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HomeMy WebLinkAboutOWTS Design Packet 10.17.2020CBO.I October 17, 2020 33 FOUR WHEEL DRIVE ROAD CARBONDALE, CO 81 623 970.309.5259 CARLA.OSTBERG@GMAI L. COM Evan Schreiber evan@lightboxdevelopment.com Subsurface Investigation and Onsite Wastewater Treatment System Design 3-Bedroom Residence + 1-Bedroom ADU Lot 10, Ranch at Coulter Creek Garfield County, Colorado Evan, Project No. C1547 CBO Inc. performed a subsurface investigation and completed an onsite wastewater treatment system (OWTS) design for the subject residence. The 4.46-acre property is located outside of Carbondale, in an area where OWTSs are necessary. Previous design documents dated September 6 and September 18, 2020 should be discarded and replaced with these that more accurately describe the proposed development. The soil treatment area (STA) is located entirely within the building envelope and the proposed pond location has shifted to the north to accommodate the required 10-foot separation between the lined pond and any portion of the OWTS. Legal Description: Section: 6 Township: 7 Range: 87 Subdivision: RANCH AT COULTER CREEK PUD Lot: 10 AS PER FIRST AMENDED FINAL PLAT RECEPTION NUMBER 889891 Parcel ID: 2391-063-01-010 SITE CONDITIONS The property is currently undeveloped. A 3-bedroom residence and detached studio are proposed. The structures will be served by potable water by a community water system. The water line will enter the property from the north and will not come within 25-feet of any OWTS component. Landscaping, including a pond and planting of additional trees, are proposed. We have included the landscaping plan on our drawings to assure these features do not conflict with placement of the OWTS components. No OWTS component can come within 10-feet of the lined pond. The proposed soil treatment area (STA) has an approximate 7% slope to the south. The area is covered with native grasses. No trees will be planted over the STA. 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 We were provided LKP Engineering, Inc. Soil and Foundation Investigation report dated July 18, 2018 (which may be a typo with actual date being 2019). LKP described two test pits. Soils encountered in Test Pit #2 are described on page 12 (Figure 2) of the enclosed report. Our findings are consistent with those documented in the LKP report. Page 2 The subsurface was investigated on August 11, 2020 by digging two soil profile test pit excavations (Test Pits). A visual and tactile soil analysis was completed by Carla Ostberg.1 Note that Test Pit #1 was shallow, encountering basalt boulders at 3-feet. Test Pit #1 was excavated in the area of the proposed ADU. The materials encountered in the Test Pit #2 consisted of dark brown topsoil to 2.5-feet, underlain by tan calcareous clay matrix to a maximum depth explored of 8.0-feet. No bedrock or groundwater was encountered. The materials encountered in the Test Pit #3 were consistent with those encountered in Test Pit #2. Test Pit #2 was excavated to a maximum depth explored of 8.0-feet. No bedrock or groundwater was encountered. A sample of the soils was taken from Test Pit #1 at 3-feet below grade. The soil formed a ball and a ribbon less than 1-inch in length before breaking. Soil structure shape was blocky and consistence was friable to firm. Soil texture was both gritty and smooth. Soils in the calcareous clay matrix were dense. STA sizing is based on Soil Type 2A, Loam. A long term acceptance rate (LTAR) of 0.5 gallons per square foot will be used to design the OWTS. Test Pit #2 ' Carla Ostberg holds a Certificate of Attendance and Examination from the CPOW Visual and Tactile Evaluation of Soils Training. Page 3 View of approx. STA Test Pit #3 DESIGN SPECIFICATIONS Design Calculations: Average Design Flow = 75 GPD x 2 people/bedroom x 4 Bedrooms = 600 GPD LTAR = 0.5 GPD/SF 600 GPD / 0.5 GPD/SF x 1.0 (gravity trenches) x 0.7 (chambers) = 840 SF The OWTS design is based on 3-bedrooms in the main house and detached studio. While the detached studio will not include a bedroom, we are sizing the OWTS for a future potential bedroom. An average daily wastewater flow of 600 GPD will be used. For the purposes of this OWTS design, Benchmark Elevation has been established as 100' as the sewer line existing the studio. It should be noted that the sewer line exiting the main house is at a lower elevation and will tie into the studio sewer line. CBO Inc. should be notified of any discrepancies or problems with grade elevations of proposed components during installation of the OWTS. Page 4 OWTS Component Minimum Elevation Primary Tank Inlet Invert Approx. horizontal distance 155' / min. 2% fall to septic tank / min. 38.75" fall from studio to septic tank Distribution Box Approx. horizontal distance 85' / min. 1 % fall to distribution box / min. 10.625" fall from septic tank to distribution box Infiltrative Surface Approx. horizontal distance 10' to highest trench / min. VA fall to highest trench / min. 1.25" from distribution box to highest trench The sewer line exiting the residences must have a double -sweep clean out and a minimum 2% grade to the septic tank. The sewer line from the main residence will tie into the sewer line serving the studio with a "wye" fitting. An additional clean out should be installed at the point the sewer lines tie together. The system installation must include a 1250-gallon, two -compartment concrete septic tank with an effluent filter on the outlet tee. 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 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 bed. Each trench will consist of 14 `Quick 4' Standard Plus Infiltrator® chambers for a total of 840 square feet of infiltrative area. There must be at least 4-feet of undisturbed soil between each trench. Chambers must be installed below the topsoil horizon. Inspection 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 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 Valley Precast 1250T-2CP 1250-gallon, 2- compartment concrete septic tank Biotube Effluent Filter Orenco® Full Size Effluent Filter and housing Tank Risers and Lids Orenco® Double -walled PVC Risers and Lids (24" diameter) Distribution Box Valley Precast D-Box 8C Concrete distribution box Flow Equalizers 3049 Equalizer 4 Flow Equalizers Chambers Infiltrator® Standard Plus 52 `Quick 4' Chambers The component manufacturers are typical of applications used by contractors and engineers in this area. Alternatives may be considered or recommended by contacting our office. 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. Page 5 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 6 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 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. 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CIVILIGEOTECHNICAL SOIL AND FOUNDATION INVESTIGATION FOR A PROPOSED SCHREIBER RESIDENCE LOT 10, THE RANCH AT COULTER CREEK PUD AT MEADOW CIRCLE AND CATTLE CREEK RIDGE ROAD GARFIELD COUNTY, COLORADO PROJECT NO. 19-3347 JULY 24, 2018 w . 2952••• • 'NAB PREPARED FOR: WHIT WHITAKER WRW LOGWORKS, LLC 1009 CATTLE CREEK RIDGE ROAD CARBONDALE, CO 81623 P.O. Box 724, Eagle, CO 81631 Tel. (970) 390-0307 www.LKPEngineering.com TABLE OF CONTENTS EXECUTIVE SUMMARY 2 SCOPE OF STUDY 2 SITE DESCRIPTION 2 PROPOSED CONSTRUCTION 3 FIELD INVESTIGATION 3 SUBSURFACE SOIL AND GROUNDWATER CONDITION 3 FOUNDATION RECOMMENDATIONS 4 SLAB CONSTRUCTION 5 RETAINING WALLS 5 UNDERDRAIN SYSTEM 6 SITE GRADING AND DRAINAGE 6 LAWN IRRIGATION 7 LIMITATION 7 FIGURES LOCATION SKETCH DRAWING NO. 1 SUBSURFACE EXPLORATION LOGS FIGURE NO's 1-2 SWELL -CONSOLIDATION FIGURE NO. 3 PERIMETER DRAIN DETAIL FIGURE NO. 4 P.O. Box 724, Eagle, CO 81631 Tel (970) 390-0307 www.lkpengineering.com EXECUTIVE SUMMARY The proposed residence should be supported with conventional type spread footings, designed for an allowable soil bearing pressure of 3000 psf. They should construct the footings on the undisturbed sandy clay with some gravel. See Foundation Recommendations. SCOPE OF STUDY This report presents the results of a subsurface Soil and Foundation Investigation for a proposed residence to be constructed on Lot 10, The Ranch at Coulter Creek PUD, at Meadow Circle and Cattle Creek Ridge Road, Garfield County, Carbondale, Colorado. The purpose of the subsurface soil and foundation investigation was to determine the engineering characteristics of the foundation soil and to provide recommendations for the foundation design, grading, and drainage. Geologic hazard studies are outside of our scope of services. SITE DESCRIPTION Lot 10, The Ranch at Coulter Creek PUD is 4.460 acres (according to the survey by Rodney P. Kiser, PLS, emailed by Whit) and it is located at the southwest corner of Cattle Creek Ridge Road and Meadow Circle, Carbondale, Garfield County, Colorado. Vegetation within the proposed building site consisted of tall grass. The topography within the selected building area (where the two test pits had been dug) was moderate with average slopes from about 10 to 20 percent. Drainage is to the south and southeast. Meadow Circle runs along the east half of the LKP Engineering, Inc. 3 northern property line and Cattle Creek Ridge Road runs along the eastern property line. Lot 10 was vacant. PROPOSED CONSTRUCTION We have assumed that the proposed residence will be two story, wood frame construction with a possible basement, on a concrete foundation, with an attached garage. We anticipate loads to be light, typical of residential construction. If the finalized plans differ significantly from the above understanding, they should notify us to reevaluate the recommendations of this report. FIELD INVESTIGATION The field investigation, conducted on July 18, 2019, consisted of logging and sampling two test pits. Approximate locations of the test pits are shown on Drawing No. 1. We show the soil profile of the test pits on the Subsurface Exploration Logs, Figure No's 1 and 2. Soil samples for laboratory soil analysis and observation were taken at selected intervals. We understand that your excavator dug the test pits with a mini excavator on rubber tracks prior to our site visit. SUBSURFACE SOIL AND GROUNDWATER CONDITION The soil profiles encountered in the two test pits were not uniform. Test Pit No. 1 had about a foot of topsoil over reddish -brown, calcareous, clayey matrix with large, basalt cobbles and boulders to the maximum depth explored of 3 feet, where a practical mini ex refusal was encountered. Test Pit No. 2 had about 1.5 feet of topsoil over blocky clay to about 2.5 over light brown, calcareous, gypsiferous, sandy, gravelly clay to about 5 feet over light brown, calcareous, sandy clay with some gravel to the maximum depth explored of 8 feet. Ground water or bedrock LKP Engineering, Inc. 4 were not encountered in the test pits. We sampled the soil in the test pits at random intervals. The samples were tested for natural moisture content, swell -consolidation potential, and natural dry density. The test results are shown on Figure 3. The soil samples had high moisture content of 22.6 and 20.7 percent. The high moisture content might mask possible swelling potential of the clay soils. Swelling soils were encountered on the surrounding lots. FOUNDATION RECOMMENDATIONS The proposed residence should be supported with conventional type spread footings, designed for an allowable soil bearing pressure of 3000 psf. They should construct the footings on the undisturbed sandy clay with some gravel, below the topsoil and blocky clay. The soil samples from test pit 2 at 4 and 8 feet, had high moisture content of 22.6 and 20.7 percent respectively. The high moisture content might mask possible swelling potential of the clay soils. Swelling soils were encountered on the surrounding lots. The completed foundation excavation should be observed and tested by the undersigned engineer to verify that the soil conditions encountered during construction are as anticipated in this report. If swelling soils are encountered during the open hole observation, the foundation will have to be redesigned to account for the soil conditions prevailing in the foundation excavation. We recommend a minimum width of 16 inches for the continuous footings and 2 feet for the isolated footing pads. Continuous foundation walls should be reinforced top and bottom to span an unsupported length of at least 10 feet. The proposed foundation should be set at a minimum depth of four feet below the finished grade or at the minimum depth required by the local building code. The foundation excavation should be free from excavation spoils, frost, organics and standing water. We recommend proof -rolling of the foundation excavation. Soft spots detected during the proof - rolling, should be removed by overexcavation. Any overexcavation within the proposed foundation should be backfilled, in 8 inches loose level lifts and compacted to 100% of the LKP Engineering, Inc. 5 maximum dry density and within 2 percent of the optimum moisture content as determined in a laboratory from a Standard Proctor test (ASTM D-698). A structural fill, placed under footings should be tested by a qualified professional. SLAB CONSTRUCTION The natural on -site soils, exclusive of topsoil and organics, are suitable to support lightly loaded slab -on -grade construction. The subgrade for the slab -on -grade construction should be proof compacted to detect and remove soft spots. They should backfill overexcavated soft spots and other underslab fill with the on -site soil, free from topsoil and organics, or other suitable material, compacted to a minimum of 95 percent of the maximum standard Proctor density (ASTM D-698). Suitable material should be free from topsoil, organics and rock fragments greater than 3 inches. The concrete slab should be constructed over a 4-inch layer of clean gravel consisting of -3/4 inch gravel with at least 50% retained on the No. 4 sieve and less than 3 percent passing the No. 200 sieve. They should reinforce the concrete slab -on -grade and score control joints according to the American Concrete Institute requirements and per the recommendations of the designer to reduce damage due to shrinkage. The concrete slab should be separated from the foundation walls and columns with expansion joints to allow for independent movement without causing damage. RETAINING WALLS Foundation walls retaining earth and retaining structures that are laterally supported should be designed to resist an equivalent fluid density of 60 pcf for an "at -rest" condition. Laterally unrestrained structures, retaining the on -site earth, should be designed to resist an LKP Engineering, Inc. 6 equivalent fluid density of 40 pcf for the "active" case. The above design recommendations assume drained backfill conditions and a horizontal backfill surface. Surcharge loading due to adjacent structures, weight of temporary stored construction materials and equipment, inclined backfill and hydrostatic pressure due to undrained backfill should be incorporated in the design. They should try to prevent the buildup of hydrostatic pressure behind the retaining wall. Passive earth pressure of 360 psf can be used for the lateral pressure against the sides of the footings. Resistance to sliding at the bottom of the footings can be calculated based on a coefficient of friction of 0.5. Undisturbed soil or a structural fill compacted to 100 percent of the maximum dry density and within 2 percent of the optimum moisture content will be used to resist lateral loads at the sides of the footings. UNDERDRAIN SYSTEM To reduce the risk of surface water infiltrating the foundation subsoil, we recommend installation of a foundation perimeter drain (see Figure No. 4). The foundation perimeter drain should consist of a 4-inch diameter, perforated pipe, sloped to a suitable gravity outlet, at a 1/4 inch per foot for flexible or at a 1/8 of an inch for rigid pipe. The bottom of the trench adjacent to the footing should be lined with a polyethylene moisture barrier glued to the foundation wall. The drain pipe should be covered with a minimum of 6 inches of -3/4-inch free -draining granular material. Geotextile (Mirafi 140N or equivalent) should be used to cover the free - draining gravel to prevent siltation and clogging of the drain. The backfill above the drain should be granular material to within 2 feet of the ground surface to prevent a buildup of hydrostatic pressure. SITE GRADING AND DRAINAGE The following recommendations are general. Exterior backfill should be compacted at or near the optimum moisture content to at least 95% of the maximum standard Proctor density LKP Engineering, Inc. 7 under pavement, sidewalk and patio areas and to at least 90% of the maximum standard Proctor density under landscaped areas. They should use mechanical methods of compaction. Do not puddle the foundation excavation. The site surrounding the building structure should slope away from the building in all directions. A minimum of 12 inches in the first 10 feet is recommended in unpaved areas, and three inches in the first 10 feet in paved areas. The top of the granular foundation backfill should be covered with a minimum of 1 foot of relatively impervious fill to reduce the potential of surface water infiltrating the foundation subsoils. Surface water naturally draining toward the proposed building site should be diverted around and away from it by means of drainage swales or other approved methods. The roof drains and downspouts should extend and discharge beyond the limits of the backfill. LAWN IRRIGATION It is not recommended to introduce excess water to the foundation soils by installing sprinkler systems next to the building. The installation of the sprinkler heads should insure that the spray from the heads will not fall within 10 feet of foundation walls, porches or patio slabs. Lawn irrigation must be controlled. LIMITATION This report has been prepared according to locally accepted Professional Geotechnical Engineering standards for similar methods of testing and soil conditions at this time. The type of soil testing was selected by the owner and general contractor as the preferred method for the soil and foundation investigation over a soil and foundation investigation with a drill rig. There is no other warranty either expressed or implied. The findings and recommendations of this report are based on field exploration, laboratory testing of samples obtained at the specific locations shown on the Location Sketch, Drawing No.1 and on assumptions stated in the report. Soil conditions at other locations may LKP Engineering, Inc. 8 vary, which may not become evident until the foundation excavation is completed. If soil or water conditions seem different from those described in this report we should be contacted immediately to reevaluate the recommendations of this report. We are not responsible for technical interpretation by others of the data presented in this report. This report has been prepared for the exclusive use of Whit Whitaker, for the specific application to the proposed Schreiber Residence on Lot 10, The Ranch at Coulter Creek PUD, at Meadow Circle and Cattle Creek Ridge Road, Carbondale, Garfield County, Colorado. Sincerely, LKP ENGINEERING, INC. Luiza Petrovska, PE pREGi • 29526 ; o -a •• : 4 � Mira. 7:A WP X4-LKP\ 2019\19-3347CLAY-SAND-BASALT-PITS.DOCX LKP Engineering, Inc. 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Box 724, Eagle, CO 81631 Tel (970) 390-0307 www.LKPEngineering.com LOCATION SKETCH LOT 10, THE RANCH AT COULTER CREEK PUD CATTLE CREEK RIDGE ROAD GARFIELD COUNTY, COLORADO PROJECT NO.: 19-3347 SCALE: -1"=60' DRAWING NO.: 1 DATE OBSERVED: JULY 18, 2019 Test Pit # 1 ELEVATION: DEPTH FEET S Y M B O L S A M P L E DESCRIPTION OF MATERIAL AND SAMPLE LOCATION LABORATORY TEST RESULTS REMARKS 5 Topsoil i / 1, Reddish —brown, calcareous, clayey matrix with large, basalt cobbles and boulders 0 0 Refusal on basalt rocks ® 3 feet No Ground Water Encountered 10 15 20 LEGEND: ❑ - 2—inch O.D. California Liner Sample • — Bulk Sample DD — Natural Dry Density (pcf) MC — Natural Moisture Content (X) —200 — Percent Passing No. 200 Sieve LL — Liquid Limit PI — Plasticity Index GW — Ground water LKP ENGINEERING, INC. SUBSURFACE EXPLORATION LOG PROJECT NO.: 19-3347 FIGURE Na: 1 DATE OBSERVED: JULY 18, 2019 Test Pit # 2 ELEVATION: DEPTH FEET S Y M B O L S A M P L E DESCRIPTION OF MATERIAL AND SAMPLE LOCATION LABORATORY TEST RESULTS REMARKS 5 t%) Topsoil r/' Brown, blocky clay i ❑ Whitish to light brown, calcareous, gypsiferous, sandy, gravelly clay DD= 84.2 pcf MC= 22.6 % 10 i r / // /i ❑ Light brown, calcareous, sandy, clay with some gravel DD= 91.0 pcf MC= 20.7 X Bottom of Test Pit ® 8 feet No Ground Water Encountered 15 20 LEGEND: o - 2—inch 0.D. California Liner Sample • — Bulk Sample DD — Natural Dry Density (pcf) MC — Natural Moisture Content (9) —200 — Percent Passing No. 200 Sieve LL — Liquid Limit PI — Plasticity Index GW — Ground water LKP ENGINEERING, INC. SUBSURFACE EXPLORATION LOG PROJECT NO.: 19.3347 FIGURE NO.: 2 0 0 W Compression .o 0 0 W 0 Compression 3 2 1 0 — 1 —2 — 3 — 4 3 2 1 0 — 1 — 2 — 3 — 4 OMPRESSION CONSTANT PRESSURE WHEN WETTED UNDER OF 1000 PSF 0.1 1 0 10 100 APPLIED PRESSURE — ksf Sample of.• Tan —grayish, silty, sandy Clay From: Test Pit 2 at 4 feet Natural Dry Unit Weight = 84.5 pcf Natural Moisture Con ten t = 22.6 percent NO UNDER OF MOVEMENT 1000 CONSTANT PSF WHEN WETTED PRESSURE _ _ 0.1 1 0 10 100 APPLIED PRESSURE — ksf Sample of.• Light brown, sandy, calcareous clqay From: Test Pit 2 at 8 feet Natural Dry Unit Weight = 91.9 pcf Natural Moisture Content = 20.7 percent LKP Engineering, Inc. PROJECT NO.: 19-3347 Swell — Consolidation Test Results FIGURE NO.: 3 n p D . ° D D ° DD SLOPE AWAY FROM BUILDING OVER BACKFILL WITH A MINIMUM OF ONE FOOT OF RELATIVELY IMPERVIOUS SOIL ° FOOTING p . D D o - 30 MIL MINIMUM THICKNESS PLASTIC LINER, GLUED TO TH FOUNDATION WALL ° GRANULAR FILL o� 0 ^O o� V O / ILTER FABRIC (MIRAFI 140N OR EQUIVALENT) \• O/\ INUS 3/4-INCH DIAMETER, COARSE, \ /\ / CLEAN CRUSH ROCK -INCH DIAMETER PERFORATED PIPE SLOPED TO A DAYLIGHT LOCATION AWAY FROM THE FOUNDATION AT 1/4-INCH PER FOOT FOR FLEXIBLE AND 1/8-INCH MINIMUM FOR RIGID PIPE CIVIL/GEOTECHNICAL Engineering, Inc. P.O. Box 724, Eagle, CO 81631 Tel (970) 390-0307 www.LKPEngineering.com PERIMETER DRAIN LOT 10, THE RANCH AT COULTER CREEK PUD CATTLE CREEK RIDGE ROAD GARFIELD COUNTY, COLORADO PROJECT NO.: 19-3347 SCALE: N.T.S. FIGURE NO.: 4 Lor 9 Lor 9 V£D 20Q'tPW�Y -589°4�49"£ /� // 7/ // /� N /\ / / / / / / r---/ // // 7 / /— 7 , 4.0— / / / / / / / / / / / / _/ 7 J / / / / / // 7 / �— // ////7 // /�— /// / ��`�� / 1I // // / / / / // /// // / /7 ///i /—�/ �OUNDR£3AREr1 1/4" -7�56 �/l / / / / / / // // // // / 7/ // // /// —-- — OIRANGE PLASTIC CAP — / /l / / / / / / / / / 7 / / / f (7� / / / LS28643 - -- / Vj£�UpoiNr// i—/ // // //// // // /// //// //l.�" /// --_ i �GROUND:74 e54 / / / / / / / / / / / i /1� - / / / 2 1 r• / / / O PINYON !\.` / i / / / / / / / / / i `En _ _4 --_— _ \ — -Oa �� �_ yr o.. M Lor 8 NOTICE: ACCORDING TO COLORADO LAW YOU MUST COMMENCE ANY LEGAL ACTION BASED UPON ANY DEFECT IN THIS SURVEY WITHIN THREE YEARS AFTER YOU FIRST DISCOVER SUCH DEFECT. IN NO EVENT MAY ANY ACTION BASED UPON ANY DEFECT IN THIS SURVEY BE COMMENCED MORE THAN TEN YEARS FROM THE DATE OF CERTIFICATION SHOWN HEREON. 0 - 7 FOUND RE8AR Er 1-1/4" ORANGE PLASTIC CAP LS28643 �/ -- 77 7/7— // / / / / / / / �� // //—�-- /�i/,�=I// // / / / / / / / // // _/�i / / / / / / 7 / i --- / / / / / / / / / 7� i7—/ / / / / / / / // / 7 �7 / 7— / / / / / / / / 7 �7 / / / �--- �i 7 / / / / 7 / / /i _-- �— / 7 / / / 7 / 7 -- - i- _.- �/ 7 / / / 7 // /— / / ./ _ — - — .// / / / / / / / — / / / / / _ — ' 28 i FOUND RE3AR Er 1-1/4" ORANGE PLASTIC CAP LS28643 / MEADOW CIRCLE L=105.16' 2= 50.00' C' .S0. 3 7' / / / / 7 7 / 1 �50 / / 7 7 7 20� 7 // / // // // /-------\� 7 / 7/ 7 7 / / �5,/ // 7 / // // // // // // —/ // \�— / 7 / / / / / EXISTING CONDITIONS SURVEY LOT 10- THE RANCH AT COULTER CREEK P.U.D. 7 7 7 SECTION 1, TOWNSHIP 7 SOUTH, RANGE 88 WEST OF THE 6TH PM SECTION 6, TOWNSHIP 7 SOUTH, RANGE 87 WEST OF THE 6TH PM COUNTY OF GARFIELD, STATE OF COLORADO 7 7 J — — / kin:1, 1G rVEL E /'L / / / 7 SOUND R£3AR Er 2 3�L(` — — — / / ELASTIC CAP LS28643 — �� / / / / / / / 7.7 / / / / / - / / Ct'i6A\L 3UILDING \ / — -- / / / / / / / £NV£L}----- \ / / ��J ---// / / / / // 7/ // // �� \ / / / / / // / / / // /-----�i-�_ \ \ -- \ \ �N 0 FOUND RE13Al2 Er 1-1/4" ORANGE PLASTIC CAP LS28643 \ \ 7 \ \� 7 \7 - 7 \ — — �7 77 \ \ \ 7 • 7 \ \ \ \ \ \ 7 7 7 \ —•7435-------- ti %--/— // 7 / / / /, / — / / - 7430 / ^/ / / / / ---- 7 / // I/ / // /---------- \ Sours- 1/16 CORNER SECTIONS 1 Er 6 FOUND 3 -1/4" BUN ALUMINUM CAP 1985 SITE BENCHMARK ELEVATION: 7431.66 O i i — — — \ • O 7 1 - NO \\ \ \ \ \ \\ \ \\ \\ \\ \\ \ \ \\ \ \ \ \ — — — — \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \ \ \ \ \ \ \ \ \\\ \\ \ \\ \\ \\\ \ \\ \\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \\ \ \\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \ \\ \ \ \ \ \ \ \ \ � \ \ \\\ \\ \\\ \\\ \\ \ \ — 7 \ \ \ \ \ \ 7 \ \ 7 \ \ \ \ \ \ \ \ 7 \ \ —�\\ \\\ \\ \\ \\ \\\ \ \ \ \ 7 \ \ — — 7425- — — — — \ \ \ \ \ 7- \ \ \ \ \ 7 ' \ \ \ \ 7 _ _ _ — — — — — — — \ \ \ — \ \ \ 3a910 ----- — S7g 229 3Ea21NGS) (3ASIS 0� 420- 7 — FOUND RE3AR Er 1-1/4" ORANGE PLASTIC CAP LS28643 Lor zY FOUND RE3AR Er 1-1/4" ORANGE PLASTIC CAP LS28643 \ LEGEND ELECriRICAL TRANSFORMER TELEPHONE PEDESTAL 0 40' 20' 80' SCALE: 1 " = 40' PROPERTY DESCRIPTION: LOT 10 THE RANCHES AT COULTER CREEK P.U.D. ACCORDING TO THE 1ST AMENDMENT OF FINAL PLAT THEREOF RECORDED MARCH 7, 2017 AS RECEPTION NO. 889891. COUNTY OF GARFIELD, STATE OF COLORADO SURVEY NOTES: 1. BASIS OF BEARINGS FOR THIS SURVEY IS A BEARING OF S78°22'29"W ALONG THE SOUTHERLY PROPERTY LINE BETWEEN A FOUND REBARS & 1-1/4" ORANGE PLASTIC CAPS LS28643 AS SHOWN HEREON. 2. DATE OF FIELD SURVEY: MAY 7, 2019. 3. LINEAR UNITS USED TO PERFORM THIS SURVEY WERE U.S. SURVEY FEET. 4. THIS SURVEY IS BASED ON THE RANCHES AT COULTER CREEK P.U.D. 1ST AMENDMENT OF FINAL PLAT RECORDED RECORDED MARCH 7, 2017 AS RECEPTION NO. 889891 AND CORNERS FOUND IN PLACE AS SHOWN HEREON. 5. CONTOUR INTERVAL EQUALS 1 FOOT. 6. ELEVATIONS SHOWN HEREON ARE BASED ON GPS OBSERVATIONS UTILIZING THE CONTINUOUS OPERATING REFERENCE STATIONS (CORS) THROUGH THE MESA COUNTY RTVRN NETWORK BROAD CASTING NORTH AMERICAN VERTICAL DATUM (NAVD88) YIELDING AN ON -SITE BENCHMARK ELEVATION OF 7431.66. SURVEYOR'S STATEMENT I, RODNEY P. KISER, DO HEREBY STATE THAT THIS EXISTING CONDITIONS SURVEY WAS PREPARED BY TRUE NORTH COLORADO, LLC. FOR EVAN SCHREIBER THAT SAID SURVEY WAS PREPARED BY ME OR UNDER MY SUPERVISION AND RESPONSIBLE CHARGE AND THAT IT IS TRUE AND CORRECT TO THE BEST OF MY BELIEF AND KNOWLEDGE. RODNEY P. KISER LICENSED PROFESSIONAL LAND SURVEYOR COLORADO REGISTRATION NO. 38215 TRUE NORTH COLORADO A LAND SURVEYING AND MAPPING COMPANY EVAN SCHREIBER EXISTING CONDITIONS SURVEY LOT 10 - THE RANCHES AT COULTER CREEK P.U.D. COUNTY OF GARFIELD - STATE OF COLORADO TRUE NORTH COLORADO LLC. A LAND SURVEYING AND MAPPING COMPANY PO BOX 614 - 529 S. WILD HORSE DRIVE NEW CASTLE, COLORADO 81647 (970) 984-0474 www.truenorthcolorado.com PROJECT NO: 2019-164 DATE: MAY 19, 2019 DRAWN RPK SURVEYED LDV SHEET 1OF1 Item 1250T-2CP 1250 Gallon Top Seam - 2CP DESIGN NOTES • Design per performance test per ASTM C1227 • Top surface area 56.25 ft2 • f'c ® 28 days; concrete = 6,000 PSI Min. Installation: • Tank to be set on 5" min. sand bed or pea gravel • Tank to be backfilled uniformly on all sides in lifts less than 24" and mechanically compacted • Excavated material may be used for backfill, provided large stones are removed • Excavation should be dewatered and tank filled with water prior to being put in service for installation with water table less than 2' below grade • Meets C1644-06 for resilient connectors • Inlet and Outlet identified above pipe • Delivered complete with internal piping ALLOWABLE BURY (Based on Water Table) WATER TABLE ALLOWABLE EARTH FILL 0'-0" 2'-0" 1'-0" 3'-0" 2'-0" 3'-0" 3'-0" 4'-0" DRY 4'-0" 135" Top View • Section View Digging Specs Invert Dimensions Net Capacity Net Weight 13' Long x 7' Wide 56" below inlet Inlet Outlet Length Width Height Inlet Side Outlet Total Lid Tank Total 56" 53" 135" 60" 68" 843 gal 416 gal 1259 gal 3120 Ibs 10880 Ibs 14000 Ibs O VALLEY - , ❑ PRECAST, Inc. Buena Vista, Colorado Phone: 719-395-6764 Fax: 719-395-3727 Website: www.valleyprecastcom Email: frontdesk©valleyprecastcom Residential Biotube® Effluent Filters Applications Our patented* 4-in. (100-mm) Biotube Effluent Filters, Biotube Jr., Biotube Insert Filters, and Biotube Base Inlet Filters are ideal for residential septic tanks and have a lifetime warranty. They prevent large solids from leaving the tank, dramatically improving wastewater quality and extending the life of residential drainfields. 4-in. (100-mm) Biotube Effluent Filter 4-in. (100-mm) Biotube Jr. (4-in. Biotube cartridge avail- able separately as Insert Filter) 8-in. (200-mm) 4-in. (100-mm) Base Inlet Filter Insert Filter Orenco's superior effluent filters resist clogging better than all other brands. Our stan- dard, full-sized 4-in. (100-mm) Biotube Effluent Filter provides maximum long-term protection in a complete package, with housing. Our 4-in. (100-mm) Biotube Jr, at half the size of our standard model, has more filtering capacity than the full-sized filters sold by other manufacturers. For tanks with existing outlet tees, the Biotube Insert Filter is ideal. And for low profile tanks, there's the Base Inlet Filter. * Covered by patent numbers 5,492,635 and 4,439,323 To Order Call your nearest Orenco Systems®, Inc. distributor. For nearest distribu- tor, call Orenco at 800-348-9843 or go to www.orenco.com and click on "Distributor Locator." APS-FT-1 Rev. 3.4 © 11/10 Orenco Systems®, Inc. Standard Features & Benefits • Has 5-10 times more flow area than other brands, so lasts many times longer between clean- ings, increasing homeowner satisfaction • Installs in min- utes inside new or existing tanks; extendible tee handle for easy removal Optional Features & Benefits • Alarm available, to signal the need for cleaning • Flow modulating discharge orifices available to limit flow rate leaving tank, mitigat- ing surges and increasing retention time • Custom and commercial sizes available • Easy to clean by simply hosing off whenever the tank needs pumping • Removes about two-thirds of sus- pended solids, on average, extending drainfield life • Corrosion -proof construction, to ensure long life • Lifetime warranty Biotube Filtering Process Effluent from the relatively clear zone of the septic tank, between the scum and sludge layers, horizontally enters the Biotube Effluent Filter. Effluent then enters the annular space between the housing and the Biotubes, utilizing the Biotubes' entire surface for filtering. Particles larger than the Biotube's mesh are prevented from leaving the tank. Cal Orenco Systems" I ncorporated Changing the Way the World Does Wastewater° www.orenco.com W= s= Nomenclatures 4-in. Biotube Filter (standard) FT 04 I Options: Blank = no options M = flow modulation plate installed A = float bracket attached Cartridge height: 28" and 36" are standard Housing height: 36" and 44" are standard Filter diameter (inches) W = fits Type 3034 outlet pipe S = fits Schedule 40 outlet pipe Blank = 1/8" filtration P = 1/16" filtration Biotube effluent filter series 8-in. Biotube Filter (base inlet model) FT 08 22 -14 B Options: A = float bracket FS = 2" outlet orifice FSO = 2" outlet orifice and overflow plate* Base inlet model Cartridge height: 14" standard Housing height: 22" standard Filte diameter (inches) 08 = 8" Blank = 1/8" filtration P = 1/16" filtration Biotube effluent filter series * Also available with coupling and sleeve as a "kit": FT-OVERFLOWKIT 4-in. Biotube Jr. (includes cartridge and housing) FT J 04 18 Options: Blank = no options M = flow modulation plate installed A = float bracket attached Cartridge height (inches) Filte diameter (inches) fits Type 3034 outlet tee fits Schedule 40 outlet tee Blank = 1/8" filtration P = 1/16" filtration Junior series Biotube effluent filter series 4-in. Biotube Filter Insert (cartridge only) FTi 0418- For customized options (e.g., NC indicates North Carolina regions) W = fits Type 3034 outlet tee S = fits Schedule 40 outlet tee Cartridge height (inches) Filte diameter (inches) Blank = 1/8" filtration P = 1/16" filtration Insert Biotube effluent filter series 4-in. Biotube Effluent Filter Extendible PVC handle 4-in. Biotube Jr. Stainless steel set screws Top seal plate Air vents Biotubefilter cartridge )000( Solid base — Riser a wall Filter housing Tank wall / Distributed By: Double Walled PVC Riser & Lid Options Poly Lid (Static load tested to 5000 Ibs) • Skid resistance surface • Available in green • Highest level of UV Protection included • Includes a foam gasket for airtight and watertight applications Includes square drive screws to discourage unauthorized entry Insulation panels achieve R-10 insulation rating • • c' C C) 2) C Double Walled PVC Riser 41 I\ / N /I-n /1-wl I\ 4 2" of Insulation Standard Orenco ® DuraFiber'" Access Lids (FLD) Not recommended for vehicular traffic 24" and 30" Diameters • Solid, resin -infused fiberglass construction • 20,000-Ib breaking strength • Standard green or brown colors • Available with or without urethane lid gasket • Available with carbon filtration • 4 stainless steel flathead socket cap screws & hex key wrench • Insulated lids available - 2" or 4" • Available in 24" and 30" Diameter • Cut to length • Sold in +/- 2" increments • Must be cut between ribs V!c!VALLEY � PRECAST, & Wastewater • Systems • Products PRECAST, Inc. • Service (719) 395�764 28005 Co. Rd. 317 P.O. Boc925 Fax: (719) 395-3727 Buena Yam' CO 81211 Webslte: www.valleyprecastcom Email: frontdesk©valleyprecastcom Item # DBox 8C Concrete Distribution Box (1 inlet, 7 outlets) & Riser 1 1 15" Top View - 28" I 4 1 0 15" 12" 4 4 4 4 4 End View 0 r Riser Section nock Down Baffle 28" - 15" II b 4 4 4 4 4 4 4 ° 4 4 4 4 d 4 el Side View 4 II 12" End View Section View 28" 25" -� 14" ° ❑00 5" 1 I 28" 4 \1v' Lid View II • 6000 PSI Concrete • 7 Outlet equal flow • Slide -in Baffle • 4" Pipe penetration ports • Connectors cast into the box • 12" Riser available Weight: D-Box with Baffle - 200 lbs D-Box Lid - 75 lbs D-Box Riser -140 Ibs Water & (719) 395.6764 28005 Rd. 317 Wastewater P.O. Boot 925 NOVALLEY • Pucts Fax: (719) 395-3727 &v'�81211 PRECAST, Inc. • Service Website: www.valleyprecast.00m Email: frontdesk©valleyprecast.00m THIS WEIR SHAPE IS SELF LEVELING THESE RIBS PROVIDE FRICTION FIT FOR ALL 4" PIPE ID 1.73 [4.4 cm .09 -.2cm- i1 1.05 12.7 cm GEAR AND RACK PROVIDES POSITIVE ONE TIME LEVELING POLYLOK EQUALIZER PART NO. - 3049 MATERIAL - FILLED POLYPROPYLENE INFILTRATOR' water technologies Quick4 Plusu Series The Quick4 Plus Standard Chamber offers maximum strength through its two center structural columns. This chamber can be installed in a 36-inch-wide trench. Like the original line of Quick4 chambers, it offers advanced contouring capability with its Contour Swivel Connectiono which permits turns up to 15-degrees, right or left. It is also available in four -foot lengths to provide optimal installation flexibility. The Quick4 Plus All -in -One 12 Endcap, and the Quick4 Periscope are available with this chamber, providing increased flexibility in system configurations. Maximum Strength Quick4 Plus Standard Chamber Specifications Size 340VV x 530L x 120H (864 mm x 1346 mm x 305 mm) Effective Length 480 (1219 mm) Louver Height 80 (203 mm) Storage Capacity 47 gal (178 L) Invert Height 0.60 (15 mm), 5.30 (135 mm), 8.00 (203 mm), 12.70 (323 mm) Quick4PLUS CHAMBER SYSTEMS The Quick4® Plus Standard Chamber Quick4 Plus Standard Chamber Benefits: • Two center structural columns offer increased stability and superior strength • Advanced contouring connections • Latching mechanism allows for quick installation • Four -foot chamber lengths are easy to handle and install • Supports wheel loads of 16,000 Ibs/axle with 120 of cover Quick4 Plus All -in -One 12 Endcap Benefits: • May be used at the end of chamber row for an inlet/outlet or can be installed mid -trench • Mid -trench connection feature allows construction of chamber rows with center feed, as an alternative to inletting at the ends of chamber rows • Center -feed connection allows for easy installation of serial distribution systems • Pipe connection options include sides, ends or top APPROVED in Quick4 Plus All -in -One Periscope Benefits: • Allows for raised invert installations • 180° directional inletting • 120 raised invert is ideal for serial applications Certified by the International Association of Plumbing and Mechanical i R� Officials (IAPM0) (�J uic ' use erles Quick4 Plus Standard Chamber 0111ck47s CHAMBER SYSTEMS Quick4 Plus All -in -One 12 Endcap EFFECTIVE LENGTH 33" PRESSURIZED PIPE DRILL POINTS LOCATIONS (2 PLACES) FRONT VIEW Quick4 Plus All -in -One Periscope 13" QUICK4 PLUS ALL -IN -ONE PERISCOPE /.1/ (360° SWIVEL) INFILTRATOR° water technologies 12.7" INVERT 9" 4 Business Park Road P.O. Box 768 Old Saybrook, CT 06475 860-577-7000 • Fax 860-577-7001 1-800-221-4436 www.infiltratorwater.com SIDE VIEW INFILTRATOR WATER TECHNOLOGIES STANDARD LIMITED WARRANTY (a) The structural integrity of each chamber, endcap and other accessory manufactured by Infiltrator (ClUnits0), when installed and operated in a leachfield of an onsite septic system in accordance with Infiltratorl instructions, is warranted to the original purchaser (I1Holderf) against defective materials and workmanship for one year from the date that the septic permit is issued for the septic system containing the Units; provided, however, that if a septic permit is not required by applicable law, the warranty period will begin upon the date that installation of the septic system commences. To exercise its warranty rights, Holder must notify Infiltrator in writing at its Corporate Headquarters in Old Saybrook, Connecticut within fifteen (15) days of the alleged defect. Infiltrator will supply replacement Units for Units determined by Infiltrator to be covered by this Limited Warranty. Infiltratorl liability specifically excludes the cost of removal and/or installation of the Units. (b) THE LIMITED WARRANTY AND REMEDIES IN SUBPARAGRAPH (a) ARE EXCLUSIVE. THERE ARE NO OTHER WARRANTIES WITH RESPECT TO THE UNITS, INCLUDING NO IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE (c) This Limited Warranty shall be void if any part of the chamber system is manufactured by anyone other than Infiltrator. The Limited Warranty does not extend to incidental, consequential, special or indirect damages. Infiltrator shall not be liable for penalties or liquidated damages, including loss of production and profits, labor and materials, overhead costs, or other losses or expenses incurred by the Holder or any third party. Specifically excluded from Limited Warranty coverage are damage to the Units due to ordinary wear and tear, alteration, accident, misuse, abuse or neglect of the Units; the Units being subjected to vehicle traffic or other conditions which are not permitted by the installation instructions; failure to maintain the minimum ground covers set forth in the installation instructions; the placement of improper materials into the system containing the Units; failure of the Units or the septic system due to improper siting or improper sizing, excessive water usage, improper grease disposal, or improper operation; or any other event not caused by Infiltrator. This Limited Warranty shall be void if the Holder fails to comply with all of the terms set forth in this Limited Warranty. Further, in no event shall Infiltrator be responsible for any loss or damage to the Holder, the Units, or any third party resulting from installation or shipment, or from any product liability claims of Holder or any third party. For this Limited Warranty to apply, the Units must be installed in accordance with all site conditions required by state and local codes; all other applicable laws; and Infiltrator[ installation instructions. (d) No representative of Infiltrator has the authority to change or extend this Limited Warranty. No warranty applies to any party other than the original Holder. The above represents the Standard Limited Warranty offered by Infiltrator. A limited number of states and counties have different warranty requirements. Any purchaser of Units should contact Infiltrator0u Corporate Headquarters in Old Saybrook, Connecticut, prior to such purchase, to obtain a copy of the applicable warranty, and should carefully read that warranty prior to the purchase of Units. U.S. Patents: 4,759,661; 5,017,041; 5,156,488; 5,336,017; 5,401,116; 5,401,459; 5,511,903; 5,716,163; 5,588,778; 5,839,844 Canadian Patents: 1,329,959; 2,004,564 Other patents pending. Infiltrator, Equalizer, Quick4, and SideWinder are registered trademarks of Infiltrator Water Technologies. Infiltrator is a registered trademark in France. Infiltrator Water Technologies is a registered trademark in Mexico. Contour, MicroLeaching, PolyTuff, ChamberSpacer, MultiPort, PosiLock, QuickCut, QuickPlay, SnapLock and StraightLock are trademarks of Infiltrator Water Technologies. PolyLok is a trademark of PolyLok, Inc. TUF-TITE is a registered trademark of TUF-TITE, INC. Ultra -Rib is a trademark of IPEX Inc. © 2013 Infiltrator Water Technologies, LLC. All rights reserved. Printed in U.S.A. PLUS05 0713 Contact Infiltrator Water TechnologiesoTechnical Services Department for assistance at 1-800-221-4436