The URL can be used to link to this page

Home My WebLink AboutEngineer's Design ReportI29 CAINS LANE CARBoNDALE, CO A1623 970.309.5259 cARLA.osreenc@cverL.coM sf tl>'l' l(: (;oN'stf ,' f -'l' Il\(; September 27,2023 Project No. C1840 Jose Chavez mountainpeakinsulation@yahoo.com Subsurface lnvestigation and Onsite Wastewater Treatment System Design 4-Bedroom Residence TBD CR 331 Garfield County, Colorado Jose, CBO lnc. performed a subsurface investigation and completed an onsite wastewater treatment system (OWTS) design for the subject residence. The 39.862-acre property is located outside of Silt, in an area where OWTSs and wells are necessary. Legal Description: Section: 16 Township: 6 Range: 92 NESE EXCEPT A TR. AS DESC lN 685/951 Parcel lD: 2179-164-00-440 SITE CONDITIONS The property is currently undeveloped. A 4-bedroom residence is proposed The residence will be served by a private well on the property. The well is located over 350-feet to the east of the proposed residence. The water line was not indícated on the site plan provided to us. The water line cannot come within lO-feet of the septic tank or 2S-feet of the soil treatment area (STA). The proposed soiltreatment area (STA) location has an approximate five percent slope to the northeast 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 soils prior to construction of the STA. SUBSURFACE The subsurface was investigated on September 27,2023 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 underlain by light brown silt clay loam with cobbles 1 to 4-inches in diameter (less than 35%) to a maximum depth explored of 7.0- feet. No bedrock or groundwater was encountered. The materials encountered in Test Pit #2 consisted of light brown silt clay loam topsoil to a maximum depth explored of 7.O-feet. No bedrock or groundwater was encountered. ICarla Ostberg holds a Certificate of Attendance and Examination from the CPOW Visual and Tactile Evaluation of Soils Training. Page2 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 riþbon 1 to 2-inches in length before breaking. Soil structure shape was blocky and consistence was friable to firm. Soiltexture was more smooth than gritty. The soil is consistent with Soil Type 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 STA. Test Pit #1 Sieved sample Ribbon 1 to 2-inches Page 3 Some small cobbles in Test Pit #1 below 4' Looking from Test Pit #1 toward Test Pit#2 to the south \q- ' I Test Pit #2 Page 4 Test Pit #2backfill 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 x 1.0 (gravity trenches) x 0.7 (chambers) = 1050 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 as 100' (Finished Floor). CBO lnc. should be notified of any discrepancies or problems with grade elevations of proposed components during installation of the OWïS. *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 2% grade to the septic tank. The system installation must include a minimum 1250-gallon, two-compartment septic tank with an Orenco@ Biotube effluent filter on the outlet tee. A poly or concrete septic tank may be utilized. We have provided specifications for a 1500-9allon, two-compartment lnfiltrator@ poly septic tank as our preferred option. 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 five 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. OWTS Gomponent Minimum Elevation Primary Tank lnlet lnvert Approximate horizontal distance 10'/ min. 2%fall I min.2.5" fall Distribution Box Approximate horizontaldistance 10'l min. 1%fall I min. 1.25" lall lnfiltrative Surface Approximate horizontal distance 35' / min. 1% fall to STA / min. 4.375" lall Page 5 Each trench will consist of 1B 'Quick 4' Standard Plus lnfiltrator@ chambers for a total of 90 chambers and 1080 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. GBO Inc. 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 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. n nmental-healt Packet-Dec.-2019.pdf. lf 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. COMPONENT MANUFACTURER MODEL NO.COMMENTS Septic Tank lnfiltrator@ tM-1530-2CP 1500-gallon, 2- :ompartment poly septic iank Risers and Lids Orenco@ Double-walled PVC "isers and lids Effluent Filter Orenco@ 4-inch diameter Full size Distribution Box Polylok Distribution box, lids, rises, and (5) flow equalizers Chambers lnllltratorG)standard Plus 90 'Qu¡ck 4', chambers Page 6 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 Iocation, 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. 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 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 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. Page 7 LIMITS: The design is based on information submitted. lf soil condit¡ons 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, GBO lnc. (Å,\[a tgtú'<'-.g Carla Ostberg, MPH, REHS DRAWINGS MUST BE USED IN CONJUNCTION WITH DESIGN LETTER DATED 09127 12023 CBO lnc. 129 Cains Lane Carbondale, Colorado 81623 Phone 970.309.5259 carla.ostberg@gmail.com 1 SCALE: 1 = 50'=0' I ) N M 4-BEDROOM RESIDENCE TP2 LINE Chavez Residence TBD CR 33I Garfield County, Colorado ProjectNumber: C1840 Dale: 0912712023 Designed by: CBO Drawn by: DD THE LOCATION OF PROPOSED IMPROVEMENTS SHOWN ARE NOT THE RESULT OF A PROPERTY SURVEY. THE LOCATIONS ARE APPROXIMATE. IT IS THE HOMEOWNERS' DUTY TO ENSURE ALL CONSTRUCTION AND IMPROVEMENT LOCATIONS ARE ACCURATE. PROPERW LINES AND SETBACK DISTANCES SHOULD BE CONFIRMED PRIOR TO EXCAVAT¡ON. SCALED FOR PRINTING ON I,I'X'I7'PAPER. PROPOSED WELL APPROXIMATE LOCATION OF w1 .0 Sheet 1 0F 4 74 1 4-BEDROOM RESIDENCE MIN. 1250-GALLON, SEPTIC TANK WITH EFFLUENT SCREEN DISTRIBUTION BOX WITH ACCESS AT GRADE rP2 N SCALE: l" = 3010" 100'= PROPOSED WELL IS APPROXIMATELY 390' EAST OF HOUSE FINISHED FLOOR 4' DIA SDR-35 SEWER PIPE WITH CLEANOUT MIN 2% FALL TO TANK\ \ \ \ \ \\ DIA SDR-35 SEWER LINE TO STA (MrN. 1% FALL TO STA) \ \ \\ 4'DIA SDR-35 DISTRIBUTION LINE TO EACH TRENCH (MrN. I % SLOPE TO TRENCH) \ \ \ \ \ \\\\\\, CHAMBER TRENCHES. 5 TRENCHES WITH 18 CHAMBERS PER TRENCH FOR A TOTAL OF 9OO CHAMBERS AND 1O8O SF. 4' DIA SDR-35 INSPECTION PORT AT BEGINNING AND END OF EACH TRENCH CALL 81,I UTILITY LOCATES cBO lnc. '129 Cains Lane Carbondale, Colorado 81 623 Phone 970.309.5259 caria.ostberg@gmail.com Chavez Residence TBD CR 331 Garfield County, Colorado ProjectNumber: C1840 Dale: 0912712O23 Designed by: CBO Drawn by: DD w2.0 Sheet 2 0F 4 1 8 CHA¡.I|BERS PER TREÑCH - I NFILTRATOR / END PLATE GRAVELLESS 'QUICK.4' CHAMBER (4'x 3) 4" DrA SDR-35 EFFLUENT PIPE FRÕM SEPTIC TANK ,- 4' DIA SDR-35 D¡STRIBUTION LINES/ TOADDITIONALTRENCHES(5 TOTAL) (MrN. 17o SLOPE TO TRENCH) DISTRIBUTION BOX WTH AT GRADE MIN. 4'DIA SDR-35 DISTRIBUTION LINE TO EACH TRENCH (MtN. 1% SLOPE TO TRENCH) PLACED IN TOP PORT OF CHAMBÊR END PLATES FINISHED GRADE 24'MtN. /iCHAMBER TRENCH SECTON\¿r--rFæ BOXAND COVER BROUGHTTO GRADE CONCRETE ffiffiD-- DIA SDR-35 INSPECTION PORT 'QUTCK-4' CHAMBER (4'x 3') /IDISÏRIBUTON BOX DET\9t-ïı7rûæ L ËXCAVATION SCARIFY sotL j"4' DIA SDR-35 INSPECTION PORTAT BEGINNING AND END OF EACH TRENCH SMALL VALVE CÔVER 8OX OR IRRIGATION VALVE BOX AT GRADE COMPACT CAP OR THREADED CLEANOUT ASSEMBLY PVC PIPE CUT TO FIT 4' DIA SDR-35 SEWER (MlN 2olo SLOPE TO TANK, MrN. 1% rO STA) SCREENED BASE TO SUPPORT BOX USE HOLE SAWTO CUT THRU TOP OF OR SAND FOR BEDDING 3" MtN. BAFFLE OR ANGLED PIPE TO BE USED AT INLET AIL w3.0 OUTLETS oooo CBO lnc. 129 Cains Lane Carbondale, Colorado 81623 Phone 970.309.5259 carla.ostberg@gma¡1.æm Ghavez Residence TBD CR 33I Garfield County, Colorado ProjectNumber: C1840 baê: 09127t2o23 loe"isneo ny, cao lDrawn bV: DD Sheet 3 0F 4 -0 -1 -4 6 -7 -8 -9 -10 DESIGN 4-BEDROOM RESIDENCE 75 GPD X 2 PERSONS/BEDROOM X 3 BEDROOMS + 75 GPD (4th BEDROOM) WASTEWATER FLOW = 525 GPD TANK: MIN. 1250 GALLONS USE MIN. 12sO.GALLON, TWO-COMPARTMENT SEPTIC TANK SOIL TREATMENT AREA (STA): LONG TERM ACCEPTANCE RATE (LTAR) = 0.35 cAU SF CALCULATED STA = øLTAR = 525 / 0.35 = 1500 SF GMVITY, TRENCHES = 1500 SFX 1.0 = 1500 SF CHAMBERS = 1500 SF X 0.7 = 1050 SF / 12 SF / CHAMBER = 88 CHAMBERS FIVE GRAVELLESS CHAMBER TRENCHES 18'QUICK 4'CHAMBERS IN EACH TRENCH TOTAL 90 'OUICK 4' CHAMBERS SOIL PROFILE TEST PIT NO. 'I LIGHT EROWN SILT CLAY LOAM LIGHT BROWN SILT CLAY LOAM WTH 1 TO 4-|NCH DTAMETER COBBLES (LESS THAN 35%) SOIL PROFILE TEST PIT NO. 2 LIGHT BROWN SILT CLAY LOAM STA TO WATER COURSE 50'N/A STA TO WELL 1 00'362' STATO HOUSE 20'30' SEPTIC TANK TO WATER COURSE 50'N/A SEPTIC TANK TO WELL 50'400' HOUSE TO SEPTIC TANK 5'9' OWTS COMPONENTSAND PHYSICAL FEATURES MINIMUM REQUIRED SETBACK APPROXIMATE PROPOSED SETBACK ASE]BACK CHART \7 id û scu SLIP.ON PVC DO NOT GLUE INSULATED TRACER WIRE FINISHED GRADE 4'DIA SEWER LINE TO TANK FUUL IFÈUô /ñ SOILS LOG \y Ndñs LEGEND f,l sircray loam w4.0 CBO lnc- 129 Cains Lane Carbondale, Colorado 81623 Phone 970.309.5259 carla.ostberg@gmail.com Ghavez Residence TBD CR 33I Garfield County, Colorado ProjectNumber: C1840 Dalet 0912712023 Designed by: CBO Drawn by: DD /ICLEAN OUT DETAILs/ þrþw Sheet 4 0F 4 Consulting, Suileying PORTON OF flü SE I/4 SEMON PARTIAL EXISTING CONDITIONS SURVEY A PARCEL OF LAND SITUATED IN THE SEI/4 OF SECTION 16, TOWNSHIP 6 SOUTH, RANGE 92 WEST OF THE SIXTH PRINCIPAL MERIDIAN COTJNTY OF GARFIELD, STATE OF COLOMDO SCÀLE I" =2,000 @ @ cÊ@tc scñ t¿rjjj:i-i lL:rs:=ll t ( I I I ,il,i/ ,,,,t' ÐqPublic.net'" Garfield County, co 87652 2019 Total Actual Value Overview Legend l-l Parcels Roads Parcel/Account Numbers Owner Name Lakes & Rivers - CountyBoundary Line $1ó0,000 Last2Sales Date Price 6/30/2023 $L74pOO n/a $ Account R230808 Physical 0 331 COUNTY RD Number Address Parcel Number 277976400440 SILT Acres 40 OwnerAddress CHAVEZ,JOSEA LandSqFt 0 5O33COUNTYROAD335 TaxArea O23 #33 2019MillLevy ó5.5390 NEWCASTLECO87647 Date created: 9/27 /2023 Last Data Uploaded: 9 /27 /2023 2:08:38 AM Deve I oped ryC) 9..Xt9,9,,{çf 9127123,12130PM Garfreld County, CO Summary Account Paræl Property Address Lrgel Dscrlptlon Acrer Land SqFt Tax Area MlllLevy SuHlvlslon qPublic.net - Garfield County, CO - Propsrty Record Card: R230808 R230808 27797640/ô440 0 33ICOUNWRD,SrLLCO 81ós2 Sectionr 1ó Townshlp: ó Renge: 92 NESË EXCEPT ATR. As DESC lN ó851951. 39.862 0 23 ó5.5390 ViewMap Owner CHAVEZ.JOSE A 5033COUNIYROAD Tâx Year Tâxes BÌlled 335#33 NEWCASTLE CO 81ó47 Land Unlt Type 35 AC TO VT 100 AC - 0550 (VACANT LAND) Square Fæt 0 Actual Values Ass$sd Year Land Actuål I mprovement Actual Total Actual Assessed Values Asssed Year LandAssessed lmprovement Æsessed lotal Assessed Tax Hístory 2023 $1ó0,000.00 $0.00 $1ó0,0m.0{, 2023 $44,64Æ..@ $0.00 S44,ó.o.(xl 2027 s7,928.60 2l)22 $90,000.00 $0.00 $90,000.00 2022 $2ó,100.00 $0.00 $2ó,100.00 2021 $90,000.00 $0.00 $90.000.00 2021 $2ó,100.00 $0.00 $2ó,100,00 2022 $1,710.só 2020 $1,945.ó8 2079 $1,831.84 Click here tovìewthe tax ìnformâtion for this Dårcel on the Ga16eld Countv Treasurer's website. 1t2 9127123,12:30 PM Transfers Sale Date 7/24t2023 7/77/2023 6/30t2023 6/30t2023 6t6/2077 5/3U20!7 5t74/7997 6/8/7989 4/7/7986 Dæd Type PERSONAL REPDEED Letters Of Admlnlstratlon Etc, SPECIAL WARRANTY DÊEO QUIT CLAIM DEED DEATH CERTIFICATE Proof Of Deãthand Helrshlp PERSONAL REP DEED NOlICEOF LIS PENDENS WARRANTYDEED 402743 369923 7079-OO27 0755-0ó50 0ó85-09s1 qPubl¡c.net - Garfield County, CO - Propsrty Rscord Card: R230808 Ræeptlon Number 987?77 947970 988020 701433 4o3499 803501 Bæk' Pate 7477-2!o Prlce $0 $o sale $o $o $o $o $o $174,000 $40,000 Property Related Public Documents Click here to view Propt!!y-Bgle!g!UqÞtqÞ9ç!tr948 No data avallable for the follow¡ng modules: Bu¡ld¡ngs, Photos, Sketches. fhe Garfield County Assessor's Offrce makes everyeftort to produce the most åccurate information poss¡ble. No!vãrrantìes.expressed or ¡mplied are provided for the data herein, its use or interpretalion. Dat¿ is subiect to constant change and its accurâcy ând completcness cannot be guarânteed. | !¡elPllyaly isl&y I GDPR Privacv Notice last Ð ata,u pJeedt,e /21.1 2o23J2-jogj¡g¿M Contâct Us Developed by C)Fþtp^'dçt 2t2