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HomeMy WebLinkAboutApplication- Permit/02/ CV°3 (7" _glauzfutitarm, GARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT Permit N2 3 8 8 7 109 8th Street Suite 303 Glenwood Springs, Colorado 81601 Phone (303) 945-8212 INDIVIDUAL SEWAGE DISPOSAL PERMIT Assessor's Parcel No. This does not constitute a building or use permit. PROPERTY � 'n1 T 1Ip p �/1t ) Q y Owner's Namd-X1'+11 i1."�j/oh( "�oA^` �f�p'Sl'Present Address '901 C'\Ill 65 %(b" r Phone 12-8 / & 75 System Location © / b T ! `^ cIereSet Pi�E� S U Car bs�c aee 3 ��o Legal Description of Assessor's Parcel No. O', ✓ ' v — - ' �— o ' 00 /.',L / /g� Rai -i su6d, SYSTEM DESIGN 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 Septic Tank Manufacturer or Trade Name Septic Tank Access within 8" of surface Absorption Area Absorption Area Type and/or Manufacturer or Trade Name Adequate compliance with County and State regulations/requirements Other p' J Date L�ot - Inspector 9 /-Q ni 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 line -8 months in jail or both). White - APPLICANT Yellow - DEPARTMENT f INDIVIDUAL SEWAGE DISPOSAL SYSTEM APPLICATION /9/6/042.0 .lt ri1.na seta iNtow OWNER ADDRESS i i. t a 0 0 PHONE 978 67/3 4 238 RECEIVED AUG 02 200? GARFIELD COUNTY MG &oP .176 ! o CONTRACTOR ADDRESS To .6 e r Je /c, n r PHONE RECEIVED OFT 17 2002 PERMIT REQUEST FOR: EW INSTALLATION () ALTERATION ( ) REPAIR GARFIELD COUNTY Attach separate sheets or report showing entire area with respect to surrq(gEMgNNING topography of area, habitable building, location of potable water wells, soil percolation test holes, soil profiles in test holes (See page 4). LOCATION OF PROPOSED FACILITY: Near what City or Town Size of Lot / 75 5/ Legal Description or Address WASTES TYPE: (L)aelling ( ) Non -Domestic Wastes ( ) Transient Use ( ) Commercial Or Industrial ( ) Other: Describe: Gtr•, CtdarE BUILDING OR SERVICE TYPE: Number of Bedrooms S Number of Persons jea f. / 0 () Garbage Grinder ((.) Automatic Washer (�shwasher SOURCE AND TYPE OF WATER SUPPLY: (.)'WELL () SPRING () STREAM OR CREEK If supplied by Community Water, give name of supplier. DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: 2 t meY.cs Was an effort made to connect to the Community System? ( ) Yes (t(No $8jAes 3 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 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: / l - 2. 7o TYPE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED: (peptic Tank () Aeration Plant () Vault () Vault Privy () Composting Toilet ( )Recycling/ Potable Use () Pit Privy ( ) Incineration Toilet ( ) Recycling/Other Use OChemical Toilet (tether -Describe: Alvan ceJ11>eets4enT-f% nJjS 74X -2o re e) to u/a-1'i/pa u�din) eta /2/fed- FINAL DISPOSAL BY: () Absorption Trench, Bed Or Pit () Underground Dispersal (9 Bove Ground Dispersal () Evapotranspiration () Sand Filter ( ) Wastewater Pond ( ) Other -Describe: -May veheL4b forites/ A!J WILL EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF THE STATE? /Yo PERCOLATION TEST RESULTS: (To be completed by Registered Professional Engineer, if the Engineer does the Percolation Test) Minutes / 0 per inch in hole No. 1 Minutes per inch in hole No. 3 Minutes C / 0 per inch in hole No. 2 Minutes per inch in hole No. 4 4 RPE WHO MADE SOIL ABSORPTION TESTS: Name: /1s/D1,4-fordl,'Pac... /e Alp INc . Address: 6-0200 Go<.Ntr /toe/ /rf /cA,w,na.4.5oritr Telephone: 770 ffr 7 Y E S RPE RESPONSIBLE FOR DESIGN OF THE SYSTEM: Name: IX:, s Env;inierri.v, KP4�,/ t//<</ e) Address: // 4-02 /Yla.,v 57re.fr to..&h.,.j.t/, Co 2 )' ' Telephone: 70 ¢ d 3/ j 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 rales 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. 1 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 action for perjury as provided by law. Signed: z7/707); `� r d�c a�✓/o%,N� Date: 7 /io% Z PLEASE DRAW AN ACCURATE MAP TO YOUR PROPERTY!! RECEIVED AUG 0 2 2002 May 1, 2002 Matt Miller Boehm Architects 23 A Warren Avenue Boston, MA 02116 GARFIELD COUNTY BUILDING & PLANNING RE: Residential Property — Proposed Individual Septic Disposal System (ISDS), Lot 1, May Fly Bend Ranch, Garfield County, Colorado SE Job No. 22049.01 Dear Matt: Pursuant to your request this letter presents our findings in regard to the feasibility and design for an On -Site Wastewater Systems (OWS) at the above referenced Site. Our evaluation of the site conditions is based on information provided by others for use in supporting your application to Garfield County. Our findings are in accordance with Garfield County ISDS Regulations and general Engineering guidelines regarding On -Site Wastewater Systems. We further understand your desire to have an advanced treatment jystem to provide superior effluent quality above the conventional requirements. We have reviewed the geotechical report and the site plan and formulated an OWS design as part of our scope of work. Conclusions Based on our findings we believe that the design and installation of an approved OWS is feasible in )ccordance with the Regulations of Garfield County and the State of Colorado. The OWS will be designed to treat the wastewater from an equivalent 5 -bedroom single-family home. Our design recommendations for an OWS include the installation of a 2000 -gallon concrete septic tank equipped with an Orenco Systems Advantex AX -20 treatment unit. This advanced treatment unit utilizes a self-contained recirculating packed bed filter. Treated effluent will discharge to a pump basin vault. This type of pressure dose system will provide controlled discharge to the dispersal mound. The treated effluent will pressure discharge to a new -engineered mounded soil dispersal system for tertiary treatment and infiltration into the ground. The soil dispersal system will consist of gravelless infiltration chambers installed over imported sand material and backfill with suitable fill capped with topsoil. The mound system will be located cross gradient of the proposed house, as delineated on the site plan. The OWS will meet all required setbacks and be installed within the general location indicated on the plan. Our design is outlined below. Proposed Site Conditions It is our understanding that you intend to construct a 5 -bedroom home. The proposed improvements will include a new OWS system with appropriate site grading. A new driveway and landscaping features are proposed. The surface grades, in the preferred location of the dispersal mound are between 1% and 2%. Subsurface Conditions We have reviewed the results of a subsurface investigation conducted on May 15, 2000 by Hepworth- Pawlak Geotechnical, Inc (HP). The HP report is dated June 16, 2000, Job Number 100 412. The subsoil 502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311• Fax (970) 704-0313 SOPRIS ENGINEERING LLC civil consultants Matt Miller SE Job No. 22049.01 May 1, 2002 Page 2 encountered at the site consists of afoot of topsoil overlying sand and silt with scattered gravel over relatively dense slightly silty sandy gravel with cobbles and occasional boulders. Groundwater was encountered at a depth of 4 feet in the test profile pit at the time of the investigation. We expect a maximum seasonal high ground water level to be approximately 1' higher than reported. Design Criteria/Flow Residence unit - 5 bedrooms @ 2 person /bedroom = 10 persons Max. Design flow (Qd) = # of people x 1.5(peak flow) gal/person/day. Gallons per day for the subject house = 75 gal/person/day Qd = 10*75*1.5 =1125 gal/day Septic Tank Design Based on Design Flow Qd. Qd = 1125 gal/day Volume (V) of tank = Design Flow * 1.25 (30 hour retention time) V = 1125 gal/day * 1.25 days = 1406 gallons To provide for optimal treatment and accommodation of the treatment unit we recommend a minimum tank size of 2000 gallons. Use one 2000 -gallon, concrete, dual compartment septic tank. Treatment System Design With respect to effluent quality, maintenance and operation requirements, a compact recirculating trickling packed bed filter treatment system packaged in and on a new concrete septic tank is the preferred method of treatment. The Orenco Systems Advantex-AX-20 is a "State of the Art" pre -manufactured package system that provides economical, quiet, odor free operation that provides excellent wastewater treatment, which exceeds the requirements of the EPA for secondary wastewater treatment. Raw sewage inters a standard 2 -compartment septic tank for conventional primary treatment. Clear zone effluent is filtered and pumped to a distribution manifold in the Advantex filter pod via a pump/filter vault assembly installed in the secondary septic tank compartment. Effluent percolates down through textile media and is collected in the bottom of the filter pod. The vertical textile media provides approximately 40,000 SF of surface area for bio -mat attachment. The treated effluent is discharged out of the filter pod to a recirculating splitter valve (RSV), which splits the flow between return flow back to the septic tank and flow to the dispersal/absorption field. During periods of no sewage loading all of the discharge is returned to the tank. The return flow is discharged back to the secondary compartment or if nitrogen removal is desired the return flow is discharged back to the primary compartment. The Advantex recirculating pump typically runs only 90 minutes per day. The Advantex AX -20 is designed to provide treatment resulting in effluent water quality parameter levels of 15 mg/L BOD and 15 mg/L TSS based on typical residential strength wastewater. Assuming an average BOD concentration of 150 mg/1 the unit will remove 90% of BOD and up to 85% total nitrogen removal. Matt Miller SE Job No. 22049.01 May 1, 2002 Page 3 Effluent Dispersal System Design Treated effluent is pressure discharged to the ground via a mounded soil infiltration system allowing the infiltration of treated effluent into the soil. The infiltration/dispersal field is sized adequately to maintain long-term acceptance of the treated effluent into the ground. We do not anticipate that a conventional bio mat will form on the bed surface. The bed will provide a means for achieving tertiary treatment (polishing). However for sizing the infiltration/dispersal system we are utilizing the guidelines approved by the State of Colorado for sizing of an absorption field. A soil infiltration/dispersal bed system, utilizing gravelless chambers is recommended. The chamber units may be backfilled with screened native and imported soils and installed over imported filter sand. The State allows a maximum 40% area reduction for the use of gravelless infiltration chambers in a bed configuration. Based on the hydraulic loading rate of the receiving soils and the absence of a conventional bio -mat on the infiltrative surfaces in the field we estimate that the long-term recovery rate of the daily peak loading will be less than 2 hours. Soil DispersaUlnfiltration Field System Design The average slope in the septic envelope location, just north of the building site, is 2-5 %. Based upon the percolation test rates, we propose replacing the sand, silt and gravel soils under the proposed infiltration bed with a minimum 2 feet of select sand. The size of the infiltration bed is based on the long-term acceptance loading rate for conventional sand soil of 1.20 gallon/day/SF A (SF) = Qd : where A = Area; Qd = Design flow (gal/day) LTAR LTAR = 1.20 g/d/SF This design calculation results in a recommended minimum absorption area: A= 1125 = 937 sq. ft. 1.20 Apply a 40% reduction for utilizing gravelless infiltration chambers. 937 x 0.6 = 562 sq. ft. Use 562 SF of trench with gravelless chambers: Assume 3 -foot wide by 6.25 -foot long chamber units. Assume 15.5 square feet per chamber: 562 sq.ft. = 36chambers Use 36 chambers for 562 SF. 15.5 sq.ft/chamber We recommend using a bed system composed of 2 beds with 2 rows each 56 feet long and 6 feet wide, containing 9 standard infiltration chamber units in each row. Excavate absorption field to accommodate a minimum 562 SF of interior surface area in the two beds with a 6' separation between beds. The top of the mound will be approximately 2' above existing grade with 3:1 side slopes to existing ground. Based on the height of the mound the field perimeter dimensions at the toe will be approximately 60 by 30 feet in a split bed configuration. This design is conservative based on the estimated recovery rate and the high quality of effluent applied to the bed. Matt Miller SE Job No. 22049.01 May 1, 2002 Page 4 Effluent Dosing Distribution System Due to the shallow ground water at 4 feet, the dispersal field will be installed in a mound necessitating the use of a pump system. An Orenco pump -basin vault shall be installed adjacent to the septic tank that will accept treated effluent from the advantex discharge line. A pressure discharge pipe and dosing pump assembly w/ automatic controls and alarms shall be installed components in the pump basin. Install a 24" diameter, 72" watertight riser vault with an insulated lid at the surface to easily inspect and maintain system components from the surface. The pump distribution system shall be installed to discharge effluent to the mounded infiltration/dispersal field through the distribution manifold in a flow splitter basin adjacent to the field. The dosing volume shall be a minimum of 50 gallons per dosing cycle. The approximate storage volume in the 24" diameter basin is 56 gallons. An Isolation ball valve will be installed on the pressure discharge line in the pump basin. Install a quick disconnect threaded coupler on the pump discharge line. Extend discharge lines up to within 12" of the access lid to provide easy access for maintenance of the pump. Install pump assembly, risers, electrical systems, floats and discharge line per manufactures installation guidelines. Use an Orenco systems model p 300511 dosing pump. The system shall be inspected by a qualified technician every six months. All installation and maintenance shall be performed by a qualified person, in accordance with the Installation & Maintenance Guidelines for the Orenco Systems components. The pressure discharge assembly shall be installed in a cold weather and drain back configuration to allow access to the assembly and the drain back of liquid in the discharge lines through an orifice drilled in a fitting, on the discharge side, at the bottom of the vertical distribution loop near the outlet port in the pump basin. The distribution manifold, in a flow splitter basin, shall distribute pressurized flow evenly to each chamber row in the dispersal fields through an individual distribution line to each chamber row. The effluent will discharge from the pump through a 1.25" line to the 1.25" manifold with four 1.0" distribution lines out to the inlet of each row in the field. The individual pressure pipes will connect, at the chamber inlet, to a 1 inch perforated distribution pipe running along each row of chambers in the beds. The invert of the effluent discharge line at the pump basin outlet port shall be at least 24" below the invert of the perforated distribution lines at the head of each chamber row. The transport line from the dosing pump to the absorption field shall be schedule 40 PVC with a maximum diameter of 1.25 inches. The trenches will be pressure dosed utilizing a maximum 1" diameter perforated pipe running the length of the trenches to the midpoint of the end chamber. An inspection port should be installed on the top mid -point cut out on the end chambers in each row. This will allow for checking the performance of the system over time. The orifices in the distribution lateral shall be 1/8" diameter spaced at a maximum 3' apart. The perforated distribution pipe will be installed at the top of the chambers and oriented to spray upward off -center. The effluent pump shall be sized to pump at a minimum velocity of 4 ft/sec. The dosing volume shall not exceed 50 gallons. A plastic ball valve will be installed on the end of the pressure distribution pipe to be visible and operational from the 4" inspection port. The ball valve may be used for flushing the line if necessary. The valve will always be closed during normal operation. Matt Miller SE Job No. 22049.01 May 1, 2002 Page 5 Control Systems An Orenco Systems control box will control all functions and monitoring of the installed system. The controls will record all operational cycles and will make adjustments if necessary. Alarms for the treatment system components in the septic tank and the distribution pump basin will be recorded and reset through the control box. A Vericomm Telemetry control will be installed with the control box to allow offsite monitoring, data collection and remote operational setting control. The system will be set up with this web -based technology for use by authorized operators. ISTS Operation and Maintenance Ownership of the system and responsibility for construction, repair and maintenance will remain with the Lot Owner. The owner shall retain the services of qualified personnel to inspect the OWS and to perform all maintenance and repairs necessary to ensure that the system is installed properly, is in good operating condition and is in compliance with the manufacturers performance requirements. The operating components of the OWS system will be inspected within 30 days of being placed into operation and thereafter at least biannually. Attached is a copy of a maintenance agreement with SCG Enterprises the company that will install the system. The OWS should require minimal maintenance. Several factors influencing the need for maintenance include: actual wastewater flows versus design flows, the volume of kitchen/domestic waste (excluding human waste and toilet paper), excessive household chemicals and other toxic liquids. The tank, dispersal field and other applicable treatment system components should be visually inspected bi-annually for debris, wear, damage, leaks, or other potential problems. In general, for a properly utilized system, septic tanks should be pumped and inspected every 2 - 4 years. The effluent filters should be cleaned every six months and at the time of pumping. Dispersal fields should be maintained with suitable cover and kept free of root invasive plants. Positive surface drainage away from the infiltration field should be maintained. Attached are an ISDS and Advantex operation and maintenance guide. Construction and Inspections Prior to construction of the permitted system the engineer should be contacted by the contractor and owner well in advance to provide adequate time to discuss the system components with the contractor, answer questions, resolve any conflict issues and schedule inspection site visits based on construction progress. County Regulations require that the Design Engineers of record perform site inspections of the permitted system during construction and provide "As -Built" documentation of the installed system to the County after construction is complete. General Notes 1) All materials and installation practices shall conform to the Garfield County Individual Sewage Disposal Regulation. 2) All sewer lines and distribution lines in the system shall be 4" Schedule 40 or SDR -35 PVC unless specified otherwise on the plans. Matt Miller SE Job No. 22049.01 May 1, 2002 Page 6 3) Add a two-way clean out on the service line from the house. 4) The system shall be plumbed to distribution effluent into the bed with equal distribution. 5) The contractor shall ensure that the concrete septic tank and sewer lines are watertight. 6) The trench area must be protected to prevent damage from vehicular or livestock traffic and must be crowned to divert drainage runoff away from the trenches to minimize surface infiltration. 7) The infiltration chambers shall be installed level in the bed. The top of the backfill over the chambers shall be covered with filter fabric or other suitable pervious material to prevent the migration of fines from the overlying topsoil layer. 8) The field must have a minimum cover of 12 inches. A final cover of topsoil suitable for vegetation, a minimum 4" deep, shall be placed from the top of the pervious cover layer to the finished surface grade. 9) The dispersal field must be sodded or covered with vegetative ground cover. 10) The treatment unit shall be installed by in accordance with the manufactures specifications and installation guidelines by qualified personal. Our design and recommendations are based upon data supplied to us. If proposed development plans are revised from those presented in this report, we should be notified to evaluate the effect it may have on our design. If you have any question or need any additional information, please call. Sincerely, SOPRIS ENGINEERING, LLC APPENDICES A HP REPORT B ADVANTEX TREATMENT SYSTEM B-1 Design Criteria Sheets B-2 Operation and Maintenance Manual C ISTS INSPECTION AND MAINTENANCE AGREEMENT D STATE OF COLORADO CERTIFICATION LETTER E ISDS OPERATION AND MAINTENANCE GUIDE t?DoGs.6j Hepworth-Pawlak Geotechnical, Inc. 5020 County Road 154 Glenwood Springs, Colorado 81601 Phone: 970-945-7988 Fax: 970-945-8454 hpgeo@hpgeotech.com PRELIMINARY GEOTECHNICAL STUDY PROPOSED 4 LOT SUBDIVISION MAYFLY BEND RANCH EAST OF CARBONDALE GARFIELD COUNTY, COLORADO JOB NO. 100 412 JUNE 16, 2000 PREPARED FOR: GEORGE KELBY c/o IVAN PERRIN 8088 COUNTY ROAD 117 GLENWOOD SPRINGS, COLORADO 81601 HEPWORTH - PAWLAK GEOTECHNICAL, INC. June 16, 2000 George Kilby c/o Ivan Perrin 8088 County Road 117 Glenwood Springs, Colorado 81601 . .,. Job No. 100 412 Subject: Report Transmittal, Preliminary Geotechnical Study, Proposed Four Lot Subdivision, Mayfly Bend Ranch, East of Carbondale, Garfield County, Colorado. Gentlemen; As requested, we have conducted a preliminary geotechnical study for the proposed ' residential development. The property is suitable for the proposed development based on geologic and geotechnical conditions. Geologic hazards include flooding and potential sinkhole development. Subsurface conditions encountered in the exploratory pits excavated in the general proposed building areas consist of about ' to 1 foot of topsoil and nil to 11/2 feet of sand and silt overlying relatively dense slightly silty sandy gravel containing cobbles and occasional boulders. Groundwater was encountered at depths between 21 and 5 feet in the pits. Spread footings placed on the natural sandy gravel subsoils and designed for an allowable bearing pressure of 3,000 psf appear suitable at the building sites. The foundations should be kept relatively shallow due to the shallow groundwater. Slab -on - grade lower floor construction is recommended. The report which follows describes our investigation, summarizes our findings, and presents our recommendations suitable for planning and preliminary design. It is important that we provide consultation during design, and field services during construction to review and monitor the implementation of the geotechnical recommendations. If you have any questions regarding this report, please contact us. Sincerely, ORTH - PAWL GEOTECHNICAL, INC. E. TABLE OF CONTENTS PURPOSE AND SCOPE OF STUDY 1 PROPOSED DEVELOPMENT cr. 1 SITE CONDITIONS 2 GEOLOGIC CONDITIONS 2 FIELD EXPLORATION 3 SUBSURFACE CONDITIONS 3 PRELIMINARY DESIGN RECOMMENDATIONS 4 FOUNDATIONS 4 FLOOR SLABS 4 SURFACE DRAINAGE 4 PERCOLATION TESTING 5 LIMITATIONS 5 REFERENCES FIGURE 1- 'VICINITY MAP FIGURE 2 - LOCATION OF EXPLORATORY PITS FIGURE 3 - LOGS OF EXPLORATORY PITS FIGURE 4 - SWELL -CONSOLIDATION TEST RESULTS FIGURES 5 & 6 - GRADATION TEST RESULTS TABLE I - SUMMARY OF LABORATORY TEST RESULTS H -P GEOTECH PURPOSE AND SCOPE OF STUDY This report presents the results of a preliminary geoteclinical study for the proposed Mayfly Bend Ranch development to be located immediately south of the Roaring Fork River and north of County Road 100 in Garfield County, Colorado. The project site is shown on Fig. 1. The purpose of the study was to evaluate the geologic and subsurface conditions and their impact on the project. The study was conducted in accordance with our agreement for geotechnical engineering services to George Kilby, dated May 11, 2000. An interim report of the study was presented in a letter dated May 17, 2000, Job No. 100 412. A field exploration program consisting of a reconnaissance and exploratory pits was conducted to obtain information on the site and subsurface conditions. Samples of the subsoils obtained during the field exploration were tested in the laboratory to determine their classification, compressibility and other engineering characteristics. The results of the field 'exploration and laboratory testing were analyzed to develop recommendations for project planning and preliminary design. This report summarizes the data obtained during this study and presents our conclusions and recommendations based on the proposed development and subsurface conditions encountered. PROPOSED DEVELOPM2NT The proposed development will consist of a four lot subdivision as shown on Fig. 1. The development will consist of single family homes. Private driveways will access the building sites. We assume the residences will be two stories of wood frame construction with slab -on -grade lower floors. The development will be serviced with individual wells and septic disposal systems. If development plans change significantly from those described, we should be notified to re-evaluate the recommendations presented in this report. H -P GEOTECF{ -2 - SITE CONDITIONS The proposed development is located in portions of Se`ctibts 35 and 36, T 7 S, R 88 W. The proposed residences will be located on the lots shown on Fig. 2. The site is irrigated pastureland vegetated with cottonwood trees, grass and weeds. Irrigation ditches are present on the property. The Roaring Fork River is located to the north of the property. The terrain is relatively flat. GEOLOGIC CONDITIONS The property is located on relatively flat terrain near the Roaring Fork River. The surficial soil deposits are mapped as stream channel, flood plain and low -terrace deposits (Kirkham and Widmann, 1997). A hydrologist should evaluate the flooding potential at the site. Regional geologic mapping shows that the formation rock in the area is the Pennsylvanian -age Eagle Valley Evaporite (Kirkham and Widmann, 1997). These rocks are a sequence of gypsiferous shale, fine-grained sandstone/siltstone and limestone with some massive beds of gypsum. There is a possibility that massive gypsum deposits associated with the Eagle Valley Evaporite underlie portions of the property. Dissolution of the gypsum under certain conditions can cause sinkholes to develop and can produce areas of localized subsidence. Sinkholes associated with the Eagle Valley Evaporite have been mapped in areas of the Roaring Fork Valley. Sinkholes were not observed in the immediate area of the subject site. No evidence of cavities was encountered in the subsurface materials; however, the exploratory pits were relatively shallow, for foundation design only. Based on our present knowledge of the subsurface conditions at the site, it cannot be said for certain that sinkholes will not develop. The risk of future ground subsidence on the property throughout the service life of the development, in our opinion, is low; however, the owners should be made aware of the potential for sinkhole development. If further investigation of possible cavities in the bedrock below the site is desired, we should be contacted. No H -P GEOTECH -3 - potentially active faults are mapped in the project area (Kirkham and Rogers, 1981) and UBC Seismic Risk Zone I design parameters are considered appropriate for structural seismic design of the structures. t.. FIELD EXPLORATION The field exploration for the project was conducted on May 15, 2000. Five exploratory pits were excavated at the locations shown on Fig. 1 to evaluate the subsurface conditions. The pits were dug with a rubber -tired backhoe. The pits were logged by a representative of Hepworth-Pawlak Geotechnical, Inc._ Samples of the subsoils were taken with relatively undisturbed and disturbed sampling methods. Depths at which the samples were taken are shown on the Logs of Exploratory Pits, Fig. 2.. The samples were returned to our laboratory for review by the project engineer and testing. SUBSURFACE CONDITIONS Graphic logs of the subsurface conditions encountered at the site are shown on Fig. 2. The subsoils consist of about lh to 1 foot of topsoil and nil to 1' feet of sand and silt with scattered gravel overlying relatively dense, slightly silty sandy gravel containing cobbles and occansional boulders. Laboratory testing performed on samples obtained from the pits included natural moisture content and density and gradation analyses. Results of consolidation testing performed on a relatively undisturbed drive sample of the upper silt and sand, presented on Fig. 4, indicate moderate compressibility under conditions of loading and wetting. Results of gradation analyses performed on bulk samples (minus 3 and 5 inch fractions) of the natural coarse granular soils are shown on Figs. 5 and 6. The laboratory testing is summarized in Table I. Groundwater was encountered in the pits at depths of 21/2 to 5 feet. The upper subsoils were slightly moist to moist. H -P GEOTECH - 4 - PRELIMINARY DESIGN RECOMMENDATIONS The conclusions and recommendations presented below aze based on the proposed development, subsurface conditions encountered in the exploratory pits, and our experience in the area. The recommendations are suitable for planning and preliminary design but site specific studies should be conducted for individual lot development. FOUNDATIONS Bearing conditions are similar throughout the project site. Based on the nature of the proposed construction spread footings bearing 9n the natural sandy gravel subsoils should be suitable at the building sites. We expect the footings can be sized for an allowable bearing pressure of 3,000 psf. Due to the shallow groundwater, foundations should be kept relatively shallow for construction in the dry. Below grade crawlspace and basement areas should be avoided. Foundation walls should be designed to span local anomalies. The footings should have a minimum depth of 36 inches for frost protection.. FLOOR SLABS Slab -on -grade construction should be feasible placed on the natural granular soils or structural fill. To reduce the effects of some differential movement, floor slabs should be separated from all bearing walls and coblmns with expansion joints. Floor slab control joints should be used to reduce damage due to shrinkage cracking. A minimum 4 inch thick layer of free -draining gravel should underlie slabs -on -grade to facilitate drainage. SURFACE DRAINAGE The grading plan for the subdivision should consider runoff through the project and at individual sites. Exterior foundation backfill should be well compacted and have a positive slope away from the building so that water does not pond within 10 feet of H -P GEOTECH -5 - the building. Roof downspouts and drains should discharge well beyond the limits of all backfill. PERCOLATION TESTING .iter,, Percolation tests were conducted on May 15, 2000 to evaluate the feasibility of infiltration septic disposal systems at the site. One to two percolation test lioles had been dug on each lot and soaked by the client prior to our testing. The soils exposed in the percolation holes are similar to those exposed in the pits shown on Fig. 3 and consist of about' to 1 foot of topsoil and nil to ilk feet of sand and silt overlying relatively dense, slightly silty sand gravel containing cobbles and occasional boulders. The percolation test results are presented on Table II. The test results indicate infiltration rates between 7 and 15 minutes per inch. Based on the shallow groundwater encountered at the site, mounded septic disposal systems will likely be needed. Additional testing should be conducted for design on the individual lots at the planned septic disposal locations. LIIVIITATIONS This study has been conducted according to generally accepted geotechnical engineering principles and practices in this area at this time. We make no warranty either expressed or implied. The conclusions and recommendations submitted in this report are based upon the data obtained from the field reconnaissance, review of published geologic reports, the exploratory pits located as shown on Fig. 1, the proposed type of construction and our experience in the area. Our findings include interpolation and extrapolation of the subsurface conditions identified at the exploratory pits and variations in the subsurface conditions may not become evident until excavation is performed. If conditions encountered during construction appear different from those described in this report, we should be notified so that re-evaluation of the recommendations may be made. H -P GEOTECH -6 - This report has been prepared for the exclusive use by our client for planning and preliminary design purposes. We are not responsible for technical interpretations by others of our information. As the project evolves, we should provide continued consultation, conduct additional evaluations and review and'mioffitor the implementation of our recommendations. Significant design changes may require additional analysis or modifications to the recommendations presented herein. We recommend on-site observation of excavations and foundation bearing strata and testing of structural fill by a representative of the geotechnical engineer. Respectfully Submitted, HEPWORTH - PAWLAK ► FtI C air N,O1�pNG4. 0.`. '`it0 c— Jordy Z. Adamso Reviewed by: aniel E. Hardin, JZA/ksm cc:: OTAK Rock Creek Studio - Attn: Dave Michaelson Sopris Engineering - Attn: Yancy Nichol REFERENCES Kirkham, R.M. and Rogers, W.P., 1981, Earthquake Potential in Colorado, A Preliminary Evaluation, Colorado Geological Survey Bulletin 43. Kirkham, R.M. and Nodman, B.L., 1997, Geologic Map of the Carbondale Quadrangle, Garfield County, Colorado, Colorado Geological Survey Open File Report 97-3. H -P GEOTECH Sal -1 LOT 4 Q P-1 • PIT 1 A \ P-2Vised i / / / /P-3 1 / / A / IT 2 11 1 / OT 3 `/ �P-41 �.``\ LOT 2 / / P-6 Q L.,/ .��` 1 / PIT 4S j`/ N. P-74%..... / .� / / / P-5 / / BARN 1 / 0 / AREA . � L — — —/ � / /--� Iot+ / / 1 J PIT 5� / I ` LOT 1 P—g LEGEND • EXPLORATORY PIT A PERCOLATION TEST APPROXIMATE SCALE 11. = 750' 100 412 HEPWORTH - PAWLAK GEOTECHNICAL, INC. LOCA11ON OF EXPLORATORY PITS Fig. 2 Am, 0 0 5 10 LEGEND: TOPSOIL; sandy silt and clay, organic. firm, moist, dark brown. PIT 1 PIT 2 PIT 3 PIT 4 PIT _+4=62 11 WC -24.7 -200-5 0D-92 J l.� vv WC=20.8 00-96 200-42 tar:. :PO _ +4=63 -200-5 0 5 10 — SAND AND SILT (SM—ML);with gravel, medium stiff, slightly moist to moist, reddish brown. porous. GRAVEL (GP—GM); sandy, slightly silty, with cobbles and occasional boulders, medium dense to dense, slightly moist to wet below water levels, reddish brown to brown. 2" Diameter hand driven liner sample. i Disturbed bulk sample. Water level in pit at time of excavation. Caved depth. NOTES: 1. Exploratory pits were excavated on May 15, 2000 with a backhoe. 2. Locations of exploratory pits were measured approximately by pacing from features on the site plan provided. 3. Elevations of exploratory pits were not measured and logs of exploratory pits are drawn to depth. 4. The exploratory pit locations should be considered accurate only to the degree Implied by the method used. 5. The lines between materials shown on the exploratory pit logs represent the approximate boundaries between material types and transitions may be gradual. 6. Water level readings shown on the logs were made at the time and under the conditions indicated. Fluctuations in water level may occur with time. 7. Laboratory Testing Results: WC = Water Content ( ) DD = Dry Density ( pcf ) +4 = Percent retained on No. 4 sieve —200 = Percent passing No. 200 sieve Depth — Feet 100 412 HEPWORTH — PAWLAK GEOTECHNICAL, INC. LOGS OF EXPLORATORY PITS Fig. 3 Compression % m (1+ ? Ir,.;,_ Moisture Content = 24.7 percent Dry 'Density = ' ' 92 pcf Sample of. Silty Sand From: Pit 4 at 1.5 Feet No movement upon wetting 11 II 9 0.1 1.0 10 100 APPLIED PRESSURE — ksf 100 412 HEPWORTH - PAWLAK GEOTECHNICAL, INC. SWELL-CONSOLIDAT1ON TEST RESULTS Fig. 4 r24 HR. TNR 45 MN Lit 1 • • N P. 1 •_:C_NT PASS t 90 60 70 60 50 40 30 20 10 0 HYDROMETER ANALYSIS 70E READINGS 60 MIN.19 MN. 4 WIN. 1 MN. 1 U.S. STANDARD SERIES n SIEVE ANALYSIS CLEAN SQUARE OPENINGS 6 48 f4 3$'1/2'3/4' 71)2' 3' SB' 6'0 1 .001 .002 .005 .009 .019 .037 .074 .150 .3® .600 1.18 2.38 4.75 9.512_5 160 DIAMETER OF PARTICLES IN MILLIMETERS 10 20 30 40 50 60 70 60 90 37.5 76.2 152 203°° 527 C0BBLES CLAY TO SILT SAND 01.5VEL FINE 1 IOW IODARSE r ENE 1 COARSE GRAVEL 72 7. LIQUID LIMIT SAMPLE OF: Sandy Grovel with Cobbles SAND 26 % SILT AND CLAY 2 PLASTICITY INDEX FROM: Pit 2 at 3 thru 4 Feet HYDROMETER ANALYSTS 70.E READINGS SEW ANALYSIS 24 HR. 7 1411 45 MN. 15 MN. 60 16119 MIN. 4 MIN. 1 104. 100 B0 I0 70 60 50 40 30 20 10 0 .001 .002 .005 .009 .019 .057 LS STANDARD SERIES B CLEAR SQUARE OPENINGS .54 3$'1 3/4' 11/r r S6' B'0 .074 .150 .300 .600 1.16 2.38 4.75 9.5.12.5 160 DIAMETER OF PARTICLES IN MILOMETERS 10 20 30 40 50 60 70 30 90 100 37.5 7621 152 203 CLAY TO SILT COBBLES 100 412 GRAVEL 62 % SAND 33 % SILT AND CLAY 5 % 'LIQUID LIMIT % PLASTICITY INDEX % SAMPLE OF: Slightly Silty Sandy Gravel with FROM: Pit 3 at 2 thru 3 Feet Cobbles HEPWORTH — PAWLAK GEOTECHNICAL, INC. 7IT ZUSlAx:11Z1211, g*:t bt:l*r1121. GRADATION TEST RESULTS Fig. 5 1 I21:161lit15..1:11Rr 24 NR. 7 NR 45 LEN. 15 /AN. 100 90 60 70 60 SD 40 30 20 10 0 NYOROMEIER ANALYSIS 1Iff READINGS 60 1EN.19 MN. 4 10N. 1 YIN. U.S. STANDARD SEAES 1200 /100 /50 /30 116 SEW ANALYSIS 1 CLEAR SQUARE OPENINGS %6 /4 3/tI/2'3/4' 11/2' S r6' U sns� �- ���� EOM EMS WWI Ma I -- MI= • — I_ i —Mta —_ M - IOW S -A __-- • t -- --- _ MMI IMM �- • a a min =Ira -- impmuri IMI ES MM'a W — =ISM a • I MI' AM���-- EMI AME���-- i����-- PIM MIS MOP MOM .11 211/ IIMIIIM EMI • • , NMI .001 .002 .005 .009 .019 .037 .074 .150 .300 .800 1.16 2.36 4.75 931.0 19.0 37.5 DIAMETER OF PARTICLES IN MIWMETERS 10 20 30 40 50 60 70 SO 90 100 762 152 203 CLAY TO SEAT 1 NNE 1 YEOkIM ICOANSE 1 FRE 1 COARSE COBBLES GRAVEL 63 % LIQUID LIMIT % SAND 32 % SILT AND CLAY 5 % PLASTICITY INDEX 7. SAMPLE OF: Slightly Silty Sandy Gravel FROM: Pit 5 at 3 to 4 Feet 100 412 HEPWORTH — PAWLAK I GEOTECHNICAL, INC. 110:1.121MtMLIN IC GRADATION TEST RESULTS Fig. 6 JOB NO. 100 412 SUMMARY OF SOIL OR BEDROCK TYPE 13 >:, .- 0 Sandy Gravel with Cobbles Slightly Silty Sandy II Gravel with Cobbles Very Silty Sand II Very Silty Sand Slightly Silty Sandy Gravel . UNCONFINED COMPRESSIVE STRENGTH IPSFI ATTERBERG UMITS U 2,1 E 2 G F a - j J PERCENT PASSING NO. 200 SIEVE Q1 r 2 ID N� 5 zw- o F c 3 a x 26 33 32 J 0 23:(0 72 62 63 NATURAL DRY DENSITY Oct/ 92 O NATURAL MOISTURE CONTENT I%I O I 24.7 00 O N I1 SAMPLE LOCATION a - r 3 to 4 2 to 3 Al e N 3 to 4 N M 1- Lo HEPWORTH-PAWLAK GEOTECHNICAL, INC. TABLE II PERCOLATION TEST RESULTS JOB NO.100 412 Page 1 of 3 HOLE NO. HOLE DEPTH (INCHES) LENGTH OF INTERVAL (MIN) WATER DEPTH AT START OF INTERVAL (INCHES) tea. WATER DEP'1t AT END OF INTERVAL (INCHES) DROP IN WATER LEVEL (INCHES) AVERAGE PERCOLATION RATE (MIN./INCH) P-1 20 15 water added 16 12' 3 y 8 12% 10A 2'h 10 y 8 2 A 11 % 9 2 'A 9 7 2 7 5 1 1 % 5'1/ 3 ' 1 % P-2 15 1/2 15 water added 10 6% 3y 8 6° 4 2% 4 1 % 2 'A 11 1/4 9 2 'h 9 7 2 7 5 'A 1 % 51/4 3y 2 P-3 13 '/ 15 water added water added 9 y 5 4 y 5 334 1'% 3 's 2 '/4 1 y4 9 6 '/: 214 6' 4 % 2 4% 3 1y 3 1 % 1 y 7 % 5 '% 2 % 5'% 4 1 % 9 Note: Percolation test holes had been dug and soaked by the client prior to our testing. Percolation tests were conducted on May 15, 2000. The average percolation rates were based on the last three readings of each test. HEPVVORTH-PAWLAK GEOTECHNICAL, INC. TABLE II PERCOLATION TEST RESULTS JOB NO. 100 412 Page 2 of 3 HOLE NO. HOLE DEPTH (INCHES) LENGTH OF INTERVAL (MIN) WATER DEPTH AT START OF INTERVAL (INCHES) :1:::::,,... WATER DEPT AT END OF INTERVAL (INCHES) DROP IN WATER LEVEL (INCHES) AVERAGE PERCOLATION RATE (MIN./INCH) P4 15% 15 water added water added 8'h 5% 3% 7 5Y 3'/ 2 10 6'/4 3 % 6' 314 2% 10 '% 6 % - 3 % 6 '/: 34/4 2 % 3' 2'/4 1 Yz P-5 14 15 water added 9Yi 7° 1'/4 15 7 %4 6 / 1 1/4 6Yi 5% 1'/ 5% 4'/ 1 9 7 14 1 '/z 7'/ 6114 1 6Ya 5% 1'/4" 5 '/4 4 'h % P-6 16 15 water added 10% 8'h 2 12 8K 7'A 1 7h 6X 1 6 Y, 5 1 Y: 10 '/a 9 % Y4 93/4 834 1 8% 71 1'/z 7 'k 6 1 Y4 Note: Percolation test holes had been dug and soaked by the client prior to our testing. Percolation tests were conducted on May 15, 2000. The average percolation rates were based on the last three readings of each test. Test P-4 was based on the last two readings. HEPWORTH-PAWLAK GEOTECHNICAL, INC. TABLE 11 PERCOLATION TEST RESULTS JOB NO.100 412 Page 3 of 3 HOLE NO. HOLE DEPTH (INCHES) LENGTH OF INTERVAL (MIN) WATER DEPTH AT START OF INTERVAL (INCHES) WATER LI PPR AT END OF INTERVAL (INCHES) DROP IN WATER LEVEL (INCHES) AVERAGE PERCOLATION RATE (MIN./INCH) P•7 15 15 water added 10Y: 8'h 2 14 8'/z 6'/s 1 34 64 5'/ 114 5 %= 4 1 1 10 8 '/4 1 'k 8 '/4 734 1 714 6'% 1 34 614 514 1 Note: Percolation test holes had been dug and soaked by the client prior to our testing. Percolation tests were conducted on May 15, 2000. The average percolation rates were based on the last three readings of each test. AdvanTef-AX Treatment Systems Overview Orenco's AdvanTexTm-AX Treatment System is an innovative technology for onsite treat- ment of wastewater. The heart of the System is the AdvanTexim-AX Filter, a sturdy, water- tight fiberglass basin filled with an engineered textile material. This Lightweight, highly absorbent textile material treats a tremendous amount of wastewater in a small space. For example, the AX10 model has more than 20,000 square feet of surface area for biological breakdown of wastewater components, yet has a footprint of only 10 sq.ft. System Performance Orenco Systems® has been researching, designing, and testing a variety of textile filters for more than 5 years. Orenco's textile filters have been installed throughout the United States on hundreds of sites, including federal demonstration projects, university testing facilities, single-family homes, commercial properties, and community systems. Unlike other wastewater treatment technologies, the AdvanTexfl-AX Treatment System provides consistent, reliable wastewater treatment, even during "peak flow" conditions. The AdvanTexTm-AX Treatment System includes a processing tank and a control panel with a programmable dosing timer. So it discharges small amounts of treated wastewater, regularly, throughout the day. AdvanTexTM-AX treats waste to better than "secondary" standards. Effluent can be used for drip or subsurface irrigation, or discharged to shallow, inconspicuous trenches. It can also be discharged to fine-grained polishing filters for coliform removal and water reuse. System Benefits Significantly smaller land area is required for the AdvanTexTM-AX Treatment System than is required for sand and gravel filters. That's because textile has demonstrated the capacity to support microbial populations that can treat filtered processing tank effluent at greater hydraulic loading rates. In fact, loading rates for AdvanTexTM-AX Treatment Systems are typically 5-20 times higher than for sand filters. In addition, textile is lightweight (z4.5 lbsl»), making it ideal for prepackaging and shipping, which simplifies installation and reduces costs. Applications The AdvanTexTm-AX Treatment System is ideal for .. . • New construction • System upgrades and repairs • Pretreatment of moderately high-strength waste • Wherever typical secondary treatment standards suffice (min. 25 BOD/30 TSS) System Operation and Maintenance Like any advanced technology, the AdvanTexTM-AX Treatment System should be serviced regularly. AdvanTexTM is easy to service, easy to clean, and generates virtually no trouble- some activated sludge. Orenco Systems, Inc. provides a comprehensive, two-year warranty on all components. The AdvanTexntAX Treatment System comes with an audible alarm to sipryl mainte- nance or high water conditions. And it's sized to allow for a minimum of 24 hours of wastewater storage (at average daily flows). That means an operator can provide service to the system during normal working hours, regardless of when the alarm occurs. os� OntneeSysteme Incapcatied 1-8W-398-9843 TP -Ax -1 Ret 4.1013/00 AdvanTet' AX Filters Overview, cont The AdvanTexTM-AX System's pumps typically run just 90 minutes per day, so AdvanTexTM-AX uses very little power ... an average of $4 per month (based on the national average of eight cents per kilo- watt hour). Compare that to power costs of up to $20-$60 per month for many "activated sludge" aero- bic treatment units. Treatment Methodology The AdvanTexTM-AX Treatment System works just like a recirculating sand filter: a reliable, proven technology that Orenco's engineers have helped to perfect over the past 20 years. While the treatment process is the came, the treatment media is more efficient. In an AdvanTexTM-AX Treatment System, wastewater percolates both through and between the textile media, whose complex fiber structure offers an extremely large surface area for biomass attachment (20,000 sq. ft. for model AX10). In terms of treatment, a key factor is the water -holding capacity (field moisture capacity) of the textile material. A visible biological film normally develops on the filter medium within a few days. BODS and TSS reductions occur almost immediately. Design Criteria The AdvanTexTM-AX (model AX10) uses a 1,500 gallon processing tank. The System is capable of treating 450 gallons of residential strength effluent that meets the following parameters: Inlet — Riser/Lid vsswoorswisik Pump Package/ with Recire.( Spl'aterVatre - Inlet (bolding sewer) Primary Chamber Secondary Chambe Discharge Filtrate Based on typical average daily flows (e.g., 50 gpcd). Residential peak weekly average flows are typically 2 times normal average daily flows (i.e., Qpwa= 2Qa. Peak weekly average flows meet typical regulations govem- ing gpd-to-bedroom ratios) Typical average residential processing tank effluent characteristics with an efflu- ent filter. BOD = 130 mg/L, TSS =40mg/L,TN=65 mg/L,O&G=20mg/L Side View of a Typical AdvanTexTM-AX Treatment System. Final effluent quality will vary depending on influent waste strength. For commercial systems, please contact Orenco's Application Engineering Department. TP -AX -1 Rev. 4.1 vtg Adva nTex -AX Fi Ite r Residential Technical Data Sheet Applications Orenco's AdvanTexTM-AX Treatment System is an innovative tech- nology for onsite treatment of residential wastewater. The heart of the System is the AdvanTexlm-AX Fitter, a sturdy, watertight fiber- glass basin filled with an engineered textile material. This light- weight, highly absorbent textile material treats a tremendous amount of wastewater in a small space. The AdvanTexT"-AX Treatment System is ideal for: • Small sites • System upgrades and repairs • New construction • Poor soils • Nitrogen reduction • Price -sensitive markets • Pretreatment For sizing, see 'Design Criteria; EDA -ATX -2. The heart of the AdvanTex'"-AX Treatment System is this sturdy, watertight fiberglass basin filled with an engineered textile material. #7‘4,f CEN Orem* Systems' Incorporated C6.+giythe Vivi% R6r[Qe" We' Wwwa tli•ApR Features/Unique Specifications To specify this product, require the following: • Wastewater treatment to better than "Secondary" Treatment Standards • Consistent treatment, even during peak flows • Timer operation for flow monitoring, flow modulation, and surge control • Fixed film textile media (a polyester plastic), operated in an unsaturated condition • Consistent media quality • Low maintenance beyond annual servicing • Low energy consumption (under $5/month power cost at national average electric rate of $OB kWh) • Complete pre -manufactured package, ready -to -install • Watertight construction, corrosion -proof materials, tamper- proof lid bolts • Optional anti -flotation flanges • Quiet operation Standard Models Ax1o, AX2o Physical Specifications Approximate Dimensions* AX10 AX20 Filter Basin Length 4ft 7.5ft Width 2.5ft 3ft Height 2.5ft 2.5ft Area (footprint) Filter Dry Weight 10sq.ft 20sq.ft 150lbs. 3(0 lbs. "See AdvanTex'" Treatment System drawings for exact dimensions A1a-ATX-AX-1 Rev. 13 C 5m1 Design CriteriaOno= interns* AdvanTexTM Treatment Systems for Residential Applications System Selection The AX Series of the AdvanTexTM Treatment System treats residential strength wastewater to better than "secondary" standards. The treatment system can be configured in two Modes. Mode 1 recirculates only through the second compartment of the Processing Tank. Mode 3 recirculates through the entire tank for maximum nitrogen reduction. The fmal discharged effluent can be either "Filtrate Discharge" or "Blend Discharge." Refer to AdvanTexTM Treatment System drawings for further details on Mode and dis- charge options. To help select the Mode best suited for your application, use the following chart and treatment criteria: Table 1. Typical Effluent Quality AdvanTexTM Mode $OD (mg/L) TSS (mg/L) AX -Mode 1* Filtrate Discharge - Residential 15 15 Blend Discharge - Residential 20-40 20-30 AX -Mode 3* Filtrate Discharge - Residential 15 15 Blend Discharge - Residential 30-45 20-40 * These numbers are conservative expectations of system performance based on typical flow rates, recirc ratios between 3 1/2:1 and 5:1, and the average waste strength described further in this document 111101, Ca incorpoted 1-800-348-9843 AdvanTeirm .800-3 8- Nitrogen reduction in Mode 1 will typically exceed 50 percent, with total nitrogen in the filtrate ranging between 25 and 35 mg/L±. In Mode 3, nitrogen reduction can reach 85 percent or better, depending on wastewater strength and other characteristics like grease and oils, pH, and alkalinity concentrations. Nitrification can be inhibited if the buffering capacity (alkalinity) of the wastewater is too low. On a theoretical basis, 7.14 mg/L of alkalinity as CaCO3 is needed to nitrify 1 mg/L of NH4+. Performance will vary with loading rates. By lowering the typical design loading rate shown in Table 3, discharge characteristics of 10/10 may be achieved. System Operation: Description of Treatment Process Raw sewage enters the two-compartment Processing Tank through its inlet tee. lin the first compartment, the raw sewage separates into three distinct zones: a scum layer, a sludge layer, and a clear layer. A flow-through port(s) in the Tank's baffle wall allows effluent from the clear layer to flow into the second compartment of the tank The Biotubem Pump Package, in the second compartment, pumps filtered effluent to a distribution manifold in the AdvanTexTM Filter. Effluent percolates down through the textile media and is collected EDA -ATX -2 aw.23 m 7/1 1 Page 1 Design Criteria, cont in the bottom of the filter pod. The treated effluent flows out of the filter pod through the Filtrate Retum Line that returns the treated effluent to the Recirculating Splitter Valve (RSV). The RSV auto- matically splits or diverts the flow between the Processing Tank and the final discharge. The RSV also controls the liquid level within the Processing Tank. During extended periods of no flow, 100% of the treated effluent is retumed to the Processing Tank. The residential AX Series filters have a passive vent system and do not require the use of a fan. Filter Sizing The AX Series textile filter is currently available in two sizes. Model AX 10 is designed to handle resi- dential waste for homes up to three bedrooms with a design flow of up to 450 gallons per day per Table 3. Model AX20 is designed to handle larger homes and commercial systems with a peak design flow of up to 900 gallons per day per single AX20. Residential waste must meet the criteria in the "Residential Strength Wastewater" table, below. A four-bedroom home requires two AX10 pods or one AX20. Consult Orenco or an authorized Dealer for larger system designs. Table 2. Residential Strength Wastewater (Influent Characteristics) Characteristic Average Weekly Peak Rarely Exceed( mg/L mg/L mg/L BOD 150 200 300 TSS 40 60 150 TKN-n 65 75 150 G&O 20 25 25 Maximum allowable wastewater strength pumped to an AdvanTex7A1 Treatment System is "Residential Strength Wastewater." Residential strength wastewater is defined as primary sewage effluent from a septic tank that does not exceed the above parameters. Processing Tank Requirements Homes up to four bedrooms require a minimum two-compartment, 1500 gallon tank with minimum 12 - square -inch flow-through port(s) at 60-70% of the lowest normal liquid level (see "Typical Liquid Level Positions" drawing). The first compartment should have a minimum 1000 gallon volume. In larger residential systems, the fust compartment should be sized at approximately 2/3 to 3/4 of the total processing tank volume. All tanks must meet minimum structural requirements and be completely watertight, including the riser/tank connection. See structural and watertightness criteria in Orenco's "General Specifications," document NDA -DG -SPEC -1, for detailed recommended specifications. Recommended Tankage and Filter Units The following chart summarizes the recommended tankage and number of textile filter units based on the number of bedrooms in the home. Recommendations are based on typical average daily flows of 50 gpcd. (The typical range is 40-60 gpcd.) Recommendations also assume that residential peak weekly average flows are typically two times nor- mal average daily flows (i.e., Qpwa = 2Qa) and peak weekly average flows meet typical regulations governing gpd-to-bedroom ratios. mA Afl-2 Rev. 2.3 m 7n9111 Page 2 Design Criteria, cont Table 3. Recommended Tankage and Filter Units Bedrooms Occupants* Max. Peak Max. Average Processing Tank** AX Units maximum maximum gpd gpd minimum size (gals.) models 3 4 450 225 1500 AX10 4 8 900 450 1500 AX20 5 10 1200 600 2000 AX10+AX20 6 12 1400 700 3000 Two-AX20 *Systems with occupancies greater than the maximums shown or greater than eight occupants require a design with multiple units based on a minimum of 2.5 if of surface loading area per capita. "*In Mode 3 designs for cluster and commercial systems, the primary compartment also becomes a recirc compartment Consequently, the processing tank capacity should be increased by at least a factor of two. Call Orenco for assistance. Design Loading Rates Orenco's suggested design loading rates are based on typical per capita flow rates and average strength characteristics expected from residential type installations, as shown above. Performance (i.e., filter siz- ing) is a function of the expected typical loads with periodic weekly highs. (Typically, the daily mass loading is based on the expected daily flows and parameter strength.) The void capacity, surface area per unit volume, and moisture -holding capacity of textile are many times greater than that of sands or gravels, thereby enabling equal treatment at higher loading rates. If the load- ing rate (or mass load) needs to be reduced to meet discharge limits, it's a simple matter of adding addi- tional modular units. Operationally, the module's flexible and easily serviceable features make AdvanTexTM units an ideal, efficient, and effective solution for all wastewater treatment applications with domestic waste characteristics. For residential, cluster, and commercial applications in which wastewater strengths exceed the average (because of low water use, special cooking or food processing practices, or other special circumstances), system sizing can be made proportionate based on the actual or expected mass loads vs. typical mass loads. AdvanTexTM is an excellent treatment system for commercial applications. Call Orenco's Systems Engineering Department for information on commercial applications. Pumping Equipment Pumping equipment shall be an Orenco Biotubem pump package. Timer Settings and Recirculation Ratios The operation of the pump in the second compartment is controlled by a programmable timer in the con- trol panel, which allows the pump to dose the filter for short periods (usually less than a minute), from a minimum of 72 to a maximum of 300 times a day. This frequent "micro -dosing," which optimizes the treatment process, occurs 24 hours a day to maintain the proper biological environment. At startup, the timer should be set to achieve a 4 to 1 recirculation ratio, based on the expected actual average daily flow. Depending on the system's performance and measured actual flow, the recirculation ratio can be adjusted. EDA -ATX -2 Rat 33OD 7/19/01 Pape 3 t D k 1 2 1 v It Typical Liquid Level Positions for Residential AdvanTex'" Treatment System with MVP Control Panel I[S Polem 34IIA99 and S,490.5MI A439423 and MOS gWW Manu{NMwY 0199e Deco Systeme ha Dewed By: B Draw Br Cott,lettM Tao: Ty ices LOW Level Positions ler Residential Meanie? Treatment System wee WP Cann' Panel Wooed ON Dmeine: 1 OF 1 DISK: No. Date Approved: Re eioo pate NR/00 Scale: r.r-r Orerco Systems. twine I. ma o= CD as K EA a o Ca la CO)po owe. 3 U.S. Potents 5,480,561 4,439,323 and 5,492,635 Other Potents Pending ®2001 Orenco Systems® Inc. Design By: EN6PEEILK Drawn By. Cmss Jarov# rue: ADVANTEX' - AX!O MODE 3A Approved By: Drawing: Drawing No. Dote Approved: Revision: Dote: 7/2/01 Scale: I'=4' _,_f CISI Orenco Systems® Yleclwoneed Design Criteria, cont AdvanTexTm Control System Critical to the success of the AdvanTex Treatment System is the method in which the effluent is loaded onto the AdvanTex Textile Filter. Timer controlled applications have proven over the past three decades to play an essential role in optimization of the performance of both fixed and suspended growth biological systems. A timer -controlled pump in the processing tank periodically doses effluent to a distribution system on top of the AdvanTex Filter. Each time the filter is dosed, effluent percolates through the filter media and is treated by naturally -occurring microorganisms that populate the filter. During periods of high flow, a timer o*erride float will temporarily modify the tinier settings to process the additional flow. Conversely, during periods of low flow, the timer settings can be modified to reduce loading onto the AdvanTex filter. VeriComm remote telemetry control panels and web -based monitoring system are recommended but not required for all AdvanTex Treatment Systems. VeriComm gives wastewater system operators and maintenance organizations the ability to monitor and control each individual system's performance remotely. There are several additional operational benefits associated with telemetry -based controls, including Advanced Control Logic — functions that activate in the event of component malfunction to diagnose the system using pre -established trend data and, if necessary, modify the operation of the sys- tem until it can be serviced. VeriComm also provides additional alert and alarm functions to notify the operator in the event that trend data indicate potential problem conditions (e.g. high flows). Surge Volume For most residential applications, the recommended surge volume is approximately 150 to 250 gallons. The actual surge volume used should be approximately 50 to 100% of the actual average daily flow. The surge volume is the volume between the normal low liquid level and the high water alarm float. The normal low liquid level is the level at which 100% of the filtrate returns to the tank. For most res- idential installations, the low liquid level will be approximately 5 to 6 inches below the top of the RSV Cage. See the "Typical Liquid Level Positions" drawing for description of typical RSV and float set- tings for residential systems installed in two-compartment tanks. Cold Weather Considerations Both the AX10 and AX20 are available with two inches of insulation attached to the bottom of the lid. Installing insulation around the sides of the filter pods themselves is optional and is done onsite as needed. Other cold weather considerations include standard practices used with most onsite pump systems, such as allowing all lines to drain, insulating processing tank lids, and backfilling risers with pea gravel if frost -heave is a concern. Consult Orenco if supplementary options need to be considered. EUA -AT% -2 Rev. 2.3 m 7/19101 Page 4 abo)lood dwnd #gnMoig Huol ivawpodwo3 z laUu xaIuonpy U.S. Patents 5,480,561 4,439,323 and 5,492,635 Other Patents Pending ©2001 Orenco Systems® Inc. Design Br. gamma Drawn By: CHRIS AMR Title: ADVANTEXM AX20 MODE JA Approved By: Drawing: Drawing No. Date Approved: Revision: Dote: 7/7/IN Scale: t': 4' CISta 031 Ore=co Systems® OPERATION & MAINTENANCE MANUAL AdvanText" Treatment Systems ADVANTEX'" O43jJI MANUAL Introduction Your Expertise Matters As the operator and service provider of an onsite wastewater treatment system, you play a crucial role. Property owners, neighbors, regulators, deal- ers, manufacturers ... all rely on your efficient and effective work. All onsite systems require servicing, from the sim- plest of standard stone -trench systems to the most complex tertiary treatment systems. Regular serv- icing optimizes the treatment process and ensures that onsite systems are a sustainable technology. To make servicing easier, Orenco has configured the AdvanTex'" Treatment System and its compo- nents to be one of the most trouble-free and serv- ice -friendly residential treatment systems on the market We've also provided this O&M Manual In it, you'll find valuable information about ... • The AdvanTeC System's configuration and treatment process • Performance expectations (norms) at each stage in the treatment process • System components • Routine cleaning and maintenance procedures and frequencies • Routine cleaning and maintenance checklist • Testing procedures • Troubleshooting tips • Sample documentation • Equipment and tools checklist Operation and maintenance of an onsite treat- ment system requires an understanding of all the above information. So please read through this entire manual first, before providing any service. Then write in the Record of System Facts, on the back page. Reading the manual fust and maintaining up-to-date records will save everyone time and money in the long -run. Also, at start-up and periodically thereafter, we recommend that you get together with the sys- tem user to review the Homeowner's Manual that comes with the system, especially the "Do's and Don'ts." This will educate the user on preventive maintenance and will also allow you to track any significant changes (e.g., number of occupants, changes in water use, use of detergents, disposal of cleaning compounds, etc). We're very proud of the AdvanTex"' Treatment System. Like all our products, it has gone through extensive research, development, and field-testing. Then each component is built to written specifications and subjected to quality review, before shipping. If any component of this System does not meet your expectations, please call your authorized AdvanTef Dealer. ADVANTEC 03c11J1 MANUAL AdvanTex s Treatment Systems Table of Contents Typical System Configuration 4 Treatment Process and Performance Expectations 6 • Processing Tank • AdvanTex" Textile Filter typical Materials List 8 Routine Cleaning and Maintenance Procedures 10 • Control PaneVPumps/Alarms • Pumping System • Processing Tank • Textile Filter • Miscellaneous • Documentation • Maintenance Checklist Effluent Testing Procedures • Protocol for Sampling, Testing, and Analysis • Routine Tests, Frequencies, and Typical Values • Supplemental Testing and Typical Values Troubleshooting Tips for Operators: Process Treatment • Troubleshooting Effluent Quality • Troubleshooting Odor • Troubleshooting Effluent Filter Clogging • Troubleshooting Oily Film • Troubleshooting Foam O&M for Nitrogen Reduction • The Process • Signs of Effective Nitrogen Reduction • Troubleshooting Nitrogen Reduction 16 18 20 Tools, Equipment, and Spare Parts List 22 Maintenance Checklist and Feld Report Forms 23 Appendix: The Nitrogen Reduction Process and Key Indicators 28 Abbreviations 30 Notes 31 Record of System Facts Back Page Copyright Oroneo Systeme, Inc. Property of Orenco Systeme, Inc. Do not reproduce or distribute without written authorization from Orenco: 1-800.348-9843. 3 4 ADVANTEr O&M MANUAL Typical System Configuration: 3D View, AX Series Filter This 3D illustration shows a typing back -yard configuration for the key elements of an AdvanTex" Treatment System, using an AX series" textile filter. While the RX" series tatikfilter pod is three times larger, it can still be positioned on top of the processing tank AX stands far Aligned Textile (hanging style). " RX standsfor Random Textile (chip style). ADVANTEC O&M MANUAL Typical System Configuration: Top View 1. Wastewater 2. Watertight processing tank Provides primary treatment. Removes a majority of contaminants (see next page). 5. Final dispersal (shallow graveness drainfield, STEP collection, drip system, shrub irrigation, water reuse, lagoon, wetland, etc.) 3. AdvanTex' textile filter Provides secondary treatment. Removes up to 95x% of remaining contaminants (after primary treatment). ►= 4. Additional filter (only if necessary) Provides final polishing. Removes additional coliform or nutrients, as necessary. 5 ADVANTEr O&M MANUAL Treatment Process and Performance Expectations: Processing Tank Processing Tank The processing tank provides primary wastewater treatment. The tank is an enclosed, watertight receptade designed to collect wastewater, segre- gate settleable and floe/able solids (sludge and scum); accumulate, consolidate, and store solids; digest organic matter, and discharge treated effluent. BOD (biochemical oxygen demand) removals of greater than 65% and TSS (total suspended solids) removals of greater than 70% are racily accomplished. The tank operates as a plug -flow type of reactor (fluid and partides enter and exit the tank in pro- gressive sequence). Wastewater separates into three distinct layers: a floating scum layer, a bottom sludge layer, and a clear zone in between, which is relatively free of large solids. A pump vault with effluent filter located at the outlet end of the tank draws liquid effluent from the clear zone, and the filtered effluent is dosed to the next step in the treatment process ... the AdvanTez Textile Filter. Because the AdvanTex"' Treatment System oper- ates in the recirculating mode, the filtrate from the Textile Filter returns to the processing rank in one of two ways: to the back of the tank in Mode 1 and to the front of the tank in Mode 3. This plumbing configuration affects effluent quality. Effluent quality is also contingent upon a number of other conditions inside the tank: • strength and characteristics of incoming waste (see `Raw Influent," below) • average flows within design range (typically 40-60 gallons per person per day) • adequate long-term solids retention for thorough digestion • watertightness of tank (for proper stratification of incoming waste) • proper size of tank (for minimum 24-hour hydraulic retention time through the tank's dear zone at average flow rates and when sludge and scum are developed fully) If the above conditions are met, you can expect the following treatment performance from the processing tank Performance Expectations: Processing Tank BOD, TSS TN mg/L mg/L mg/L Raw Influent* 450 500 70 Sento Tank Screened Effluent 130 30 68 Processing Tank Retire/Blend Eft. -Mode t" 20 20 30 Processing Tank Rechc/Blend Eff: Mode 3" 30 20 15 'Source: Crites d Tchobanoglow. Smallsad Decentralized Wastewater Masrapement Systems p. 183. 1998. McGraw-Hill **Will vary with retire ratios. The numbers here repraent a opiate 5:1 recirc ratio. ADVANTEX" O3I1JI MANUAL Treatment Process and Performance Expectations: AdvanTexTM Textile Filter AX Series AdvanTex' Textile Filter The AdvanTexm textile filter provides secondary wastewater treatment. The filter is a sturdy, watertight fiberglass basin filled with an engi- neered textile material. This lightweight, highly absorbent textile material treats a tremendous amount of wastewater in a small space. The AdvanTef filter operates in the recirculat- ing mode, just like a recirculating sand or gravel filter, but loading rates are typically 5-20 times higher, for a number of reasons. For one thing, the textile media has a very large surface area— about 5 times greater than that of an equivalent volume of sand. Textile also has a greater void volume (for free-flow of oxygen) and greater water -holding capacity. Wastewater percolates both through and between the textile media. A visible biological film nor- mally develops on the filter medium within a few days. BOD, and TSS reductions occur almost immediately. Within the filter, aerobic conditions exist that are ideal for microbes that convert ammonia to nitrate (nitrification). Other conditions exist, too, that result in further nitrogen reduction within the media. Some AdvanTexm filters are config- ured (Mode 3) so that the filtrate rearculates back to the high -carbon, low -oxygen environ- ment of the processing tank, which is ideal for RX Series microbes that reduce nitrates to nitrogen gas (denitrification). Harmless nitrogen gas is then released freely back into the atmosphere. The acclimation period for nitrification may range from four to eight weeks, or longer in colder climates. AdvanTex filtrate effluent quality is dependent upon proper management of the recirclblend effluent flowing into the filter (which, in turn, is dependent on the conditions described on the previous page). If proper conditions are met, and with typical average daily flows of 40-60 gallons per capita per day, you can expect the following treatment performance (by Mode): Performance Expectations:* AdvanTex" Textile Filler so0. marl Tss TN mgA. mg&L AX filtrate (Mods 1) 15 15 25 AX filtrate (Mode 3) 15 15 10 RX filtrate (Mods 1) 10 10 10 - 30 RX filtrate (Mode 3) 10 10 10 'Perfonnance expectations are bared on typical average influent chamcteristiu and hydraulic loading uta. Performance and servicing frequencies will and m vary relative to the mass load being treated Procedures for mating excessively high loads will require engineering review. For more information, please review AdvanTex'" Design Criteria. 7 8 ADVANTEX" O&M MANUAL Typical Materials List AX Series Inlet+ Orenco's AdvanTexm--AX Treatment Systems come in a variety of models and configurations. Following is a typical materials list (excluding the processing tank) for an AX series system that requires a recirculating splitter valve (RSV2Q) and a pump basin (some do not). Processing Tank Access Equipment Two Access Risers nKnsary: One 24" dia., w/Lid One 30" dia., w/Lid & necessary Grommets Treatment System Equipment PVC Splice Box Simplex Biotube Pump Vault Discharge Assembly Float Switch Assembly Orenco Pump, 1/3 hp, 115V with up to 5 year warranty MVP AdvanTex'" AXB Panel, 115V Recirculating Splitter Valve Assembly AdvanTee AXI 0 Filter went Assembly Pump Basin Equipment PVC Pump Basin, 24" dia., w/Lid PVC Splice Box Discharge Assembly Float Switch Assembly Orenco Pump, 1/2 hp, 115V, with up to 5 year warranty ADVANTEX'" O&M MANUAL Typical Materials List RX Series AdnsT,CRDer rr—Q11 Anal configuration May Lala Air Idet[mm Fa Orenco's AdvanTex"-RX Treatment Systems come in a variety of models and configurations. Following is a typical materials list (excluding the processing tank) for an RX series system that requires a recirculating splitter valve (RSV2Q) and a pump basin (some do not). Processing Tank Equipment Two Access Risers nernr, ry: One 24" dia., w/Lid One 30" dia., w/Lid & necessary Grommets Treatment System Equipment PVC Splice Box Simplex Biotube Pump Vault Discharge Assembly Float Switch Assembly Orenco Pump, 1/3 hp, 115V, with up to 5 year warranty MW AdvanTexl" RXB Panel, 115V Recirculating Splitter Valve Assembly AdvanTexm RX30 Filter wNentilation Fan Assembly Or—bigamy Pimp Dads Mims Ram 1.1m FBaWTDia. TakOpening Mh marnnwee) Mishap RIuete Pump Basin Equipment PVC Pump Basin, 24" dia, w/Lid PVC Splice Box Discharge Assembly Float Switch Assembly Oren Pump, 1/2 hp, 115V, with up to 5 year warranty 9 10 ADVANTEX" 08z1111 MANUAL Routine Cleaning & Maintenance Procedures Orenco Systems' requires regular inspection and maintenance of AdvanTez Treatment Systems as a condition of purchase. All activities are to be performed three (3) months after start-up and then every 12 months thereafter, or more frequendy, if necessary. In most of North America, spring is the best time for annual visits. Following is a list of die routine leaning and maintenance procedures we recommend or require. Failure to provide required maintenance will void the AdvanTexl" Treatment System warranty. Copies of inspection and maintenance reports, along with any additional documentation, must be forwarded to and retained by the Authorized AdvanTex Treatment System Dealer who sold the system. If there is no Dealer, then the docu- mentation must be forwarded to Orenco Systems, Inc., 814 Airway Avenue, Suthedin, OR 97479, ATTN: Systems Engineering. Control PaneVPumps/Alarms WARNING: Only qualified/certified electri- cians or service providers should perform main- tenance on electrical equipment 1 Check pump operations. Place the MOA switch to Manual and make sure the pump runs. Then switch back to Automatic and continue to check the automatic operation of the alarm floats, the recite timer on the floats, the discharge timer on/off, and timer overrides. Refer to the installation, operation, and setting instructions for the control panel that comes with the system. A set of instructions is stored in a plastic pocket on the inside of the panel door. 2 Record motor run amps and voltages on the Field Maintenance Report Form. If the voltage drop exceeds National Electric Code (NEC) requirements, have an electrician verify the service line and check pump windings. 3 Verify that the programmable timer settings for all pumps are correct. If the timer settings have been changed, the current setting and date of change should be written on your Tuner Setting Instructions and Record of System Facts, at the back of this Manual. Place the date and your initials by the recorded change. e ADVANTEr O&M MANUAL 4 If the control panel has an elapsed time meter (ETM) and/or a cycle counter (CT), read and record these values on the Field Maintenance Report Form. ETM's and CT's are valuable troubleshooting tools if problems occur with the system. ETM and CT data signal high water usage, low water usage or tank leakage, and excessive pumping, among other operating situations. 5 Confirm operation of audible and visual alarms per the installation, operation, and setting instructions for the control panel that comes with the system. Pumping System Pump systems should be inspected annually to ensure that they are operating properly. Unscrew the stainless steel bolts that fasten the fiberglass lid over the pumping equipment. Remove die fiberglass lid for an inspection that includes these steps: 1 Verify that there are no obvious holes or 'talcs in the riser or around the perimeter of the riser connection to the tank. Wetness or water marks may be an indication of weeping. 2 Inspect splice box to ensure lid and connec- tions are secure. 3 Verify that floats are in good condition and properly secured to the float tree. Verify that float cords are neatly wrapped inside the riser so that they cannot interfere with the operation of the floats. 4 Verify float operation. With MOA switch in Automatic, simulate system operation by lifting the floats in die same order that the liquid would lift them (bottom first, top last). 5 Determine whether the Biotube° effluent filter needs leaning by testing the change in the tank's liquid level when the pump is on. Turn the recirc pump on by flipping the MOA switch in the control panel to Manual. Watch the liquid level inside the screened vault as the pump is running for about 30 seconds to deter- mine if there is any noticeable liquid level differential between it and the tank liquid level. Return the MOA switch to Auto. When the liquid level difference between the inside and outside of the vauk is about two inches or more, or if the low-level alarm is activated, the Biotube° cartridge may need to be leaned. 11 12 ADVANTEX' O&M MANUAL If the Biotube° needs deaning, do the following: • Turn circuit breaker off at service panel • Switch MOA and circuit breakers in control panel to "Off • Slide cartridge out ofvauk • If nernary, the RSV2Q valve may be removed to allow room in the riser for cleaning the Biotube° — Pull RSV2Q out of its Quick Disconnect holster (see photo next page) and place it in a plastic trash can — Hose off the trash can into the tank after replacing the RSV2Q • Hold Biotube cartridge over open inlet of tank or primary compartment • Carefully spray build-up into tank • If there ate significant solids in vault, remove and dean it too 6 Pull the pump and place it on a cleanable surface, like the riser lid. Check the intake screen; wash off particles as nernsary. Record the kinds of particles (cigarette butts, hair, lint, gum, kitty litter, cloth wipes, grease build-up, etc.) on the Field Maintenance Report form. Report findings to user (for education). 7 Visually inspect the Recirculating Splitter Valve and verify that the liquid level in the tank is within the normal range. If low, the ball mech- anism could be jammed. Remove, disassemble, and inspect. If high, the RSV2Q may require cleaning. Remove, disassemble, and inspect. Processing Tank 1 If possible, verify no inlet flow when all house- hold appliances are turned off. Access the inlet inspection port for visual verification of lack of flow. If the inlet inspection port is not readily accessible, then listen for trickling water at the access port. This could indicate faulty fixtures or leaky plumbing. Check building sewer deanout for flow. ADVANTEX'" O&M MANUAL If faulty plumbing isn't the problem, the sound of Melding water could indicate I & I (infiltration and inflow). In that case, further investigation is necessary. 2 Inspect the processing tank for the following: • Liquid depth (should be about 60-7036 of the total inside depth of the tank) • Odor (should be musty, not pungent) • Color/consistency of scum (should be dark brown with a consistency that varies from dense and crusty to soft and amorphous) • Effluent characteristic (should be no oily sheen or foam) • Sludge and scup thickness (records should indi- cate typical growth accumulation of 1" of scum and 2" of sludge per year for 3-4 occupants) Textile Filter 1 Inspect for ponding.* The filter should not be saturated. Effluent should move freely through the media 2 While manifold is pressurized, check for prop- er positioning of orifice shields over each orifice. `Ifthere is ponding in the textikfiber because ofa build- up ofoil and rase, scrape a sample ofthe biomat and have k analyzed by an environmental lab w determine its characteristic. For the AX Series fiber only: Iftere is ponding ofindeanninate cause, coupled with a pungent odor, it may be necessary to dean the teztik matt (Excessive cleaning will retard nitrification. 04 clean as often a necessary) The wade media hangs in individual sheets, and that sheets can be pulled outfor cleaning (if necessary). Fast remove the Reciwuladng Splitter Valve. Measurements of solids accumulation help to determine when the septic tank needs pumping. A recommendation for pumping should be made when the bottom of the scum layer is within 3" of the flow-through port of the baffle or when there is an accumulation of sludge to a depth within 6" below the flow-through port. After the first year's measurement of septic tank sludge and scum thickness, measurements only need to be taken about every three years, until the thickness- es approach their maximum depths. Use a hose or pressure washer, connected to the nearest spigot Wash the biomat into the underdrain and it will flow back to the tank, as longs the Recirculating Splitter Valve has been removed When done, replace RSV. Remember dean filter only if ponding and odor occur. 13 ADVANTEX' 03c11J1 3 Verify that there is equal spray on and under all orifice shields. (Each orifice shield should show signs of organic biomat build-up on and underneath it) 4 Check for dogged orifices (orifice shields with- out spray or biomat build-up underneath). You should be able to observe uniform water droplets dancing around orifice shields while dosing. 5 Assess the character and color of the biomat. If it seems appropriate, take a photo and comment on the growth and characteristics of the biologi- cal mat under and around the orifice shields. Biomats are natural and normally appear light - brown to dark -brown and gelatinous in texture. If the mat appears too light (yellowish with the texture of lard, wax, or margarine), the grease and oil concentrations should be checked. 6 Check the odor emitting from the filter. If a strong or offensive odor (e.g., smell of rotten eggs, rotten cabbage, etc.) is emitted, measure the DO level in the filtrate and recirculation cham- ber and adjust the recite time, if necett+ry. (Normally, systems will smell musty, earthy, or moldy but not pungent). MANUAL 7 Check squirt height and compare residual pressure against the start-up value. If the squirt height is 40-50% higher than the start-up value, clean and flush the manifold. (A 50% increase in squirt height signals approximate- ly 18% orifice blockage.) To flush laterals you can run the pump or use a bottle brush or pressure washer. Brushing or pressure washing is best. NalingeSedealai Flushing with pump Flushing with pressure washer or bottle brush (When flushing AX laterals, biosolids slough into the bottom of the filter, then return to the tank.) Verify again that all orifices are dear. Re -check squirt height. 8 For the RX Series filter only, verify ventilation fan operation and air flow. Use an anemometer (available through Orenco) to measure the air flowing through the system. 10-15 cubic feet per minute (cfm) per pod is typical. Record inlet flow and outlet Sow, where applicable, to ensure there isn't a large difference between them. A large difference means that leaking or bypassing is occurring. Clean as necessary. ADVANTEC O3jlJI MANUAL Miscellaneous 1 Exercise all mechanical valves. Fully open and close valves to ensure they have not failed or become stuck in one position. 2 Before leaving the site... a) Review the Maintenance Checklist that follows to ensure all activities have been performed. b) Be particularly careful to ensure the following. — valves are back in their recommended positions — control panel has been set back to automatic and circuit breakers have all been switched back on — household water lines have been turned back on (if they were turned off earlier in the visit for 1 and I evaluation) — lids and lid bolts are properly in place and tightened Documentation 1 Complete all documentation and submit any required reports to the appropriate parties/ agencies. Be sure to send a copy to the AdvanTexm Dealer. CAUTIONI While providing O&M services, be sure to use proper personal protection equip- ment, such as rubber gloves and clothing, to cover parts of the body that will be exposed to wastewater or effluent. 15 • ADVANTEC O&M MANUAL Tools, Equipment, and Spare Parts List Many of the recommended maintenance and troubleshooting procedures require specialized tools, equipment, and spare parts. At a mini- mum, we recommend you keep the following items on hand: Tools and Equipment anemometer (call for information) beakers or bottles camera (preferably digital) calculator channel lock pliers -6" and 12" gimping tool -10 to 22 AWG drill (cordless with spare batteries, charger) drill bit set -1/16" to 1/2" electrical tester (voltage and amperage) extension cord flashlight funnel hacksaw hammer heat gun (torch) hole saw (vari-bks: 3/4" and 1-3/8") hose with nozzle pencil Mirror on a Sdck (available from Prototek) pressure gauge (0 to 100 psi, 0 to 200 psi) back -pack pressure washer (portable) screwdriver set (straight blade and phillips) shovel SMOG device SMUG device snake (building sewer) squirt -height gauge stir sticks tape measure watch or stopwatch wire strippers wrench (24" pipe wrench) wrench (lid bolt) 30 gal. garbage can 30 gal. garbage bags Spare Parts control panel parts: — breakers — contactors — elapsed time meters — event counters fuses epoxy floats heat shrink tubing insulated butt connectors king connectors lid bolts PVC fitting (3/4" to 2") PVC glue/primer PVC pipe (3/4" to 2") wire nuts Hygiene and Clean -Up bleach/water solution hand cleanser paper towels protective clothing rubber gloves towels and rags Miscellaneous Patience and good humor! Maintenance Checklist AdvanTex"Treatment Systems While regional regulations may vary, Orenco Systems requires that the following inspection and maintenance activities be performed, by a qualified provider, on all AdvanTexT" Treatment Systems sold. Inspect initially Wee months following start-up and then at twelve-month intervals, or as necessary. Copies of Inspection and maintenance reports and additional comments/documentation are to be forwarded to the AdvanTex Dealer, or if no Dealer, to Orenco Systems, 814 Airway Avenue, Sutherlin, OR 97479. Maintenance Activity Activity Check-Off/Notes A) Inspect ControVAlarm Panel 1) Check pump operations in manual mode 0 2) Check/record pump amperage and voltage 0 3) Check timer settings 0 4) Record elapsed time meter and counter readings (d applicable) 0 5) Confirm operation of audible and visual alarms 0 B) Inspect/test Pumping System 1) Verify no leaks in riser 0 2) Inspect splice box for moisture and secure connections 0 3) Verify condition of and correct operation of all floats 0 4) Verify neat wrap of float cords 0 5) Pull pump and clean intake screen If necessary ❑ 6) Visually inspect recirculating splitter valve and liquid level 0 C) Inspect Effluent Filters/Pump Screens 1) Clean as needed 0 2) Visually Inspect and comment on biomat growth 0 D) Inspect Processing Tank 1) Verify no Inlet flow 0 2) Inspect liquid depth, odor, scum color, effluent characteristics 0 3) Measure sludge and scum; recommend tank pumping, if necessary 0 E) Inspect AdvanTex*" Fitter 1) Inspect for ponding assass character and color of biomat 2) Check squirt height 3) Verify proper orifice position, equal spray under orifices, no clogged orifices 0 4) Check for odors; adjust recirculating time if necessary 0 5) Clean and flush manifold Of necessary) 0 6) Re -check squirt height 0 7) Inspect fan intake vent and clean as necessary (AdvanTexT"'-RX only) 0 F) Miscellaneous 1) Exercise all iron, metal, and mechanical valves 0 2) Retum valves, control panel to proper settings 0 3) Submit required documentation 0 23 (Record in Peng) Record of System Facts Property Address Dealer Name Property Owner Name(s) bealer Phone Property Owner Phone Property Owner E -Mail Start -Up Date Engineer Name Pngheer Phone Installer Name AdvanTex Model # Installer Phone Control Panel Model # Float Model #(s) Pump(s) Model #(s) Service Provider Name Service Provider Phone Pump(s) Design Specifications: Hegulatory Authority gpm gpm Pem1k # (d applicable) besign Flow Contact Name Tank(s) Size(s) Contact Phone Recirc Ratio (start-up) 'Ream Timer Settings Discharge Timer Settings (when applicable) initial Squirt Height bispersal Method Distributed by: AIM -OM -ATX Rev. 1.1, 4/01 0 Cresco Systeme Inc. A`I o Oren Systans• Incorporated Changing the Wal the WefdDoe Waw 1-800-348-9843 OPERATION AND PREVENTATIVE MAINTENANCE AGREEMENT Street Address: SAMPLE Legal Description: SCG Enterprises, Inc. will perform operation and maintenance services for the Onsite Wastewater System serving the subject site as outlined below: Processing Tank: During each visit, the scum and sludge layers in the processing tank (septic tank) will be measured. A recommendation for pumping will be made when the scum thickness exceeds four inches, or the sludge thickness exceeds 24 inches. Pumping System: During each visit the pump system will be observed to verify proper performance. The pump will be operated manually. The vault screen will be pulled and cleaned. Recirculating Filter: The filter will be observed for signs of excess organic build-up or improper performance. The media will be cleaned or replaced as necessary. Drain Field: The surface area around the drain field will be observed for signs of failure such as lush vegetation growth or effluent ponding. Liquid levels within the field will be observed through the observation pipe and levels recorded. Items that are not included in this contract include: 1. Corrective and/or repair maintenance if necessary, other than covered under warranty. 2. Effluent sampling and analysis if applicable. 3. The cost of tank pumping. The goal of SCG Enterprises, Inc. is to observe the operation, and perform maintenance for the onsite wastewater system to allow for proper, long term functioning of the system and compliance with the conditions of the installation permit. SCG Enterprises, Inc. will perform operation and maintenance of the system as outlined for $120.00 per visit with two visits per year ($240.00 per year). Payment in full for the first two years is required prior to initiation of the agreement. This agreement period will be for the 2 -year period between October 2000 and October 2002. Property owner or authorized representative Date SCG ENTERPRISES, INC. authorized representative Date Payment Received CDPFE-WOCD Fax:3037820390 Jul 3 2001 10:34 P.02 Bill Owens. Governor t Jane L rerun. &«utive Director • y b. Dedicated to protecting and improving the health and environment d the peopk o(Cobrado 4300 Cherry Creek Dr. 3. Laboratory and Radiation Son -ices Division Denver, Colorado 802464530 8100 Lowry 81vd. Rhone (303) 6923000 Denver, Colorado R02304928 TOO Line (3031691.7700 (3031692.3090• Colorado Jm,�e-p�t Located b Glendale, Colorado of Publicnotch ; • hapi/www.cdpbe.statetnus and Eirvironmern STATE OF COLORADO July 3, 2001 William Cagle Rusin' =Development Omtco Systeme incorporated 1114 Airway Moue Sutherliq OR 97479 Dear Mr. Cagle: On behalf of the Colorado Individual Sewage Disposal Systems Technical Advisory Committee (ISDS TAC) I would like to thank you for taking the time to make a presentation before the TAC on April 9, 2001 and answering questions from the member'. i The TAC has had an opportunity to review and discuss the materials, dated October 30, 2000 and information presented at the April 9, 2001 TAC meeting regarding the AdvanTex AX and RX treatment units. It is the understanding of the TAC that the request from tkmco is merely for certificadon of the AdvanTex AX and RX treatment units as approved technology in conformance with the provisions of Section XI of the Colorado State Board of Health Guidelines On.Indivtdual Sewage 1 Disposal Systems. Revised 2000 (Guidelines). The TAC farther 'understands the mare of the request to include no request for variances from sizing, siting, setback distances or any provision of the Guidelines. On the basic of the information presented, the nature of the request, and the recommendation of the Colorado Individual I Sewage Disposal Systems Technical nial Advisory Committer, the Wates Quality Control Division hereby certifies the Oren AdvanTex AX and RX atatmeat units for use in Colorado subjca to the following conditions and limitations: • Cettitcation of this product by the Colorado Department of Public Health and Erwitonme t does not guarantee acceptance by any individual'couaty within Colorado. Local health agencies have the authority to en fowe standards more stringent than those found acceptable by the State. Under this authority, local health agencies may elect not to acknowledge this certification, may accept the certification as issued, or may accept the certification subject to 1 conditions or limitations more stringent than those contained herein. • . No reductions from any sizing, siting or setback criteria contained in the Guidelines is permitted solely on the basis of use of the AdvanTex Systems. • It is the recommendation of Otenco Systems, Inc. that the AdvanTex treatment units be used to treat residential strength wastewater not exceeding the following influent parameters: Residential Strength Wastewater (Influent Characteristics) Characteristic Avenge Weekly Peak Rarely Exceed mg/L mgfL mgt 1011 150 200 300 TSS 40 60 150 TICK -a 65 75 150 C&O 20 25 25 CDPI-E-WECD William Cagle Business Development Manager Orenco Systems Incorporated July 3, 2001 Page 2of2 Fax Jul 3 2001 10:34 P.03 • Sizing of the AdvanTex treatment units shall be in conformance with the following siring chart as supplied by Orenco Systems Incorporated. AdvanTesrar Treatment Unit Filter Sizing Chart* AX Units Bedrooms Processing Tank Model marimam minimumsize(gols.) AX10 3 1500 AX20 4 1500 AX10/AX20 5 2000 Two-AX20 6 3000" • This table is developed based on meeting secondary effluent quality and the performance of routine maintenance. •• For multiple tanks, consult Orenco Systeme, Inc. or the local AdvanTex'u dealer for tank configuration and placement of the spline valve. • The use of an AdvanTex treatment unit to save any commercial, industrial, or multi -family system requires that We design of the endre system be prepared by a professional engineer registered in the State of Colorado. • This aeniflcatlon includes the application of the AdvanTex treatment unit to both new construction as well as repair/modification of existing onsite systems. A permit shall be obtained from the Local health authority prior tl the installation of an AdvanTex treatment unit • The term "design flow" as used in materials prepared and distributed by Orenco Systems, Inc. does not conform to the term "design flow' as contained in the Gvtdelines On Individual Sewage Disposal Systems. While this 1 certification accepts the recommendations of Orenco Systems regarding the Sizing aiteria.for the AdvanTex unitk, both the septic tank and soil absorption field must meet siring criteria for design flow as defined in the GuidelineSS. As with all on site wastewater treatment systems, ranine maintenance, in conformance with the manufacturer's recommendations, is necessary to achieve the treatment potential of the product/system. Therefore, it it recommended that all owners of these systems be provided with operation and maintenance (O&M) guidancc from the manufacturer. If you have any questions regarding the contents of this certification, please contact me at (303) 692-3574 or uun.bennenannie.co.us at your convenience. Thomas Bennett Environmental Protection Specialist rt: Local Health Agencies TeeHurt Advisory Committee Members OPERATION AND MAINTENANCE GUIDE FOR INDIVIDUAL SEWAGE DISPOSAL SYSTEMS Prepared by Sopris Engineering, L.L.C. April 6, 2000 Introduction A properly designed and utilized ISDS system should require minimal maintenance. In all cases the operation of the system should be automatic. Several factors influencing the need for maintenance include; actual wastewater flows into the system versus design flows, the volume of kitchen/domestic waste (excluding human waste and toilet paper), excessive household chemicals or other toxic liquids and the physical integrity of the system components. Maintenance of engineered and non engineered systems should include annual visual inspections of all structures, access/inspection ports and mechanical components if applicable. Larger dosing systems and large second homes may require periodic inspections with certain adjustments based on variable usage. ISDS Operation and Maintenance Septic Tanks It is recommended that the septic tank(s) should be inspected annually or if plumbing problems are experienced. In general, for a properly designed system, septic tanks should be inspected and pumped every 2 - 4 years. In addition to removal of the accumulated solids from the tank the service lines should be hydraulically cleaned. This procedure is usually performed by the septic pump service Ind is especially important in homes withheavy kitchen use and/or plumbing problems. The scum layer should not exceed a depth of 12" or exceed a depth of 3" above the bottom of the outlet device. The depth of solids (sludge) should not exceed 1/3 of the depth of the tank or a depth below the bottom of the outlet device of 1.5"-2.5" times the total liquid depth. The single most important aspect regarding maintenance of septic tank is the protection of the absorption area from failure due to suspended solids scouring the system. Measuring the scum and sludge layers is the only way to determine the need for pumping. Several methods can be used to determine if the above recommended depths have been exceeded from visual tape measurements to use of indicator sticks. Pumping the tank should be done by first breaking up the scum layer and mixing the sludge layer with the liquid portion by alternately pumping liquid from the tank and re -injecting it into the bottom of the tank. This procedure should be repeated until only a small residual of sludge remains in the tank which is necessary for seeding purposes. Tanks should never be washed or disinfected after pumping Material removed from tanks should be disposed of per methods approved by local health jurisdictions. Post pumping inspections are necessary to check inlet and outlet baffles and risers. Check for signs of damage, leaks in or out of tanks, proper sealin; of access risers and closure of lids. Check the inlet service pipe and the outlet distribution pipe for accumulated debris to determine if cleaning is needed. Check the seals around the pipes at the inlet and outlet ports on the tank to insure they are watertight. Repair any damage to insure the tatk operates as designed. Appropriate safety and sanitary practices should always be followed while working with sewage systems. Check anchoring devices if applicable. M Septic Tank Additives In general chemical, bacteriological or enzyme additives are not recommended or needed to maintain or improve septic tank efficiency. Available products have not been proven to enhance a systems performance and should not be used in an attempt to help breakdown solids to reduce the need for pumping. Some additives have proven to have adverse effects to the normal operation of the system. posing systems For systems with a dosing and/or distribution pump system it is recommended that the pumps, valves, siphons, tank, control floats, wires and any other applicable components be visually inspected annually for wear, damage, leaks, or other potential problems. Separate dosing tanks need to be checked for water tightness structural and plumbing integrity the same as for a septic tank. Check for evidence of sediments or scum layers which will indicate problems with the septic tank. Check to see if the water level markings on the side of the tank are consistent. Variability indicates that the distribution device, pumps, float switches and/or controls may not be operating properly. The dosing system should be checked for performance by observing it's dosing cycle, distribution pattern and calculating or monitoring its discharge volume. The current performance should be compared with previous observations and adjustments should be made to the controls if needed to maintain or improve compliance with the design. If a filter screen is used it should be cleaned as needed, annually and when the tank is pumped. absorption fields Absorption fields should be maintained with suitable cover and kept free of root invasive plants. Positive surface drainage away from the absorption field should be maintained. The inspection ports should be observed to check for distribution and infiltration of effluent in the system. Check the surrounding ground for seepage, excessive wetness or erosion near the base of the filter mound or field. Avoid any frequent or heavy equipment or vehicular traffic over a field and immediately, evaluate and repair any damage to the system if an impact occurs. Check for any signs of subsidence. Maintain any barriers to prohibit livestock form entering the area. Storm Drainage To the maximum extent possible Storm water shall be directed away from absorption fields and prevented, from entering system structures. Any breach in underground pipes or risers should be repaired as soon as possible. Alterations and additions to individual sites should be performed with respect to the existing ISDS system. Miscellaneous Guidelines and Precautions Avoid pumping tanks during high ground water months if tank is installed below the ground water table. Adequate anchoring on septic and dosing tanks is required on installations where groundwater is present. The absorption areas must be protected to prevent damage from vehicular or livestock traffic. 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