The URL can be used to link to this page

Home My WebLink AboutApplication- PermitGARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT Permit N° 3951 109 8th Street Suite 303 Assessor's Parcel No. Glenwood Springs, Colorado 81601 Phone (303) 945-8212 INDIVIDUAL SEWAGE DISPOSAL PERMIT This does not constitute a building or use permit. PROPERTY r [//�\I I //11 (/1 �n(/�y c Owner's Name] P_Onardi C hnx IRS Present Address I Z 0 V I lig s'• a l if k.& Phone91— J 4t �q ( li`k—x4-Pi•>etr2 fl 379 - System Location Legal Description of Assessor's Parcel No. SYSTEM DESIGN 339(-Qg-b-aa2' Septic Tank Capacity (gallon) Other Percolation Rate (minutes/inch) Number of Bedrooms (or other) Required Absorption Area - See Attached Special Setback Requirements: Date Inspector FINAL SYSTEM INSPECTION AND APPROVAL (as installed) Call for Inspection (24 hours notice) Before Covering Installation System Installer Septic Tank Capacity ({ i SIC d'Y rtr' Septic Tank Manufacturer or Trade Name Septic Tank Access within 8" of surface Absorption Area Absorption Area Type andlor Manufacturer or Trade Name Adequate compliance with County and State regulations/requirements Other Date QQ Inspector � A-JS)Ic0 /.1.( RETAIN WITH RECEIPT RECORDS AT CONSTRUCTION SITE *CONDITIONS: 1. All installation must comply with all requirements of the Colorado State Board of Health Individual Sewage Disposal Systems Chapter 25, Article 10 C.R.S. 1973, Revised 1984. 2. This permit is valid only for connection to structures which have fully complied with County zoning and building requirements. Con- nection to or use with any dwelling or structures not approved by the Building and Zoning office shall automatically be a violation or a requirement of the permit and cause for both legal action and revocation of the permit. 3. Any person who constructs,alters, or installs an individual sewage disposal system in a manner which involves a knowing and material variation from the terms or specifications contained in the application of permit commits a Class I, Petty Offense ($500.00 fine —6 months in jail or both). White - APPLICANT Yellow - DEPARTMENT OWNER INDIVIDUAL SEWAGE DISPOSAL SYSTEM APPLICATION e/f,/ ~0 a014-44 ADDRESS No ✓,c*mi $ or i da -L4 -1..r PHONE 92-7• Cy/7-- CONTRACTOR b O/an/ ADDRESS 3Z $f6 /*'V* . EAS4-fT PHONE 17? • 3e 72 PERMIT REQUEST FOR (X NEW INSTALLATION ( ) ALTERATION ( ) REPAIR Attach separate sheets or report showing entire area with respect to surrounding areas, topography of area, habitable building, location of potable water wells, soil percolation test holes, soil profiles in test holes (See page 4). LO ATION OF PROPOSED FACILITY: Near what City of Town dE+b l--744,4dee Oc s z Size of Lot str; g2 -T44 - Legal Description or Address I*T 3 MAI/ irS eleeke>t,y✓ 01 nGQ VJ dQ.rRt WASTES TYPE: ( ) DWELLING ( ) TRANSIENT USE ( ) COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES ( ) OTHER—DESCRIBE BUILDING OR SERVICE TYPE: l X0617 Number of Bedrooms Number of Persons (X) Garbage Grinder ( ) Automatic Washer (D() Dishwasher SOURCE AND TYPE OF WATER SUPPLY: VI WELL ( ) SPRING If supplied by Community Water, give name of supplier: DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: N/ 4 ( ) STREAM OR CREEK Was an effort made to connect to the Community System? /✓/fl A site plan is required to be submitted that indicates the following MINIMUM distances: Leach Field to Well: 100 feet Septic Tank to Well: 50 feet Leach Field to Irrigation Ditches, Stream or Water Course: 50 feet Septic System (septic tank & disposal field) to Property Lines: 10 feet YOUR INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT WILL NOT BE ISSUED WITHOUT A SITE PLAN. GROUND CONDITIONS: Depth to first Ground Water Table Percent Ground Slope TYPE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED: SEPTIC TANK ( ) AERATION PLANT ( ) VAULT ( ) VAULT PRIVY ( ) COMPOSTING TOILET ( ) RECYCLING, POTABLE USE ( ) PIT PRIVY ( ) INCINERATION TOILET ( ) RECYCLING, OTHER USE ( ) CHEMICAL TOILET( ) OTHER -DESCRIBE FINAL DISPOSAL BY: 9() ABSORPTION TRENCH, BED OR PIT ( ) EVAPOTRANSPIRATION ( ) UNDERGROUND DISPERSAL ( ) SAND FILTER ( ) ABOVE GROUND DISPERSAL ( ) WASTEWATER POND ( ) OTHER -DESCRIBE WILL EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF THE STATE? AV PERCOLATION TEST RESULTS: (To be completed by Registered Professional Engineer, if the Engineer does the Percolation Test) t %. 0, Minutes per inch in hole No. 1 Minutes per inch in hole No. 3 Minutes per inch in hole No. 2 Minutes per inch in hole No. _ Name, address and telephone of RPE who made soil absorption tests: Name, address and telephone of RPE responsible for design of the system: Applicant acknowledges that the completeness of' the application is conditional upon such further mandatory and additional tests and reports as may be required by the local health department to be made and furnished by the applicant or by the local health department for purposed of the evaluation of the application; and the issuance of the permit is subject to such terms and conditions as deemed necessary to insure compliance with rules and regulations made, information and reports submitted herewith and required to be submitted by the applicant are or will be represented to be true and correct to the best of my knowledge and belief and are designed to be relied on by the local department of health in evaluating the same for purposes of issuing the permit applied for herein. I further understand that any falsification or misrepresentation may result in the denial of the application or revocation of any permit granted based upon said application and in legal a r perjury as provided by law. Signed PLEASE D TE MAP TO YOUR PRO Date ii-// PERTY! ! 0 i� ;6 r 0 4 • i 0 DAVIWONNSTONARCMITECTS LEONARD RESIDENCE LOTS, BARNES EXBMPB OARREGO COUNTY,COLORADO 0 CRONK' CONSTRUCTION • INCORPORATED 1129 -24- Road Grand Junction, CO 81505 970.245-0577, 970-257-7453 (fax) December 2, 2004 CERTIFICATE OF INSPECTION AND ACCEPTANCE Individual Sewage Disposal System Leonard Residence 0097 Wind River Road Carbondale, CO 81623 The individual sewage disposal system of reference was inspected on December 2, 2004. The system was found to conform with the plans and specifications set forth in the engineered sewage disposal system design for the aforementioned property prepared on June 30, 2004. Copies of the engineered plan may be obtained from the undersigned design engineer. Seal Thomas A. Croak, P.E. 1129 -24- Road Grand Junction, CO 81505 970-245-0577 f • 1/bD ruor nmmworn bn mo,no rmc- ,Jz mr—I p WZ b I by Ceopm olU£NGr o Z M m m p m m aa z n A m 0 z a ti 2 CR NK CONSTRUCTION 1NCORPORATED 1129.24• Road • Grand Junction, CO 81505 970.245-0577, 970.257.7453 (fax) INDIVIDUAL SEWAGE DISPOSAL SYSTEM DESIGN Date: June 30, 2004 Prepared by: Thomas A. Cronk, P.E. Cronk Construction Inc. 1129 -24- Road Grand Junction, CO 81505 245-0577 Type of Design: New Residence Owner: Charlie & Kate Leonard c/o Gary M. Johnson Wild Wild West Development Inc. 320 Big Pinon Drive Basalt, CO 81621 970-379-3632 Property address: 0097 Wind River Road, Carbondale, CO 81623 Tax schedule No.: 2391-283-00-228 Legal Descript: Lot 3, Barnes Exemption, Garfield County, Colorado Page 1 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1.0 Site History The site consists of approximately 8.4 acres of uncultivated native soil. Drainage is approximately 18% to the southwest. A percolation test/soils evaluation was conducted on the property of reference on 06/10/04 by Tom A. Crook, registered professional engineer (R.P.E.). Based on results from the 06/10/04 perc test/soils evaluation, an engineered ISDS has been prepared for the property. The 06/10/04 perc results are attached for reference as Appendix A. The locations of the perc excavations are shown on the attached plot plan. A discussion of developed design parameters and the engineered design follow. 2.0 Development of Design Parameters A soils observation trench (excavation hole 3) was excavated to a depth of 72" BGS (below ground surface). There was no evidence of ground water or high seasonal water table in the open excavation to a depth of 72" BGS. The soils evaluation indicates three distinct soil horizons underlie the site. A lithological description follows: deoth (in.1 description 0" - 24" sandy clay loam, light red; blocky and granular 24" - 60" clayey sand/unconsolidated weathered sandstone, chalky white 60"+ sandstone, chalky white The perc rate of the native soils will be limited by the formation of a biomat at the soil/absorption field interface. To account for the biomat formation, a design perc rate of 25 min/in. is chosen for overall system sizing. Page 2 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3.0 System Design AINFILTRATOR absorption trench is proposed for discharge of septic effluent at the site. Construction of the system will consist of excavating level trenches in the area comprising the absorption field. As shown in the attached septic layout plan, the trenches will be oriented perpendicular (i.e., long axis northwest to southeast) to the natural slope (southwest) to minimize the depth of excavation along the trench length. Each trench excavation shall be continued to a maximum depth of 12" BGS at the uphill side of the trench (see absorption field cross-section). Because of the sloping topography (approximately 18% to the southwest) excavation of a level trench will result in the downhill side of the excavation being approximately 6" BGS. After removal of surface soils, the open excavations will be disked or scarified to promote subsurface absorption. Following completion of the initial push -outs, INFILTRATORS will be used to construct a septic effluent distribution system in the open excavations. The INFILTRATOR effluent distribution system will be installed in accordance with the "Infiltrator Technical Manual", available from Infiltrator Systems Inc., 123 Elm Street, Suite 12, Old Saybrook, Connecticut 06475. Adjacent INFILTRATORS shall be fastened with a minimum of four (4) 3/4" x #8 self -tapping sheet metal or bright brass deck screws to prevent movement and separation during backfilling. Septic effluent will be transferred from the upper trench to each of the adjacent downhill trenches through a serial distribution network as shown in the attached construction details. The serial distribution connections between adjacent trenches will facilitate the saturation of the up hill trench before septic effluent is allowed to flow to each of the adjacent downhill trenches. As shown in the attached Absorption Field Cross Section, the bottom of the INFILTRATOR seepage trenches will be located a maximum of 12" below ground level. The installation will provide 48" of usable infiltration soil between the bottom of each INFILTRATOR trench and the underlying sandstone bedrock located below a depth of 60" BGS. After the INFILTRATORS are installed, the absorption field will be covered with a soil cap. The soil cap will consist of 18" to 24" (10" minimum required) of native soil. A minimum of 5% slope will be maintained to promote surface run off away from the absorption field. The installer should confirm the feasibility of gravity discharge of sewage effluent from the residence to the absorption field by field verification of assumed design parameters. Assumed design parameters with respect to gravity discharge include: • distance from the sewage pipe at exit from the foundation line to the absorption field - 100' or less, • elevation of the ground surface at entry to the absorption field shall be at least 24" below the invert elevation of the sewage pipe at exit from the foundation line. If field measurements do not confirm these design assumptions, gravity discharge of sewage effluent from the existing residence to the absorption field can not be assured and a lift pump may be required. Please contact the design engineer to address any design modifications necessary for effective operation of the ISDS if the above design assumptions are not upheld. The installer must also confirm the setbacks from property lines, building envelopes, and existing easements shown in the attached graphics are maintained. Additionally, any unknown utility lines, easements, or other adverse conditions disclosed during construction must maintain the required setbacks Page 3 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 listed on page 5 of this document. Finally, 4" clean outs shall be provided at maximum 100' intervals in all effluent lines exceeding 100' in length. A 1500 gallon septic tank will be installed to provide a minimum of 30 hours retention time for sewage effluent from the proposed four bedroom residence. A non -corrodible Orenco filter (model # FTW0444- 36A) shall be installed at the final outlet Tee of the septic tank or in the effluent line between the septic tank and the absorption field to limit the size of solids and sludge passing into the absorption fields. The filter must be accessible for cleaning and replacement from the ground surface. As discussed above, INFILTRATOR absorption trenches are proposed to discharge septic effluent to the underlying sub -soils. As shown in the attached graphics, the absorption trenches will consist of four (4) trenches 3' wide x 1' max. deep x 100' long with sixteen (16) standard INFILTRATOR units each for a total of sixty four (64) INFILTRATORS The absorption field will encompass a gross area of 1,200 square feet with an effective area (31 sq. ft. allowed area/INFILTRATOR) of 1,984 sq. ft. Calculations and design parameters used to size the absorption field follow. DESIGN CALCULATIONS AVERAGE FLOW FOR 4 BEDROOM HOME @ 200 GAL.IBEDROOM-DAY 4 X 200 = 800 GAL.IDAY PEAK FLOW = 150% OF AVERAGE = 1200 GAL.IDAY DESIGN PERCOLATION RATE = 25.0 MIN.IINCH A =Q f , WHERE, A = ABSORPTION FIELD AREA Q = PEAK FLOW t = PERC TIME/INCH A =I S 00 25.0 = 1200 SQUARE FEET INCREASE ABSORPTION AREA BY 40% FOR CLOTHES WASHER INCREASE ABSORPTION AREA BY 20% FOR GARBAGE GRINDER DESIGN AREA = 1200x1.6 = 1920 SQUARE FEET SIZE ADJUSTMENT FACTOR OF 0.5 FOR INFILTRATOR TRENCH SYSTEM ADJUSTED AREA = 1920 X 0.5 = 960 SQUARE FEET USE 64 STANDARD (11-10) INFILTRATORS @ 15.50 SQ. FT. EACH FOR TOTAL ABSORPTIVE AREA OF 64 X 15.50 = 992 SQ. Pt ABSORPTION FIELD SIZED AT FOUR (4) TRENCHES 3 FT. x 100 FT. = 1,200 SQ. FT. Page 4 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4.0 Site Specifid Installation/Operation Requirements The owner and system contractor shall be aware and comply with the following installation and system operation requirements. 4.1 Installation - Setbacks. Notifications. and Inspections • All installation activities shall be conducted in accordance with current Colorado Department of Health ISDS Regplations as well as anv relevant Garfield Countv regulations and requirements. If at anv time during construction. subsurface site conditions are encountered which differ from the design parameters developed in Section 2.0. construction activities will stop and the design engineer will be contacted to address any necessary design modifications. • Installation procedures including grade, location, setbacks, septic tank size, and absorption field size shall conform with the attached graphic details. Construction activities and system components will not encroach upon existing easements or utility corridors. A minimum of 6 R of undisturbed soil shall be maintained between individual absorption elements and the septic tank and/or adjacent absorption elements. Minimum site specific setbacks for system components are: Source Septic Tank Absorption Field Building Sewer water line 10' 25' 10' domestic well 50' 100' 50' dwelling 5' 20' property lines 10' 10' subsoil drains 10' 25' irrigation ditch open 50' 50' lined/gated 25 25' solid pipe 10' 10' • To avoid surface flow infiltration and saturation of the new absorption system, abandonment of irrigation in the vicinity of the disposal system is required. Diversion ditches necessary to divert surface flows around the new absorption bed must maintain the minimum setbacks listed above. • All sewer lines and effluent distribution piping shall be 4 inches in diameter and have glued joints. INFILTRATORS shall be placed level in the absorption field. All lines discharging sewage from the residence to the septic tank shall maintain fall of between 1/8 in. and 1/4 in. per foot and shall employ sweep 90's or 245's at all turns. Sewer lines from the dwelling to the septic tank and at least 6 ft from the septic tank outlet must meet minimum standard ASTM -3034. Sewer lines under driveways shall always meet minimum Schedule 40 PVC standards and shall be encased with corrugated metal pipe or flow fill when covered with less than 24" of soil. Page 5 of 8 • The installer shall not place fill in the open excavation until inspected and approved by the design engineer. Additionally, the final cover shall not be placed on sewer lines, septic tank, or the absorption area until the system has been inspected and approved by the design engineer. The installer shall provide 48 hour notice to the engineer for all required inspections. • It is recommended a minimum of 18" of soil cover (10" required) be maintained over all ISDS components to prevent freezing of septic effluent (excepting maximum 8" cover over septic access ports). Four inch clean outs shall be provided at maximum 100' intervals in all effluent lines exceeding 100' in length. • The effluent distribution system shall be constructed in accordance with the "Infiltrator Technical Manual" available from Infiltrator Systems Inc., 123 Elm Street, Suite 12, Old Saybrook, Connecticut 06475. • A non -corrodible Orenco filter (model # FTW0444-36A) shall be installed at the final outlet Tee of the septic tank or in the effluent line between the septic tank and the absorption field to limit the size of solids and sludge passing into the absorption field. The filter must be accessible for cleaning and replacement from the ground surface. • Adjacent absorption field trenches shall be connected by a serial distribution system to assure saturation of the upgradient trench before effluent is passed to the adjacent downgradient trench (see attached absorption field plan view and cross section details). • The surface cap shall consist of native soil with a minimum of 5% drainage away from the absorption field to promote surface runoff. • The system contractor shall be aware of the potential for construction activities to reduce soil permeabilities at the site through compaction, smearing, and shearing. The following precautions and construction procedures should be employed during installation to minimize disturbance to native soils: i. Excavation should proceed only when the moisture content of the soil is below the plastic limit. If a sample of soil forms a rope instead of crumbling when rolled between the hands it is too wet and should be allowed to dry before excavation continues. ii. Excavation and backfill equipment should work from the surface where at all practical to avoid compaction of the soils at depth. iii. The bottom and sidewalls of the excavation should be left with a rough, open surface. The appearance should be that of broken or ripped soil as opposed to a sheared, smeared, or troweled surface. Any smoothed or smeared surfaces should be removed with a toothed rake or shallow ripper taking care to remove loose residues from the bottom of the excavation by hand if necessary. iv. Care should be taken in placing fill materials in the excavation to avoid damaging the exposed soil surfaces. Page 6 of 8 4.2 Operation - Maintenance and Inspections • The owner shall install a structural barrier if necessary and take precautions to prevent vehicular traffic, excessive surface watering, accidental flooding, or other activities in the vicinity of the absorption field which may compact, saturate, or otherwise alter the subsurface soil parameters used in designing the septic system. • The owner will plant and maintain grass or other shallow rooted cover crop to prevent erosion and promote evapotranspiration over the absorption field. • The owner will inspect and maintain the required mounding and drainage away from the absorption field to prevent saturation from precipitation and surface flows. • To mitigate the generation of preferential flow channels which may compromise the operation of the system, the owner will inspect and prevent intrusion of burrowing animals and deep rooted plants into the absorption field. • The septic effluent filter shall be inspected and cleaned as necessary every six (6) months. • The owner will conduct periodic maintenance of the septic system by removing accumulated sludge from the septic tank every 3-4 years to prevent clogging of the absorption field. Page 7 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5.0 Limitations' This report is a site specific design for installation of an individual sewage disposal system and is applicable only for the client for whom our work was performed. Use of this report under other circumstances is not an appropriate application of this document. This report is a product of Crank Construction Incorporated and is to be taken in its entirety. Excerpts from this report may be taken out of context and may not convey the true intent of the report. It is the owner's and owner's agents responsibility to read this report and become familiar with the recommendations and design guidelines contained herein. The recommendations and design guidelines outlined in this report are based on: 1) the proposed site development and plot plan as furnished to Cronk Construction Incorporated by the client, and 2) the site conditions disclosed at the specific time of the site investigation of reference. Cronk Construction Incorporated assumes no liability for the accuracy or completeness of information furnished by the client. Site conditions are subject to external environmental effects and may change over time. Use of this plan under different site conditions is inappropriate. If it becomes apparent that current site conditions vary from those anticipated, the design engineer should be contacted to develop any required design modifications. Cronk Construction Incorporated is not responsible and accepts no liability for any variation in assumed design parameters. Cronk Construction Incorporated represents this report has been prepared within the limits prescribed by the owner and in accordance with the current accepted practice of the civil engineering profession in the area. No warranty or representation either expressed or implied is included or intended in this report or in any of our contracts. Thomas A. Cronk, P.E. o / Date 3o ) 2cr0 NOTE: This individual sewage disposal plan is meant to include the following four pages of graphics including: 1) plot plan, 2) septic layout plan, 3) absorption field plan view, and 4) absorption field cross section. The plan is not to be implemented in the absence of these related graphics. In addition, results from the percolation test and soils evaluation are included for reference as Appendix A. Page 8 of 8 -T-- • • • perc test — exCavationS S89'09'37'E 39105' c N 0 J S/ access easenent LEONARD RESIDENCE 0097 WIND RIVER RD, CARBONDALE 2391-283-00-228 PLOT PLAN JUNE 14, 2004 NORTH SCALE. 1'=200' provide 4' clean outs at fax 100' intervals m all eFFtuent lines exceeding 100' in length 25' 5'nm in 5 Na ‘44\ -\\1/4 .\17‘\\:i„ repair area 41* drive 1.500 gallon septic tank with OSI eFFluent filter Model R FTW0444-364 me n clean ou el o / 5etn°ck 50. °on tc rano sea a C r residence \oo 0 nun. 4' SCHD 40 PVC under drive, encase in 6' CMP or Flow Fill IF less than 24' cover. typ 011 tratFic areas NOTE THE FOLLOWING SETBACKS MUST BE MAINTAINED SEPTIC TANK ABSORPTION FIELD SPRINGS 50 WELLS 50' CISTERN 25 STREAM 50 DOMESTIC WATER LINE — 10' 100' 100' 25' 50' 25' y 0 64 standard inPotrator units configured in serial distribution as 4 rows of 16 units each row 0 NOTE CALL 1-800-922-1987 FOR UTILITY LOCATES BEFORE EXCAVATING NOTE GRAVITY DISCHARGE OF SEWAGE EFFLUENT FROM THE RESIDENCE TO THE DISPOSAL SYSTEM IS BASED ON THE FOLLOWING DESIGN ASSUMPTIONS' LENGTH OF SEWAGE PIPING FROM EXIT AT FOUNDATION LINE TO ENTRY TO ABSORPTION FIELD = 100' OR LESS ELEVATION OF GROUND SURFACE AT ENTRY TO ABSORPTION FIELD AT LEAST 24' BELOW INVERT ELEVATION OF SEWAGE PIPE AT EXIT FROM FOUNDATION LINE DISCLAIMER IF THESE DESIGN ASSUMPTIONS ARE NOT UPHELD DURING CONSTRUCTION GRAVITY DISCHARGE CAN NOT BE ASSURED AND A LIFT STATION MAY BE REQUIRED NOTE PROVIDE 4' CLEAN OUTS AT MAXIMUM 100' INTERVALS IN ALL EFFLUENT LINES EXCEEDING 100' IN LENGTH \ \ NOTE ABANDON FLOOD IRRIGATION WITHIN 50' OF ANY IS DS ELEMENT, TYPICAL LEONARD RESIDENCE 0097 WIND RIVER RD, CARBONDALE 2391-283-00-22B SEPTIC LAYOUT PLAN JUNE 29, 2004 SCALE I'=40' NORTH septic influent 64 standard infiltrator units conrigured in serial distribution as as 4 rows of 16 units each row T � • - I • - • 100' typ. • serialtterdistribution end-to-end, typ configuration, alternate typ 7 6' min, 10'-12' recommended, typ provide inspection/venting ports at each end of infiltrator trenches as shown ABSORPTION FIELD - PLAN VIEW SCALE! 1'=10' LEONARD RESIDENCE 0097 WIND RIVER RD, CARBONDALE 2391-283-00-228 ABSORPTION FIELD - PLAN VIEW JUNE 29, 2004 SCALE l'=20' i� 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 xnin 3/1 slope -11 1 111= HEW 11=W W=11 11=11 ti N II—ISI L—II dd�l.t N-0010 N o - J0 N Z JW EN to � x a W o u=3 O a ay0 m n O D/VE o 4 W WO J N Z Z T y 0 WO❑ W VI - r Lj o ›W - U 4 Z W J o z a U tan a G Z J r - K a W W¢3 o3 3)tt wIJYvIY ZJN o J 7 4 x O a z a o z o '-'zxax ttoz J at]NU OND 4 a ss o W f[ s ZOO W m 0 Q U G W O! u m n• 0)J iNWv �ozoo e oo,ZNN D m P - co NaN a n z,._a0J op N 1Za Wo 07 1 4 DU J o N a 1 N CROSS SECTION APPENDIX A SOILS AND PERCOLATION REPORT CRONK CONSTRUCTION INCORPORATED CRONK CONSTRUCTION INCORPORATED 1129.24- Road • Grand Junction, CO 81505 970.245.0577, 970-257-7453 (fax) SOILS AND PERCOLATION REPORT Date: June 10, 2004 Prepared by: Client: Thomas A. Cronk, P.E. 1129 -24- Road Grand Junction, CO 81505 245-0577 Charlie and Kate Leonard c/o Gary M. Johnson Wild Wild West Development, Inc. 320 Big Pinon Dr. Basalt, CO 81621 (970) 379-3632 Property address: 0097 Wind River Road, Carbondale, CO 81623 Tax schedule No.: 2391-283-00-228 Legal Descript.: Lot 3, Barnes Exemption, Garfield County, Colorado 1.0 Soils Evaluation The site consists of approximately 8.4 acres of uncultivated native soil. Drainage is approximately 18% to the southwest. A percolation test/soils evaluation was conducted on the property of reference on 06/10/04 by Tom A. Cronk, registered professional engineer (R.P.E.). A soils observation trench (excavation hole 3) was excavated to a depth of 72" BGS (below ground surface). There was no evidence of ground water or high seasonal water table in the open excavation to a depth of 72" BGS. The soils evaluation indicates three distinct soil horizons underlie the site. A lithological description follows: depth (in.) description 0" - 24" sandy clay loam, light red; blocky and granular 24" - 60" clayey sand/unconsolidated weathered sandstone, chalky white 60"+ sandstone, chalky white Pere holes were constructed in Excavation 1 at the surface and at a depth of approximately 40 in., in Excavation 2 at the surface and at a depth of approximately 42 in., and in Excavation 3 at the surface and at Page A-1 of A-3 7- 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 a depth of approximately 36 in. The holes appeared to be well saturated at the time of the test. Results of the percolation test are shown in Table 1. TABLE 1 Percolation Test Results 0097 Wind River Road Depth Time on 06/10/04 Time Perc Rate min/in 11:04 11:34 11:49 12:04 Drop Hole 1 - 0" to 13" 8.0 10.75 13.0 dry 45/5.0 9 Hole 1 - 40" to 54" 7.75 12.0 14.0 dry 45/6.25 7 Hole 2 - 0" to 15" 7.875 10.25 11.5 6013.625 17 Hole 2 - 42" to 56" 7.75 10.75 1 13.0 60/5.25 11 Hole 3 - 0" to 14" 7.375 10.25 11.75 60/4.375 14 Hole 3 - 36" to 50" 6.0 8.0 13.0 dry 60/7.0 9 2.0 Conclusions and Recommendations Soils at the site appear acceptable for implementation of an individual sewage disposal system (ISDS). The following site-specific considerations should be observed during implementation of the ISDS: • The bottom of the ISDS absorption field should be located no deeper than 12" BGS to maintain 4' of usable infiltration soil above the bedrock soils located at 60" BGS. The perc rate of the native soils will be limited by the formation of a biomat at the soil/absorption field interface. To account for the biomat formation, a design perc rate of 25 min/in. is chosen for overall system sizing. • Care should be taken during construction to avoid compaction and smearing of the exposed infiltrative surfaces and preserve the natural permeability of the native soils. Page A-2 of A-3 r 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3.0 Limitations • This report provides a professional assessment of the feasibility of implementing an individual sewage disposal system on the property of reference. The design parameters developed in this document are representative of the site conditions disclosed at the specific time of the site investigation. Site conditions are subject to change from external events both manmade (irrigation or pond construction) and naturally occurring (flooding or excessive precipitation). Cronk Construction Incorporated is not responsible and accepts no liability for any variation in assumed design parameters caused by external events. Cronk Construction Incorporated represents this report has been prepared within the limits prescribed by the owner and in accordance with the current accepted practice of the civil engineering profession in the area. No warranty or representation either expressed or implied is included or intended in this report or in any of our contracts. SEAL Page A-3 of A-3 Thomas A. Cronk t. 3a,zoo, Date