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Home My WebLink AboutEngineer's Design Plan129 CAINS LANE CARBONDALE,CO 41623 970.sog.5259 CARLA. OSTBERG@GMAIL,COM s*:!r'f r(: t::(}lis{"it-'r' r N(} May 24,2024 Project No. C1881 Jesse Schoeller ftdirtwox@qmail.com Subsurface lnvestigation and Onsite Wastewater Treatment System Design 3-Bedroom Residence 6501 CR 170 Garfield County, Colorado Jesse, CBO lnc. performed a subsurface investigation and completed an onsite wastewater treatment system (OWTS) design forthe subject residence. The 10.239-acre property is located outside of Carbondale, in an area where OWTSs and wells are necessary. Legal Description: Section: 17 Township: 7 Range: 87 A TR lN THE SWNW 10.24 ACRES Parcel lD: 2391-172-00-014 SITE CONDITIONS The properiy is currently undeveloped. A 3-bedroom residence is proposed The residence will be served by a private well on ihe property" The well is located to the southwest of ihe residence. The well is located greater than S0-feet from the proposed septic tank and greater than 100- feet from the proposed soiltreatment area (STA). The proposed soiltreatment area (STA) location has an approximate fifteen percent slope to the southwest. The proposed area is vegetated with sage and native grasses. There should be no traffic or staging of material over the future STA site to avoid compaction of soills prior to construclion of the STA. SUBSURFACE The subsurface was investigated on May 13,2024 by digging three 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 dark brown clay loam topsoil to 3-feet, underlain by' light brown calcareous clay matrix to a maximum depth explored of 8.O-feet. No bedrock or groundwater was encountered. 1 Carla Ostberg holds a Certificate of Attendance and Examination fom the CPOW Visual and Tactile Evaluation of Soils Training. Page2 The materials encountered in Test Ph #2 consisted of dark brown clay loam topsoi! to 3.0-feet, underlain by greenish gray clay to a maximum depth explored of 8.O-feet. No bedrock or groundwater was encountered. The materials encountered in Test Pit #3 consisted of dark brown clay loam topsoil to 2.S-fee| underlain by light brown calcareous clay matrix to a maximum depth explored of 8.O-feet. No bedrock or groundwater was encountered. A sample of the soil was taken from Test Pit #1 at 2-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. Soiltexture was both gritty and smooth. A sample of the soil was taken from Test Pit #1 at 4-feet below grade. Soil structure grade was moderate. The soilformed a balland a ribbon less than 1-inch in length before breaking. Soil structure shape was blocky and consistence was friable. Soil texture was more gritty than smooth. We are proposing the STA to the north of Test Pit #2 in order to avoid those soils. The infiltrative area will be placed in the calcareous clay matrix horizon, below the topsoil. The soil is consistentwith SoilType2 with moderate structure grade. We are sizing slightly more conservatively on Soil Type 2A. A long-term acceptance rate TLTAR) of 0.5 gallons per square foot will be used to design the STA. View of wellhouse and house site (looking north) / View of proposed STA looking south Test Pit #1 Page 3 Topsoil (ribbon 1 to 2-inches)Soilprofile Sieved sample below 3' Ribbon less than 1-inch Looking from Test Pit #1 toward Test Pit#2 Page 4 Test Greenish Gray clay (avoid this area) Test Pit #3 Test Pit #3 Backfill of Test Pit #3 DESIGN SPECIFICATIONS Design Calculations: Average Design Flow = 75 GPD x 2 people/bedroom x 3 Bedrooms = 450 GPD LTAR = 0.5 GPDISF 450 cPD i 0.5 GPD/SF = 900 SF x 1.0 (gravity trenches) x 0.7 {chambers; = 630 SF Page 5 The OWTS design is based on 3-bedrooms. An average daily wastewater flow of 450 GPD will be used. For the purposes of this OWTS design, Benchmark Elevation at grade 7194' has been esiablished 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 OWTS installation practices. Component elevations may change during installation due to site conditions. Minimum grade refers to piping between components. The 4-inch SDR-35 sewer line exiting the residence must have a double-sweep clean out and a minimum 2o/o grade to the sepiic tank. The system installation must include a 1000-gallon, two-compariment lnfiltrator@ poly septic tank with an Orenco@ Biotube effluent filter on the outlet tee. Any state-approved concrete or poly septic tank may be substituted. Risers must bring ihe 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 trench. Each trench will consist of 14 'Quick 4' Standard Plus lnfiltrator@ chambers for a total of 56 chambers and 672 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. COMPON ENT 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 submifted, in writing, to our office for approval prior to installation. Component technical data sheets are available upon request. lnfiltrative Surface Distribution Box Primary Tank lnlet lnvert OWTS Gomponent Approximate horizontal distance 30' to furthest trench I min. 1a/o fall to STA I min. 3.75' fall Approximate horizontal distance 50' / min. 1o/o fall I min.6.25" fall Approximate horizontal distance 1 0' 1 min. Za/o fall I min.2.5" fall Minimum Elevation Chambers Distribution Box Tank Risers and Lids Effluent Filter Septic Tank gOMPONENT lnflltrator(9 Polylok Orenco@ Orenco@ lnfiltrator@ MANUFACTURER 'Quick 4' Plus Standard tM-1060-2CP MODEL NO. 56 Chambers ]isiribution box, risers, lids, and flow equalizers (4) Llouble-walled PVC Rtsers and Lids (24" diameier) 4-inch diameter, full size 1O00-gallon, two- compartment poly septic tank COMMENTS Page 6 Construction must be according to the jurisdiction's adopted On-Site Wastewater Treatment System Regulations, the OWTS Permit, and this design. PERMIT APPLICATION INSTRUCTIONS An OWTS Permit Application must be submitted to Garfield County Environmental Health Department. Packet-Dec.-2019.pdf. tf the OWTS Permit Application will be submitted with a Building Permit Application, it should be submitted directly to Garfield County Building Department. All questions regarding permit submission can be directed to Garfield County Environmental Health Department, 970-945-661 4 x81 50. 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. [n 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 prope*y. 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 naiive 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 vegetaiion requiring regular inigation 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 flre 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 betler weight distribution. Livestock should not graze on the STA. Plumbing PageT 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 maierials 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 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 ihe 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. Excavaiion equipment must not drive in the excavation of the STA due to the potentialto 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. Requiremenis 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 quesiions. Sincerely, CBO lnc. (s"n,{* ilxdatg Carla Ostberg, MPH, REHS $qfublic,ngt* Garfield County, CO Account R011075 Number Parcel 2391172@Ot4 Number Acres 10 LandsqFt O TaxArea 011 2Ol9MillLevy 72.5tgA Physical Address Owner Address 6501170COUNWRD CARBONDALE SCHOELLER, JESSE & JORDAN 484CANYON CREEK DRIVE GLENWOOD SPRINGS CO 81601 2019TotalActual Value Overview Legend flParcels Roads Parcel/Account Numbers OwnerName lllrrif t-arcsanivers * CountyBoundary Line $525,m0 Last2Sales Date Price 6/t6/2023 $525,000 8173/2027 $STO,OOO 81623 D ate cr e ated: 5 / 24 I 2O24 Last Data Uploaded,l. 5/24/2424 2:18:56 AM DeveronedbvlFf kffigg 5124124, '11:45AM Garfield County, CO qPublic.net - Garfield County, CO - Property Record Card: R011075 VtswMa* Owner SCHOELLER, JESSE & JORDAN 484 CANYON CREEK DRIVE GLENWOOD SPRINGS CO 81601 Land Unit Type 10 AC TO VT 35 AC - 0540 (VACANT LAND) Square Feet 0 Actual Values Assessed Year land Actual lmprovement Actual Total Actual 6501 170 COUNTY RD, CARBONDALE, CO 81623 Section: lTTownship:7 Range:87ATR lN THESWNW 10.24 ACRES 70.239 T 72.5180 2024 $525,OOO.OO $52s,000.00 $o.oo 20.23 2022 $2so,000.00 $0.00 $o.oo $s2s,0oo.0o $2so,000.00 2023 2022 $146,480.00 $72,500.00 5ummary Account Parcel Property Address Legal Description Acres Land SqFt TaxArea MillLevy SuMivision Assessed Values Assessed Year Land Assessed lmprovement Assessed Total Assessed e!1324:21 8/17/20ot 8/17/2ffi7 lo/26/1993 uL8/7989 to/?7/.tegf. 4/t7/1986 R011075 239LL72000t4 TaxHistory Tax Year 2023 $70,622.44Taxes Billed Clirk here tovidwthe tax inisrrfiat;ai.} tsr tilis rafcd on tho Scdeid C$$nfvTieas!]rer's wrhsii*. Transfers Sale Date DeedType 6!.11._2_9?3 6/16/2023 ITCLAIM DEED $s2s,ooo.oo 2024 $146,480.00 $o.oo $!t6,zao.@ $o.oo $146,480.00 2427 $2so,ooo.oo ,19;oo. $2s0,000.00 2021 $72,500.00 $o.oo $72,500.00 2021 $5,783.76 2020g*.w"* $o.oo $23s,000.00 2020 $68,1s0.00 $o.oo $68,1sO.00 2020 $5,747.92 Sale Price $o $s2s.000 $310,000 -'q..9-- $24s.OOO $o.oo $72,s0O.00 2_422 $5,874.60 Reception Number s*iqan s86887 3S3g QUrrcLArM DEED SSgSg SPECIAL WARMNTY DEED SPECIALWARRANTY DEED WARRANTYDEED GENERALWARRANry DEED WARR,ANryDEED puelic iRUSiEEi Diib Book- Page 1279-86 1279-42 oseo-ossa 0747-0593 0697-0844 Jt5+ZJ ' 25$8-*J O449-03OO $25,000 $o PUBLIC TRUSfEES CERT 0686-0955 to/25/1984 WARRANTYDEED 9/70/1973 WARRANTYDEED $22,500 BARGAIN AND SALE DEED $o https:/Qpublic.schneidercorp,comlApplication.aspx?ApplD-1038&LayerlD=22381&PageTypelD=4&PagelD-9r447&Q-1155021S89&KeyValue-R011075 112 5124124,11:45 AM qPublic.net - Garfield County, CO - Property Record Card: R01107S Property Related Public Documents CIirk here to view prop*riv Related Public Bocuments Photos No data available for thefullowing modules: Buildinss, Sketches. 1i:* iier{x:?<i i)t::i:1:!ta:i A!;ti'r;!;:n i; '#'i{I'r.tti y\i}le!; i}\tti:{'ti ttii{rrt" i.t.J l,rati};? i.",t tn:,ri -.;t,a:.\.,::).!.;: I User Priv+cvPqliqy i Sg*8-*ivesyj*p*se Laet at+ UFI?+d;.5"1"?4j'!Q24 j.;;l$:5s AM tlfslwi$rr https:i/qpublic,schneidercorp.com/Application,aspx?ApplD=1O38&LayerlD=22381&PageTypelD=4&PagelD=9447&Q=1155021S89&KeyValue=R011075 212 TP2 TP1 TP3 STA SEPTIC TANK RESIDENCE N SCALE: 1 = 50'=0" DRAWINGS MUST BE USED IN CONJUNCTION WITH DESIGN LETTER DATED 05 I24I 2024 LINE , WELLHOUSE THE LOCATION OF PROPOSED IMPROVEMENTS SHOWN ARE NOT THE RESULT OF A PROPERry SURVEY. THE LOCATIONS ARE APPROXIMATE. IT IS THE HOMEOWNERS' DUry TO ENSURE ALL CONSTRUCTION AND IMPROVEMENT LOCATIONS ARE ACCURATE. PROPERry LINES AND SETBACK DISTANCES SHOULD BE CONFIRMED PRIOR TO EXCAVATION. SCALED FOR PRINTING ON 1 1" X 17'PAPER. CALL811 FOR UTILITY LOCATES CBO lnc. 1 29 Cains Lane Carbondale, Colorado 81623 Phone 970.309.5259 carla.ostberg@gmail.com Schoeller Residence 6501 CR 170 Garfield County, Colorado Projeci Number: C1881 Date: Q512412024 Designed by: CBO Drawn by: DD w1 .0 Sheet 1 0F 4 1 WITH WELL TP3 I SCALE: 1" = TP1 4' DIA SDR-35 DISTRIBUTION LINE TO EACH TRENCH (MtN. 1olo SLOPE TO TRENCH) BM'100'=FF7194' 3-BEDROOM RESIDENCE I I I 4- DIA SDR.35 SEWER PIPE WITH CLEANOUT MIN 2% FALL TO TANK 'QUICK4' CHAMBER TRENCHES. 4 TRENCHES WITH 14 CHAMBERS PER TRENCH FOR A TOTAL OF 56 CHAMBERS AND 672 SF. PROPERTY LIN POLYOOO-GALLON TWO-COMPARTMENT\ SEPTIC TANK WITH EFFLUENT SCREEN 4'DIA SDR-35 INSPECTION PORTAT BEGINNING AND END OF EACH TRENCH DISTRIBUTION BOX WITH ACCESS AT GRADE 4'DIA SDR-35 SEWER LINF TO STA (MrN. 1% FALL TO STA) CBO lnc. 129 Cains Lane Carbondale, Colorado 8't 623 Phone 970.309.5259 carla.ostberg@gmail.com Schoeller Residence 6501 CR 170 Garfield County, Colorado Project Number: C1881 Dalet OSl24l2O24 Designed by: CBO Drawn by: DD w2.0 $heet 2 0F 4 DISTRIBUTION BOX WITH AT GRADE INFILTRATOR END PLATF GRAVELLESS'OUICK.4' 4'DtA SDR-35 EFFLUENT PIPE FROM SEPTIC TANKCHAMBER (4'x 3')NOTE: INFILTRATIVE AREA MUST BE PtAcED BELOW THE TOPSOIL HORIZON. DIA SDR-35 DISTRIBUTION LINE TO EACH TRENCH (MIN. 1% SLOPF TO TRENCH}DIA SDR-35 INSPECTION PORT PLACED IN 4'TOP PORT OF CHAMBER END PLATES 4'max L solL 2'minlLIMIT EXCAVATION SCARIFY GRAVELLESS .oUICK4' CHAMBER (4'x 3') TACHAMBER TRENCH SECTION\rr-rtrcE4' DIA SDR-35 INSPECTION PORT AT BEGINNING AND END OF EACH TRENCH SMALL VALVE COVER BOXOR IRRIGATION VALVE BOX AT GRADE FINISHED GRADE CAP ORTHREAOED BOX AND COVER BROUGHT TO GRADE CLEANOUT ASSEMBLY 24" MtN.CONCRETE COMPACT 4- DIA SDR-35 SEWER LINE (MtN 27o SLOPE TO TANK, MrN. 1% TO STA) GRADE SASE TO SUPPORT BOX 4'PVC PIPE CUTTO FIT USE HOLE SAW TO CUT THRU TOP OF SCREENED END OR SAND FOR BEDDING 3'MlN. 8" MtN. BAFFLE OR ANGLED PIPE TO BE USED A INSPECTION PORT DETAIL\9r-rT@ AT INLET /A IRENCH DETAIL\3/r--'-r1d?r ,A DISTRIBUTION BOX DETAILL?-6rFffi E 14 CHAMAERS PER TRENCH rI IIIII BACKFILL OUTLETS oooc CBO lnc. 129 Cains Lane Carbondale, Colorado 81623 Phone 970.309.5259 carla.ostberg@gmail.com Schoeller Residence 6501 CR 170 Garfield County, Colorado Project Number: C1881 ost24na24 w3.0 by: CBO by: DD Sheet 3 0F 4 SLIP.ON PVC DO NOT GLUE DESIGN 4€EDROOM RESIDENCE (75 GPD x 2 PERSONS/BEDROOM x 3 BEDROOMS) WASTEWATER FLOW = 450 GPD INSULATED TMCERWIRE FINISHED GRADE 4'DIA SEWER LINE TANK: MIN, lOOO GALLONS USE lOOO€ALLON, TWO-COMPARTMENT SEPTIC TANK TO TANK HOUSE SOIL TREATMENT AREA (STA): LONG TERM ACCEPTANCE RATE (LTAR) = 0.6 GAU SF CALCULATED STA = Q/LTAR = 450 / 0.5 = 900 SF GMVITY, TRENCHES = 900 SF X 1.0 = 900 SF CHAMBERS = 900 SF X 0.7 = 630 SF I 12 SF / CHAMBER = 53 CHAMBERS FOUR GMVELLESS CHAMBER TRENCHES 14'QUICK4'CHAMBERS IN EACH TRENCH TOTAL 56 'QUICK 4' CHAMBERS SOIL PROFILE TEST PIT NO. 1 SOIL PROFILE TEST PIT NO. 2 SOIL PROFILE TEST PIT NO.3 0 1 2 3 DARK BROWN SILTY CLAY LOAM TOPSOIL DARK BROWN SILTY CLAY LOAM TOPSOIL DARK BROWN SILTY CLAY LOAM TOPSOIL LIGHT BROWN CALCAREOUS CLAY MATRIX GREENISH GRAY BLOCKY FIRM CLAY LIGHT BROWN CALCAREOUS CLAY MATRIXF UJ llJlr IF(I t!o -4 5 6 LEGENP l'q topsoll lT calcareous clay matrix A ctayNO GROUNDWATER OR BEDROCK ENCOUNTERED DURING EXCAVATION ASOILS LOGre STA TO WATER COURSE 50'N/A STATO WELL 100'',l10i STATO HOUSE 24',61' SEPTIC TANK TO WATER COURSE 50'NIA SEPTIC TANKTO WELL 50'149 HOUSE TO SEPTIC TANK 5'10' OWTS COMPONENTSAND PHYSICAL FEATURES MINIMUM REQUIRED SETBACK APPROXIMATE PROPOSED SETBACK CBO lnc. 129 Cains Lane Carbondale, Colorado 81623 Phone 970.309.5259 carla.ostberg@gmail.com Schoeller Residence 6501 CR 170 Garfi eld County, Colorado Project Number: C1881 Date: 0512412O24 Designed by: CBO Drawn by: DD w4.0 Sheet 4 0F 4