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Home My WebLink AboutOWTS Report] 29 CAINS LANE CARBoNDALE, CO A1623 970.309.5259 cARLA. oSTBERG@GMAI L. COM sitìl>'t'r (' ( :()Nsif i ¡,'r'I :i(; July 12,2021 Project No. C1631 Mike Thompson Mjthompson 1 980@qmail.com Subsurface lnvestigation and Onsite Wastewater Treatment System Design 4-Bedroom Addition to Existing 1-Bedroom Cabin 477 CR 112 Garfield County, Colorado Mike, CBO lnc. performed a subsurface investigation and completed an onsite wastewater treatment system (OWTS) design for the subject residence. The 6.645-acre property is located outside of Carbondale, in an area where OWTSs and wells are necessary. Legal Description: Section: 23 Township: 7 Range: 88 A TR lN NWSE SEC 23 Parcel lD: 2393-234-00-361 SITE CONDITIONS A 1-bedroom cabin and detached garage with a toilet exist on the property. A 4-bedroom addition is proposed between the two existing structures. The existing OWTS will be abandoned. There are several septic permits available online associated with this property. One from 1981, one from 1987, and another from 1992. The existing septic tank sits between the two structures and will be removed, and the existing soil treatment area (STA)will be abandoned in place. The residence will be served by a private well on the property located to the north of the existing structures. The water line enters the back (north side) of the structures and will not come with in 25-feet of any OWTS component An irrigation ditch bisects the property from northeast to southwest. The irrigation ditch is placed in a 24- inch diameter culvert nearly at the ground surface. The new sewer line will cross the irrigation ditch UNDER the culvert. The sewer line must be encased at least 10-feet on each side of the crossing (See Encasement Detail W4.0/1 ). The proposed STA location has an approximate ten percent slope to the southeast. The proposed area is vegetated with native grasses and sage. There should be no traffic or staging of material over the future STA site to avoid compaction of soils prior to construction of the STA. Page2 SUBSURFACE The subsurface was investigated on June 22,2021 by digging two soil profile test pit excavat¡ons (Test Pits) A visual and tactile soil analysis was completed by Carla Ostberg at the time of excavation.l The materials encountered in Test Pit #1 consisted of dark brown topsoil to 1.O-foot, underlain by tan calcareous clay matrix to a maximum depth explored of 7.O{eet. No bedrock or groundwater was encountered. The materials encountered in Test Pit #2 were similar to those encountered in Test Pit #1. The test pit was excavated to a maximum depth explored of 7.O-feet. No groundwater or bedrock was encountered. A sample of the soil was taken from Test Pit #1 at 3-feet below grade. Soil structure grade was moderate. A sieved sample of the soil formed a ball and a ribbon less than 1-inch in length before breaking. Soil structure shape was blocky and consistence was friable to firm. Soil texture was more gritty than smooth. STA sizing is based on Soil fype 2 with moderate structure grade. A long term acceptance rate (LTAR) of 0.6 gallons per square foot will be used to design the OWTS' View of test pits from deck of existing cabin ' Carla Ostberg holds a Certificate of Attendance and Examination from the CPOW Visual and Tactile Evaluation of Soils Training. Page 3 Test Pit #1 Test Pit #2 Backfill Page 4 l. .l 'l Ribbon < 1"Sieved sample DESIGN SPECIFICATIONS The existing septic tank will be pumped and removed. The existing STA will be abandoned in place. Desiqn Calculations: Average Design Flow = 75 GPD x 2 people/bedroom x 3 Bedrooms + 150 GPD (4th and Sth Bedrooms) = 600 GPD LTAR = 0.6 GPD/SF 600 GPD / 0.6 GPD/SF x 1.0 (gravity trenches) x 0.7 (chambers) = 700 SF The OWTS design is based on S-bedrooms. An average daily wastewater flow of 600 GPD will be used For the purposes of this OWTS design, Benchmark Elevation at grade 6820' (finished floor of existing cabin) has been established as 100'. The sewer line will exit the cabin at approximately 9B'. CBO lnc. should be notified of any discrepancies or problems with grade elevations of proposed components during installation of the OWTS. *Elevations are based upon standard OWTS installation practices. Component elevations may change during installation due to site conditions. OWTS Component Minimum Elevation Primary Tank lnlet lnvert Approx. horizontal distance 61' from garage and 51'from cabin / min.2o/o fall to septic tank / min. 15.25" fall and 12.75" fall respectively Distribution Box Approx. horizontal distance 52' I min. 1% fall lo distribution box / min. 6.25" fall lnfiltrative Surface Approx. horizontal distance to closest trench 5' / min 1o/o fall/ min. 0.625" fall Page 5 Elevations should be shot in advance of component installation to allow the sewer line between the septic tank and distribution box to cross under irrigation ditch at approximately 3' below native grade, with the sewer line extending at the minimum 1o/o fall beyond the irrigation ditch to maintain a shallow installation of the STA. The sewer line exiting the cabin and the garage must have a double-sweep clean out and a minimum 2% grade to the septic tank. The sewer line from the garage should enter the sewer line from the cabin with a "wye" fitting just before the septic tank. The system installation must include a 15OO-gallon, two-compartment lnfiltrator@ poly septictankwith an effluent filter on the outlet tee. Risers must bring the manhole lids to grade for access. lf more than one riser is added to the septic tank, an extension handle must be installed on the effluent filter. Effluent will gravity flow to a distribution box, and then to four gravelless chamber trenches. The distribution box must be accessible from grade and must have flow equalizers, or similar product, installed on each outlet pipe in the distribution box to assure equal flow to each bed. Each trench will consist of 15'Quick 4'Standard Plus lnfiltrator@ chambers for a total of 60 chambers and 720 square feet of infiltrative area. There must be at least 4-feet of undisturbed soil between each trench. lnspection ports must be installed at the beginning and end of each trench. Ports may be cut to grade and placed in sprinkler boxes for access. COMPONENT SPECIFICATIONS The component manufacturers are typical of applications used by contractors and engineers in this area. CBO lnc. must approve alternative components prior to installation of the OWTS. Requests must be submitted, in writing, to our office for approval prior to installation. Component technical data sheets are available upon request. Construction must be according to Garfield County On-Site Wastewater Treatment System Regulations, the OWTS Permit provided by Garfield County Building Department, and this design. ¡NSTALLATION CONTRACTOR CBO lnc. expects that the installer be experienced and qualified to perform the scope of work outlined in this design. The installer must review this design thoroughly and coordinate with our office in advance of installation. Any additional conditions in this design or county permit must be completed and documented prior to final approval of the OWTS installation. Communication between the installer and this office is expected throughout the installation. COMPONENT MIANUFACTURER MODEL NO ICOMMENTS Septic Tank nfiltrator@ rM-1530-2CP l1 500-9allon, 2-compartment lpolv septic tank Biotube Effluent Filter Crenco@ lFull Size Effluent Filter and lhousinq fank Risers and Lids )renco@ lDouble-walled PVC Risers and ll¡0. (z¿" diameter) I Distribution Box PolyLok loistribution box, flow lequalizers, risers, lid 3hambers lnfiltrator@ Standard Plus 160 'Quick 4' Standard Plus lChambers Page 6 I NSTALLATION OBSERVATIONS CBO lnc. must view the OWTS during construction. The OWTS observation should be performed before backfill, after placement of OWTS components. Septic tanks, distribution devices, pumps, dosing siphons, and other plumbing, as applicable, must also be observed. CBO lnc. should be notified 48 hours in advance to observe the installation. ln an effort to improve the accuracy of the record drawing, we request that the installer provide a sketch of the installation, including path of the sewer lines, water line installation (if applicable), septic tank location, STA location, and measurements from building corners or another fixed objects on the property. This sketch is most easily provided on Sheet W2.0 of the OWTS Design Packet. Photographs of the installation and final cover are also requested to supplement our installation documentation. REVEGETATION REQU IREMENTS An adequate layer of good quality topsoil capable of supporting revegetation shall be placed over the entire disturbed area of the OWTS installation. A mixture of native grass seed that has good soil stabilizing characteristics (but without taproots), provides a maximum transpiration rate, and competes well with successional species. No trees or shrubs, or any vegetation requiring regular irrigation shall be placed over the STA. Until vegetation is reestablished, erosion and sediment control measures shall be implemented and maintained on site. The owner of the OWTS shall be responsible for maintaining proper vegetation cover. OPERATION INFORMATION AND MAINTENANCE The property owner shall be responsible for the operation and maintenance of each OWTS servicing the property. The property owner is responsible for maintaining service contracts for manufactured units, alternating STAs, and any other components needing maintenance. Geo-fabrics or plastics should not be used over the STA. No heavy equipment, machinery, or materials should be placed on the backfilled STA. Machines with tracks (not wheels) should be used during construction of the STA for better weight distribution. Livestock should not graze on the STA. Plumbing fixtures should be checked to ensure that no additional water is being discharged to OWTS. For example, a running toilet or leaky faucet can discharge hundreds of gallons of water a day and harm a STA. lf an effluent filter or screen has been installed in the OWTS, we recommend this filter or screen be cleaned annually, or as needed. lf the OWTS consists of a pressurized pump system, we recommend the laterals be flushed annually, or as needed. The homeowner should pump the septic tank every two years, or as needed gauged by measurement of solids in the tank. Garbage disposal use should be minimized, and non-biodegradable materials should not be placed into the OWTS. Grease should not be placed in household drains. Loading from a water softener should not be discharged into the OWTS. No hazardous wastes should be directed into the OWTS. Mechanical room drains should not discharge into the OWTS. The OWTS is engineered for domestic waste only. ADDITIONAL CONSTRUCTION NOTES lf design includes a pump, weep holes must be installed to allow pump lines to drain to minimize risk of freezing. The pump shall have an audible and visual alarm notification in the event of excessively high water conditions and shall be connected to a control breaker separate from the high water alarm breaker and from any other control system circuits. The pump system shall have a switch so the pump can be manually operated. PageT Excavation equipment must not drive in excavation of the STA due to the potential to compact soil. Extensions should be placed on all septic tank components to allow access to them from existing grade. Backfill over the STA must be uniform and granular with no material greater than minus 3-inch. LIMITS: The design ís based on information submitted. lf soil conditions encountered are different from conditions described in report, CBO lnc. should be notified. All OWTS construction must be according to the county regulations. Requirements not specified in this report must follow applicable county regulations. The contractor should have documented and demonstrated knowledge of the requirements and regulations of the county in which they are working. Licensing of Systems Contractors may be required by county regulation. Please call with questions. Sincerely, CBO lnc. (ø"n[,+ tstbu.g Carla Ostberg, MPH, REHS lr t '.1 OARFIELD TNDTvTDUAL sgwAcE DrsposAl pERMrr Ng 'itptZ Larry Flucr DEPAFTùIÊNT Thl¡ does not conslltule å or usê pennll, i,l Owncr ffi 0477 C¡R, ll2)C¡tbö¡¡drlaSyrtem Locetion $*c Oollf¡*L¡c6ns€d lnstållor ' Condition L Construction approvål is h¿reby gränted for t ,bÒ.à t n,uon Ñ Septic Tank or -Aerated treatmsnt unit. Absorption area (or di¡per¡al ôreal computed as follow¡ Perc tate of ohe'inêh Therefore the no. ol ft. of abrorption ôrer per bedroom /'¡ t, "þii?oñ ¡roa. '{, ...'', ,44 .:t'... f' t \IMay wa ¡uggôlt: Date /.¿lnspector FINAL APPROVAL OF SYSTËM No ¡y¡tem shatl be deemed to be in compfiance with the Sewaç Dirposal Laws until the assembled $y¡tern is approved pr¡or lo covsr. ing any part. Septic Tank access lor inspectíon and cleaning within I 2" of ground surface or ¡erated åccess port$ above groundgurface, , Proper materials and assemblv. ,Ífr,( ,¿'-Tr¡de name of septic tank or aerated treâlment unit. /(y-ra+¿J, '... r ' -') Ad¿quate absorption (or dispelsal) a¡ea. 13 pcs ^T,r¡ ltTltÍTôR Date .CONDITIONS: Adequatê compl iance wi th porm i t requ irlments. Adequate cornpliance with County and Srate regulations/requirements. Other 'qt ,7'(, '' i¿'¿l'lnspector RETAIN WITH RECEIPT RËCORDS AT CONSTRUCTION SITE t. Aillnstrlletlonmu8toomplywlthall requlromontEoltheþloradoStâtoBoardolHöâlthlndlvlduålsewageDlsposal Syrtemr Chaptor 2ö, Arllcl€ l0 C.R.8. 1973, REvleed 1984. ,i 2. Thl¡ psrmlt ls yrlld only for connectlon to Btruotutþú wh¡ch have fully aompllod wllh Oounty zonlng and Þulldlng roqulromontr, Qonneetlon lo oÍ uos wlth any dwolllng'br Blructuros not approvod by tho Bulldlng ând Zonlng offlcô 3hâll automallcally bo a vlolatlon ot e råqulrêmont ol lho pqrmlt ånd cauôo lor both legtl acllon and rovocrllon of tho pormll. 3. Any peraon who construclå, allôr8, or lnstalls sn lndlvldual Bowage dlspos¡l systsm ln a manner whlch lnvolvss a knowlng and materlal varlatlon lrom thstermsorspsclfioallone cQntâlned Inlhoappllcåtlonolpermllcommlt8âClåBs I, Pstty OlfenB€ (tı00.00 llno - E monthe ln fall or bolh,). ApÞllcânt. Grr.ñ çopy Dapartmañt: Plnk Copy a Âppl Ìca ti on Approval by County 0fflcial:INDIVI AL STt,lAGE I SPOS SYSTEH APPI.ICATI á--0llN ADDRESS #¡go 0o NE 1ó 3- 6Qzl CONTRACTOR-arc-t¿#-- ADDRESS PHONE PERMIT REQUE$T FQR: (X new Installation ( ) Aìteration ( ) Repair Attach separate sheets'or report shov¡ing entïre area with-respect to surrou topography of area, habìtabtä building, loc.ation of potable water wells, so teit-troiei, sojì profÍìes in test holes. (See page 4.) nding areas,il percolation tsiz"2,fA(ÆSIOFP Near what Gi tY of Tow F County /æu Lo Legal Descriptio I,IASTES TYP BUILDING OR STRVICE TYPE: Á) Dwelling ) Conr¡nercial or InstitutÌonal ( ) Transient Use ( ) Non-domestic l^lastes ( ( ( Number of bedrooms 3 ( ) Garbage grÍnder ().{Automatic washer (() Djshwasher Number of persons L s0u$c-q. AND TYPE.0i.!,l.AJtR -s-ufPLY: ('( ) wetì ( Glve depth of all wells within 1S0 feet of system: If supplted by communlty water, gìve nanìe 0r supplier:o GROUND CONOITIONS (Depth to bedrock: ) spring ( ) stream or creek Depth to flrst Ground tlater Tabìe:? Percent ground sìoPe: .1 DISTANCE TO NEAREST COMMUNITY SENER SYSTEI4: Wasaneffortmadetoconnecttoconntunitysysteln?..,.-.....-# TYPE OF INDIVIDUAL SEHAGE DISPOSAL SYSTEM PROPOSED: ( )¿I septlc Tank ( ) Vault PrivY ( ) Pit Privy ( ) Cnentlcal Tol'let FINAL DISP OSI\L BY: l-[ nbsorption Trench, Bed or Pìt ) Underground DisPersal ) Above Ground Dí sPersal ) Aeration Plant ) Composting Toiìet ) Incineration Toilet ( ) Vault ( ) Recycllng, Potable use ( ) Recyctlng, other use ( ( ( ( ( ( ( ( ) Other - Describe: --. -. - ( ) tvapotranspiration ( ) Sand Filter ( ) l,l¡stewater Pond ) 0ther - Describe: I.IILL EFFLUENT BE DISCHI\RGTD DIRECTLY INTO hIATERS OF T}IE STATE?41f 'r- , SOIL .PE TEST RESULTS: (To be conrpleted by Registered Professional Engineer.) Ml nutes per inch in hole No. 1 MÍnutes per inch'ln ho'le No.3 14i nutes Nante, address and telephone of RPE who rrtade soil absorption tests: Name, address and telephone of RPE responsibìe for design of the system: Jury as provided by law. Date Si gned PLEASE DRA}I AND /\CCU MAP TO YOUR PROPERTY Appllcant acknowledges that the completeness of the appllcation is conditional upon such tili.,ttrer mandatory añ¿ adaltional telts and reports as may be. requ'lred by the.local health dÀpaitment to be-made and furnished by the applicant or by the local health department for pui.poses of the evaluation of the appllcation; and the 'lssuance of the. pormllt, i's subJect to luch tèrms and conditlons as deemed'irecessary to in$ure compìlance wlth rules and regulatlo_ns adopted under Artlcle 10, TÍtle 25, C,R.S. 1973, as amended. The underslgned.hereby certlfles that all statements made, lnformation and reports submitted herewith and required to be submltted by the applfcant are or will be represented to be true and correct to the best oi my knowtä¿ge anä'betief and are clesigned to be relied on by.the local.department of health in evaluating the sane for purposes of issulng the permlt app!led for herein. I funther under- sland that añy falsificatioir oi. misrepresentaiion mày resull ln the denlal of the appllcatlon or revocatfon of any permit granted bàsed upon sald applìcation and in legaì action for per- I I \ I \ (ca /lae, Ir .75 lousc i. "r :,r oo Drrr¡ ? <-..-.---¿- ÐqPrtHic.net* Garfield County, CO 477 112 COUNTY RD CARBONDALE THOMPSON FAMILY TRUST. M ICHAEL J & SUSAN 477COUNTY ROAD 112 CARBONDALE CO 8T623 87623 2019 Total Actual Value Overview Legend I Parcels Roads Parcel/Account Numbers Highways - Limited Access - Highway " Major Road '' Local Road ' Minor Road Other Road Ramp -- Ferry Pedestrian Way Owner Name ! i Lakes&Rivers - CountyBoundary Line $ó58,090 Last2Sales Date Price 2/74/2014 $O 2/14/2Or4 $O Account Number Parcel Number Acres Land SqFt Tax Area 2019 Milt Levy R717965 239323400361 7 0 011 75.5380 Physical Address Owner Address D ate cr e ate d: 7 / 29 / 2O27 Last Data Uploaded: 7 /29/2027 2:08:37 AM Deve ro ped nv ¡!) p.chneider 7t29t2021 qPublic.net - Garfield County, CO - Property Record Card: R111965 fÐqPublic.net* Garfield County, CO Summary Account Parcel Property Address Legal Description Acres Land SqFt Tax Area Mill Levy Subdivision R1119ó5 239323400367 477 T12COUNTY RD, CARBONDALE,CO 87623 Section: 23 Township: 7 Range: 88 ATR lN NWSE SEC 23. 6.645 0 77 75.5380 View Map Owner THOMPSON FAMILYTRUST- MICHAEL J &SUSAN 477 COUNTY ROAD 112 CARBONDALE CO 81ó23 Land Unit Type Square Feet Buildings ActualValues Assessed Year Land Actual I mprovement Actuâl Totâl Actuâl Assessed Values Assessed Yeâr Land Assessed lmprovement Assessed Total Assessed Tax History SINGLE FAM.RES,-LAND - 1112 (RESIDENTIAL PROPERTY) 0 Building # Units BuildingType Abstract Codes / (Property Type) Architectural Style Stories Frame Actuâl Yeâr Built Basement Area Finish Basement Area Gross Living Area Total Heated SqFt Bedrooms Baths HeâtÌng Fuel HeatingType Aír Conditioning Roof Type Roof Cover 7 7 SFR SI NGLE FAM,RES-I MPROVEMTS-1212 (RESI DENTIAL PROPERTY) 1 1/2 STRY 2 WOOD FRAME r99t 520 400 ó80 1,080 7 I ELECTRIC ELEC BS BD NONE RIDGE FRME PREFAB MET Tax Year Taxes Billed 2027 $27s,000.00 $383,090.00 $ó58,090.00 2027 $19,óó0.00 $27,390.00 $47,050.00 2019 $3,ó93.84 2020 $27s,000.00 $402,970.O0 $677,970.OO 2020 $19,óó0.00 $28,810.00 $48,470.OO 2078 2079 $275,000.00 9402,910.OO $677,970.00 20L9 $19,óó0.00 $28,810.00 $48,47O.OO 2077 $2,987.24 2020 $3,661".32 $3,118.84 Click here to view lhe tax information for this parcel on tne Cat¡e https://qpublic.schneidercorp.com/Application.aspx?ApplD=1038&LayerlD=22381&PageTypelD=4&PagelD=9447&Q=109 611227 &KeyYalue=R111965 1t3 7t29t2021 qPublic.net - Garfield County, CO - Property Record Card: R111965 Book Sale Price Grantor $O THOMPSON, MICHAEL J-TRUSTEE; THOMPSON, SUSAN G-TRUSTEE $0 THOMPSoN, MICHAEL J; THOMPSON,SUSAN G $o Grantee THOMPSON FAMILYTRUST THOMPSON FAM ILY TRUST: THOMPSON, MICHAEL J-TRUSTEE;... THOMPSON, MICHAEL J & SUSAN G FLUER, LARRY LOUIS & BARBARA LEE TRUSTEE Transfers Sale Date 2/14/2014 2/t4/2074 6/29/2006 9/7/2005 9/7/2005 5/22/2003 5/22/2003 s/22/2003 17/77/1986 Deed Type Statement Of Authority Special Warranty Deed EASEMENT STATEMENÏOF AUTHORITY WARRANTY DEED SPECIAL WARRANTY DEED SPECIAL WARRANTY DEED STATEMENTOF AUTHORITY Deeds Reception Number 846s42 846547 70797r 68?t38 681-903 629r57 628868 628867 Page 7820- 766 1726- t78 7725- 77 7479- 470 1478- l5J 7478- t32 0699- o32t $o $495,000 FLUER, LARRY LOUIS & BARBARA LEE TRUSTEE $O FLUER, LARRYL.&BARBARAL. $o $o $o Photos Sketches https:/iqpublic.schneidercorp.com/Application.aspx?ApplD=1038&LayerlD=22381 &PageTypelD=4&PagelD=9447&Q=109611227 &KeyValue=R111965 213 7t29t2021 qPublic.net - Garfield County, CO - Property Record Card: R111965 34', WBA 650 sf 5' 3', {;lr r, r!)i I ìf 3Ll:ìi ;1i rii I (i Usçr Privacy Policy GDPR Privaçy_Ng!çg LastDatajp.þ9gl:fl29l1O]j;!/pþ37iNv! \/t. irÌ' L l.J i 'r!1-' -o 0.) fla\ el,:ipr'ir ll\' C)F."å'g,.qdçr 9uàoLoo- LL 5' bñt 1z', OHB 24O sf 14', oc\ OWB 280 sf https://qpublic.schneidercorp.com/Application.aspx?ApplD=1038&LayerlD=22381&PageTypelD=4&PagelD=9447&Q=109611227 &KeyValue=R111965 313