Chevron USA Inc. Parcel No. 2137-321-00-008 Chevron USA Inc. portion of Parcel No. 2137-153-00409 Chevron USA Inc. porlion of Parcel No. 2131-263-00-007 Chevron USA Inc. Parcel No. 2137.253.00-007 in Garfield County, Colorado Office orlhe Assessor 1098th 5lreel Suite 207, Glenwood Springs, CO 61601 970,94591)1 wwvlgafietdcwey:tu. Legend Tax Exempt SLM US Forest Service Subdivision Tax District Boundary /%/ Sale, Federal Highway Alf Interstate 70 "I County Road Private Road, Trail BIM GCOB Survey Coordinates BLM Parcel No. fi 2137.362-00-952 BASE 600 aPP110E [1.16.gPed geenq 600 dna Ern/4.4.44, 4444a44/4/.lat08. 14114.1 M001. CeP.I, Irt 6K+rrre S' 31186.8 t 86.a®nees, em aer•zNp 6M,�9 Y8 S CebrltlP 0.eataeil d t P+ np.q e»Ixltnq Prs dee. IxMI 14P4/4M4.PPePI81CC 1.6.N.d C.,t4 0.nq*'11100,. PIOI M.P Senw. Aa4CN) 14114.4 0.114ICIA0.444a 44.141Z.44../ to ma 1444.141 441,14fn8 e[>m4nla 404.144w ram. A 4P1•e., ei waMlnt PSPFI thMy1n011.11,0 tt, diets CAP 4raern•t4 !It.det MOW,I!S 44..r a eral.edyr.110It P era,.., lrpn 444,4f 41.4/1 by mYnPd .14144101114.141441011144 2q-41 el, Projection: UTM Zone 13 NA627 0 500 1000 2000 3000 4000Gort SInch equals 1,500feet 1:18,000 rm,.2539.wwra dmk., Garfield County 44.41,44 ,IMI a. adeoOFe160A/eDS17121 a,nso r: 4).2000 ,•.Ix t BLM Parcel No. 2139-06200.951 Conoco Inc. 130%) Chevron USA Inc. UM) Parcel No. 2139-064-00-020 Chevron USA Inc. Parcel No. 2139.053-00-013 Chevron USA Inc. Parcel No, 2139.064.00-059 Conoco Inc. (30%) Chevron USA inc. (70%) Parcel No. 2139-074-00-015 Conoco Inc. (30%) Chevron USA Inc. (70%) Parcel No. 2139-162-00017 Chevron USA Inc. Parcel No, 2139-181-00-018 Conoco Inc. (30%) Chevron USA Inc. (70%) Parcel No. 2139-051.00-012 Conoco Inc. (302/e) Chevron USA Inc. (70%) Parcel No. 2139-092-00-021 LI_0 EV Ranch LLLP Parcel No. 2139.101.00-011 111 Chevron USA Inc. Parcel No. 2139.174-00.016 11 30 29 eve, 121 golorado Nature Ranch Parcel No. 2139.342 00.009 32 - do sr6 1 131 Parcel No. 2139-111-00.952 14 r2 Chevron USA Inc. Parcel No. 2139.131-00-005 Ey Ranch LLLP Parcel'No. 2139-183.80-006 re reel NO. 4.00-953 ,. Chevron USA Inc. Parcel No. 2139-163-00-0 4 34 3A Chevron USA Inc. Parcel No. 2137-153-00-009 BIM Severed Minerals, No Parcel Number In Assessor Records Garfield County, Colorado OfficeetLeAssessor 10955 Semi, Suite 203. Glenwood Swings. GO B1601 973.94.`991 www.ger Cltldronly.cm Legend Tax Exempt BLM US Forest Service Subdivision Tax District Boundary "40 Stale. Federal Highway Cve Interstate 10 /\/ County Road Private Road, Trail Olher Boundaries BLM GCEB Coordinates IIAKnnrael%E I Carry 25.1 a,l.M1x Goa den. GaMq Carey n rlebm4n.12a0. . creeGrtiad County 11 r1112211,1•111 12124 � a 0wtltndfes 4e spire W eY On 9 121t M! 24 eoro•tlmnt npPear. ar. pneaime. 312 dn. 12.154. r ntt.9weOPcE 1.1.1.4'2.11y NFF..d10346 Neer w. Sera. ereCAD I. maps ereeGrotto GIS eaoddy .Irma 1450 2 F prows n9aoclalen n 21 this m rip by the A War, Ml 0ebia2orm ennay Yew... er Pon/121r Can der ma.lm0etd7 *arid,* engineerw e11.5b roller 211he it pm.sm nl n40n 116 `e1.1 e4re'.mal by •a•lenl e.nd.nne ap^eve 7•;. wµ e rq 'natl. /10111.111,4 e•>„1 r ra a.-„wrwm.a r, er re re 0 mem..1e1.2•1 Township Locator Map 1 10 el 1 MUMul 11•'I. ''w 2139 Township 5 South Rouge 98 West 0 Projection, UTM Zone 13 NAD27 ..� 5$2 lloo �zm 3]W 11nch equals 1,500 beet 1:16000 e.a /42(2l2 204,E 404".5 . Garfield County eNieM4d lIl!III!Ir 7-2006er' a � 1' 2141-054.00-005 Franklin Dee & Vicky L. Norell Parcel No. 2141-054-00-016 vld G Manter (12.5%); Carolyn L Amer! (12.5%) Parcel No. 2141-092-00-017 onoc• Inc 130%) Chevron r nc. Parcel No. 2139-051-00-012 2147.014-00.001 Oartlefd County J 70 71 • 10 Kerogen oil Company r6 Parcel No. 214 -231.10.006 15 1 n Conoco Inc. (30%) Chevron USA Inc. (70%) Parcel No. 2139.064.00-020 IIf i 21 29 r r.,7• Conoco iru. (30%) Chevron USA Inc. (70%) Parcel No. 2139-074-00-015 013541 4,00-015 14 RSIR: d ] 35 17 Conoco Inc. (30%) Chevron USA Inc. l70%l Parcel No. 2139.192-00-017 13 2139142.00009 Colorado Nature Ranch LP Parcel No. 2139.34240.009 9., • 2150-02400-001 Altenbern & S Ina 314 Int Parcel No: 214i-354.04 -012 2139 317.00 027 f Garfield County, Colorado Office oflhe Assessor 10990. Swat Soo 207. Glenwood Wogs. CO 91601 470.945101 wwwperld6aoauy am Legend Tax Exempt 8LM LIS Forest Service Subdivision Tax District Boundary .01%./ Slate. Federal Highway /1/ Interstate 79 ere County Rsod Private Road. Trail Other Boundaries BLM GCDS Coordinates 6UE.wa30UICE. I 0,,10 Awa ...Am 0 EB 1.0. ®ra 0..0100. wr5wm, 1105. •wi.l7avl Sas t S avtlrny. N .w Lipner nb 0.1.61 County n 0r.1.17a1 Sla tl. O.p.ymrl N irrtrvl.i.a 5p•11y rnl.liw.all..[A Is041- MYtZI IA* 10.0.4C5flp 4.tms or.. a.wl4am 1.r... AJ000 IA.w. DM 61.440.1.1 1 Im9 .•.syL.w.l 0.w• 1 .,.t50Pr I q55. �amm. Cs. CAO 5.4.8.1• 1 1On. Pr..aer enYr by ins 11 erulwrlle.n Ins WO aolm,m PY�mrn. m m•n..lbwwmy. WEIMER 370.. G•••••a E.a•• ,..r•.Au rA• a,••• v er��il n,. E= oho a-wV••wee. . A bra0 v . •r••••-••••• w.r -.rr •. TIO+•.. • xt. •.. e. +•. Ewq+C�n., • s. Ago �• .n -. _r ..•.e'er r.'..r'.:.: r`^^r .A wab. 7!..T2 w• Township Locator Map • • • 2141 Township 5 South Raja 99 West Prgesti0n: UTM Tone 13 NAD27 0 500 1000 2000 3.009 5000 Frl 1 Inch equals 1,500 feel 1,19,000 *140111 5,15 0.000 15 Garfield County 0.16.1.02 ewr„•wares 09111 R.wcn 1' 4.7.2000 Adjoining 2187 R. 97 W. 1 R. 90 A. 'faxing Area No. 10-01182 Adjalning 2125 Adjoining 2137 .....5. OXY USA 1+YTP LP Parcel No. 2169-044-00.003 Tang Area NO. d 49-2101• Tax -fig s1+ a+ ,,-E i Savage Limited Partnership I e Parcel No. 2169-022-00.019 u 11 ra I. MO e Shell Frontier Oil R Gas Inc. Parcel No. 2167.382.00-023 El BL Id 8LM Parcel No. 2169.041-00.951 ® &aaea ..............................n .._.......................,..n m # .s, aa+ 1e 6 ID M SW s, m „+ 1e i 0813 m+ u+ 1r OXY USA Inc. Parcel No. 2169-214-00.026 1e 1e i+ ae 1 i 6 _ - 1e 16F 142 ± i CP i le u le 1e 1,— i n 15 _ .+ se CID le+ le J. 4 Is 1: 1] • 0 m'F u+ la a se 1e 0 . 10 EI 12 - - 7 8 ly CD 11 1g 17 X HN, a],0 • l8 in 5� v le 10 ] ir 22 23 y xE 24 C Z F E 11 ]0 e CD e 30 28 '•9- CIPe• 27 04 25 R eli 20 e , iiii wow, a a s 80 2411-041 00-002 1 ] 3 f 2411-101-00-015 , 0 E 05 0411-013-00-001 E. ] e 28 t 11.99 91.35 Adioinine 2411 Last Yates And Bounds Parcel :lumber Used Ie IVA EVA XISC MUM,' .911119.39 F 2169 Township 6 South Range 97 j -Vest 2139442-00-009 6 19 Net 715 7136-163-00.0 4 Chevron USA Inc. parcel 140. 2167-08140-002 Colorado Nature Ranch Parcel No. 2139.342-00.009 Chevron USA Inc. Parcel No. 2167-081-00.002 7J; r 1 BLM Parcel N0. Ae 2167-044-00.952 (231 Tao 8: Chevron USA Inc. Parcel No. 2167.161-00.007 7,475: Lucas 1. Benninger Parcel No. 2161.014.00-020 Chevron USA Inc. Parcel No. 2137.321.00.008 ElBLM Parcel No. 2167433-00-951 . s ULM Parcel No. 2,.. {6 2167-09440.953 f . Shell Frontier Oil & Gas Parcel No. 2167-362-00-023 • G .< "W45 Thad 53 BLM Severed Minerals No Parcel No. in Assessor Records Chevron USA Inc. Parcel No. 2167-21240-008 Chevron USA Mc. Parcel No. 2167.151-00.022 44 rrrr> vY •tvrr 22 Shell Frorlier Oil & Gas Parcel No. 2,167-362-00-023 ra3a1No. -343.6014 dW zP u a3 17 e 1. jil},M Pa cel No. ,7„2161.32 -00.960 rr, 30 7540 +03 6 Traci 105 BLM Paecel No. 2161-334-00461 2413.04 ' .003 R 0 0. 15 d 55 $ BLM Prime! No. 216T-154-00-955 BLM Parcel No. ' 12161.34140.963 Y 1 Viet 647 21 Shell Frontier Oil & Gas Parcel No. 2767.362-00423 gal Parcel No. 2167 343-00.964 23 71 Rad 114 r1' Opal C- Latham (21.8751) Severed Mineral Parcel 8029.054-07-000 Leslie G. JuanitLetham((6.25%) Severed Mineral Parcel 6029-057V-000 Severed MineralParcel8 29.00-07400 Leave C. 8,luanita L. Davis (6.25%) 12 1.1 24 25 Garfield County, Colorado Assessor's Office 109 91h SveeL Suite 207. Glenwood Sponge, CO 81801 970.960955 www.g 0lldd-oxtt5cer Legend Tax Exempt BLM US Fewest Service SU6devsi0e Tax 0,stict Bouodary Iry Nate, Federal Highway /'i Interstate 70 ilike County Road Private Road. Trail Other aoundanes BLM GCOS Coordinates a...1d4aaa212 coup Road urt.rin R.r.110. P.me COM 17 Paorlm1, l2so2. 14 9t.6I SASE, I 3ew000,0eae.3010.0y 0M993c0240,11' PlanmmM 11d%1 p**,. nM.i.al.Owad.a : c¢lv.1=o.o.ammo s 1lriawrtsim ei 110.1 POKE. 1/18 SLIME 1. 0.0003 c¢,nr p..a.seaomaa Darts wasa'»..uccw d. mal. ro Ile e.9 eaadalasaaarvmar l'a)MA x Fal1Iloan41 adapt merlon nap Grin..wrot 11j111 u¢ ad pa 4,4010 ,4 cn>rv.•ul, m,n.¢�I no* e,rw Lao ar,as.amnl N910.9, 1.774tt,ylr 9.,17177 wI,o,. ,na'411 am �>+ erAlan. el 4:0201.0•a a0an.,r. Township Locator Map 2167 Township 6 South Range 98 Weser 0 Prgeden. UTM Zone 13 NA02? O 500 1.000 400 3.300 300 1 Inch equals 1,500 feet 1.18.000 514I01G62" F'odvr.d w Garfield County lAsse • a>w cw • Sacalsl 001.150e2051 Raawn 1'412004 7169-214-00-026 'RACY 60 1 f/flf.+!/iYJ'fi✓/rri!/%7, 2 6 2,19-2T.-29-026 TRACT 96 TRACT 90 7 TRACT 91 TRACT 99 TRACT 95 TRAGI 69 TRACT 69 r. rn%�rrr r�/i TRACT '9A 8 fi 7 BLM Parcel No. 2411482.00.954 TRACT 103 TRACT 79 Adjo'niT1g 2169 TRACT 672 i 'R0C1 7.1 1 TRACT 77 'RAC' 68 'PACT 9' TRACT 79 9 '4ACT 95 100,7 400057 TRACT '1: TRACT '04 19AC' 95 TRACT '7 'RA:', '07 TRACT 108 677 4036 4 0 10 `RAC.' 72 TRACT 69 TRACT '06 '94: r9 'RACY 85 PACT 62 TRACT 66 2 r 1 r• 9 1 TRACT 59 I I- h413 TRACT 63 A 7:' 17 11 1 12 TRACT 105A Tal r l iiiii/ifiii'":7 T 1 • .405 49rrfls TRACT 1050 0 13 22 23 j. TRACT I'5 TRAC1 113 TRACT 116 r '3971 '•1 TRACT 50 Chevronl}$A nc14T 52 Paicei No7;24A45 410416 IR40T ss f 7047.1 56 76AC1 Tat TRACT 125 29 28 7 BL - arcel No. 2411-342.00-956 3 . L TRAC1 759 @0597 TRACT 121 Frank Fe, Payn Theodore 0 & Sexered Mine Wanda M Fleck & ma J Maydew (25%) arcel No. 8029-041-07.000 507907750 96.117 /5509914 2995-099-70-072 ACjoin"rg 2445 9 9' 34 915 57 T astisive6 // . 25)Friiafrfi/CaCC, 2), 5379 r 5 9 04 2411 Township 7 South Range 97 West Opal C. Latham (21.875%) Severed Mineral Parcel 8020-054-07.000 Pauline E. Murry) Latham (21.875%) Severed Mlneraf Parcel 8025-057.07-000 Leslie C. & Juan5a L. Davis (6.25%) Severed Mineral Parcel 8029-100-07-000 djoinieg 0167 Chevron USA Inc. Parcel No. 2413.041430-002 Mark H. & Maur- Severed Mineral Ted E- Lough {2 Severed Mineral n A. I' Parcel %) Parcel Trustees (25%) o 8029-046-07-000 -0T-000 Vaught Jr. (50% Gil & Gas) aIs Parcel No- 8029.047-07 r, 0 n 2167-212-60.-9E3 BLM Parcel No. 2413-092-00.952 Chevron USA me parcel No. 2413.11 (7 :2) 3-112-00-951 Daum or4Ranches Co. I No. 41 -094-00-004 Cn1m6f'. 200 Kenneth W. Satterfield (2.38'%) Severed Mllen I.(SM) Parcel No. 0029.213-07-000 Dean mutter 17.14%( 5M Parcel No. 8029.214-024100 Darrel Satterfield 17.14%) 5M Parcel No. 8029- 15-07-000 Jean Kart (7.14%I BM Parcel N. 8629316-87.400 !Meta Gales (7.14%) 541 Parcel No. 602941749-000 Rhodos S.Ker ield )7.14764 5M Parcel' No 110 9.218-07.000 Joyce Dyer (7.14%) 0M Parcel No, 8024.219-0 400 0lckle Burke (2.30%1 SM Parcel No. 0029220 7-000 Brenda Eepereen (2.3034)51R Parcel No. 6029- 1-07400 Jean Kart (3.50%) 591 Parcel No. 0029.222.07- 30 Hernia Gate. 13.5810) SM Parcel No. 8029.223 -000 Dean Sutter (3.50%) SM Parcel No 0029-3l4.0 -000 Dane15at1ereekl (3.58%1 SN Parcel No. 2029- 2587-000 Kenneth W. Satterfield 11.14%) 5M Po+cer No. 029420.97.000 90000,. 0.0.41 lel (3.54%) SM Parcel No- BO h -227-07400 Joyce Dyer (3.58%) SM Parcel No. 8025.226-0 400 Vickie Burka (1.19%) SM Parcel No. 0029.229 17400 Brenda Eepereen (1.19%) 514 Parcel No. 0029.'30-07-000 to 3ereraer7 If Norman 1 wX- Severcc4 ol(nerals Parcel No. Norman Severed Minerals Parcel No. V. Fleeces (50%) 8029-036-07-000 V. Flasche (50%) 8029437-07-000 16 ar7 E.C. Raley (35.25% Oil & Gas) Severed Mlner4Ps Parcel No. 8429-086-07-000 BLM Parcel No. 2413.222.00.953 20 c A 59 0 2 ea 22 2 E.C. Role y (43.750%4311 & Gas) Severed Minerals Parcel No, 8025-088-07-000 21 22 io. 51-00-016 Jack Armstrong (4.17%I Severed Miner Harvey Armstrong (B.3 Jaynes Louis Arm strong - Fatal. of (6.3 Olio W. Armstrong (B.3 Judy Armstrong Johnson 14.1 1.184) Parcel No. 8029-00147400 '4) 004 Parcel No 0059-002417400 %) 8M Parcel No. 0034-00347400 %) SM Parcel N0. 0029-00447.000 %)8M Parcel No. 0020-04947-000 County 92 a7700YED 99m LIME= se G Ad1o10 204 2443 Howard, %neid. Floyd Gatyean (2 Otto 0. Armstrong (50%) d Minerals Parcel No. 8029.005-07-000 .03%) Severed Mlnerelea%M) Parcel No. 0022.15407400 Each owns 4.13% Int. Surface 2413.36300-017 Greta Gatyean (2554 SM Pascal No. 8020.15107-402 110004 8. Graham (4.17%) 014 Parcel No. 6029.165147400 2413 Township 7 South Range 98 West O.R. & Marvle V. Hudson Severed Minerals Parcel No. 8029-045-07-000 al- 21 Adjoining 2411 til L- I DPT <1 a Chevron USA Inc. _ Parcel No. 2443.124-00-000: BIM Parcel No. 2445-101-00-951 BLM Parcel No. 2445.07240-952 10 4- B.L.M. 41 31 2 11 1 2 ELE2 5342 2 r Boundary Boundary ec Lon 12 Sects= 13 0,3 B.L )I 1 Boundary 853 BLM Parcol-No. 2445-18240-953 APPROVED GARFIELD COUNTY MESA COUNTY Chevron USA Inc. Parcel No. 2445-172.00-009 COUNTY ASSESSOR 17 15 15 14 13 Township 8 South Range 97 West 2415-271-00-008 31 21 31 2 5 31 4 MEV. 6636 B_L. L Ey Road 200 Adjoining 2413 B.L.M Bounds j �O 7 B -L Y 1 21 Boundary 41 Y 31 BLM Parcel No. 2443-033.00-951 David L. Furr I Parcel No. 2443.123-00-004 rg 1.1 Boundary 1EV E13L.M. t2dfa61'�-1"` sXsxvs 1`L 1EV 5338 % Dr Pork DD3 APPROVED COENTY 15123305 17 18 15 r... .QOD-�wrwvvcw F Road 200 2rvvy...,101017 Chevron USA Inc.` Parcel No,' 2443-124-00-006`- 14 GARFIELD COUNTY 13 MESA COUNTY 2443 Township 8 South Range 98 West CHEVRON PICEANCE BASIN NATURAL GAS DEVELOPMENT PROGRAM ADJACENT PROPERTY AND SEVERED MINERAL OWNERS Township 4 South, Range 97 West Map ID Township, Range Parcel Number Name Address 1913 4S, 97W 1913-284-00-004 EV Ranch LLLP 22593 RBC Road 5, Rifle, CO 81650 1913 45, 97W 1913-292-00-952 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 1913 45, 97W 1913-323-00-006 Exxon Mobil Corp. Attn: Exxon Co. U.S.A., PO Box 53, Houston, TX 77001-0053 1913 4S, 97W 1913-351-00-007 Exxon Mobil Corp. (83.8%), Levy Brothers LLC (10.8%), JoAnne U. Homas Trust (1.05%), Connie Hinman Trust (0.98%), Virginia Hinman Trust (0.098%), Stuart A Umpley Trust (1.05%), Cara V. Lockett & Comerica Bank -Texas Co. Trustees of Susan G. Umpleby Peasner Royalty Trust (0.7%), Stanley Lockett & Comerica Bank -Texas Co. - Trustees of the Cara Virginia Umpleby Lockett Royalty Trust Pd Box 53, Houston, TX 77001-0053 Township 4 South, Range 98 West Map ID Township, Range Parcel Number Name Address 1911 4S, 98W 1911-272-00-005 Harris & Doyle Livestock LLC (37.95%), Amerada Hess Corp (37.05%), Oil Shale Corp. (25%) 990 Sapphire Drive, Castle Rock, CO 80108 pp 1911 4S, 98W 1911-301-00-955 Bureau of Land Management (not listed in Assessor's record) 50629 Highway 6 & 24, Glenwood Springs, CO 81601 1911 4S, 98W 1911-341-00-952 Bureau of Land Management (not listed in Assessor's record) 50629 Highway 6 & 24, Glenwood Springs, CO 81601 Township 4 South, Range 99 West Map ID Township, Range Parcel Number Name Address 1909 45, 99W 1909-223-00-002 LOV Land Co. 439 County Road 26, Rifle, CO 81650-8823 1909 45, 99W 1909-243-00-003 Mobil Oil (50%) Attn: Prop Tax Div, PO Box 53, Houston, TX 77001 1909 4S, 99W 1909-243-00-003 Puckett Land Co. (40%) 5460 Quebec St. Suite 250, Greenwood Village, CO 80111-1917 1909 45, 99W 1909-243-00-003 Equity Oil (10%) PO Box 53, Houston, TX 77001 (10%) 1909 4S, 99W 1909-232-00-005 State of Colorado Division of Wildlife, 6060 Broadway, Denver, CO 80216-1029 1909 4S, 99W 1909-273-00-007 Paul M. Marriott, Kathryn Dougan 215 S State St Ste 1170, Salt Lake City, UT 84111-2334 1909 45, 99W 1909-322-00-951 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 Township 5 South, Range 96 West Map ID Township, Range Parcel Number Name Address 2135 55, 96W 2135-064-00-952 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 1 of 5 CHEVRON PICEANCE BASIN NATURAL GAS DEVELOPMENT PROGRAM ADJACENT PROPERTY AND SEVERED MINERAL OWNERS 2135 5S, 96W 2135-073-00-003 Reuben Gerald & Stephanie Oldland 14667 County Road 5, Rifle, CO 81650-8812, IMPS only 2135 5S, 96W 2135-184-00-956 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2135 5S, 96W 2135-273-00-015 Encana Oil & Gas (USA) Inc. c/o Logan & Firmine, 3615 S. Huron Street, Suite 200, Englewood, CO 80110 2135 5S, 96W 2135-321-00-009 Berry Petroleum Co. 950 17th Street Ste 2400, Denver, CO 80202 Township 5 South, Range 97 West Map ID Township, Range Parcel Number Name Address 2137 5S, 97W 1913-284-00-004 EV Ranch LLLP 22593 RBC Road 5, Rifle, CO 81650 2137 5S, 97W 2137-012-00-001 Eva &Timothy Uphoff (50%), Eva Christine Oldland (50°/9) 17037 County Road 5, Rifle, CO 81650 2137 5S, 97W 2137-014-00-006 Reuben Gerald & Stephanie Oldland 14667 County Road 5, Rifle, CO 81650-8812, IMPS only 2137 5S, 97W 2137-071-00-951 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2137 5S,97W 2137-014-00-011 Eva & Timothy Uphoff 17037 Rio Blanco County Road 5, Rifle, CO 81650 2137 5S,97W 2137-131-00-002 Eva & Timothy Uphoff 17037 Rio Blanco County Road 5, Rifle, CO 81650 Township 5 South, Range 98 West Map ID Township, Range Parcel Number Name Address 2139 5S, 98W 2139-062-00-951 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2139 5S, 98W 2139-101-00-011 EV Ranch LLLP 22593 RBC Road 5, Rifle, CO 81650 2139 5S, 98W 2139-111-00-952 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2139 5S, 98W 2139-183-00-006 EV Ranch LLLP 22593 RBC Road 5, Rifle, CO 81650 2139 5S, 98W 2139-214-00-953 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2139 5S, 98W 2139-342-00-009 Colorado Nature Ranch LP 4901 Wineland Road Ste 650, Orlando, FL 32811 2139 5S, 98W Not listed in Assessors Records Bureau of Land Management - Severed Minerals in Section 36 50629 Highway 6 & 24, Glenwood Springs, CO 81601 Township 5 South, Range 99 West Map ID Township, Range Parcel Number Name Address 2141 5S, 99W 2139-342-00-009 Colorado Nature Ranch LP 4901 Wineland Road Ste 650, Orlando, FL 32811 2141 5S, 99W 2141-054-00-016 Franklin Dee & Vicky L. NordPO Box 1536, Meeker, CO 81641 2141 55, 99W 2141-092-00-017 David G. Manter (12.5%), Carolyn L. Ansari (12.5%) 353 South Oneida Way, Denver, CO 80224-1331 2141 5S, 99W 2141-231-00-006 Kerogen Oil Company Attn: C. R. Davis, PO Box 51, Winnetka, it 60093-0051 2 of 5 CHEVRON PICEANCE BASIN NATURAL GAS DEVELOPMENT PROGRAM ADJACENT PROPERTY AND SEVERED MINERAL OWNERS Township 6 South, Range 97 West Map ID Township, Range Parcel Number Name Address 2169 6S, 97W 2169-022-00-019 Savage Limited Partnership I Attn: John Savage, 5953 County Road 320, Rifle, Co 81650 2169 6S, 97W 2169 6S, 97W 2169-041-00-951 2169-044-00-003 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 OXY USA WTP LP 5 Greenway Plaza Ste 110, Houston, TX 77046-0506 2169 6S, 97W 2169-214-00-026 OXY USA Inc. 5 Greenway Plaza Ste 110, Houston, TX 77046-0506 2169 6S, 97W 2167-382-00-023 Shell Frontier Oil & Gas Inc. c/o Shell Oil Company, PO Box 4854, Houston, TX 77010 Township 6 South, Range 98 West Map ID Township, Range Parcel Number Name Address 2167 6S, 98W 2139-342-00-009 Colorado Nature Ranch LP 4901 Wineland Road Ste 650, Orlando, FL 32811 2167 6S, 98W 2167-014-00-020 Lucas L. Renninger 269 Main Street, Meeker, CO 81641 2167 6S, 98W 2167-033-00-951 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-044-00-952 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-094-00-953 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-154-00-955 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-222-00-956 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-272-00-958 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-321-00-960 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-334-00-961 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-341-00-963 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-342-00-962 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-343-00-964 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2167 6S, 98W 2167-362-00-023 Shell Frontier Oil & Gas c/o Shell Oil Company, Po Box 4854, Houston, Tx 77010 2167 6S, 98W 2413-042-00-003 Erwin P. Knirlberger PO Box 42, De Beque, CO 81630-0042 2413 7S, 98W 8029-054-07-000 Opal C. Latham (21.875%), Severed Minerals PO Box 127, De Beque, CO 81630-0127 2413 75, 98W 8029-057-07-000 Pauline E. (Duffy) Latham (21.87%), Severed Minerals 3249 D3/4 Road, Clifton, CO 81520 2413 7S, 98W 8029-100-07-000 Leslie C. & Juanita L. Davis (6.25%), Severed Minerals 1714 Mineota Dr, Silt, CO 81652 2167 6S, 98W Not listed in Assessor's Records Bureau of Land Management - Severed Minerals in Section 15 50629 Highway 6 & 24, Glenwood Springs, CO 81601 3 of 5 CHEVRON PICEANCE BASIN NATURAL. GAS DEVELOPMENT PROGRAM ADJACENT PROPERTY AND SEVERED MINERAL OWNERS Township 7 South, Range 97 West Map ID Township, Range Parcel Number Name Address 2411 7S, 97W 2411-082-00-011 Savage Limited Partnership Attn: John Savage, 5953 County Road 320, Rifle, Co 81650 2411 7S, 97W 2411-082-00-954 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2411 7S, 97W 2411-342-00-956 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2411 75, 97W 8029-041-07-000 Frank R, Payne, & Wanda M. Heck & Theodore D & Velma J. Maydew (25%) Severed Minerals 6141 East Campo Bello Drive, Scottsdale, AZ 85254 Township 7 South, Range 98 West Map ID Township, Range Parcel Number Name Address 2413 7S, 98W 2413-092-00-952 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2413 7S, 98W 2413-094-00-004 Albertson Ranches Co. Attn: Dale Albertson, PO Box 420, De Beque, CO 81630 2413 7S, 98W 2413-112-00-951 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2413 7S, 98W 2413-222-00-953 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2413 7S, 98W 8029-001-07-000 Jack Armstrong (4.17%), Severed Minerals 3474 Hawthorne Dr W, Carmel, IN 46033-9287 2413 7S, 98W 8029-002-07-000 Harvey Armstrong (8.33%), Severed Minerals 413 Ingersol Ln, Silt, CO 81652-9571 2413 7S, 98W 8029-003-07-000 James Louis Armstrong (estate of) (8.33%), Severed Minerals c/o Mary Armstrong Brown, 472 County Road 3000, Aztec, NM 87410 2413 7S, 98W 8029-004-07-000 Otto W. Armstrong (8.33%), Severed Minerals 3195 F Rd Trailer 20, Grand Junction, CO 81504-4037 2413 7S, 98W 8029-005-07-000 Otto O. Armstrong (50%), Severed Minerals 3195 F Rd Trailer 20, Grand Junction, CO 81504-4037 2413 7S, 98W 8029-036-07-000 8029-037-07-000 Norman W. Flasche (50%), Severed Minerals Norman W. Flasche (50%), Severed Minerals 462 Tusher St, Moab, UT 84532-2820 2413 75, 98W 8029-045-07-000 O.R. & Marvie V. Hudson, Severed Minerals 1316 Avenue F, Gothenburg, NE 69138-1736 2413 7S, 98W 8029-046-07-000 Mark H. & Maureen A. Irwin Trustees of the Irwin Family Trust (25%), Severed Minerals 955 Flagstone Dr, Santa Maria, CA 93455 2413 7S, 98W 8029-047-07-000 George G. Vaught, Jr. (50% oil &gas), Severed Minerals P O Box 13557, Denver, CO 80201 2413 7S, 98W 8029-048-07-000 Judy Armstrong Johnson (4.17%), Severed Minerals 9307 W 117th St, Overland Park, KS 66210-2802 2413 75, 98W 8029-054-07-000 Opal C. Latham (21.875%), Severed Minerals PO Box 127, De Beque, CO 81630-0127 2413 7S, 98W 8029-057-07-000 Pauline E. (Duffy) Latham (21.87%), Severed Minerals 3249 D3/4 Road, Clifton, CO 81520 2413 7S, 98W 8029-059-07-000 Ted E. Lough (25%), Severed Minerals 315 4th St, Glenwood Springs, CO 81601-3036 2413 7S, 98W 8029-086-07-000 8029-088-07-000 E.C. Roley (31.25% oil & gas) , Severed Minerals E.C. Roley (43.75% oil & gas) , Severed Minerals Attn: Stephen E. Roley, P 0 Box 71, Arvada, CO 80001 2413 7S, 98W 8029-100-07-000 Leslie C. & Juanita L. Davis (6.25%), Severed Minerals 1714 Mineota Dr, Silt, CO 81652 2413 7S, 98W 8029-154-07-000 Howard, Floyd, Ronald Galyean; Laura O'Brien, Betty PO Box 667, Lukeville, AZ 85341-0667 4 of 5 CHEVRON PICEANCE BASIN NATURAL GAS DEVELOPMENT PROGRAM ADJACENT PROPERTY AND SEVERED MINERAL OWNERS 5 of 5 Rickstrew (20.83%) severed minerals: each owns 4.13% of surface 2413-362-00-017 (Chevron) 2413 7S, 98W 8029-155-07-000 Greta Galyean (25%), Severed Minerals Jay Rickstrew, 1423 E Spruce Ct, Rifle, CO 81650 2413 7S, 98W 8029-156-07-000 Millard E. Graham (4.17%), Severed Minerals 211 Morrison Avenue, Rangely, CO 81648-2802 2413 75, 98W 8029-213-07-000 8029-226-07-000 Kenneth Satterfield (2.38%), Severed Minerals Kenneth Satterfield (1.19%), Severed Minerals 1253 Whitlock Ridge Dr SW, Marietta, GA 30064-5415 2413 7S, 98W 8029-214-07-000 8029-224-07-000 Dean Sulzer (7.14%), Severed Minerals Dean Sulzer (3.58%), Severed Minerals p0 Box 66, Hillsdale, WY 82060-0066 2413 7S 98W 8029-215-07-000 8029-225-07-000 Darrel Satterfield (714%), Severed Minerals Darrel Satterfield (3.58%), Severed Minerals 651 S Road, Mack, CO 81525 2413 7S, 98W 8029-216-07-000 8029-222-07-000 Jean Hart (7.14%), Severed Minerals Jean Hart (3.58%), Severed Minerals p0 Box 1946, Rolla, MO 65402 2413 7S, 98W 8029-217-07-000 8029-223-07-000 Neola Gates (7.14%), Severed Minerals Neola Gates (3.58%), Severed Minerals 1933 N East Street No 14, Guymon, OK 73942 2413 7S 98W 8029-218-07-000 8029-227-07-000 Rhodora Satterfield (7.14%), Severed Minerals Rhodora Satterfield (3.58%), Severed Minerals 2117 Broadway, Grand Junction, CO 81503 2413 7S, 98W8029-219-07-000 8029-228-07-000 Joyce Dyer (7.14%), Severed Minerals Joyce Dyer (3.58%), Severed Minerals 431 30 1/2 Road, Grand Junction, CO 81504 2413 7S,98W 8029-220-07-000 8029-229-07-000 Vickie Burke (2.38%), Severed Minerals Vickie Burke (1.19%), Severed Minerals PO Box 1319, Gypsum, CO 81637 2413 7S, 98W 8029-221-07-000 8029-230-07-000 Brenda Esparsen (2.38%), Severed Minerals Brenda Esparsen (1.19%), Severed Minerals pp Box 268, Minturn, CO 81645 Township 8 South, Range 97 West Map ID Township, Range Parcel Number Name Address 2445 85, 97W 2445-072-00-952 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2445 8S, 97W 2445-101-00-951 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2445 85, 97W 2445-182-00-953 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 Township 8 South, Range 98 West Map ID Township, Range Parcel Number Name Address 2443 85, 98W 2443-033-00-951 Bureau of Land Management 50629 Highway 6 & 24, Glenwood Springs, CO 81601 2443 85, 98W 2443-123-00-004 David Furr PO Box 186, Debeque, CO 81630 5 of 5 NTY ATTORNEY'S OFFICE 108 8' Street, Suite 219 Glenwood Springs, CO 81601 Tele: (970) 945-9150 Fax: (970) 384-5005 February 8, 2008 James S. Talbot, Sr. Counsel Chevron North America Exploration and Production 11111 5. Wilcrest #N2206 Houston, TX 77099 Via Regular Mail & E -Mail: jtalbot@chevron.com RE: Skinner Ridge 598 -25 -CV and On -Going Land Use Applications for Chevron and CUSA's Surface Tenants Dear Mr. Talbot: I have completed my initial legal review of ownership and noticing documentation for Chevron U.S.A.'s ("Chevron" or "CUSA")Skinner Ridge 598 -25 -CV ("25-CV")temporary housing Special Use Permit application. Chevron, as promised, provided: 1. a map, based on the Garfield County Assessor's Office Tax Parcel Map Series, showing Assessor's Parcel No. 2137-153-00-009 (in which 25 -CV is to be located)and all other contiguous land held in the name of "Chevron USA", constituting one "Y" shaped,54,000+ acre"lot"under Garfield County's Zoning Resolution("Y" or "lot"). The lot is, thus, "the property that is the subject of the hearing" under Colorado's Notification of Surface Development statute, §§24- 65.5-103 and 103.3 (1)(a), C.R.S. , as amended. 2. identification on the map of surface owners within 200 feet of the boundary of the Y, by owner name and Assessor Parcel Number. 3. identification of severed minerals and royalty interests "in" the lot, shown on the map by notation including owner name, per cent share (when applicable) and separate Assessor's Parcel Numbers, if available. If there is no mineral notation, we are assuming Chevron owns the minerals. (I have not located a reference to any lease rights on the map; but, I understand from the information provided at the SOCC hearing on the earlier 598 -25 -- AV application that Williams owns lease rights in Assessor's Parcel No. 2137-153-00-009.) Jamas S. Talbot, Sr. Counsel Chevron USA February 8, 2008 Page 2 4. an Affidavit of Surface Ownership regarding Section 25, T55, R98 w, 6th PM, a portion of 2137-153-00-009, in which 25 CV is to be located.(Thus, we will need the same waiver from Williams, referred to above, or proof that Williams, as a mineral lessee, has been notified of the hearing on the Special Use Permit for 25 -CV.) 5. a 5 -page list of surface owners within 200 feet of the boundary of the "Y" and severed mineral and royalty interest owners in the "Y". The 25 -CV application does not contain back up deeds and/or US Patents for the entire lot. This is consistent with your letter and e-mail, dated November 13 and December 3, 2007 respectively, regarding: (1) title issues, (2) corporate mergers,, (3) the difficulty of providing proof of ownership for the lot, and (4) the relative simplicity of providing proof of ownership for the multiple parcels, within the lot, upon which facilities under land use review are located. 1 understand from your February 4, 2008 "follow-up" e-mail that you are not in a position to provide a sworn Declaration of "good title" to the lot. Can you, instead, formalize that e mail on Chevron letterhead and allow the letter to be a part of the current 25 -CV application and future Garfield County permit application packets filed by Chevron and its surface tenants? As we have discussed, proof of ownership is usually based upon a recorded deed (or deeds), or in some instances a current Title Commitment, showing ownership of the "subject lot", no matter the size, in the applicant land owner. However, based upon the BOCC's factual findings regarding "adequate" proof of ownership and notice in recent hearings, 1 believe that such a letter from you, as Corporate Counsel, along with: (1) the map; (2) list of noticed surface and mineral owners, including Assessor Parcel Numbers; (3) the back-up documents for land, including US Patents for deeded un- patented mining claims, and minerals associated with the "tract" upon which the facility is located; and (3) the associated corporate merger documents, unless specifically referred to in your letter, would in most instances make an adequate ownership and noticing application packet. James S. Talbot, Sr. Counsel Chevron USA February 8, 2008 Page 3 Once completed, and updated in a timely manner by local Chevron representatives to show changes in mineral and surface notations, the packet could be copied for each Chevron application and the applications of Chevron's surface tenants, such as PDC and Marathon. Needless to say, the frequency with which Garfield County's real estate records are checked for changes in ownership and the method by which Chevron disseminates updated information to surface tenants are matters of internal corporate policy. However, as you know, before the hearing is opened the attorney for the BOCC asks the applicant when the County's real estate records were last checked. Title policies more than one year old at the time of hearing have been deemed inadequate to prove up ownership in the applicant land owner. Noticing information, not updated within three (3)months of a hearing, has been deemed inadequate to confer jurisdiction and allow opening of a quasi-judicial hearing before the BOCC. This is a long letter, but 1 also want to respond to the "conflict of laws" issue discussed in your November 13, 2007 letter. I did not mean to infer that CUSA's mergers in Delaware and Pennsylvania were subject to Colorado law, only that CUSA is subject to the Secretary of State's filing requirements for foreign corporations, detailed in the Colorado Corporations and Associations Act (Title 7, Article 90, Part 800) and to the requirements of Colorado's conveyancing statutes in Title 38. Such statutes, as you know, deal with evidence of entity existence and authority to affect title to real property. I referred to §38-30-144 in my letter to EnCana, dated June, 2007 and copied to Chevron in August of 07. Since writing that letter, I have been unable to discern the meaning of the §38-30- 144(3)(h), statutory requirement that foreign corporations record a "Certificate of Authority" in the Clerk and Recorder's records. As it turns out, the Secretary of State does not issue such a certificate. The document showing authority to do business in Colorado, under current law, is the corporation's "application for authority"stamped by the Secretary of State as "filed" / "accepted" by the SOS. I have spoken with local corporate attorneys and title professionals who also find the statutory requirement unintelligible. The practice, despite the language of the statute, seems to be to record a "Statement of Authority" (§38-30-172)if and when needed, and, otherwise, to do what Chevron has done, i.e., file the "foreign" Certificate(s) of Merger to show Chevron as the surviving entity and thus "record" owner of the real estate. James S. Talbot, Sr. Counsel Chevron USA February 8, 2008 Page 4 Thank you for your continued attention to the ownership and noticing issues involved in CUSA's land use applications in Garfield County. Sincerely, Attar cc Julie Justus, Chevron Fred Jarman, Dir., Garfield Co. Building & Planning David Pesnichak, Sr. Planner, Garfield Co. Building & Planning T;\MyFiles\PLAN\CORRES\chevrontalbot2.14pd Chevron 3ames S. Talbot Senior Counsel February 11, 2008 Carolyn M. Dahlgren Deputy County Attorney Garfield County Attorney's Office 108 8th Street, Suite 219 Glenwood Springs, CO 81601 Re: Chevron's Title to the 54,000 acre "Y Lot" Law Department North America Exploration and Production Company 11111 S. Wilcrest #N2006 Houston, Texas 77099-4397 Tel 281-561-3536 Fax 281-561-3515 jtalbot@chevron.com Dear Ms. Dahlgren, Following up on our frequent discussions on the captioned topic and your letter of February 11, 2008 I will attempt in this letter to explain why I am 99% certain that Chevron has good title to the entire Y Lot, but despite that high degree of certainty can't provide you with a sworn statement to that effect. The basis for my belief in Chevron's having good title to the entire Y Lot starts with the Garfield County Assessors Records, which records are based on the Deed Records on file in Garfield County, which show that Chevron is the owner of the entire Y Lot. While I acknowledge that the Assessors Records may not be quite as reliable as the Deed Records they are nevertheless official records and they show that Chevron, or its predecessors have owned the Y lot for many decades and that Chevron has paid taxes on the entire Y Lot over those decades. Backing up the accuracy of those records is the fact that our on site ranch manager, Mr. Craig Tysse, is unaware of any third party claims to the Y lot acreage that put a cloud on our title to any portion of the entire lot. Finally my certainty about our title is based on my personal review of abstracts and title opinions covering portions of the Y lot all of which demonstrate good title to the sections or pieces reviewed. Over the past year I have had the opportunity to do in depth reviews of portions of the Y Lot to determine if their were problems with our title and each time I have done so I have been able to confirm title to the extent that I was able, or would be able, to provide sworn testimony as to Chevron's ownership of the particular portion of the Y Lot which was the subject of my review. While I would like to be able to provide you with a sworn declaration, either my own or outside counsels, stating that Chevron owns the entire Y Lot I cannot do so, despite my 99% certainty that such is the case, because I do not have abstracts (At least not abstracts which are up to date.) or title opinions for large portions of the Y Lot. I have discussed this with Lee Parker, Chevron's lead land Representative for the area, and he has advised me that he estimates it would take up to two years to obtain abstracts for the all the parcels for which we don't have current abstracts and to have those abstracts examined. While I Ms. Carolyn M. Dahlgren February 11, 2008 Page 2 can tell you I am 99% certain of our title based on the information cited herein neither I nor our outside counsel can give a sworn statement that based on a thorough examination we have concluded that Chevron owns title to each and every acre in the entire Y Lot — we can't do so without examining current abstracts, which don't exist for the whole of the Y Lot. Part of the problem in this case stems from the manner by which Chevron acquired title. Chevron, or its predecessors, began acquiring parcels of land in Garfield County at least as early as the 1940's. Over many decades, in over a hundred separate transactions, Chevron and its predecessors, or entities it or they later acquired by merger or acquisition, put together what is shown on the Assessor's records as the Y Lot. We have scores of Deeds granted over many decades going into companies which were acquired by or merged with Chevron or entities which Chevron merged with or acquired. As you are aware I have provided detailed explanations as to how Chevron acquired title to a particular tract which forms part of the whole Y Lot. Each title I have examined records regarding one of these individual tracts I have been able to trace title into Chevron, however these examinations are more in the nature of spot checks on title as I don't have adequate abstracts on many of the individual tracts on which to base a sworn statement. As you are aware I, or outside counsel for Chevron, have been able to explain in great detail and under oath just how Chevron acquired title to each parcel for which we have submitted a permit application. Our applications include Deeds and an explanation of our title to the individual tract on which we are seeking to conduct operations. The tracts typically compose a half section or more on which all the operations for which the permit is sought will be conducted. These sworn statements are made only after conducting a very thorough review of our records including but not limited to abstracts. I do not conduct these reviews lightly and don't assert we have title unless I am very sure that I have looked at the abstracts and understand and can explain just why it is I assert Chevron has good title to the tract. While I can make no such absolute assertion as to the entire Y Lot I can say, based on the Assessor's Records, my discussions with Mr Tysse, the dozen or more title opinions I have examined, the numerous abstracts I have reviewed, and the corporate records I have examined that I am 99% certain that Chevron has good title to the whole of the Y Lot. Chevron's Land Department is working diligently to secure current abstracts and title opinions for the entire Y Lot and when those are in hand, hopefully sometime in 2010, I will be able to provide swore statements as to our good title to the whole of the Y Lot. Until that time I ask that the County rely on the detailed information I am able to provide as to Chevron's title to the tract on which all of the operations covered in the permit will be performed. That detailed information, backed by swore statements as to title on the tract, and the information cited herein including the Garfield County's Assessors Records is good evidence of our title to the whole of the Y Lot and I request you accept it until such time we have completed our title review of the whole of the Y Lot. Sincerely es S Talbot cc: Julie Justus Michael Debeny AFFIDAVIT OF SURFACE OWNERSHIP STATE OF COLORADO ) COUNTY OF MESA ) ss. James M. Colosky, hereinafter referred to as the Affiant, being of lawful age and being duly sworn, upon oath, deposes and states, as follows: 1. The Affiant is James M. Colosky, whose business address is 200 North 6th Street, Grand Junction, Colorado, where Affiant is a member of the law firm of Williams, Turner & Holmes, PC of that address. 2. Affiant has been licensed by the Colorado Supreme Court to practice law within the State of Colorado since April 15, 1971. Since that time, Affiant has regularly examined title to real property, commencing in June of 1971, and title examination has constituted a significant portion of Affiant's legal practice from that time to the present. 3. Affiant has been retained at various times over the past four years by Chevron U.S.A. Inc. to examine the title to various tracts of land located in Garfield County, Colorado, and has rendered title opinions pertaining to such lands, which opinions cover both the surface and mineral estates therein. 4. In the course of that work, Affiant examined the title to the entirety of Section 25, Township 5 South, Range 98 West, 6th P.M., during January of 2005, and again during July of 2007. 5. Such examinations indicated that the chain of title to the surface of all of said Section 25 can be followed through the official Records of Garfield County, Colorado, and is as follows: A. Title to said Section 25 opened under the following five United States Patents: (1) Patent No. 1027865, dated May 25, 1929, recorded October 13, 1948, in Book 239, at Page 107, from the United States of America to The Federal Shale Oil Company, covering the Clear Creek No. 3 Placer Mining Claim, which is described therein as comprising Independent Resurvey Tract 101, Township 5 South, Range 98 West, a portion of which Tract 101 lies within Section 25. -1- (2) Patent No. 1128255, dated February 9, 1950, recorded February 24, 1950, in Book 248, at Page 496, from the United States of America to Federal Oil Shale Company, covering the Coral T. Nos. 1, 2, 8, 9, 26, 27, 28 and 38 Placer Mining Claims. Two of these claims, the Coral T. Nos. 26 and 38, lie within said Section 25, with the Coral T. No. 26 Placer Mining Claim being described therein as comprising the NE/4 of Section 25, and the Coral T. No. 38 Placer Mining Claim being described therein as comprising the NW/4 of Section 25, all in Township 5 South, Range 98 West. (3) Patent No. 1131843, dated May 1, 1951, recorded May 26, 1951, in Book 258, at Page 441, from the United States of America to Federal Oil Shale Company, covering the Velvet No. 13 Placer Mining Claim, which claim is described therein as comprising Lot 3 of Section 26, and Lots 1 and 2 of Section 25, all in Township 5 South, Range 98 West. (4) Patent No. 1129799, dated August 29, 1950, recorded September 13, 1950, as Reception No. 173449, from the United States of America to Federal Oil Shale Company, covering the Coral T. Nos. 31, 32 and 37 Placer Mining Claims. One of those claims, the Coral T. No. 31, lies within Section 25, with said Coral T. No. 31 Placer Mining Claim being described therein as comprising the SE/4 of Section 25, Township 5 South, Range 98 West. (5) Patent No. 1142205, dated December 29, 1953, recorded January 30, 1954, as Reception No. 184835, from the United States of America to Federal Oil Shale Company, covering the CIear Creek No. 2, Clear Creek No. 4 and Velvet Shale No. 20 Placer Mining Claims. The Clear Creek No. 2 Placer Mining Claim is described therein as comprising Lots 2, 7 and 8 of Section 36, the Clear Creek No. 4 Placer Mining Claim is described therein as comprising Lot 6 of Section 36 and Lots 3 and 4 of Section 25, and the Velvet Shale No. 20 Placer Mining Claim is described therein as comprising Lots 4 and 9 of Section 36, all in Township 5 South, Range 98 West. B. Mining Deed, dated December 17, 1946, recorded January 20, 1947, in Book 222, at Page 444, from D.D. Potter, Gertrude I. Potter, R.P. Ralston, H.K. Savage, and Hazel M. Costello, the surviving members of the last Board of Directors of The Federal Shale Oil Company, a defunct corporation, and as trustees for the creditors and shareholders of said company, acting pursuant to an Order previously entered by the District Court at Denver, Colorado, which conveyed all of the right, title and interest of The Federal Shale Oil Company in the Clear Creek No. 3 Placer Mining Claim to Federal Oil Shale Company. -2- C. Warranty Deed, dated December 29, 1948, recorded January 5, 1949, in Book 240, at Page 194, by which Federal Oil Shale Company conveyed all of its right, title and interest in the Clear Creek No. 3 Placer Mining Claim to Pacific Western Oil Corporation. D. Warranty Deed, dated September 8, 1950, recorded September 13, 1950, as Reception No. 173450, by which Federal Oil Shale Company conveyed all of its right, title and interest in the Coral T. No. 31 Placer Mining Claim, and other claims, to Pacific Western Oil Corporation. E. Warranty Deed, dated December 20, 1950, recorded December 20, 1950, in Book 255, at Page 558, by which Federal Oil Shale Company conveyed all of its right, title and interest in the Coral T. Nos. 26 and 38 Placer Mining Claims, and other claims, to Pacific Western Oil Corporation. F. Warranty Deed, dated May 16, 1951, recorded May 26, 1951, in Book 258, at Page 449, by which Federal Oil Shale Company conveyed all of its right, title and interest in the Velvet No. 13 Placer Mining Claim, and another claim, to Pacific Western Oil Corporation. G. Bargain and Sale Deed, dated December 12, 1952, recorded December 16, 1952, in Book 267, at Page 155, by which Federal Oil Shale Company conveyed all of its right, title and interest in the Clear Creek No. 4 Placer Mining Claim, and other claims, to Pacific Western Oil Corporation. H. Certificate of Amendment issued by the Office of the Secretary of State of the State of Delaware on April 26, 1956, recorded May 2, 1956, as Reception No. 193851, concerning the Certificate of Amendment of the Certificate of Incorporation of Pacific Western Oil Corporation by which the Board of Directors of said corporation changed the name of said corporation to Getty Oil Company. I. Assignment, dated January 1, 1984, recorded February 3, 1984, in Book 643, at Page 920, by which Getty Oil Company assigned, with words of grant and conveyance, all of its right, title and interest in said Section 25, together with other lands and mining claims, to Getty Mining Company. J. Confirmatory Assignment, dated March 1, 1985, recorded July 5, 1985, in Book 671, at Page 804, by which Getty Mining Company assigned, with words of grant and conveyance and with warranties of title, all of its right, title and interest in said Section 25, together with other lands and mining claims, to Getty Oil Exploration Company. -3 - K. Warranty Deed, dated effective December 31, 1984, executed January 8, 1988, recorded January 19, 1988, in Book 728, at Page 19, by which Getty Oil Company conveyed all of its remaining right, title and interest in said Section 25, if any, together with other lands and mining claims, to Getty Oil Exploration Company. L. Quitclaim Deed, dated January 1, 1985, recorded May 11, 1988, in Book 734, at Page 107, by which Texaco Producing Inc., which has never owned any record interest in said Section 25, conveyed all of its right, title and interest, if any, in said Section 25, together with other lands and mining claims, to Getty Oil Exploration Company. M. Certificate of the Secretary of the Commonwealth of Pennsylvania, dated July 2, 2002, recorded July 18, 2002, in Book 1370, at Page 408, concerning the Agreement and Plan of Merger, dated as of April 29, 2002, by and among Chevron U.S.A. Inc. and Getty Oil Exploration Company, by which those corporations agreed to a merger, effective on. April 30, 2002, with Chevron U.S.A. Inc. the surviving corporation. 6. Consequently, based upon the title materials reviewed in connection with the above title examination on behalf of Chevron U.S.A. Inc., the Affiant opined that, as of July 26, 2007, the surface of all of Section 25, Township 5 South, Range 98 West, is owned by Chevron U.S.A. Inc. Further, Affiant sayeth naught. M. Colos y Subscribed and sworn to before me this jq V ay of December, 2007, by James M. Colosky, the Affiant. WITNESS my hand and official seal. My Commission expires: KAREN L. ; SMITH j /af0l4,9 -4- Chevron %.1 August 29, 2007 Mr. Fred Jarman, Director Garfield County Building & Planning Department 108 8th Street, Suite 401 Glenwood Springs, CO 81601 James S. Talbot Senior Counsel Re: Authorization to Represent Chevron - Sally Cuffin, Washington Group International Inc. Dear Mr. Bean: Law Department North America Exploration and Production Company 11111 S. Wilcrest #N2006 Houston, Texas 77099-4397 Tel 281-561-3536 Fax 281-561-3515 jtalbot©chevron.com Chevron U.S.A. Inc. (Chevron) has retained the services of Sally Cuffin of the Washington Group International Inc.. Ms. Cuffin will represent Chevron in facility permitting for our Piceance Project in Garfield County, a role in which she will prepare and submit Special Use Permit Applications, ISDS, building, grading, pipeline, road crossing and other routine construction related applications and information on behalf of Chevron. Ms. Cuffin is also authorized to participate in discussions before appointed and elected boards regarding the various applications, however at such meetings, her authority to legally bind Chevron is limited to the terms set forth in the Permit Applications or other written documents filed on our behalf. Sincerely, -74,r-- S. Talbot cc: Nicole Johnson Timothy Barrett Sally Cuffin 10 Ton Gross Vehicle Weight Only (20,000 Pounds) -- OW Loads Under 15' High OS/OW Loads Over 15' High GARFIELD COUNTY MESA COUNTY 0 1 Miles BLM Ref. No. 1105-06 Class III Cultural Resource Inventory Report for Two Proposed Pipeline Route Segments (8.50 miles) in the Clear Creek and Deer Park Areas of Garfield County, Colorado, for ChcvronTexaco GRI Project No. 2533 3 June 2005 Prepared by Carl E. Conner and Barbara J. Davenport Grand River Institute P.O. Box 3543 Grand Junction, Colorado 81502 BLM Antiquities Permit No. C-52775 Submitted to Bureau of Land Management Grand Junction Field Office 2815 I -I Road Grand Junction, Colorado 81506 Abstract Grand River Institute (GRD conducted a Class III cultural resources inventory of two proposed pipeline route segments in the Clear Creek and Deer Park areas of Garfield County, Colorado, for ChevronTexaco. These routes totals approximately 8.50 miles long, of which 6.85 miles are located on private lands and 1.65 miles are on Bureau of Land Management (BLM) administered property. A 200 -foot wide corridor was inspected for the pipeline routes, resulting in a survey of a total of 166 acres of private property and 40 acres of BLM land. The survey and report preparation were conducted by Carl B. Conner, Barbara J. Davenport, Nicole Darnell, Jim Conner and Dana Archuleta. A files search was completed on 19 May 2005, and the field inventory was carried out on May 31" and June 1$' of 2005. The inventory was undertaken to ensure the project's compliance with federal legislation governing the identification and protection of cultural resources. The purposes of this investigation were to identify resources within the project area likely to be affected by the proposed action, to evaluate these sites' eligibility for listing in the National Register of Historic Places (NRNP), and to make management recommendations for those sites found to be eligible or potentially eligible. The files search identified three historic sites within the project corridors. Two sites (5GF424 and 5GF5425) are structures near the mouth of Clear Creek and one site is reportedly an historic race crack (5GF351), all occurring on private property. The Roan Creek Community Center (5GF424), was revisited just last year for another project so a new reevaluation form was not completed for this site. The Roan Creek School House (50F425) was previously field evaluated as eligible for listing on the NRNP. Site 5GF425 was reevaluated as "field not eligible" for listing on the NRHP. Site 5GF351, the historic race track, was previously field evaluated as need data. With this revisit, no indication of the race track was found. Site 5GF351 was reevaluated as "field not eligible" for listing on the NRNP. In conclusion, the two historic structures will not be affected by the proposed pipeline construction. The historic race track site has been previously disturbed by road construction, and farming/ranching activities and there is no subsurface potential. Since the pipeline construction through this site will take place in already disturbed areas (road corridor) archaeology clearance for the project is reconunended. ii Table of Contents Introduction 1 Location of the Project Area 1 Environment 1 Summary of Tiles Search and Literature Overview 2 Study Objectives 4 Field Methods 4 Results 4 Site Significance 5 Site Description 5 Discussion 7 Stimm:uy of Site Evaluations and Recommendations 8 References 9 Appendix A: Tables of Previously Recorded Cultural Resources and Bibliographic List of Previously Conducted inventories A. l Appendix B: OAHP Site Form B.1 List of Figures Figure 1. Project location map (1 of 2) v Figure 2. Project location map (2 of 2) vi Figure A -l. Cultural resources location map A.5 Figure A-2. Cultural resources location map A.6 Table A-1. List of previously recorded cultural resources A.2 Table A-2. Bibliographic list of previously conducted cultural resources inventories ... A.2 iii Mount Blaine (1971) Quadrangle Garfield - Colorado ArcMap GIS DRG U.S.G.S. 7.5' Series (topographic) Scale 1:24000 Contour Interval 40 Feet T. 5 S. and T. 6 S., R. 98 W., 6th P.M. Zone 12 NAD 1983 f gr i I• .8.151 BLM _-Land PA , 16 BLM Land`, I R 57{6 \ ,l •' ,.°, `}•° 4 -i 1 • \` rar.-d ' _`_ , ..r . .-- Y S - .----Figure 1. Project location,map (1 -of -2) for the Class -III cultural -resources -inventory for -two -proposed pipeline route segments in the Clear Creek and Deer Park areas of Garfield County, Colorado for ChevronTexaco. Areas surveyed are highlighted. [GRI Project #2533, BLM No. 1105-06, 6/03105) .,» r, A MotIgt• f3lainu' • j ,• i x ,28 Composite Quadrangle Maps Long Point (1968) and Mount Blaine (1971) Garfield - Colorado U.S.G.S. 7.5' Series (topographic) Scale 1:24000 Contour Interval 40 Feet T. 6 S., R. 98 W., 6th P.M. Zone 12 NAD 1983 .4 .Y i, a i n �" 1-1 ' & t' 1y„ ,' � f,t4 , W A 1 i .••' id4 qsl . 1 . 1 iit9 i ! , f+ ; . 4 �....r:. ,4-..-_, T/ s, Previously Surveyed 'BLM Ref. #1105-04 GRI Project #2491 1 1 1 1 Y -1-1-F-1 �, -o BLM Land / (• 6)36' 117rj_.� Chiinney Rock • . Figure 2. Project location map (2 of 2) for the Class III cultural resources inventory for three proposed pipeline route segments in the Clear Creek and Deer Park areas of Garfield County, Colorado for CheveronTexaco. Areas surveyed are highlighted. [GRI Project #2533, BLM No. 1105-06, 6/02/05] Colorado Office of Archaeology and I-Iistoric Preservation CULTURAL RESOURCE SURVEY MANAGEMENT INFORMATION Please complete this form and attach a copy behind the 'Fable of Contents of each survey report. Project Class 111 cultural resource inventory of two proposed pipeline Route Segments (8.50 miles) in the Clear Creek and Deer Park Areas of Garfield County, Colorado for CheveronTcxaco. [GRI Project #2533, 06103/05j Acres of Potential Effect/Project: <30 Class III Acres Surveyed: 206 (166 acres private, 40 acres BLM) Legal Location of Project (add additional pages if necessary) Principal Meridian: 6th Quad map date: 1968 Quad Map Name: Long Point Quad map date: 1968 Quad Map Name: Long Point Township: 5 South Range: 98 West Sections: 36 Township: 6 South Range: 98 West Sections: 4, 9, 10, 11, 15, 22, 27, 33, and 34 Smithsonian Number Resource Type Eligibility Management Recommendation Q ;•^s r r a -c •J' o c $ a ' o i1 as w Not Eligible a 8 .2 Contributes to National Register No Further Work v a a c Test u m to Archival Research Other(specify) 50F351* X X X 5GF424* X X X 5GF425 X X X 3 1 2 2 1 Principal Investigator Name: Principal Investigators Signature: Carl E. Conner June 3, 2005 4Date: The next page of the report should be a copy of the USGS topographic map(s) clearly indicating the following: • The project area ♦ Areas surveyed • Principal Meridian, Township, Range, Sections • Quaci name and date(s) Introduction At the request of the Bureau of Land Management Grand Junction Field Office (BLM) and ChevronTcxaco, Grand River Institute (GR1) conducted a Class III cultural resources inventory of two proposed pipeline route segments in the Clear Creek and Deer Park areas of Garfield County, Colorado, for ChevronTexaco. These segments total approximately 8.5 miles long, of which 6.85 miles are located on private lands and 1.65 miles are on Bureau of Land Management administered property. A total of 166 acres of private property and 40 acres of BLM land was surveyed. The survey and report preparation were conducted by Carl E. Conner (Principal Investigator), Barbara J. Davenport, Nicole Darnell, Jim Conner and Dana Archuleta. A files search was completed on 19 May 2005, and the field inventory was carried out on May 31' and June 1s' of 2005. The survey was done to meet requirements of the Federal Land Policy and Management Act of 1976, the National Historic Preservation Act (as amended in 1992), the National Environmental Policy Act (NEPA) of 1969, and Article 80.1 of the Colorado Revised Statutes. These laws are concerned with the identification, evaluation, and protection of fragile, non-renewable evidences of human activity, occupation and endeavor reflected in districts, sites, structures, artifacts, objects, ruins, works of art, architecture, and natural features that were of importance in human events. Such resources tend to be localized and highly sensitive to disturbance. Location of the Project Arca The project area is located about 12 miles north of the town of De Beque in the Clear Creek and Deer Park areas of Garfield County, Colorado. In general, the pipeline will follow the west side of County Road 211 and the north side of the upgraded Deer Park Road, but the 200 foot wide inventory corridor includes both sides of these roads. The three segments of pipeline occur within T. 5 S., R. 98 W., Section 36; and 1'. 6 S., R. 98 W., Sections 4, 9, 10, 11, 15, 22, 27, 33, and 34; 6th P.M. (Figures 1 and 2). F,nvironnuent The proposed project is within the Piceance Creek Basin, one of the major geologic subdivisions of Colorado. The Piccance Creek Basin is an elongate structural downwarp of the Colorado Plateau province that apparently began its subsidence approximately 70 million years ago during the Laramide Orogeny. Sediments from surrounding highlands were deposited in the basin, accumulating to a thickness of as much as 9000 feet by the lower Eocene epoch, when subsidence ceased. Regional uplift occurred in the Late Tertiary, and erosion &the area has cbiitinted sinee (Young and Young 1977:43:46s) The Wasatch formation underlies the south portion of the study area, while the Green River Formation 1 occurs in the northern part. The project area rests within valley bottoms of the Roan Plateau. Elevations range from about 5500 to 6000 feet. These elevations have three vegetation communities including saltdesert shrublands, pinyon juniper woodlands, and sagebrush/grasslands. Ground visibility ranged from 30% in the sagebnish and greasewood to about 90% in the disturbed areas along the roads. These communities support a variety of wildlife species although the present day land use of the project area (including energy development, grazing, ranching and farming) has pushed most large mammals into the surrounding mountains. There, mule deer, elk, coyote, and black bear are common, as are cottontail rabbits, beavers, and various rodents. Mountain lion, bobcat, fox, skunk, badger, and weasel are also likely inhabitants. Bird species observed in the area include the jay, raven, red -shafted flicker, long-eared owl, and various raptors. There is little climate variation within the study area. These relatively low elevations are host to a cool semiarid climate where temperatures can drop to -10 degrees F during the winters and summer temperatures may reach 100 degrees F; there is a tnaximutn of 120 frost free days and the annual precipitation is about 14 inches. The surrounding higher elevations are characterized as cooler and moister. Annually, the high mountain temperatures could average 5 degrees cooler and the precipitation as much as 14 inches greater that the surrounding low elevations (USDA SCS 1978:244). Summary of Files Search and Literature Overview A records search was made for the project area through the BLM on 19 May 2005. An on-line search of the records at Colorado Historical Society's "Compass" site was also completed. These searches, which also included GLO Plats, were conducted to determine which areas were previously surveyed, to identify all known cultural resources in the vicinity of the study area, and to gather pertinent published and unpublished information on previous surveys in the innmediate area. This information is important in the interpretation and evaluation of the cultural resources that were expected to be found. The files search identified three historic sites within the project corridors. Two sites (5GF424 and 50F5425) are structures near the mouth of Clear Creek and one site is reportedly an historic race track (5GF351), all occurring on private property. In addition, there are nine sites in the general vicinity of the project area and these are listed in Table A-1 in Appendix A. Table A-2 (Appendix A) provides a bibliographic List of the previous projects conducted near the project area. Cultural resource investigations in the region have yielded surface diagnostic 2 artifacts and excavated cultural materials consistent with the regional cultural history. Evidence of the Paleoindian Era, the Archaic Era, Formative Era, and Protohistoric Era has been found in the area. Ilistoric records suggest occupation or use by EuroAmerican trappers, settlers, miners, and ranchers as well. Overviews of the prehistory and history of the region are provided in documents published by the Colorado Council of Professional Archaeologists' entitled Colorado Prehistory: A Context for the Northern Colorado Plateau (Reed and Metcalf 1999), and by the Colorado Historical Society entitled Colorado Plateau Country Historic Context (Husband 1984). A more specific document regarding the Euro -American settlement of the study area is History of Roan Creek and De Beque (Prather and de Beque, n.d.). As therein described, in the De Beque - Roan Creek area, the first to file homestead claims were Robert Eaton, L.T. Stewart and George Gibson along Dry Fork. Brothers Harvc and John Van Cleave filed claire to Roan Creek property and established a cattle business in 1883 that became well known in Western Colorado. Other creeks in the area are named for the early ranchers who often brought cattle and cowboys with them. Kimball Creek is named for Gayton and William Kimball. Con [now Conn] Creek is named for C.H. Conwell. Tom Wallace set up his outfit on Wallace Creek, and John Carr on Carr Creek. George and Frank Newton settled on Clear Creek --apparently named before they arrived. The importance of water --and water rights --to the settlers not only was acknowledged by naming the creeks after them but also by so naming the ditches. Accordingly, one will also find the familiar names of Charles Creek, Joe Newman, A.S. Himebaugh, Henderson Frashier, Tom King, George P. Anderson, George Hayes, and W.A. DcLaMatyr on ditches and ranches of the surrounding area. By 1888, at least 31 ranches were in active operation, and a total of 140 cubic feet of water had been filed on (ibid.:3-4). The town of De Beque is named for Dr. W.A.E. de Beque, who arrived with three companions (Fred Webster, John Boudin and Dick Smith) in the spring of 1884. He established a ranch on the banks of the Grand River near its confluence with Roan Creek. The first post office was within a log building built by Dr. de Beque, which served as his office, a drug store and a general store. Marie de Beque was the first Postmistress, officially named so in 1888. During this year, the town site of De Beque was established outside the boundary of the de Beque's ranch on what was originally the H.L. Spencer homestead. It was platted by surveyor John Walzl and given the name of De Beque in February of 1888. Shortly thereafter, Dr. de Beque built the first residence in the town (ibid.:3-4). Adjacent to Ravensbeque (Dr, de Beque's ranch), the first school was started in 1886 by Mrs. Joseph McMillen, who initially began teaching her own children, but soon took in others from the surrounding homesteads. About that same time, a public school was opened on Con [Conn] Creek. Later, county schools were opened on Brush Creek, Kimball Creek, Dry Fork and main Roan Creek. The school started by Mrs. McMillen was moved to town where various buildings served as classrooms until a stone schoolhouse was built in 1892. Grades through high school were added as were new buildings to the school grounds, and in 3 1912, the first class was graduated from the high school (Prather and de Beque, n.d.:6). The town grew steadily during the late 1800's and early 1900's, due in part to the coming of the railroad in May of 1890. It quickly became an areal center serving not only the Roan Creek ranches north of the Grand River, but also the Blue Stone Valley farms and ranches south of the river --after a bridge was built in 1891. Over the years, many people came and left, but the town's population rarely exceeded 400 persons (ibid.:7-9). Study Objectives The purpose of the inventory was to identify and record all cultural resources within the areas of potential impact, to assess their significance and eligibility to the National Register of Historic Places (NRHP), and to make management recommendations for those sites found to be eligible or potentially eligible. Based on the files searches cultural resources were expected to be encountered. Field Methods A Class 111 cultural resource inventory of the project areas was performed by two persons who walked zig zag transects along the two segments of the proposed pipeline route to cover a 60 meter (200 foot) wide corridor centered on the west side of the existing Clear Creek road and the north side of the Deer Park road. Crew members worked from USGS 7.5' series maps. Cultural resources were sought as surface exposures and were characterized as sites or isolated finds. Sites were defined by the presence of five or more artifacts and/or significant feature(s) indicative of patterned human activity. Isolated finds were defined by the presence of a single artifact or several artifacts, which apparently represent a single event (e.g., a single core reduction), and is surficial in nature. All cultural resources such as open camps, lithic scatters, and isolated finds were recorded as they were encountered. Sites were to be recorded using the following methods of mapping and note taking. The basic approach to the data collection was to be the continuous mapping of observed artifacts and features by recording UTM coordinates (NAD 83 Datum) using a Trimble Geo XT. Site maps were to be created using corrected GPS data and ARCMAP. Photographs were to be taken at each site and include general views and specific artifacts or features. Field notes and photo negatives for this project are on file at Grand River Institute, while the photographs are submitted to the BLM. No artifacts were collected. 4 Results As expected, cultural resources were encountered during the survey. Field conditions were as anticipated, and did not affect the methods. This portion of the report presents a discussion of site significance evaluation and describes the two previously re-recorded historic sites. Site Significance The National Historic Preservation Act of 1966 (NHPA) directs the BLM to ensure that BLM-initiated or authorized actions do not inadvertently disturb or destroy significant cultural resource values. Significance is a quality of cultural resource properties that qualifies theta for inclusion in the NRHP. The statements of significance included in this report are field assessments to support recommendations to the BLM and State Historic Preservation. Officer (SHPO). The final determination of site significance is made by the BLM in consultation with the SHPO and the Keeper of the Register. The Code of Federal Regulations was used as a guide for the in -field site evaluations. Titles 36 CFR 60, 36 CFR 800, and 36 CFR 64 are concerned with the concepts of significance and (possible) historic value of cultural resources. Titles 36 CFR 65 and 36 CFR 66 provide standards for the conduct of scientific data recovery activities. Finally, Title 36 CFR 60.4 establishes the measure of significance that is critical to the determination of a site's NRI -IP eligibility, which is used to assess a site's research potential: The quality of significance in American history, architecture, archaeology, and culture is present in districts, sites, buildings, structures, and objects of State and local importance that possess integrity of location, design, setting, materials, workmanship, feeling, and association, and a) that are associated with events that have made a significant contribution to the broad patterns of history; or b) that arc associated with the lives of persons significant in our past; or c) that embody the distinctive characteristics of a type, period, or method of construction, or that represent the work of a master, or that possess high artistic values, or that represent a significant and distinguishable entity whose components may lack individual distinction; or d) that have yielded, or may be likely to yield, information important in the prehistory or history. Site Description The Roan Creek Community Club (5GF424) was revisited just last year for another project so a new reevaluation form was not completed for this site. The Roan Creek School (5GF425), was revisited and reevaluated along with site 50F351, an historic race track. This section provides general descriptions of these sites. Location data for them is provided in Appendix A (Figure A-1). Detailed information for 5GF425 is provided in Appendix 13: 5 OAI-IP Site Form (available at the BLM and 0A1 -IP). Site 5GF351 was originally recorded only as a report from a local (unnamed) land owner in 1978 by the Museum of Western Colorado. The original site form contained very little information and an assessment of the reported location was never conducted. Upon revisiting the site, no indication of cultural manifestations remained. It could not be relocated by this inventory and there is no subsurface potential. Much of the site area has been previously disturbed by road construction and farming/ranching activities. Evaluation and Management Recommendation Due to a perceived lack of potential for this site to yield additional significant information regarding the area's history, this site is field evaluated as not eligible for listing on the National Register of Historic Places. No further work is necessary. Site 5GF424 is the Roan Creek Community Club building complex and is presently in use as the "Cowboy Chapel of Prayer." The site was previously recorded, however, that form was not signed or dated and contains limited information. The site is located at the confluence of Clear Creek (County Road 211) and Roan Creek (County Road 204) at an elevation of 5520 feet. Vegetation on the site is grass and the surrounding open areas contain sagebrush. Most of the ground around the structures is barren and includes a dirt parking area. The main focus of the site is a large milled log structure which measures 54 feet in length by 30 feet in width and rests on a concrete foundation. The south side (front) of the building has double door entryway which measures 7 feet by 15 feet and contains two, five - horizontal panel, plywood doors. The gable ends and the upper portion of the entryway have cedar shingle siding in a coursed pattern. The cast wall has three windows and one (newer) door opening and the west wall has four windows and a door while the rear wall and entryway each have two double windows of an older style of true divided lite glass with a pattern of 2W3H. The asphalt shingle roof appears to be new (the original site form states that the roof was of corrugated metal). Two brick chimneys are present, one in the center of the west wall and the other at the northeast comer of the building. Also, the concrete landing, stairs and iron hand rails at the entryway seem to have been replaced fairly recently. Approximately ten feet from the northwest corner of the main log structure is a storage shed which measures 12 feet by 8 feet and is constructed of milled lumber with a metal shed style roof. This building has a single door on its east side and a single small window on the south wall. Forty feet north-northeast from the northeast corner of the main 6 log building is an old privy with a wood shed style roof. The site has been well maintained and is currently in use. This structure is referenced in a booklet entitled, "Cattle and Shale, 1884-1984, A Story of Roan Creek and De Bcyue" in the section that discusses families and ranching on upper Roan Creek. The description from pages 13 and 14 is as follows: "A community hall, "Highmore Hall" was erected, which became the center of many social gatherings and dances. Plays, musicals, all day picnics, church services, and neighborhood gatherings of all kinds were held there. The guiding star and musical director of all this activity was Pearl Sullivan, the wife ofDougald Sullivan, whose ranch was the I-Iimebaugh ranch at the mouth of Clear Creek. Pearl and her music will long be remembered. There were other Sullivan brothers, too, wlio engaged in the cattle business here for years, but they are not here now. Other names closely associated with the development of the community are F lasche, Franklin, Firvin, Letson, Huntley, Gordon, and Simmons, but most of the people who bore those names and lived among us for awhile, are gone." Evaluation and Management Recommendation This site appears to meet criteria for National Register status (36 CFR 60.4 a, b and c) and is field evaluated as eligible for listing on the National Register of historic Places. It will not be directly affected by the proposed project and no further work is recommended. Site 5GF425 is the old Roan Creek School building. It is presently not in use. The site was previously recorded, however, the form was not signed or dated and contains limited information. The site is located along County Road 211 near the confluence of Roan and Clear Creeks in Garfield County at an elevation of 5530 feet. Surrounding vegetation is grass and sagebrush. The site consists of a one room school house with and an attached entryway/ mudroom. It is a framed structure with horizontal wood -siding. It was painted white sometime in the past, however, portions are beginning to weather or are lacking paint altogether. The main room has a front gabled roof of galvanized corrugated metal while the entry has a shed (half -gabled) roof of milled lumber with wood shake shingles (most of which are missing). The main room measures 22 feet by 14 feet and has five single hung windows (2 sashes each) on the east wall and one single hung window (2 sashes) on the west wall, all measuring approximately 24" by 60" overall. All these windows are authentic divided lite with a 2W1 H pattern to each sash, however the glass is no longer present. No window or door openings are on the south wall. 'Phis room has a brick chimney along the center of the west wall and extends on the exterior approximately five feet up from the roof (on its lowest side). The interior of this room possesses remnant areas of wall paper with a childlike motif 7 Appendix B: OAF1P Site Form B.1