The URL can be used to link to this page

Home My WebLink AboutSystem Design33 FOUR WHEEL DRIVE ROAD CARBONDALE, CO A1623 970.309.5259 CARLA.OSTBERG@GMAI L. COM Fittl¡'f r(: (--c)Nsf rr-'l' rI\(; March 12,2021 Project No. C1581 Todd and Katie Hundertmark cio Dana Yerian Daybreak Construction davbrea kconstru ction @hotm ai l.com Subsurface lnvestigation and Onsite Wastewater Treatment System Design 4-Bedroom Residence 1',t707 CR 245 Garfield County, Colorado Todd and Katie, CBO lnc. performed a subsurface investigation and completed an onsite wastewater treatment system (OWTS) d'esign for the subject residence. The 82.744-acre property is located outside of New Castle, in an area where OWTSs and wells are necessary. Legal Description: Section: 24 Township: 4 Range: 92 N1/2S8, SESE. EXCEPT A TR OF LAND CONT 37.256 AC +Ë AS DESC IN SWD BK 191 11637 82.744 ACRES Parcel lD: 1923-244-00-019 SITE CONDITIONS The property is currently undeveloped. A 4-bedroom residence is proposed. A private well will serve the residence potable water. The well must be located at least 5O-feet from the proposed septic tank and at least 1O0-feet from the proposed soil treatment area (STA). Additionally, no water line may come within 25-feet of any OWTS component. A dry drainage runs to the southwest of the Buford Road (CR 245). The STA will be at least 25-feet from this drainage. The proposed STA location has an approximate ten percent slope to the souiheast. The area is an open meadow covered with native grasses. 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. SUBSURFACE The subsurface was investigated on December 20,2020 by digging two soil profile test pit excavations (Test Pits). A visual and tactile soi analysis was completed by Carla Ostberg at the time of excavation.l 1 Carla Ostberg holds a Certificate of Attendance and Examination from the CPOW Visual and Tactile Evaluation of Soils Training. Page2 The materials encountered in the Test Pit #1 consisted of medium brown loam to a maximum depth explored of 8.0-feet. No bedrock or groundwater was encountered. The materials encountered in the Test Pit #2 consisted of medium brown loam to a maximum depth explored of 8.O-feet with an approximate 6-inch deep gravel band at approximately 4-feet. No bedrock or groundwater was encou ntered. A sample of the soil was taken from Test Pit #1 at 3-feet below grade. Soil structure grade was moderate. The soilformed a ball and a ribbon less than 1-inch in length before breaking. Soil structure shape was blocky and consistence was friable. Soil texture was both gritty and smooth. STA sizing is based on Soil lype 2, Loam with moderate structure grade. A long term acceptance rate (LTAR) of 0.6 gallons per square foot will be used to design the OWTS. Test Pit #1 Sieved sample Backfill Ribbon less than 1-inch in length Page 3 Test Pit #2 (note gravel band at 4') Backfill DESIGN SPECIFICATIONS Desion Calculations: AverageDesignFlow=T5GPDx2people/bedroomx3Bedrooms+75GPD(4mbedroom)=525GPD LTAR = 0.6 GPD/SF 525 GPD / 0.6 GPD/SF x 1.0 (gravity trenches) x 0.7 (chambers¡ = 613 SF The OWTS design is based on 4-bedrooms. An average daily wastewater flow of 525 GPD will be used For the purposes of this OWTS design, Benchmark Elevation has been established at Finished Floor of the residence as 100'. The sewer line will exit the foundation at approximately 98'. 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 The 4-inch diameter SDR-35 sewer line exiting the residence must have a double-sweep clean out and a minimum 2o/o grade to the septic tank. OWTS Component Minimum Elevation Primary Tank lnlet lnvert Approximate horizontal distance 13' / min. 2o/o fall to septic tank / min. 3.25" fall Distribution Box Approximate horizontal distance 55' / min. 1% fall to distribution box / min. 6.9" fall lnfiltrative Surface Approximate horizontal distance to furthest trench 35'/ min. 1o/ofall / min.4.375" fall Page 4 The system installation must include a 15OO-gallon, two-compartment lnfiltrator@ poly septic tank with 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 13 'Quick 4' Standard Plus lnfiltrator@ chambers for a total of 52 chambers and 624 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. COM PON ENT SPECIFICATIONS The component manufacturers are typical of applications used by contractors and engineers in this area. GBO 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. INSTALLATION 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. I N STALLATION 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. COMPONENT lrunruurlcruRER MODEL NO lcorurvlerurs Septic Tank llnnnratoro rM-1530-2CP l1 s00-gallon, 2-compartment lpoly septic tank Biotube Effluent Filter lorenco@ lfutt Size Effluent Filter and lhousing Tank Risers and Lids lorencoo lDouble-walled PVC Risers and [ior 1z+" diameter) I Distribution Box leotvt-ot< lDistribution box, flow equalizers l(4), risers, lid Chambers fnnttratoro Standard Plus lsz 'Qu¡ct 4' Standard Plus lchambers Page 5 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 paôt<et. Photogiaphs of the installation and final cover are also requested to supplement our installation documentation. REVEGETATION REQUIREMENTS An adequate layer of good quality topsoil capable of supporting revegetation shall be placed over the entire disturbed area of the OWTS installation. A míxture 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, altemating 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 additionalwater 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. 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. Page 6 LIMITS: The design is 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 Gontractors may be required by county regulation. Please call with questions. Sincerely, CBO lnc. (Åh(a-üxþx"" Carla Ostberg, MPH, REHS r-l ð cBO lnc.33 Four Wheel Þrive RoadCarbondale, ColoEdo 81623Phone 970.309.5259carla.ostberg@gma¡1.æmHundertmark Residence'11707 CR245Garfield County, ColoradoProjectNumber: C1581Datei 031121202'lDesigned by: CBODrâwn by: DDw1 .0Sheet I 0F 4NCnlÐÌ.)l-¡SCALE: 1 = 100'=0"Cattle GuardPROPOSED4.BEDROOMRESIDENCEMIN.25'TO DRY DRAINAGE2ALONG THE BUFORD ROAOTP1IIIIIIØoC)oolÐDRAWINGS MUST BE USED INCONJUNCTION WITH DESIGNLETTER DATED 03 11212021 CBO lnc.33 Four Wheef Drive RoadCarbondale, Colorado 81 623Phon€ 970.309.5259carla.ostberg@gmail.comTMTOR'outcK4'4" ÞIA SOR-35 SEWERLINE TO EACH TRENCH(MlN. 1 0/6 SLOPE TOTRENCH)4' DtA SDR-35ÊFFLUENT PIPÊ FROMSEPTIC TANKEND PUECHAMBER (4'x 3')DISTRIBUTION EOXWITHAT GMDEDIASDR-35PLACED INiNSPECTIONPORT4',TOP PORÎOFCHAMBER ENDPLATES,T-sotLLIMITEXCAVATIONSCARIFY'QUtoK-4',CHAMBER (a'x 3')4" DIA SDR-35 INSPECÎONPORTAT BEGINNING ANDENO OF EACH TRENCH/À CHAMBER 1RENCH SEC'IIOilI\gr__--...-ñræACHAMBER 'IRENCH PLAN\.rr-fFEVIVE COVERFINISHËDBOX OR IRRIGATIONVALVE BOX AT GRADEBOX AND COVER BROUGHT TO GRADECAP OR THREADEDcoNcRElELlD--1CLEANOUT ASSEMBLY4" DIA SDR-35 SEWERfficffiE-COMPACT(MlN 2016 SLOPE 10 TANK,MrN. 1% TO SrA)BASE TO SUPPORTBOXPVC PIPE CUÌ TOFnUSECUTËNDHOLE SAW TOÎHRU TOP OFSCREENEDOR SAND FORBEDDING3" MlN.BAFFLÊ ORANGLED PIPÊTO BE USEDMIN.AT INLET/iDISTRIBUlION BOX\9t-1tJ7lræATRENCH DETAIL\?'-ñr@/ì DISIRIBU'IìON BOX DEIAIL\3/='-nr@1 3 CHAMBERS PER TRENCHBACKFILLOUTLETSoooo ll=Hundertmark Residence11707 ÇR245Garfield County, ColoradoProjectNumber: C1581ll*o: ost1zt2o21loe"¡gne¿ ov, ceolDrawn bv: DDw3.0Sheet 3 0F 4 CBO lnc.33 Four Wheel Drive RoadCarbondale, Colorado 8'1623Phone 970.309.5259carlâ.ostberg@gmail.comDESIGN4.BEDROO¡I RESIDENCE75 GPD x 2 PERSONS/BEDROOM x 3 BEDROOMS + 75 GPD (4Th BEDROOM)SLIP.ON PVCWASTEWATER FLOW = 525 GPDSTA TO DRY DRAINAGE2530'STA TO WELLr00'105'STA TO HOUSE20'87'SEPÍIC TANK TO DRY DRAINAGE25',120'SËPTIC ÏANK IO WELL50'9t'HOUSE TO SEPTIC TANK11',OWTS COMPONENTSANOPHYSICAL FEATURESMINIMUM REQUIREDSFTBACKAPPROXIMATE PROPOSEDSETBACKDO NOT GLUETANK:MIN. 1250 GALLONSUSE 1sOO.GALLON, TWO-COMPARTMENT POLY SËPTIC TANKINSULATEDTRACER WIREFINISHÊD GRADESOIL TREATMENT AREA (STA):LONG TERM AC0EPIANCE RATE (LTAR) = 0.6 GAU SFCALCULAÎËD SrA - Q/LrAR = 525 / 0.6 = 875 SFGRAVlry, TRENCHËS = 875 SF X 1.0 = 875 SFCHAMBERS = 875 SF X 0.7 = 613 SF / 12 SF / CHAMBER = 51 CHAMBERSFOUR GRAVELLESS CHAMBER TRENCHES13'QUICK 4' CHAMBERS IN EACH TRENCHTOTAL 52 'OUICK 4' CHAMBERS4" DIASEWER LINETO TANKHOUSE/:\CLEAN OUT DETAILL!--'--rr6æSOIL PROFILE TEST PIT NO. 1SOIL PROFILE IEST PIT NO.2-0-1-,-3MEDIUM BROWN LOAMMEDIUM BROWN LOAMFUULTFÈuô¡-¡TL¡lt467I10GRAVËLLY BAND FROM 4 TO 4.5-FEETNO GROUNDWATER OR BEDROCK ENCOUNTEREDDURING EXCAVATION/A SOILS LOG\r,-rTæLEGEND[i] ro"'ffi stu"tHundertmark Residence11707 CR245Garfeld County, ColoradoProjectNumber: C1581Date: 03/12i2021Designedby: CBODDDrawnby:w4.0Sheet 4 0F 4 CBO lnc.33 Four Wheel Drive RmdCarbondale, Colorado 81623Phone 970.309.5259carla.6tbèrg@gma¡l.comPROPERTYN4' DIA SDR-35 SEWER PIPE WITH CLEANOUTMIN 2% FALL TO TANKÞsOO-GALLON, TWO.COMPARTMENT\SEPTIC TANK WITH EFFLUENT SCREENSCALE: l" = 20'{"\\TP24' DIA SDR-35 PVC SEWER LINE(MrN. 1% FALL TO D-BOX)4' DIA SDR-35 INSPECÏION PORT ATBEGINNING AND END OF EACH TRENCH\DISTRIBUTION BOXWITH ACCESS AT GRADE'QUICK.4' CHAMBER TRENCHES.4 TRENCHES WITH 13 CHAMBERS PER TRENCHFOR A TOTAL OF 52 CHAMBERS AND624 SF.4' DIA SDR.35 SEWER LINE TO EACH TRENCH-{MrNr. 1%SLOPE TO TRENCH),/ t\\\PROPOSED4-BEDROOMRESIDENCEFF BM 1OO'Hundertmark Residence11707 CR245Garfield County, ColoradoProjectNumber: C1581Oale: 0311212021Designedby: CBODDDrawnby:w2.0Sheet 2 0F 4 UäËffio6EqãgEüE8lx;8rgÊ.tffiIMPROVEMENT LOCATION CERTIFTCATEA Parcel of Lønd Situated in t?rc SE,l/ 4Section 24, Totunship 4 Soutl6 Rarrye 92West of tltÊ 6th P.M., Countg of Garfield,Støte of ColoradoPROPþRTV DESCRTPNÔNA PÆ& OF W WAM N M æ 1/ 4 @ SffiON 24, TOWW 4jffiN@vw@ÆffiPM, wPl@wÙa¡@PMM!D6wÐÆwwglffiAîwlw qJMÊ@¡ÆoFffiNz4, AWBMsæ4%æiw@ Ðw @v'42' w@rc æ Mv@ o¡wwoN 24 A WNæ OF 1522.11 W rc A rcW ON æ @OF æWROÐ NO.245 M @WM NPUCÈMN@ MNoW @WW OFWWffi¡@WWß9)@W:r.) MNo rc ßc oF A w rc ffi w øwa A wM oFtm.æ wl, N MæNffiOî 206.02 W (æOÐarc N40'eO7W205.80Wn2) MNO rc ÆC OF A MW rc W NGffi %WG A W 01æ.45:ffi, N &øÍOWOF lg.Jg FM (øOÐBÆN432511vtg,@w);3) MNG W & @ A MW rc W W MWQA W @ 7æ.æM, ñ & WW OF 1%27 W (æ@ W N 5"5'æ" W tg.reFWII;4.) N94747 537.95FWjs) N 6.A'ts'w 363.@ W\û MNG m ÆC OF A MW rc ffi HOt MWO A Wre OF2A-@W, N &úW OF 147.75 W (æON W N 473725W14543FÈT):7.) N8.5EtvW71.2t W;Ð MNO ffi æ OF A MW rc re W ÆW A Wre 6 m.&w, N Æcwoffi@ 81.14W(q@MN æ'4126W æ.68FEÐ);9.J MA W ÆC OF A MW rc M W MWç A Wre OF ffi.36w, N ÆcM Ø t2o.2oM (c$oþ BÆN æY119'w 119,71Fæ*to.) MNe ñ Æc æ A w þ M w MWGÁM O¡6æ36w, Æ N M Ø tû.10w (w@ w N 792'J2'w 159.72 FEE i1 1-) N æ)644' W I I 5,26 FøT;12.) N7641',fi'W59.47W;I 3.) N 52v6'2q' W 1 213 t Fet7l,14.) N 41.æ27 W 77.43 îEtll'5,) MNO M æ OF A MW rc M W MW A WÆ OFt@.@w¡, N Æ æNffi OF 95.61 W lØOþM N 55'*'31',Wg.2O tEE4i16.) Nß%'39"WæA.13W417.) N 7A57 *', W 9A.O I FE9T:1q Mro w Æc oF A ww rc w NGfr ilw A M @&.@ w, N Æc wffi 6 1l4.ol wî lu@ M Ñ 69w'52',w 1 13.45 FEü);19.) N 57.14'43' W 71.70 W rO A W ON M N(ruY W OFwæ1/4 Ø êærcN 24;w@Ml;jJ¡,lffiellÆoFs8ÆN 24NWw ß No.36726ÐN Wæ W S 695zra'rá M@ 649.14 ?EEllwæ N 89'57'1A' E Mre W @væ¿ M@ OF2s92ØWrcrcWrcMæMAæì:mO¡l::|¡,¡.j@,sreOF@WWGRÄPI¡IC SCAIEæ{re)trú1/4tutuúA@tuC41^tuIÈKwell4tuW* ^a@tu@htu /lO----. ,' tl/vwt/4tutuxAÑþfuC4bfuWPROVEMEM IÐCANON CERNPIC¡TAIWWMTrcWWWWMW4æWAS,@,@rcR W&M@W @WM,MT EENØA/ÆWW%TORNWWWY%T ææ1tr6folDÆjlil|ii@ @IM1ÆWM6Wæ, WG,OR@ffiWWM.@&wD6W?M8MW@WNgu@üwÆgcfo¡ÆüwÆN@.MW¡M. NO. %5nDETNL SCALE: 1"4O' ÇqPuHic.net* Garfield CountY, CO Physical Address Owner Address 81652 2019Total Actual Value Overview Legend f] Parcels Roads Parcel/Account Numbers Highways ¡:s LimitedAccess - Highway ' - Major Road " ' Local Road --'MinorRoad Other Road Ramp -* Ferry Pedestrian Way Owner Name ffi Lakes&Rivers * CountyBoundary Line $24A70 Last2Sales Date Price 6/7t/20r8 $320,000 B/18/2Or7 $28s,000 Account Number Parcel Number Acres Land SqFt TaxArea 2019 Miil Levy R015023 7923244ÆÆoL9 83 0 015 67.O5Æ 11707 24sCOUNry RD SILT 2011TAD D HUNDERÏMARK REVOCABLETRUST 295 UPPER RANCH ROAD ASPEN CO 81ó11 D ate cr e ated: 3 / 72/2O21. Last Data U ploaded: 3/72/2O21 227:07 AM Deve roned bv Gl F."Fgnrdçt