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Home My WebLink AboutOWTS Report 01.16.2023{:rã{},.I29 CAINS LANE CARBoNDALE., CO A1623 970.309.5259 RtrCE¡VFN} GAI:¿Í:'i:il rl (, í : ,,. C0lüllvlUNlT ,;i:V;.., ,, . .1, :{8.:ã}'t'E{ {'t ÞÃ*"s{ -¡.-t'f .\'{ : January 16,2023 PhilCastine Project No. C1713 Subsurface lnvestigation and Onsite Wastewater Treatment System Design 3-Bedroom Residence + 1 Future Bedroom 1447 CR321 Garfield County, Colorado Phit, CBO lnc. performed a subsurface investigation and completed an onsite wastewater treatment system (OWTS) design for the subject residence. The 38.647-acre property is located outside of Silt, in an area where OWTSs are necessary. Legal Description: Sectionl 19 Township: 6 Range: 93 NWNE, NENW; EXCEPT A PARCEL OF LAND CONT. 36.26 AC. +/-, SAID PARCEL BEING MORE PARTICULARLY DESCRIBED PER SPECIAL WARRANTY DEED RECEPTION NO. 921251Subdivision: SQUIRES MINOR SUB Lot; I AS PER FINAL PLAT RECEPTION NO.9 Parcel lD: 2177-191-01-001 SITE CONDITIONS The property is currently developed with an outbuilding with no plumbing. A 3-bedroom residence is proposed with the possibility of an additional bedroom in the future. The residence will be served potable water from a private well on the propeñy. The well is located on the southern portion of the property, greater than 50-feet from the proposed septic tank and greater than 1O0-feet from the proposed soiltreatment area (STA). The water line has not been depicted on the site plan, but no OWTS component will come within 25-feet of the water line. There is a spring to the north of the property with a 1S-foot wide spring, pump house, and water line easement running north of the property line onto Lot 2 of the Squires Minor Subdivision. The OWTS component will come within 2S-feet of this easement. The proposed soiltreatment area (STA) location has an approximate five percent slope to the northeast. The proposed area is located in an open field vegetated with sparse 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. Page2 -; --f$::j': .- Pt -s,"#{fr1 I lP:ì"+-tt! I* View of property and well SUBSURFACE The subsurface was investigated on April 12,2022 by digging two soil profile test pit excavations (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 light brown silt clay loam to 3.O-feet, underlain by tan silt clay loam to a maximum depth explored of 8.0-feet. No bedrock or groundwater was encountered. The materials encountered in Test Pit #2 consisted of light brown silt clay loam to 2.O-feet, underlain by tan silt clay loam to a maximum depth explored of 7.O-feet. No bedrock of groundwater was encountered. 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 1 to 2-inches in length before breaking. Soil structure shape was blocky and consistence was friable. Soil texture was smooth. STA sizing is based on SoilType 3, Silt Clay Loam with moderate structure grade. A long term acceptance rate (LTAR) of 0.35 gallons per square foot will be used to design the OWTS. I Carla Ostberg holds a Certificate of Attendance and Examination from the CPOW Visual and Tactile Evaluation of Soils Training. I Page 3 f.'. '' -:íhr .' Sieved sample 1 e 3 4 _: , ¡(^ t.! Test Pit #1 View of site )iË\: 1í ffi '¡!'.:'a ;*-: ..úi.)'r 'r*. .¡ "- "r.q. Þ+ | a'-', ' . -'':* L.t-'t' ^å 1 I:{ Ribbon 1 to 2 inches in length before breaking Page 4 Test Pit #2 .lÞ . .r .,a .d: -" -t .ì ii Backfill DESIGN SPECIFICATIONS Desiqn Calculations: Average Design Flow = 75 GPD x 2 people/bedroom x 3 Bedrooms + 75 GPD (4th bedroom) = 525 GPD LTAR = 0.35 GPD/SF 525 GPD / 0.35 GPD/SF = 1500 SF 1500 SF x I .0 (gravity trenches) x 0.7 (chambers) = min. 1050 SF The OWTS design is based on 4-bedrooms. An average daily wastewater flow of 525 GPD will be used Page 5 For the purposes of this OWTS design, Benchmark Elevation at approximate grade 5615' has been established as 100' (Finished Floor). 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 installation practices. Component elevations may change ng installation due to site conditions. Minimum grade refers to piping between components 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. The system installation must include a minimum 125O-gallon, two-compartment septic tank with an effluent filter on the outlet tee. We have provided specifications for a 15OO-gallon, two-compartment poly lnfiltrator@ septic tank, but any state-approved poly or concrete septic tank is acceptable. 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 six 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 equalflow to each trench. Each trench will consist of 15 'Quick 4' Plus Standard lnfiltrator@ chambers for a total of 90 chambers and 1080 sguare 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. OWTS Gomponent Minimum Elevation Primary Tank lnlet lnvert Approximate horizontal distance 18'/ min. 2%fall I min.4.5" fall Distribution Box Approximate horizontal distance 22' I min. 1% fall I min. 2.75" fall lnfiltrative Su¡face Approximate horizontal distance to furthest trench 43'l min. 1%fall / min.5.375" fal! COMPONENT MANUFACTURER MODEL NO COMMENTS Septic Tank lnfiltrator@ Item # lM-1530-2CP 1500-gallon,2- compartment septic tank lmin. 1250-qallons) Risers and Lids Orenco@ Double-walled PVC risers and lids Effluent Filter Orenco@ 4-inch diameter Fullsize Distribution Box Polylok Distribution box, lids, rises, and (4)flow equalizers L;hambers lnflltratone Plus standard 90 'Qulck 4' chambers Page 6 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. INSTALLATION 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 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 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. Untilvegetation 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 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 PageT 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 the 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 the 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 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 Contractors may be required by county regulation. Please call with questions. Sincerely, CBO lnc. r'l - Carla Ostberg, MPH, REHS N DRAWINGS MUST BE USED IN CONJUNCTION WITH DESIGN LËTTER DATED O1 I 1612023 SCALE: 1 - 50'=0" Non-Buildo6¡¿ ¿v¿q -J {¿f 7.5',J tol'- c.joì t: Area of ItApproual I PROPERTY l.f) ol Èl\- Driuewag r ñ ^i ñ: _ . f :._ CBO lnc. 129 Calns Lane Carbondale, ColoEdo 81623 Phone 970.309.5259 cala,ostbðrg@gmâll.com Gastine Residence 1447 CR321 Garfield County, Colorado ProjêctNumber: C1713 Dale: o1116t2923 Designed by: CgO Drawn by; DD w1 .0 Sheet 1 0F 4 N F::ll SCALE: 1" = 30L0" 'QUICK-4' CHAMBER TRENCHES. 6 TRENCHES WITH 15 CHAMBERS PER TRENCH FOR A TOTAL OF 90 CHAMBERS AND 1O8O SF. 4" DIA SDR-35 INSPECTION PORT AT BEGINNING AND END OF EACH HOLY CROSS EASEMENT o"*ld/ ñ"/Ur/ TP2 4'DIA SDR-35 SEWER LINE TO EACH TRENCH (MrN. 1% SLOPE TO TRENCH) + DISTRIBUTION BOX WITH ACCESS AT GRADE +TPl 4" DIA SDR-35 SEWER LINE TO SÏA (MrN. 1% FALL TO STA) MIN STA BM 100' FF AAPROX,5615' MIN. 1 25O.GALLON, TWO-COMPARTMENT SEPTIC TANK WITH EFFLUENT SCREENÀ/¡ --t I 4" DIA SDR-35 SEWER PIPE WITH CLEANOUT / - (MtN 2% FALL TO TANK) /'I ) //////////PROPOSED DRIVEWAY PROPOSED 4-BEDROOM RESIDENCE CBO lnc. 129 Cains Lâne Cårbondale, Colorådo 81623 Phone 970.309.5259 carlâ.ostberg@gma¡l.com Castine Resldence 1447 CR321 Gârfleld County, Colorado Project Number: C1713 Daþ: 4111612023 Deslgned by: CBO Drawn by: DD w2.0 Sheet 2 0F 4 (:It{ },.CBO lnc.'129 Ca¡ns LaneCarbondale, ColoEdo 81623Phone 970.309.5259Érla.ostberg@gma¡|.æmDIA SDR.35INSPECTIONPORl4sotLILIMITÊXCAVATIONSCARIFIGRAVELLESS NUICK4'CHAMBER (4'x 3)4' DIA SDR-35 DISTRIBUÎON LINE TO EACHTRENCH (MrN. 1% SLOPE TOTRENCH)4" DIASDR-35EFFLUENT PIPE FROMSEPTICTANK/ñ CHAMBER 'IRENCH SEC'IION\lr--ffiE¡3END PUTE'QUtCK-4'CHAMBER {4'x 3')DISTRIBUTION BOX WßVALVE COVERBOX OR IRRIGATIONVALVE BOX AT GRAÐECAP OR THREADEDCLEANOUT ASSEMBLYCOMPACTBASE TO SUPPORTBOXPVC PIPE CUT TO4'FITUSE HOLE SAWTOCUT THRU TOP OFPIPÉS PLACEÞ INENDTOP PORT OF CHAMBER ÊNDPLATES/ãINSPECÎON PORI DEÌA|L\:ir-æ4" DIA SDR-35 INSPÊCTION PORTAT BEGINNING AND END OFEACH TRÈNCHFINISHED GRADE/^CHAMBER 'IRENCH PLAN\r-------trfEE24'MtN.4'DIA SDR-35 SEWER LINE(MrN 2olo SLOPE TO TANK,MtN. 1olo TO STA)SCREENEDOR SAND FORBEDDING3" MtN.I'MtN./I IRENCTI DETAIL\3/----rnirffi15 CHAMBERS PÊRÎRENCHIICastine Residence't447 CR321Garfield County, ColoradoProjectNumben Cl713lDaþi 01t16r2023loes¡gneo nv: ceolDrawn uv: oDw3.0Sheet 3 0F 4 CBO lnc.129 Cains LaneCarbondale, CdoEdo 81623Phone 970.309.5259carla.ostbe¡g@gmail.comDESIGNSTA TO WATER COURSE50'nlaSTATO WELL100'350'STATO HOUSE20'SEPTIC TANK TO WATER COURSE50'nlaSEPTIC TANK TO WELL50'313HOUSE TO SEPT|C TANK5'14',OWTS COMPONENTS ANDPHYSICAL FEATURESMINIMUM REOUIREDSETBACKAPPROXIMATE PROPOSEDSETBACK3€EDROOû| RÊSIDENCE + 1 FUTURE BEDROOM75 GPD x 2 PERSONSiBEDROOM x 3 BEDROOMS + 75 cPD (4th BEDROOM)WASTEWATER FLOW = 525 GPDTANK:MIN.1250 GALLONSUSE 125o-GALLON, TWO.COMPARTMENT CONCRETE SEPTIC TANK ORJsOO-GALLON, TWO,COMPARTMÊNT POLY SEPTIC TANKSOIL TREATMENT AREA (STA}:LONG TERM ACCEPTANCE RATE (LTAR) = 0.s5 GAU SFCALCULATED STA = Q/LTAR = 525 / 0.35 = 1500 SFGRAVITY, TRENCHES = I s00 SF X 1.0 = 1500 SFCHAMBERS = 1s00 SF X 0.7 = 1050 SF / 12 sF / CHAMBER = 88 CHAMBERSSIX GRAVELLESS CHAMBER TRENCHES15'QUICK 4'CHAMBERS IN EACH TRENCHTOTAL 90 'QUICK 4' CHAMBERSBOX AND COVER BROUGHT TO GRADECONCRETE LID.Ñf,SOIL PROFILE TEST PIT NO. 1SOIL PROFILE TEST PIT NO.2LEGENDnsilt dayloam-0-1-2-34LIGHl BROWN SILT CLAY LOAMLIGHT BROWN SILT CLAY LOAMBAFFLE ORANGLED PIPETO BE USEDAT INLÊT,.À DIS'IRIBUTON BOX DETAIL\3---ÊãæTAN SILT CLAY LOAMTAN SILT CLAY LOAM-5-6-7:!a!L.t"!10SLIP-ON PVCDO NOT GLUEINSULATEDTRACER WIREFINISHED GRADE4'DIASEWER LINENO GROUNDWATER OR BEDROCK ENCOUNTEREDDURING EXCAVATIONTOTANKHOUSE/ã,CLEAN OUT DETAILE/r-'.trriffiOUTLÊTSooooGastine Residence1447 CR321Garfield County, ColoradoProjectNumber: C1713Ðate: 0111612023Designed by: CBODrawn by: DDw4.0Sheet 4 0F 4 zfÀùtØà=Èúr+P2m8SHEETSITE PLANñsÌds/rrs¡!s"ns3ö2?0¡r--"Ì¡--oÛ16&S¡trItrFE-r=-êÆLruCtuntA Road 321@n2 fþE AccountNumber R084999 ParcelNumber 277779IOIOOT Acres 39 LandSqFt 0 TaxArea O24 2019 Mill Levy ó5.5390 Date created: I/20/2O23 Läst Data Uploaded: t/20/2O23 2:24:03 AM D"u"looudbY&ï.., _, .. . ; L. Garfield County, CO Overuiew Legend ; ' Parcels Roads Parcel/Account Numbers Owner Name Lakes & Rivers - County Boundary Line Physical Address 1447 327 COUNTY RD RIFLE 81ó50 Owner Address SQUIRES,JESSEWADEJR T4øTCOUNTy ROAD321 RTFLE CO 81ó50 2019Total ActualValue $67,660 Last2Sales Date Price 7O/s/2O22 $O 4/8/2O7e $O 0787 rll R21 0786r 711 840031ll "\ , rrrll I I rr¡tt lli,[,1,i ¡ l]i I 830031 5 21 CORPORATION lll ' .ROW-.:. !#-1,q. 1: ,,#, 2 1 3 1 771 92001 38 SANDRA 3785 LLC G@ñI'-¡--- j'j ;"ii't.''.iii"-j:¡:liì,l 'lrÌ R024404 2177ß2A0214 j .n ,_ _ Í!.' g:ì'' R009118 217719100495 R024395 217719140136 : li ¿-.1,:,eirìil ' ,'.::: ,1'1.' Ëii:¡ I .2 BRUNËR CRAIG Nrlii' ¡o3 R247333 217715400454 . R007577 21 7720301 001 $ ft t:.i 1120123, 12:23 PMqPublic.net - Garfield County, CO - Propefly Recod Gard: R084999r%qGarfield County, COSurnrvraryAccountParcelProp€rtyAddressLegalDescriptionAcresLard SqFtTaxAreaM¡ll l-e!ry9¡bdivisionR08499921779tOtOO|u47 32r COUNTY RD, R|FLE, CO 81ós0Section: 19 Township: ó Range: 93 NWNE, NENW; EXCEPTA PARCEL OF LAND CONT.3ó.2ó AC. +/-,SAID PARCEL BEING MORE PARTICULARLY DESCRIBED PER SPECIALWARRANTYDEEDRECEPTION NO. 921251Subd¡v¡s¡on: SQUIRES MINOR SUB Lot: 1AS PER FINAL PLAT RECEPTIONNO.938.647o246s.5390sQUIREs MINORSUBS,¡vr¡er1447 COUNTY ROAD 321RTFLE CO 81ó50LandUnitType SINGLE FAM.REs.-LAND - 1112 (RES¡DENTIAL PROPERry)Squâre Fæt 0,4ctma[ VaiueçAssessedYearLand Actuallmprovement ActualTotalActualÂssessecl ValuesAssessedYearLand Assessedlmprovement AssessedTotal AssessedTax å-listoryTaxYearTaxes Billed2022$ós,000.00$2,óó0.00$ó7,óó0.002022$4,520.00$18o.oo$4700.002022https://qpublic.schneidercorp.com/Application.aspx?ApplD=1038&LayerlD=2238'l&PageTypelD=4&PagelD=9447&Q=259274217&KeyYalue=R084999$308.041t3 1120123,12'.23 PMTra¡'¡sfersqPublíc.net - Garfield County, CO - Property Record Card: R084999Reception NumberSale DateIO/5/20224/8/2079!125/20187/8/207670/u2013lo/2/20t37/30/2æ78/75/2006u9/2æ62/9/20066/8/20054/4/2AOt8/7712æO8/t7/2æO6/9/7977LA/t4tt9&Deed TypePlatSTATEMENTOFAUTHORITYDEATH CERTIFICATEBENEFICIARY DEEDSPECIALWARRANTY DEEDSTATEMENT OFAUTHORITYQUITCLAIM DEEDQUITCLAIM DEEDEASEMENTAGREEMENTEASEMENTDEATH CERTIFICATEASSIGNMENTQUITCLAIM DEEDWARRANW DEEDDEEDBook - Page1835-15ó1844-6827772-9427697-339t207-5781205-5540497-05340201-00óóSale Price$o$o$o$o$o$o$o$o$o$o$o$o$o$o$o$oproperty Kelateei Fuhlic ü*cr"¡n-re*rtsFhatusNo data available for the followìng modules Buildings, Sketches.https://qpublic.schneidercorp.com/Application.aspx?ApplD=1038&LayerlD=22381&PageTypelD=4&PagelD=9447&Q=259274217&KeyValue=R0849992t3 il24¡23,12:23 PMqPubl¡c.net - Garfield County, CO - Property Record Card: R084999{*IijËr)Ii};\i i,qilhttps://qpublic.schneidercorp"com/Application.aspx?ApplD=1038&LayerlD=22381&PageTypelD=4&PagelD=9447&Q=259274217&KeyVgrlue=R0849993/3