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HomeMy WebLinkAboutEngineers' Design Plan- Revised 02-07-24129 Cains Lane Carbondale, CO 81623 970.309.5259 carla.ostberg@gmail.com February 7, 2024 Project No. C1863 Guy Middleton gmpumper@icloud.com Subsurface Investigation and Onsite Wastewater Treatment System Design 3-Bedroom Residence 1916 CR 311 Garfield County, Colorado Guy, CBO Inc. performed a subsurface investigation and completed an onsite wastewater treatment system (OWTS) design for the subject residence. The 0.879-acre property is located outside of Silt, in an area where OWTSs and wells are necessary. Legal Description: Quarter: SW Section: 12 Township: 6 Range: 92 TRACT OF LAND SITUATED IN LOT 8 Parcel ID: 2179-123-00-737 SITE CONDITIONS The property is currently developed with a residence on the western portion of the property which is served by a separate OWTS. The eastern portion of the property was developed with a mobile home, served by an OWTS. The mobile home has been removed and the OWTS will be properly abandoned. A new 3-bedroom residence is proposed on the eastern portion of the property and will be served by the proposed OWTS described in these design documents. The residence will be served by a private well on the property. The well is located in the southeastern corner of the property. The well is located greater than 50-feet from the proposed septic tank and greater than 100-feet from the proposed soil treatment area (STA). The proposed soil treatment area (STA) location is relatively flat. The proposed area is vegetated with native grasses. The existing septic tank and STA previously serving the mobile home may be located in the proposed STA. If removal of existing OWTS components is necessary, remaining voids must be backfilled by native soils, tamped in 1-foot lifts. Efforts should be made to avoid placing the proposed STA over any over-excavated areas. 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. Page 2 Well approx. location of existing septic tank to be abandoned SUBSURFACE The subsurface was investigated on September 15, 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.1 The materials encountered in Test Pit #1 consisted of medium brown topsoil to 1-foot, underlain by light brown silt clay loam to 5-feet, underlain by light brown silt clay loam with increasing cobbles to a maximum depth explored of 6.5-feet. No bedrock or groundwater was encountered. The materials encountered in Test Pit #2 consisted of medium brown topsoil to 1-foot, underlain by light brown, dense silt clay loam to 4.5-feet, underlain by light brown silt clay loam with increasing cobbles to a maximum depth explored of 6.5-feet. No bedrock or 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 soil formed a ball and a ribbon between 1 and 2-inches in length before breaking. Soil structure shape was blocky and consistence was firm. Soil texture was smooth. We have researched soils in the area through USGS Web Soil Survey. The report is enclosed. The area of the proposed STA is identified by map unit symbol 65. The map unit name is Torrifluvents, nearly level. Typical soil profile consists of 0 to 36 inches loam, 36 to 60 inches consist of sand. The soil is consistent with Soil Type 3, 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. We are proposing a shallow installation of the STA, at approximately 2-feet below native grade. 1 Carla Ostberg holds a Certificate of Attendance and Examination from the CPOW Visual and Tactile Evaluation of Soils Training. Page 3 Test Pit #1 Backfill Test Pit #1, cobbles encountered starting at 6.5-feet / Sidewall Page 4 Length of ribbon between 1 and 2-inches View of Test Pit #1 Test Pit #2 Backfill Page 5 Test Pit #2 (slightly more dense sidewall) DESIGN SPECIFICATIONS The existing septic tank will be abandoned by pumping the tank and removing it. The void must be filled with onsite material, tamped in 1-foot lifts. The existing STA will be abandoned in place. Design Calculations: Average Design Flow = 75 GPD x 2 people/bedroom x 3 Bedrooms = 450 GPD LTAR = 0.35 GPD/SF 450 GPD / 0.35 GPD/SF = 1286 SF x 1.2 (gravity, bed) x 0.7 (chambers) = 1080 SF 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 has been established as 100’ (Finished Floor). CBO Inc. should be notified of any discrepancies or problems with grade elevations of proposed components during installation of the OWTS. OWTS Component Minimum Elevation Primary Tank Inlet Invert Approximate horizontal distance 5’ / min. 2% fall / min. 1.25” fall Distribution Box Approximate horizontal distance 22’ / min. 1% fall / min. 2.75” fall Infiltrative Surface Approximate horizontal distance 23’ to furthest bed / min. 1% fall to STA / min. 2.875” fall *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 1000-gallon, two-compartment Infiltrator® poly septic tank with an Orenco® Biotube effluent filter on the outlet tee. Any state-approved poly or concrete tank may be Page 6 substituted. Risers must bring the manhole lids to grade for access. If 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 two gravelless chamber beds. 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. A 4-inch diameter SDR-35 level manifold must be installed to connect each row of the chamber beds. The chamber beds will consist of 3 rows of 15 ‘Quick 4’ Infiltrator® chambers for a total of 90 chambers and 1080 square feet of infiltrative area. There must be at least 6-feet of undisturbed soil between each bed. There may be an exception where the existing septic tank was removed. We recommend the infiltrative area be placed at approximately 2-feet below native grade for a shallow installation. Inspection ports must be installed at each corner of the beds. 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 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. COMPONENT MANUFACTURER MODEL NO. COMMENTS Septic Tank Infiltrator® Item # IM1060-2CP Min. 1000-gallon, 2- compartment septic tank Effluent Filter Orenco® 4” diameter full size effluent filter Double-walled risers and lid Orenco® Risers and Lids Distribution Box, risers, lid and flow equalizers Polylok 2 ‘Roto-flow’ Chambers Infiltrator® ‘Quick 4’ Plus Standard Low Profile Chambers 90 low profile chambers 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. https://www.garfield-county.com/environmental-health/filesgcco/sites/16/OWTS-Application-Complete- Packet-Dec.-2019.pdf. If 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, 970-945-6614 x8150. Page 7 INSTALLATION CONTRACTOR CBO Inc. 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 Inc. 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 Inc. should be notified 48 hours in advance to observe the installation. In 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. 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. If an effluent filter or screen has been installed in the OWTS, we recommend this filter or screen be cleaned annually, or as needed. If 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. Page 8 ADDITIONAL CONSTRUCTION NOTES If 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. If soil conditions encountered are different from conditions described in report, CBO Inc. 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 Inc. Carla Ostberg, MPH, REHS 1. 5 ' 8. 1 ' 1- 1 / 4 " St a m p e d 50 " Ab a n d o n e d Wo o d B u i l d i n g Wo o d Ga r a g e Co n c r e t e Gr a v e l D r i v e w a y Me t a l Sh e d Wo o d Sh e d 19 1 4 C o u n t y R o a d 3 1 1 On e S t o r y Wo o d H o u s e Ab a n d o n e d We l l Po w e r P o l e & El e c t r i c M e t e r Co n c r e t e Cr a w l S p a c e En t r a n c e Cr a w l S p a c e En t r a n c e Pr o p a n e T a n k P o l e Se p t i c L i d Ir r i g a t i o n S t r u c t u r e Ma i l B o x 19 1 4 1. 4 ' 39 . 6 ' 11 1 . 0 ' 3. 7 ' 2. 4 ' Re c e p t i o n N o . 8 2 7 8 9 7 0. 8 8 3 ± A c r e s Gu y W i r e Fo u n d # 5 R e b a r & 1 - 1 / 4 " Ye l l o w P l a s t i c C a p S t a m p e d "E C L I P S E P L S 3 8 0 5 0 " 62 . 5 ' ~ 9' 6' 10 ' M I N ' 5' M I N DI S T R I B U T I O N B O X WI T H A C C E S S A T G R A D E 4" D I A S D R - 3 5 P V C S E W E R L I N E (M I N . 1 % F A L L T O D - B O X ) 4" D I A S D R - 3 5 I N S P E C T I O N P O R T A T E A C H C O R N E R O F B E D 4" D I A S D R - 3 5 P V C L E V E L M A N I F O L D TW O ( 2 ) ' Q U I C K - 4 ' L O W P R O F I L E C H A M B E R B E D S . E A C H BE D H A S 3 R O W S O F 1 5 C H A M B E R S = 9 0 C H A M B E R S A N D 10 8 0 S F I N F I L T R A T I V E A R E A . 4" D I A S D R - 3 5 S E W E R L I N E T O E A C H B E D (M I N . 1 % S L O P E T O B E D ) 4" D I A S D R - 3 5 S E W E R P I P E W I T H C L E A N O U T MI N 2 % F A L L T O T A N K 10 0 0 - G A L L O N , T W O - C O M P A R T M E N T SE P T I C T A N K W I T H E F F L U E N T S C R E E N 50 ' 10 0 ' 3- B E D R O O M RE S I D E N C E TP 1 TP 2 DRIVEWAY PR O P E R T Y L I N E WE L L W C O U N T Y R O A D 3 1 1 BM = 1 0 0 ' FF E L E V A T I O N TB D 6' M I N RE M O V E E X I S T I N G S E P T I C T A N K . B A C K F I L L W I T H N A T I V E SO I L , T A M P E D I N 1 ' L I F T S . A V O I D P L A C E M E N T O F S T A O V E R OV E R - E X C A V A T E D A R E A . 20 ' M I N Mi d d l e t o n R e s i d e n c e 19 1 6 C R 3 1 1 Ga r f i e l d C o u n t y , C o l o r a d o Pr o j e c t N u m b e r : C 1 8 6 3 Da t e : 0 2 / 0 7 / 2 0 2 4 De s i g n e d b y : C B O Dr a w n b y : D D Up d a t e : 0 5 / 3 1 / 2 0 2 4 Sh e e t 2 0 F 4 W2 . 0 CA L L 8 1 1 F O R UT I L I T Y L O C A T E S N SC A L E : 1 " = 2 0 ' - 0 " CB O I n c . 12 9 C a i n s L a n e Ca r b o n d a l e , C o l o r a d o 8 1 6 2 3 Ph o n e 9 7 0 . 3 0 9 . 5 2 5 9 ca r l a . o s t b e r g @ g m a i l . c o m Soil Map—Rifle Area, Colorado, Parts of Garfield and Mesa Counties Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/7/2024 Page 1 of 3 43 8 0 0 4 0 43 8 0 0 5 0 43 8 0 0 6 0 43 8 0 0 7 0 43 8 0 0 8 0 43 8 0 0 9 0 43 8 0 1 0 0 43 8 0 1 1 0 43 8 0 1 2 0 43 8 0 1 3 0 43 8 0 1 4 0 43 8 0 0 4 0 43 8 0 0 5 0 43 8 0 0 6 0 43 8 0 0 7 0 43 8 0 0 8 0 43 8 0 0 9 0 43 8 0 1 0 0 43 8 0 1 1 0 43 8 0 1 2 0 43 8 0 1 3 0 43 8 0 1 4 0 274610 274620 274630 274640 274650 274660 274670 274680 274690 274610 274620 274630 274640 274650 274660 274670 274680 39° 32' 28'' N 10 7 ° 3 7 ' 2 2 ' ' W 39° 32' 28'' N 10 7 ° 3 7 ' 1 8 ' ' W 39° 32' 25'' N 10 7 ° 3 7 ' 2 2 ' ' W 39° 32' 25'' N 10 7 ° 3 7 ' 1 8 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84 0 25 50 100 150 Feet 0 5 10 20 30 Meters Map Scale: 1:537 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Rifle Area, Colorado, Parts of Garfield and Mesa Counties Survey Area Data: Version 16, Aug 22, 2023 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Aug 25, 2021—Sep 5, 2021 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Soil Map—Rifle Area, Colorado, Parts of Garfield and Mesa Counties Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/7/2024 Page 2 of 3 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 3 Arvada loam, 1 to 6 percent slopes 0.5 37.4% 65 Torrifluvents, nearly level 0.8 62.6% Totals for Area of Interest 1.2 100.0% Soil Map—Rifle Area, Colorado, Parts of Garfield and Mesa Counties Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/7/2024 Page 3 of 3 Rifle Area, Colorado, Parts of Garfield and Mesa Counties 65—Torrifluvents, nearly level Map Unit Setting National map unit symbol: jnz3 Elevation: 5,000 to 7,000 feet Mean annual precipitation: 12 to 15 inches Mean annual air temperature: 46 to 48 degrees F Frost-free period: 90 to 120 days Farmland classification: Not prime farmland Map Unit Composition Torrifluvents and similar soils:85 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Torrifluvents Setting Landform:Distributaries, rivers, flood plains Down-slope shape:Linear, convex Across-slope shape:Linear, convex Parent material:Alluvium Typical profile H1 - 0 to 36 inches: loam H2 - 36 to 60 inches: sand Properties and qualities Slope:0 to 6 percent Depth to restrictive feature:More than 80 inches Drainage class:Moderately well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.60 to 2.00 in/hr) Depth to water table:About 12 to 36 inches Frequency of flooding:Occasional Frequency of ponding:None Calcium carbonate, maximum content:5 percent Gypsum, maximum content:1 percent Maximum salinity:Very slightly saline to moderately saline (2.0 to 8.0 mmhos/cm) Sodium adsorption ratio, maximum:2.0 Available water supply, 0 to 60 inches: Moderate (about 7.6 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7w Map Unit Description: Torrifluvents, nearly level---Rifle Area, Colorado, Parts of Garfield and Mesa Counties Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/7/2024 Page 1 of 2 Hydrologic Soil Group: C Hydric soil rating: No Minor Components Wann Percent of map unit:10 percent Landform:Terraces Hydric soil rating: Yes Fluvaquents Percent of map unit:5 percent Landform:Marshes Hydric soil rating: Yes Data Source Information Soil Survey Area: Rifle Area, Colorado, Parts of Garfield and Mesa Counties Survey Area Data: Version 16, Aug 22, 2023 Map Unit Description: Torrifluvents, nearly level---Rifle Area, Colorado, Parts of Garfield and Mesa Counties Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 2/7/2024 Page 2 of 2 2,257 376.2 Map Viewer This product is for informational purposes and may not have been prepared for, or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information. 1,7541: Feet2920 Legend 146 Notes Location 292 Date Prepared: 2/7/2024 1:47:16 PM Well Constructed Final Permit Ground Water Geophysical Log Confluence Point Source Water Route Framework County Gareld County, CO Developed by Account Number  R083274 Parcel Number  217912300737 Acres 1 Land SqFt 0 Tax Area 023 2019 Mill Levy 65.5390 Physical Address  1914 311 COUNTY RD   SILT 81652 Owner Address  MIDDLETON, GUY 1912 COUNTY ROAD 311 NEW CASTLE CO 81647 2019 Total Actual Value  $310,610 Last 2 Sales Date  Price   n/a  $   n/a  $   Date created: 8/18/2023 Last Data Uploaded: 8/18/2023 2:06:54 AM 187 ft Overview Legend Parcels Roads Parcel/Account Numbers Owner Name Lakes & Rivers County Boundary Line 1. 5 ' 8. 1 ' 1- 1 / 4 " St a m p e d 50 " Ab a n d o n e d Wo o d B u i l d i n g Wo o d Ga r a g e Co n c r e t e Gr a v e l D r i v e w a y Me t a l Sh e d Wo o d Sh e d 19 1 4 C o u n t y R o a d 3 1 1 On e S t o r y Wo o d H o u s e Ab a n d o n e d We l l Po w e r P o l e & El e c t r i c M e t e r Co n c r e t e Cr a w l S p a c e En t r a n c e Cr a w l S p a c e En t r a n c e Pr o p a n e T a n k P o l e Se p t i c L i d Ir r i g a t i o n S t r u c t u r e Ma i l B o x 19 1 4 1. 4 ' 39 . 6 ' 11 1 . 0 ' 3. 7 ' 2. 4 ' Re c e p t i o n N o . 8 2 7 8 9 7 0. 8 8 3 ± A c r e s Gu y W i r e Fo u n d # 5 R e b a r & 1 - 1 / 4 " Ye l l o w P l a s t i c C a p S t a m p e d "E C L I P S E P L S 3 8 0 5 0 " 62 . 5 ' ~ 9' 6' 10 ' M I N ' 5' M I N DI S T R I B U T I O N B O X WI T H A C C E S S A T G R A D E 4" D I A S D R - 3 5 P V C S E W E R L I N E (M I N . 1 % F A L L T O D - B O X ) 4" D I A S D R - 3 5 I N S P E C T I O N P O R T A T E A C H C O R N E R O F B E D 4" D I A S D R - 3 5 P V C L E V E L M A N I F O L D TW O ( 2 ) ' Q U I C K - 4 ' L O W P R O F I L E C H A M B E R B E D S . E A C H BE D H A S 3 R O W S O F 1 5 C H A M B E R S = 9 0 C H A M B E R S A N D 10 8 0 S F I N F I L T R A T I V E A R E A . 4" D I A S D R - 3 5 S E W E R L I N E T O E A C H B E D (M I N . 1 % S L O P E T O B E D ) 4" D I A S D R - 3 5 S E W E R P I P E W I T H C L E A N O U T MI N 2 % F A L L T O T A N K 10 0 0 - G A L L O N , T W O - C O M P A R T M E N T SE P T I C T A N K W I T H E F F L U E N T S C R E E N 50 ' 10 0 ' 3- B E D R O O M RE S I D E N C E TP 1 TP 2 DRIVEWAY PR O P E R T Y L I N E WE L L W C O U N T Y R O A D 3 1 1 BM = 1 0 0 ' FF E L E V A T I O N TB D 6' M I N RE M O V E E X I S T I N G S E P T I C T A N K . B A C K F I L L W I T H N A T I V E SO I L , T A M P E D I N 1 ' L I F T S . A V O I D P L A C E M E N T O F S T A O V E R OV E R - E X C A V A T E D A R E A . 20 ' M I N Mi d d l e t o n R e s i d e n c e 19 1 6 C R 3 1 1 Ga r f i e l d C o u n t y , C o l o r a d o Pr o j e c t N u m b e r : C 1 8 6 3 Da t e : 0 2 / 0 7 / 2 0 2 4 De s i g n e d b y : C B O Dr a w n b y : D D Up d a t e : 0 5 / 3 1 / 2 0 2 4 Sh e e t 2 0 F 4 W2 . 0 CA L L 8 1 1 F O R UT I L I T Y L O C A T E S N SC A L E : 1 " = 2 0 ' - 0 " CB O I n c . 12 9 C a i n s L a n e Ca r b o n d a l e , C o l o r a d o 8 1 6 2 3 Ph o n e 9 7 0 . 3 0 9 . 5 2 5 9 ca r l a . o s t b e r g @ g m a i l . c o m