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Home My WebLink About1.08 SewerOctober 16, 201 Jeffrey Sabo Legacy Homes of Aspen, Inc. 612 Surrey Road Carbondale, CO 81623 RE: Regulatoty Capacity of the As -Built OWTS System, Sabo Property, Lot A, County Road 109, Garfield, CO SE Job No. 25254.01 Dear Jeffrey: Pursuant to your request, this letter provides a summary of the regulatory capacity of the existing OWTS in use on your property. Sopris Engineering has previously performed site visits to measure, inspect, and document the as built conditions of the constructed system. As noted in our As -Built Certification letter dated Septemer 17, 2007 the as -built conditions and installation of the OWTS components is in compliance with the permitted design specifications for the system presented in the Sopris Engineering design drawing, dated April 14, 2006 and revised March 22 2007. The design was based on the current regulations at the time of permit. This letter presents the current capacity calculation based on the design and with respect to the new current County adopted OWTS Regulation 43. As -built OWTS Condition The system consist of a primary 1500 -gallon dual compartment concrete septic tank and a secondary 1000 - gallon dual compartment concrete septic dosing tank that was installed in series with an Orenco duplex biotube filter pump assembly. The duplex dosing pump system is installed in the secondary compartment of the second tank to dose primary treated effluent to the absorption field. The Rill pressure dosed absorption field was constructed with a total of 72 Quick -4 infiltrator leaching chambers in a trench configuration with (6) 52 -long trenches containing 12 chambers each. The treatmentlabsorption field system is configured for alternating pressure distribution over 2 pressure distribution zones (3 trenches per zone) through alternating pumps. The effluent fiom the secondary tank is distributed by alternating duplex pump assemblies in the dosing/septic tank (pump vault). Each trench has a custom perforated pressure distribution pipe running the length of the chamber row. Three trenches are dosed per each dosing pump cycle by alternating pumps. The dual 1.25 -inch transport lines from cacti pump is bedded in road base and installed to allow gravity drainage of effluent back to the tank and to the individual distribution zone manifolds respectively on each set of trenches located at a high point at the head of the trenches. The chambers were installed in the native silty sand and gravel with cobbles soils over 6" of concrete sand consistent across the field. The field has two sets of trenches with pressure manifolds and individual split flow tees that connect with the pressurized perforated distribution laterals at the head of each trench. The 6 trenches have a separation distance of approximately 6 feet and are installed approximately 2 to 3.5 feet 502 Main Street • Suite A3 • Carbondale CO 81623 • (970) 704-0311 • Fax (970) 704-0313 Sums ENGINEERING • LLC civil consultants Jeffrey Sabo SE Job No. 25254.01 October 16, 2015 Page 2 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, Sub Surface Soil Conditions A subsurface soil investigation was conducted by HP Oeotech Inc. The report indicates soils consisting of 1 1/2-2 feet of topsoil overlying silty sandy gravel with cobbles and scattered boulders. Percolation testing performed onsite indicated rates between 26 MPI and 20 MITI with an average of 23 MPI used for soil treatment unit (STU) design. The Soils are characterized as a soil type 2, pursuautto USDA soil texture/structure classification methods. The soils consist of loamy sand to sandy loam with moderate granular structure -grade that have an equivalent percolation rate between 16 and 25 mpi. The long term Acceptance rate (LTAR) for treatment level I is 0.60 gals/SF/day. OWTS Design Criteria Per Former Regulation OWTS Design Per Former County ISDS Regulation: Single family 5 -bedroom home & future single bedroom or office ADU Design flow (Qd) = Q avg. flow (# of people x 75 gaVperson/day x 1.5 (peaking factor) = gal/day (design) 6 bedroom house equivalent @ 2 persons per bedroom Qavg=6x2x75=900 gal/day Qd = 6x2x75xl.5 =1350 gal/day Total Peak Design Flow is 1350 gal/day Required septic tank volume is 1750 gallons Total Septic Tank Volume is 2500 gallons Treatment trenches Absorption/Infiltration Area Design: Average percolation rate of 23 minutes per inch. A (sf) = (Qd *(t) %z: where A = Area; 5 t = time in minutes per inch=23mpi Qd = flow (gal/day) =1350 gpd Apply 50% reduction to A for gravelless trench chambers and dosing. A(credit reduction) = 1350 *(23) % x 0.5 = 647 S.F. 5 Number of Quick -4 Infiltrator Chambers = 647 SF/9.87 = 65 Chambers. Installed 72 Chambers. OWTS Design Per Current Adopted County Regulation 43: Single family 5 -bedroom home & future single bedroom and office ADU Design flow (Qd) = Q avg. flow (# of people x 75 gal/person/day x 1.5 (peaking factor) = gal/day (design) 6 bedroom house equivalent @ 2 persons per bedroom for first 3 bedrooms & 1 person per bedroom for each additional bedroom Qavg = 3x2x75= 450 gal/day Qavg = 3xlx75= 225 gal/day Qavg = Office employees up to 15 persons at 15 gpd/capita = 225 gal/day Total Design Flow is 900 gal/day Required septic tank volume is 2000gallons Total Septic Tank Volume is 2500 gallons Jeffrey Sabo SE Job No. 25254.01 October 16, 2015 Number of Quick -4 Infiltrator Chambers (Regulation 43) Page 3 (LTAR) for treatment level 1 is 0.60 gals/SF/day. L.F.1=1.0 Pressure Distribution (Table 10-2) L.F.2=0.7 Chambers in Trench (Table 10-3) Absorption area per Infiltrator Quick -4 leaching chamber = 12 S.F. 900/0.6x.7x.8=840 sf /12 = 70 chambers. Installed 72 Chambers. Summary The OWTS has the capacity to handle and treat sewage flows for up to 9 single family residential bedrooms or tip to 6 single fancily residential bedrooms with additional capacity for office employees or and ADU pursuant to Table 10-1 of the County adopted Regulation 43. The System has significant excess capacity above its current usage based on the existing 4 -bedroom single family home. Continued Usaee and Maintenance The OWTS should be inspected on a regular basis and be properly maintained. The system and responsibility for repair and maintenance of the systems will remain with the Owner. The owner shall employ the services of qualified service providers to inspect the OWS and 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. In general, for a properly utilized system, septic tanks should be ptunped 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 Paul E. Rutledge Design Engigger. 26377 P.E. a�al GARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT 108 Eighth Street, Suite 201 Glenwood Springs, Coloradof 81601 Phone (970) 945.8212 INDIVIDUAL SEWAGE DISPOSAL PERMIT Permit 4 2 6 4 Assessor's Parcel No. This does not constitute a building or use permit. PROPERTY t Z L— Q s'4a It _70L4- IqSn Owner's Name. Present Address "�� Y t:.� Phone Systemr im+ � l o9 l' ►� Location (� �'1 (y Legal Description of Assessor's Parcel No. 0.39r 3 — a SYSTEM DESIGN Septic Tank Capacity (gallon) Percolation Rate (minutes/inch) Required Absorption Area - See Attached Special Setback Requirements: Date Inspector Other Number of Bedrooms (or other) FINAL SYSTEM INSPECTION AND APPROVAL (as Installed) Call for Inspection (24 hours notice) Before Covering Installation System Septic Tank 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 Date �- 0_0 9_ Inspector RETAIN WITH RECEIPT RECORDS AT CONSTRUCTION SITE aCONDITIONS: 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, orinstalis an Individual sewage disposal system in a mannerwhich Involves a knowing and material variation from the terms or specifications contained in the application of permit commits a Class I, Petty Offense ($500.00 fine — 6 months in jail or both). White -APPLICANT Yellow -DEPARTMENT INDIVIDUAL SEWAGE DISPOSAL SYSTEM APPLICATION PERMIT REQUEST FOR Ui �A7S.v stL`t 1Ccx� OWL, 00 NEW INSTALLATION PHONE —70 Li — 'I PHONE�O ( ) ALTERATION ( ) REPAIR Attach separate sheets or report showing entire area with respect to surrounding areas, topography of area, habitable building, location of potable water wells, soil percolation test holes, soil profiles in test holes (See page 4). LOCATION OF PROPOSED FACILITY: Near what City of Town Ck 'h10tNi�4Le SizeofLot 2-1Z 14C'e 5_99g Legal Description or Address Lc1 OkLjeJ WASTES TYPE: W DWELLING ( ) TRANSIENT USE C' da ( ) COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES ( ) OTHER—DESCRIBE BUILDING OR SERVICE TYPE: Number of Bedrooms 7 L ' W;,@ 5 Number of Persons_ ('Z!,j Garbage Grinder Automatic Washer K) Dishwasher SOURCE AND TYPE OF WATER SUPPLY: A-) WELL ( ) SPRING ( ) STREAM OR CREEK If supplied by Community Water, give name of supplier: DISTANCE TO NEAREST COMMIUNITY SEWER SYSTEM: tti►� Was an effort made to connect to the Community System?N/jA A site plan is required to be submitted that indicates the f0110wing MINIMUM distances: Leach Field to Well: Septic Tank to Well: 100 feet 50 feet Leach Field to Irrigation Ditches, Stream or Water Course: 50 feet Septic System (septic tank & disposal field) to Property Lines: 10 feet YOUR INDIVIDUAL SENVAUE DISPOSAL SYSTEM PERiVIIT WILL NOT BE ISSUED WITHOUT A SITE PLAN. GROUND CONDITIONS: Depth to first Ground Water Percent Ground Slope TYPE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED: SEPTIC TANK ( ) AERATION PLANT ( ) VAULT ( ) VAULT PRIVY ( ) COMPOSTING TOILET ( ) RECYCLING, POTABLE USE ( ) PIT PRIVY ( ) INCINERATION TOILET ( ) RECYCLING, OTHER USE ( ) CHEMICAL TOILET( ) OTHER -DESCRIBE FINAL DISPOSAL BY: (�y) ABSORPTION TRENCH, BED OR PIT ( ) EVAPOTRANSPIRATION ( ) UNDERGROUND DISPERSAL ( ) SAND FILTER ( ) ABOVE GROUND DISPERSAL ( ) WASTEWATER POND ( } OTHER -DESCRIBE WILL EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF THE STATE? AJy PERCOLATION TEST RESULTS: (To be completed by Registered Professional Engineer, if the Engineer does the Percolation Test) Minutes per inch in hole No. 1 Minutes inch in hole No. 3 Minutes per inch in hole No. 2 Minutes per inch in hole No. _ Name, address and telephone of RPE who made soil absorption tests: Name, address and telephone of RPE responsible for design of the system: , Applicant acknowledges that the completeness o rthe application is conditional upon such further mandatory and additional tests and reports as maybe required by the local health department to be made and rumished by the applicant or by the local health deportment for purposed of the evaluation of the application; and the issuance or the permit is subject to such terms and conditions as deemed necessary to insure compliance with rules and regulations made, inl'oimation 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 ormy knowledge and belief and are designed to be relied on by the local department orhealth in evaluatin g the same for purposes of issuing the permit applied for herein. I further understand that any falsification or misrepresentation may result in thedenial of the application or revocation ofany peimitgranted based upon saidapplication and in legal action I'orperjury as provided by law.. ..-� Sign4.1 I Date PLEASE DRAW AN ACCURATE NAP TO YOUR PROPERTYN 3 Jeffrey Legacy Homes of Aspen, Inc. 612 Surrey Road Carbondale, CO 81623 RE: As -Built OWS System, Sabo Property, Lot A, County Road 109, Garfield, CO SE Job No. 25254.01 Dear Jeffrey: 17 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. 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 tanks, transport distribution pipe, and absorption field installations are in accordance with Garfield County Regulations, the design presented in the Sopris Engineering design drawing, dated April 14, 2006 and revised March 22 2007. A primary 1500 -gallon dual compartment concrete septic tank and a secondary 1000 -gallon dual compartment concrete septic dosing tank was installed in series with an Orenco duplex biotube filter pump assembly. The duplex dosing pump system is installed in the secondary compartment of the second tank to dose primary treated effluent to the absorption field. The full pressure dosed absorption field was constructed with a total of 72 Quick -4 Infiltrator leaching chambers in a trench configuration with (6) 52 -long trenches containing 12 chambers each. The treatment/absorption field system is configured for alternating pressure distribution over 2 pressure distribution zones (3 trenches per zone) through alternating pumps. The effluent from the secondary tank is distributed by alternating duplex pump assemblies in the dosing/septic tank (pump vault). Each trench has a custom perforated pressure distribution pipe running the length of the chamber row. Three trenches are dosed per each dosing pump cycle by alternating pumps. The dual 1.25 -inch transport lines from each pump is bedded in road base and installed to allow gravity drainage of effluent back to the tank and to the individual distribution zone manifolds respectively on each set of trenches located at a high point at the head of the trenches. All distribution piping, valves and pump assembly components have been installed and are in operation in accordance with the design and performance specifications. The chambers were backfilled with native soil and/or screened rock to the top of the chambers, and backfilled to the finished surface grade with native soil. Each trench was installed level. Inspection ports were installed on each end chamber. The chambers were installed in the native silty sand and gravel with cobbles soils over 6" of concrete sand consistent across the field. The field has two sets of trenches with pressure manifolds and individual split flow tees that connect with the pressurized perforated distribution laterals at the head of each trench. The minimum setback distances have been maintained. The 6 502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311 • Fax (970) 704-0313 SopRis ENGINEERING 0 LLC civil consultants Jeffrey Sabo SE Job No. 25254.01 September 17, 2007 Page 2 trenches have a separation distance of approximately 6 feet and are installed approximately 2 to 3.5 feet 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. A minimum 6 inches of sand was placed in the trenches to mitigate the presence of cobbles and enhance treatment of the effluent. No ground water was encountered in any of the excavations on site. OWS Operation and Maintenance Tlae System shall be inspected on a regular basis and be properly maintained. The system and responsibility for repair and maintenance of the systems will remain with the Owner. The owner shall employ the services of qualified service providers to inspect the OWS and 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 system's health, longevity and need for maintenance include: actual wastewater flows versus design flows, the volume of kitchen/domestic waste (excluding human waste and toilet paper), excessive use of household chemicals, extra strength laundry detergents 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 ENGNEERING, LLC Paul E. Rutledge GARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT 108 8th Street, Suite 401 Glenwood Springs, CO 81601 (970) 945-8212/(970) 285-7972 (ex. 4003) PROCEDURE REQUIRED FOR COMPLIANCE WITH THE GARFIELD COUNTY SEWAGE DISPOSAL REGULATIONS. Step l: Application A. Obtain a standard "Individual Sewage Disposal System" application from the Building and Planning Department, 108 8th Street, Suite 401, Glenwood Springs, Colorado 81601, 970-945-8212 or 285-7972 extension 4003. You may also obtain one off of our website at www.garfield-county.com. B. Return completed application, map to property, site plan and diagram of site to the Building and Planning Department (Pages 2 and 3) and building plans. INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMITS WILL NOT BE ISSUED WITHOUT AN APPROVED BUILDING PERMIT. C. Make check or money order payable to "Garfield County Treasurer" (The cost for the permit fee and percolation test is $150.00 or if a Registered Professional Engineer does the percolation test and design, the cost is $50.00 permit fee). FEES ARE NOT REFUNDABLE. D. Your Individual Sewage Disposal Permit will be issued along with your building permit provided no prohibitive problems are encountered. Step II:Percolation Tests -SEE DETAILED INSTRUCTIONS ON PAGE 6 A Prepare three (3) percolation holes 4 feet deep, 8 to 12 inches in diameter, and 20 feet apart in the area of the proposed leach field area (Instructions for post hole or back hoe holes are on page 4). B. Fill percolation holes with water once for the required eight (8) hour soaking period. C. Request percolation test by Sanitarian. (To avoid construction delay, we suggest arrangements for percolation test be made at least 24 hours prior to the end of the soaking period). Please have at least five (5) gallons of water for each hole available at the site for the percolation test. !!!!IMPORTANT!!!! Please be advised that if the Sanitarian's initial field visit to your property reveals any unusual difficulties such as high water table, excessive percolation rates, bedrock, etc., the services ofa Colorado Registered Professional Engineer and/or Board of Health approval will be required. Step III: Final Inspection A. When all components are in place, connected and ready to cover, request a final inspection by the Sanitarian. B. DO NOT backfill any part of the system prior to the inspection. C. The initial fee covers the percolation test and one inspection before cover up. Any additional percolation tests will be charged at $100.00 each and additional inspections will be charged at $50.00 each. D. Upon final approval, carefully cover the entire system. INDIVIDUAL SEWAGE DISPOSAL SYSTEM APPLICATION OWNER _ PERMIT REQUEST FOR C W- 5 A-T7 NEW INSTALLATION PHONE %o'] —) 7 51) PHONE %U+�U ( ) ALTERATION ( ) REPAIR Attach separate sheets or report showing entire area with respect to surrounding areas, topography of area, habitable building, location of potable water wells, soil percolation test holes, soil profiles in test holes (See page 4). LOCATION OF PROPOSE/D1 FACILITY' Near what City of Town CA% --z r J A- CCFz Size of Lot 42e Legal Description or Address LojA RF `��'6 S�1c}nuJ WASTES TYPE: CXDWELLING ( ) TRANSIENT USE O COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES ( ) OTHER—DESCRIBE BUILDING OR SERVICE TYPE: Number of Bedrooms 1Fu ' i s Number of Persons (� Garbage Grinder Automatic Washer �<) Dishwasher SOURCE AND TYPE OF WATER SUPPLY' WELL If supplied by Community Water, give name of supplier: DISTANCE TO NEAREST COMMUNITY SEWER ( ) SPRING ( ) STREAM OR CREEK SYSTEM: f Was an effort made to connect to the Community System? A site plan is required to be submitted that indicates the following MINIMUM distances Leach Field to Well: 100 feet Septic Tank to Well: 50 feet Leach Field to Irrigation Ditches, Stream or Water Course: 50 feet Septic System (septic tank & disposal field) to Property Lines: 10 feet YOUR INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT WILL NOT BE ISSUED WITHOUT A SITE PLAN. GROUND CONDITIONS: Depth to first Ground Water Percent Ground Slope TYPE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED: (�) SEPTIC TANK ( ) AERATION PLANT ( ) VAULT ( ) VAULT PRIVY ( ) COMPOSTING TOILET ( ) RECYCLING, POTABLE USE ( ) PIT PRIVY ( ) INCINERATION TOILET ( ) RECYCLING, OTHER USE ( ) CHEMICAL TOILET( ) OTHER -DESCRIBE FINAL DISPOSAL BY: (�) ABSORPTION TRENCH, BED OR PIT ( ) UNDERGROUND DISPERSAL ( ) ABOVE GROUND DISPERSAL ( ) OTHER -DESCRIBE ( ) EVAPOTRANSPIRATION ( ) SAND FILTER ( ) WASTEWATER POND WILL EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF THE STATE? >JD PERCOLATION TEST RESULTS: (To be completed by Registered Professional Engineer, if the Engineer does the Percolation Test) Minutes per inch in hole No. I Minutes inch in hole No. 3 Minutes per inch in hole No. 2 Minutes per inch in hole No. Name, address and telephone of RPE who made soil absorption tests: Name, address and telephone of RPE responsible for design of the system: Applicant acknowledges that the completeness of the application is conditional upon such further mandatory and additional tests and reports as maybe required by the local health department to be made and furnished by the applicant or by the local health department for purposed of the evaluation of the application; and the issuance of the permit is subject to such terms and conditions as deemed necessary to insure compliance with rules and regulations made, information and reports submitted herewith and required to be submitted by the applicant are or will be represented to be true and correct to the best of my knowledge and belief and are designed to be relied on by the local department of health in evaluatin g the same for purposes of issuing the permit applied for herein. 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