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Home My WebLink Aboutpitkin.eh.246734400027 (2005)(Barn)Document Layout (From Most Recent to Oldest Permit) Permit Application Log Sheet/Notes & Photos Communications As -built Design Engineer Design Soil Information Water Permit & Information Second System on property Third System.etc. Floor Plans Please See Building and Land Use Approvals Files for additional information. Permit # 05083 0 a Pitkin County Environmental Health Department Permit for an Individual Sewage Disposal System 0405 Castle Creek Road, Suite 10, Aspen, Colorado 81611 Phone 970-920-5070 / FAX 970-920-5077 Parcel ID# 2467-344-00-027 a410-I-3,+u-oo-GoI Type of permit New( ) Repair( ) Addition/Remodel to House( ) Name of Owner Rockv Mountain Institute Street Address 0030 Shining Mountain Way Property legal description Size of lot 1 acre Total square footage of the house Existing Barn Water source Gateway water system # of bedrooms in house # of offices, lofts & similar sized rooms in house Caretaker unit # of bedrooms in caretaker unit Designed for what # rooms (list) Total square footage of the caretaker unit # of offices, lofts & similar sized rooms in caretaker unit % bath and utility sink to be used by 2 people (sized as an office) Permit information Designed by Sopris Engineering Mailing Address 502 Main Street, Suite A3, Carbondale, CO 81623 Pero rate 36 mpi Profile hole depth 8 ft Depth to groundwater or bedrock Greater than 8 ft Minimum Septic tank capacity 100 gallons Minimum Absorption area 50 sq ft. Comments Septic permit approved per compliance with the engineer design and specifications dated August 25, 2005. Any changes must be approved by this department and the design engineer prior to them being made. Minimum horizontal distances between components of the system and physical features shall conform to the Pitkin County ISDS regulations. There should be a minimum 25 feet between any water lines and sewer lines. 1500 This system will consist of aAQe&gallon two-compartment tank with an effluent filter on the outlet. The field will consist of one trench buried to a maximum depth of 3 feet. The trench will be 26 feet long for a total of either Quick 4 chambers or 4 Standard chambers. This department does not endorse any brand of products. This permit must be kept on-site during installation. The engineer must do a final inspection of the installation and submit an as -built letter to this department. This department must also be called for an inspection with a minimum of 48 hours advanced notice. 'Revegetation over the area of the field is very important for the functioning of the system. Pitkin County has guidelines that must be followed to assure the plants that are introduced are appropriate for the conditions of the area. The use of native plants is strongly Permit approved by: .( Cr LX -)C IA Date: _L 1 10�> Plans and specifications of the proposed individual sewage disposal system have been reviewed and are considered satisfactory. Permission is hereby granted to the owner or the agent to perform the work indicated in accordance with the Pitkin County ISDS Regulation in effect at the time of issue. This permit becomes invalid 6 months from the date that the permit was issued unless system construction has commenced or an extension has been approved in writing by the Department. As -built drawings must be included with this permit before the ma pproval will be issued. I�n§ler eal: (C;j2 it F�LL Final approval: oxia B(nC Date: Ij JZOLo9 r5oit 9z"Z62 X(,OZ 1 PITKIN COUNTY ENVIRONMENTAL HEALTH DEPARTMENT APPLICATION FOR INDIVIDUAL SEWAGE DISPOSAL SYSTEM 0405 Castle Creek Road, Suite 10, Aspen Colorado 81611 Phone (970) 920-5070 Fax (970) 920-5077 Name of OWNER r Owner's Mailing Address . k 3 11 C . State, Z 01 Business Phone: 2 ns: QBE -mail Address: Primary Contact Person (all communication regarding this permit will go through this person) EName an a act Mailin Address - 1 7 3q State Zip 5 Al._.AII&S ele� 9/,Cc4- Business Phone Cell Phone : Fax : _ 5s -3r-7 E-mail Address: Parcel ID 0 (available from assessor's office at 920.6780 cratwww.pitkinessessor.ora) r] . 3- a Building Permit # (if available) - c— Streetaddressofproperty QQ?t�>_s*Az.;viyp MOW WJ;4e,5 NAl0 uarc mal Legal Description: Lot Block Filing Subdivision Size of lot: acres. Type of proposed structure:, A9 ,}A 4, I otal square feet of house dd8kl _ # of bedrooms (potential) in Caretaker unit: Attached ( ) Detached ( Permit is for: New Hom ( ) Repair due to failure ( ) Remodel/Addition (&-I- Emergency use ( ) Water: Private we Spring ( ) Stream ( ) Community/Public Water Systemfj If community system. Name of system The fee for a ISDS application Is $600 for a permit that 6 hours or less for the department to approve. If approval takes longer than 6 hours, a rate of $100 per hour will be charged. The maximum fee is $1000. The basic fee of $600 is due at the time of application. The remainder, it any, will be due in two stages: first, at the time of issuance of the ISOS permlt; second, before final approval of the ISDS permit. Application for an individual sewage disposal system is hereby submitted. I hereby certify that the above information is true and accurate and that I have provided true and accurate information on locations of all existing and proposed walla, contour intervals, buildings, property lines, ditches, slopes, waterlines, springs, suction or irrigation lines, drinking water cisterns, drain tiles, Irrigation ditches, lakes, water courses, streams, floodplain, dry gulches, and existing septic systems. I hereby certify that any such features not shown on attached site map are not present. Issuance of the permit does not Imply the approval of any other permit required for construction pursuant to Pitkin County codes. No construction may be undertaken until all approvais and permits have been obtained. The Pitkin County Environmental Health Department, Pitkin County and employees of these agencies will be held harmless should the Individual sewage disposal system fail or malfunption. The perntifTcTcopstruct is Issued on information submitted by the applicant o. his/her represents' )�he caner ssum s full responsibil, ity in ase of failure of the system) Signature of applicant — a Date Received by J ym e ) Date ID#: �al`�) Pitkin County Environmental Health Department Contact Log Sheet To _� Ir I" t,.,j rn • 0 0 PITKIN COUNTY ENVIRONMENTAL HEALTH & NATURAL RESOURCES DATE: 11/23/05 Send to: John Anderson From: Alicia Gomez Fax Number: 925-7278 Phone Number: 920-5087 CC: Paul Rutledge Number of Pages, Including Cover: 2 CC Fax Number: 704-0313 ❑ URGENT J REPLY ASAP J PLEASE COMMENT J PLEASE REVIEW 0 FOR YOUR INFORMATION COMMENTS: Septic Permit # 05083 for parcel 2467-344-00-027, owner Rocky Mountain Institute, has been finalized. Please feel free to call 920-5070 if you have any questions. fax cover Pitkin County Environmental Health and Natural Resources 0405 Castle Creek Road Suite #10, Aspen, CO 81611 Phone (970) 920.5070 1 Fax (970) 920.5077 Web site www.aspenpitkin.com/depts/12/ • 0 PITKIN COUNTY ENVIRONMENTAL HEALTH & NATURAL RESOURCES DATE: V311-7 11-7 l D cJ Send to: J6 Nn �NNL'l,p rs on Fax Number. q m— -I"Z-77 Cc Pati[ Liu k CC Fax Number: q10 JN -0313 ❑ URGENT ❑ REPLY ASAP COMMENTS: From: N b IL. C6kL Phone Number: q ZO -543s Number of Pages, Including Cover: 2 ❑ PLEASE COMMENT ❑ PLEASE REVIEW ❑ FOR YOUR INFORMATION Pitkin County Environmental Health and Natural Resources 0405 Castle Creek Road Suite #10, Aspen, CO 81611 Phone (970) 920.5070 1 Fax (970) 920.5077 Web site www.aspenpitkin.com/depts/12/ ILP ;��►' �� r,�,� ��T r :.•., r. l _ �I�l t cx�3o �i N iN� �� • � -�N `/lREk'PRoPosED �HRooM RUG -24--2005 15:27 HIOGEOTECH Gggtech 1JEOWORTH _ PAWLAK GEOTECHNICAL August 24.2005 j`I'. mr. .. •1 i. T� .. P.02/04 Ro-ky Mountain Institute Atm' Ethel Lossing 2317 Snowmess Creek Road Snnwmass, Colorado 91654 Joie Nn. 105 726 Subject' Percolation Testing, Burn Renovation, Shinning Mountain Wa}. Pitkin County, Colorado Dear Ms. Lossing: As requested by John Roberts. Hepworth • Yawlak Geotechnical. Inc.. performed percolation testing at the subject site. The work was done in accordance with or t' agreement flit professional services to you. dated August 17.21005. A profile pit and three percolation lost holes were excavated on ust 17, 20U5 . the locations shown on Figure 1. The subsoils exposed in the Pro flit helow foot of topsoil consisted of silty clayey sandy gravel with cobbles tic bottom pit depth of 9 feet. Practical digging refusal sura encountered at 5'/s f in the lirst attempted profile pit loomed southwest of the percolation test holes. No cc c wafer was observed ! n the pi t and the soils were slightly moist to moist. Percolation test holes were hand duff in the bottom of the shallow backhoe pits and soaked with water on August 17. 2005. Percolation testing was conducted on August 18, 2005. by a relimsentative el Hepworth - Pawlak Geotechnical, Inc. The percolation test results arc summarized on Table 1. The averHat percolation rates varied from 17 to 60 minutes per inch with tin overall average rate off' 36 rnimnes per inch. Based nn the subsurface conditions encountered and the percolation test results, the tested area should be suitable for a conventional is illiation septic disposal system. Pitkin County requires that a professional civil enginve.r design) the septic disposal system. I f .A oo have any questions or need further assistance. please c;dl our office. Sit:rcrcly, IITPWO T[I - YAWLAK GEOTrCHNICAI., INC. Louis E. Eller Reviewed by: Daniel E. Hardin, Y. " LUF/ksw Zatiy2WLiun'l attachments rigu lation Test Holes Table 1 est Results cc: Sopris Engineering-71ffrPaul Rutledge Parkrr 10.3.841-7119 • Colorado Sprii tm 719-633-5562 • Silverthorrie 97J-40$-1989 RUG -24-2905 1528 APPP.OXIAAATE SCALE AMTECH • PROFILE PF 0 El EXISTING ` �.- SHEA RA Lpi P2 EXISTING SPCD � P3 �J(I5iING BARN MWEMti c1' I I LOCATION OF PERCOLATION TEST 105 726 H powm-pawn (� HOLES Figura 1 PUG -24--2005 15728 MkTECH • P.04/04 HEPWORTH-PAWLAK GEOTECHNICAL, INC. TABLE 1 PERCOLATION TEST RESULTS 308 NO. 105 726 HOLE NO. HOLE DEPTH (INCHES) LENGTH OF INTERVAL (MIN) WATER DEPTH AT START OF INTERVAL INCHES WATER DEPTH AT END OF INTERVAL INCHES DROP IN AVERAGE WATER PERCOLATION LEVEL RATE (INCHES, (MIN./INCH) i i P 1� 32 IS 7 6 1/4 i 3/4 0 I 60 6114 6 1/4 7 63/4 j 63/4 61/2 1/4 1/4 61/2 6 U4 1/4 6 1/4 6 1/4 P2 37 15 6 SI/4 51/4 i 41/2 3/4 3/4 30 6 51/4_ r 3/44 j 51/4 43/4 43/4 j 1/2 41/4 1/2 41/4 33/4 1/2 P3 41 1s 8 71/4 3/4 17� 71/4 6112 3/4 73/4 7 3/4 7 _ 61/2 1/2 61/2 6 1/2 S 1/2 3/4 ^ 6 Note. Percolatlon test holes were hand dug in the bottom of backhoe pits and soaked on August 17, 2005. Percolation tests were conducted on August 18, 2005. The average percolation rates were based on the last three readings of each test. 3 TOTAL P.04 Ethel Loosing Rocky Mountain Institute 2317 Snowmass Creek Road Snowmass, CO 81654 NOV 2 2005 November 17, 2005 PITKIN Cpl;;yTy ENVIRONMiy7AL RE: As -Built -On -Site Wastewater System, Shop & Bam Facih�Y, Tii t On -Site Wastewater System 0030 Shining Mountain Way, Pitkin County, Colorado Sopris Engineering Job No. 25192.01, ISDS Permit No. 05083, Parcel No. 2467-344-027 Dear Ms. Lossing: Pursuant to County Regulations, this letter provides documentation that the new OWS system recently installed is in general compliance with the permitted design. Sopris Engineering has performed site visits to measure, inspect, and document the as built conditions of the constructed system. We have coordinated our efforts with the contractor that constructed the system. The system was inspected prior to backfilling and after all installations were completed. The as -built conditions and installation of the new OWS components is in compliance with the permitted design specifications for the system. The septic tank, distribution pipe, and absorption field installations are in accordance with Pitkin County Regulations, the design presented in the Sopris Engineering design drawing, dated August 25, 2005. A 1500 gallon dual compartment concrete septic tank was installed with 4" tee baffles and an effluent filter. The absorption field was constructed with a total of 8 Quick4 Infiltrator leaching chambers in a single trench configuration 34' long containing 8 chambers with end caps. The chambers were backfilled with native screened soil and backfilled to the finished surface grade with native excavated soil. The trench was installed level. An inspection port was installed on the end chamber. The chambers were installed in native soil consistent across the trench. The trench has an individual distribution lines, from the septic tank outlet connected to the end cap at the head of the trench. The minimum setback distances have been maintained. The trench is installed approximately 3' deep relative to the existing grades. Additional observations of the soils within the field were performed during construction indicating that the soils are consistent with the reported descriptions. No ground water was encountered in any of the excavations on site. The capacity of the tank was increased to 1500 gallons to provide for the potential future expansion of the system to accommodate sewage from the existing office/residential building on the site located above the shop and barn facility. The building is currently served by an existing OWS. No immediate renovation plans are proposed and no indications of any problems with the existing system has been reported or observed. However, it was determined that a future expansion to the new system is feasible to serve the existing office/residential facility in the future if needed. Therefore the tank sizing and the location of the absorption field was considered to allow for such an expansion. We understand that a permit for any upgrade, expansion or change in use will be required based on proposed design plans. 502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311• Fax (970) 704-0313 Sopnis ENGINEERING • LLC civil consultants f L/ qPEthel Loosing SE Job No. 25192.01 November 17, 2005 Page 2 OWS Operation and Maintenance The owner shall periodically inspect the OWS, perform any maintenance required and periodically pump the septic tank as necessary to ensure that the system is in good operating condition and performing as designed. 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, sanitary tees and effluent filter should be visually inspected bi-annually for clogging debris, damage or leaks. In general, for a properly utilized system, septic tanks should be pumped and inspected every 2 - 4 years. The effluent filter should be cleaned every six months and at the time of pumping. Absorption fields should be maintained with suitable vegetative cover and kept free of root invasive plants. Positive surface drainage away from the absorption field should be maintained. If you have any question or need any additional information, please call. Sincerely, SOPRIS ENGINEERING, LLC Pa utledge Design Engineer Roberts 40 to Ethel Loosing Rocky Mountain Institute 2317 Snowmass Creek Road Snowmass, CO 81654 RE: Shop At Barn Facility, On -Site Wastewater System, 0030 Shining Mountain Way, Pitkin County, Colorado Sopris Engineering Job No. 25192.01 Dear Ms. Lossing: Pursuant to your request, attached herewith is a letter presenting our findings in regard to the feasibility of design and approval of an engineered septic system for the above referenced Site. An OWS to serve the needs of the proposed 1/2 utility bathroom in the existing barn. The system will include the installation of components designed for treating wastewater based on the site-specific conditions and usage of the facility. This design is based on our evaluation of the site conditions with information provided by others for use in supporting your application to Pitkin County. Our recommendations are in accordance with Pitkin County and the State of Colorado ISDS Regulations. Pitkin County must permit any proposed improvement to the site. We have reviewed the information forwarded to us, conducted a site visit, formulated an OWS design and created a site plan with constriction details 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 accordance with the Regulations of Pitkin County and the State of Colorado. We recommend that a 1000 -gallon septic tank be installed that will discharge effluent to a 50 square foot soil absorption trench system. The soil absorption system can be installed in native soils and will be located within the general area down gradient of the existing barn, as delineated on the attached plan. The system will meet all required setbacks and be installed within the general boundaries indicated on the plan. Our design is outlined below and delineated on the attached site plan. Site Location The subject site is located on a parcel of the Rocky Mountain Institute, within Pitkin County, Colorado. The site is situated in Section 21, T 8 S, R 86 W of the 6t° P.M. The Site comprises approximately 1 acre. The site is bounded to the west by office and/or living quarters and in other directions by agricultural, pasture land or marshland. Existine Site Conditions The site is located on partially developed agricultural utility dry rangeland. The site has a gentle slope (2%-8%) toward the east. The site is covered with native grasses and weeds. Domestic water is supplied by an existing well. There are no wells within 100 feet of the general vicinity of the absorption field. Proposed Site Conditions It is our understanding that you intend to construct a l- bath with a single toilet and lavatory sink in the existing shop/ barn facility. The average number of employees using the facility will be 2 people for 4 hours a day, 5 days a week. The peak number of employees using the facility will be 3 people for a typical 8 -hour day, 5 days a week. Therefore the system is designed to handle the flow for peak usage. The proposed improvements will include a n w 502 Main Street • Suite A3 ❑ Carbondale, CO 81623 ❑ (970) 704.0311 ❑ fax (970) 704.0313 SopRisENGINEERING • LLC civil consultants 0 a Ethel i.ossing SE Job No. 25192.01 August 25, 200 Page 2 OWS system with appropriate site grading. The septic tank and the absorption trench are to be generally located down gradient, to the southeast of the barn, as shown on the plan. Subsurface Conditions A subsurface investigation and percolation test was conducted on August 17, 2005 by Hepworth-Pawlak Geotechnical, Inc (HP). The results are attached in the HP report, dated August 24, 2005 Job Number 105-726. The geotechnical evaluation indicates that the onsite soils are generally composed of � foot of topsoil overlying silty clayey sandy gravel with cobbles to 3 feet. No free groundwater was encountered. Percolation testing utilized three test holes, which yielded variable absorption rates. The fastest measured rate was 17 minutes per inch and the slowest measured rate was 60 minutes per inch. The average percolation rate is 36 minutes per inch and should be suitable for a conventional absorption system. Design Criteria We may recommend the installation of an absorption field with conventional leaching chamber trenches in native soils. The absorption field is designed based on utilizing the native soil for treatment in trenches. Based on the reported percolation rate and observations of the percolation holes and test pit we have designed a system that will treat the calculated quantity of effluent with native soils utilizing the standard field sizing equation based on the average percolation rate. The treated effluent will be absorbed into the natural soils across the bottom area and a portion of the sidewall areas of the trench excavations. Some areas in the proposed trenches may need soil replacement to mitigate the presence of scattered cobbles and/or boulders. We recommend the placement of salable soil or sand placed to a level grade along the trench. Any large voids in the excavated trench bed shall be backfillcd with 3" minus material or screened pit run. An average 6' separation distance of undisturbed soil needs to be maintained between the trenches. Use native soil screened of rocks in excess of 3" for backfill over and around the chambers or concrete sand or screened rock. Desl¢n Flowrate The proposed utility system is for a single 'h bath facility. The new OWS shall be based on a minimum of 3 - employees using the facility at 15 gallons a day per employee. From the Pitkin County ISDS Regulations, the design flow is calculated as follows: Number of employees (typical office) —15 gallon per day per employee Max.. Design flow (Qd) = N of people x 15(avg. flow gal/person/day) x 1.75 = gal/day Qd = 3'15"1.75 =79 gal/day • 0 Septic Tank Design Ethel Lossing SE Job No. 25192.01 August 25, 2005 Page 3 Residence Qd = 79ag Udav Volume (V) of tank = Design Flow * 1.25 (30 hour retention time) V = 79 gal/day • 1.25 = 100 Use one double compartment concrete 1000 -gallon septic tank. A smaller septic tank is allowable if feasible however select bedding and special back fill procedures are required for a polyethylene tank. Other types of plastic tanks may be used and installed per the manufacturers recommendations. Steel tanks are not allowed. The minimum 1000 -gallon concrete septic tank is durable and may be used if usage increases in the future. Soil Absorption/Treatment System Design The average percolation rate is 36 minutes per inch. We are using a minimum of 36 minutes per inch for design. The field is sized by using the standard absorption area equation based on the design flow and the percolation rate. Pitkin County allows up to a 50% reduction in the size of the soil absorption trench system, utilizing gravelless leaching chambers. Based upon the design percolation rate, the standard absorption area equation is: A (SF) = O *ft) : where A = Area; Q = flow (gal/day) 5 t = time in minutes This design calculation results in a recommended minimum absorption area: A = 79 *(40) " = 100 sq. ft. 5 Apply a 50% reduction for utilizing gravelless leaching chambers in a trench configuration. A =100 sq. ft. (0.50) = 50 sq. ft. Assume 15.5 square feet per standard chamber. Assume 9.87 square feet per "Quick 4" chamber: 50 sq.ft. = 4 chambers Use 4chambers 15.5 sq.ft/chamber 50 sq.ft. = 6 chambers Use 6 chambers 9.87 Approximately 50 sf of absorptive surface area is required for the absorption field. We recommend using a trench system consisting of a single 26 -foot long trench. Use a total of 6 Quick 4 infiltrator chambers in one trench or 4 standard leaching chambers in one trench. The field will be approximately 26' long by 3' wide. The trench shall be constructed level along the site contours. The trench shall be constructed not to exceed a maximum depth of 3 feet. An inspection port should be installed on the top preformed cutout at each end chamber in the trench. This will allow for location of the field and for checking the performance of the system over time. Equal distribution is required. The system has to meet all required standards and setbacks for a conventional system. All septic system components and trench installations are to be approved by the Engineer and Pitkin County prior to backfilling. /U 0 Effluent Distribution System Ethel Lossing SE Job No. 25192.01 August 25. 2005 Page 4 A gravity distribution system will be utilized to transport effluent from the concrete septic tank to the head of the trench. An effluent filter will be installed in the secondary compartment of the second septic tank to reduce suspended solid loading to the absorption trenches and extend the life of the treatment media in the trenches. A 4" PVC effluent line will discharge effluent to the to the head of the trench. The 4" PVC line will be installed with a minimum 2% slope. Appropriate chamber end plates or splash plates shall be installed at the inlet to prevent scouring of the trench bottom surface. An inspection port should be installed on the top preformed cut out at both end chambers in the trench. This will mark the field and allow for checking the performance of the system over time. ISDS Oneration and Maintenance The system shall be inspected on a regular basis and be properly maintained. The system and responsibility for repair and maintenance of the system will remain with the Lot Owner. The onsite system 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, absorption field and effluent filter 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. 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. 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. The Regulations further require site inspections and approval by the County Environmental Health Department of the exposed components of the system prior to backfilling. Therefore the County Environmental Health Department should also be contacted and notified of the construction schedule. General Notes 1) All materials and installation practices shall conform to the Pitkin 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. 3) Add a two-way clean out on the service line from the proposed house. 4) The system shall be plumbed to distribution effluent into the trenches 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 each trench. A splash plate shall be installed on the trench bottom surface below the inlet in each serial trench to prevent scouring from the effluent or an appropriate chamber end plate may be used to prevent scouring from the effluent. The top of the backfill over the chambers �y Ethel Lossing SE Joh No. 25192.01 August 25. 2005 Page 5 shall be covered with filter fabric or other suitable pervious material to prevent the migration of fines from the overlying topsoil layer. 8) The trenches 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 absorption trenches must be sodded or covered with vegetative ground cover. Our design and recommendations are based upon data supplied to us by others. If subsurface or site conditions are found to be different from those presented in this report, we should be notified to evaluate the effect it may have on the proposed OWS. If the County Environmental Health Department requests changes or modifications to this design, we should be contacted to evaluate the effect on the OWS. if you have any question or need any additional information, please call. Sincerely; SOPRIS ENGINEFRING, LLC v4i��5 1 ou C,3 i K, r� ZN ST, Tu � Cz_ « 9-2s-o- T 1 4k - 7„1,P ELECT2('C- BRSEt3owD NBA TER, Moo v *ttuvT-A� PIN S'wt rvk A(--R SY�Ot� SS, 0.O st(oE f Da F��, ri� N W� i ;knot i 18-23- os - RMI OFFICES / / I I/ / 20 o o GRAPHICI SCALE I / o 20 41D 0 ( IN FEET ) I u' 1 inch =I 20 ft. e I I I I I I I I I I I II ARCEL BOUNDARY EXISTING BARN W/ PROPOSED WATER CLOSET W/ LAV SINK GRAVEL DRIVEWAY CLEANOUT LINE FROM 1/2 BATH NSTALLED A 1500 GAL. DUAL COMPARTMENT CONCRETE SEPTIC TANK. PP INSTALLED SANITARY TEES ON THE INLET O AND OUTLET PORTS. INSTALLED AN EFFLUENT FILTER IN THE OUTLET TEE. �-4 DIA. DISTRIBUTION PIPE INSTALLED / IN THE END CAP PORT. A SPLASH P IS INSTALLED BELOW THE INLET. INSTALLED A 3' X 32' G LLESS CHAMBER ABSORPTION FIELD. INSTALLED 8 QUICK -4 I LTRATOR CHAMBERS IN A SINGLE TRENCH FOR A TOTAL ABSORP AREA OF 79 SQ. FT. LOCATION OF THE FIELD MUST MEETS AL OUNTY SETBACK REQUIREMENTS. THE CHAMBERS IN THE TR CH IS INSTALLED AT LEVEL GRADE THE BOTTOM ELEVATION THE TRENCH HAS A MAXIMUM DEPTH OF 3 FEET TO THE INFIL TIVE SURFACE BELOW THE EXISTING GRADE. PROFILE PIT THE SYSTEM IS PL BED WITH A DISTRIBUTION LINE CONNECTED TO O THE HEAD OF TH ENCH. PT -2 296 a Q wPERCOLA77ON TEST HOLES (TYP).— o I c2 Q PP O x HORSE PASTURE x PORT LINE TWO WAY CLEAN OUT PROPOSED GRADE PROPOSED BUILDING EXISTING GRADE EFFLUENT FILTER OUTLET TEE z 17 –EFFLUENT DRAIN LINE AT MINIMUM 2% SLOPE TAN K EFFLUENT DISCHARGE LINE AT MINIMUM 1% SLOPE -DISTRIBUTION LINES AT MINIMUM 1% SLOPE CROSS SECTION SYSTEM DETAIL N.T.S. CROWN FIELD TRENCH TO DIVERT SURFACE WATER REVEGATATION TOPSOIL LAYER 3' MIN ------- w-�— 6' MIN BACKFILL LAYER NATURAL — ONSITE SOILS FREE OF ROCKS FILTER FABRIC c BACKFILL WITH SCREENED ONSITE SOILS FREE OF ROCKS IN EXCESS OF 3" DIAMETER OR USE 3/4" TO 1.5' SCREENED ROCK SCARIFY/TILL BOTTOM SURFACE TO —� LEACHING CHAMBER (TYP.) A DEPTH OF 3" AND RAKE LEVEL 12" MIN[ -36" MAX. LEACHING CHAMBER -SELECR SOIL REPLACEMENT CONCRETE SAND AS NEEDED _ND PLATE INLET PORT NATIVE SILTY CLAYEY, SAND SOILS W/ GRAVEL AND SANDY CLAY NOTE: ALL CHAMBERS IN EACH TRENCH MUST BE INSTALLED ON LEVEL GRADE. MAINTAIN 6' OF UNDISTURBED SOIL BETWEEN TRENCHES. THE ELEVATION OF ADJACENT TRENCHES MAY VARY. MAXIMUM DEPTH OF TRENCHES NOT TO EXCEED 36" BELOW PROPOSED SURFACE GRADES. INLET AND END CAPS ARE TO BE INSTALLED ON EACH END CHAMBER ROW. INSTALL A 4" VERTICAL INSPECTION RISER FROM THE CUT OUT ON THE TOP OF THE END CHAMBER IN EACH TRENCH. ALL TRENCHES TO BE INSTALLED WITH APPROPRIATE END PLATES. IF EXCESSIVE ROCK FRAGMENTS OR GRAVELS ARE ENCOUNTERED IN ANY PART OF THE EXCAVATION, OVER EXCVATE AND BACKFILL WITH MINIMUM 6" CONCRETE SAND OR SCREENED NATIVE SOILS. CHAMBER TRENCH CROSS SECTION DETAIL N.T.S. 25192.01 225192-OWS-PLAN.DWO 8-25-05 OWS SYSTEM NOTES 1. ALL MATERIALS AND INSTALLATION SHALL CONFORM TO STATE AND COUNTY INDIVIDUAL SEWAGE DISPOSAL SYSTEM (ISDS) REGULATIONS. 2, IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO CONTACT ALL UTILITY COMPANIES FOR FIELD LOCATIONS OF UTILITIES PRIOR TO CONSTRUCTION AND EXCAVATION. 3. ALL SEWER LINES TO BE SDR -26 OR SCHEDULE 40 P.V.C. PIPE UNLESS NOTED OTHERWISE. 4. INSTALL A TWO-WAY CLEAN OUT ON THE SERVICE LINE FROM THE BARN. 5. THE SEPTIC TANK SHALL BE INSTALLED LEVEL ON COMPACTED EARTH. INSTALL WATERTIGHT RISERS AS NECESSARY TO BRING ALL REQUIRED ACCESS POINTS TO THE FINISHED SURFACE GRADE. BACKFILL WITH SUITABLE NATIVE SOIL FREE OF BOULDER AND ROCK IN EXCESS OF 6°DIAMETER. 6. A SANITARY BAFFLE TEE IS REQUIRED ON THE SEPTIC TANK INLET AND OUTLET. INSTALL THE INLET AND OUTLET TEES PLUMB AND IN A POSITION TO ALLOW EASY INSPECTION AND MAINTAINANCE OF TANK FROM THE TANK RISERS. 7, WE RECOMMEND THE INSTALLATION OF A 4" EFFLUENT FILTER CONTAINED IN THE 4" BAFFLE OUTLET TEE OF THE SEPTIC TANK. THE FILTER SHOULD BE INSPECTED EVERY SIX MONTHS. THE EFFLUENT FILTER SHALL BE MAINTAINED AND CLEANED WHEN THE TANK IS PERIODICALLY PUMPED OR AS NECCESSARY. INSTALL A SUITABLE EXTENSION ON THE FILTER WITH A HANDLE TO BE WITHIN 6" BELOW THE ACCESS LID. 8. THE CONTRACTOR SHALL ENSURE THAT THE SEWER LINES, SEPTIC TANK AND RISERS ARE WATERTIGHT. ALL PLUMBING FIXTURES AND OWS COMPONENTS SHALL BE INSTALLED AND MAINTAINED TO AVOID SURFACE OR GROUNDWATER FROM ENTERING THE SYSTEM AND TO PREVENT LEAKAGE FROM THE SYSTEM. IN-HOUSE PLUMBING FIXTURES SHALL BE MAINTAINED TO PREVENT EXCESS WATER FROM ENTERING THE SEPTIC SYSTEM. 9. THE DIMENSIONS AND NOTES SHOWN ON THE PLAN INDICATE MINIMUM AREA, LENGTH, WIDTHS AND SEPARATION DISTANCES FOR THE TRENCHES, BED OR MOUNDED ABSORTION FIELD. 10. THE ABSORPTION TRENCHES SHALL BE EXCAVATED TO LEVEL GRADE IN NATIVE EARTH. THE TRENCH BOTTOM AND SIDEWALLS SHALL BE SCARIFIED AND/OR RACKED IF SMEARING OCCURS. IF EXCESSIVE LARGE COBBLES OR BOULDERS ARE ENCOUNTERED IN ANY PART OF THE EXCAVATION, OVER EXCVATE AND BACKFILL WITH SAND. A 6" LAYER A SAND MAY BE USED AS SOIL REPLACEMENT MATERIAL IF EXCESSIVE ROCK FRAGMENTS ARE ARE ENCOUNTERED IN THE TRENCH EXCAVATION. 11. THE LEACHING CHAMBERS SHALL BE INSTALLED LEVEL WITH A MINIMUM COVER OF 12 INCHES NOT TO EXCEED 36 INCHES AND CONNECTED I.OR EQUAL DISTRIBUTION. 12. STANDARD OR QUICK4 LEACHING CHAMBERS WILL BE PLACED IN THE TRENCHES OVER THE NATIVE SOIL OR SELECT SOIL REPLACEMENT. END PLATES SHALL BE INSTALLED ON THE END CHAMBERS IN EACH TRENCH. 13. INSTALL LEACHING CHAMBERES LEVEL ALONG THE EXISITNG CONTOURS OF IN THE PROPOSED ABSORPTION AREA. INSTALL A SPLASH PLATE BELOW THE INLET IN EACH TRENCH TO PREVENT EROSON OF THE BOTTOM SURFACE. 14 VERTICAL INSPECTION PORTS SHALL BE INSTALLED FROM THE CENTER PRE MARKED HOLE ON THE TOP OF THE SERIAL END CHAMBERS. (TYP. END OF EACH ROW) THE PORTS MAY HAVE TREADED CAPS AT GRADE. 15. THE CHAMBERS WILL BE BACKFILLED WITH EXCAVATED MATERIAL VOID OF ROCKS, THE BACKFILL MATERIAL SHALL NOT EXCEED 2 1/2" DIAMETER AND SHALL BE PLACED TO AT LEAST 6 INCHES ABOVE THE TOP OF THE CHAMBERS. THE TOP OF THE PLACED BACKFILL SHALL BE COVERED WITH A LAYER OF FILTER FABRIC. A MINIMUM 4" DEPTH OF TOPSOIL IS TO BE PLACED ABOVE THE BACKFILL TO THE SURFACE. 16. ALL INSTALLATION OF LEACHING CHAMBERS SHALL BE IN CONFORMANCE WITH THE MANUFACTURES INSTALLATION INSTRUCTIONS. 17, THE ABSORPTON TRENCHES/BED OR MOUND MUST BE GENERALLY MARKED AT THE ENDS WITH INSPECTION PORTS AND/OR BURIED REBAR. THE FIELDS MUST BE PROTECTED FROM VEHICULAR AND LIVESTOCK TRAFFIC. 18, THE ABSORPTON FIELD SURFACES MUST BE SLOPED TO DIVERT SURFACE DRAINAGE AWAY FROM THE FIELD. 19, THE ENTIRE ABSORPTION FIELD SURFACE MUST BE REVEGATATED. THE ABSORPTION FIELD SHALL BE INSTALLED PER THE REQUIRED SETBACK DISTANCES: 10 feet from any property line. 25 feet from any potable water supply line. 20 feet from any interior occupied dwelling space. 100 feet from any well, spring or cistern. 50 feet from any stream or water course. DISTRIBUTION SYSTEM NOTES: 1. AN EFFLUENT FILTER SHALL BE INSTALLED IN THE DISCHARGE TEE IN THE SECONDARY COMPARTMENT OF THE SEPTIC TANK. FILTERED EFFLUENT WILL DISCHARGE TO THE HEAD OF THE CHAMBER ROW. 2, WE RECOMMEND THE INSTALLATION OF AN ORENCO SYSTEMS 4" EFFLUENT FILTER CONTAINED IN A 4" BAFFLE OUTLET TEE. THE FILTER SHOULD BE INSPECTED EVERY SIX MONTHS. MAINTENANCE SHALL INCLUDE INSPECTION AND/OR CLEANING THE FILTER EVERY SIX MONTHS MINIMUM AND AFTER PERIODIC PUMPING OF THE TANK. 3. THE DISTRIBUTION LINE FROM THE TANK TO THE TRENCH SHALL SHALL BE INSTALLED AT A MINIMUM OF 2% SLOPE. ALL DISTRIBUTION PIPING, CONNECTIONS AND FITTINGS SHALL BE WATER TIGHT. GENERAL NOTES: 1. THE OWS SYSTEM AS SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY SOPRIS ENGINEERING. THE PROPOSED LOT CONDITIONS AND SURVEY INFORMATION WAS PROVIDED BY RMI. 2005 ryn, NO.1 DATE I REVISION BY 0030 SHINING MTN, WAY SNOWMASS, PITKIN COUNTY, CO ROCKY MOUNTAIN INSTITUT SHOP & BARN FACILITY AS—BUILT ON—SITE WASTEWATER SYSTEM OPRIS ENGINEERING. LLC. SITE PLAN AND SYSTEM DETAILS 502 MAIN STREET, SUITE A3 DES. PER I CK. YTN I FILE NO. SHEET 1 CARBONDALE, CO 81623 251-92-01 OF 1 (970) 704-0311 DR. PER DATE 10/31/05 0 y