HomeMy WebLinkAbout1500 W Sheep Creek Rd - 186313300001017935 7/3 /2019 Original check (017919) it was made to building dept - Voided Inspection Result Eagle County, Colorado P.O. Box 179 500 Broadway Eagle, CO Phone: (970) 328-8730 Fax: (970) 328-7185 IVR Phone: 1-866-701-3307 Inspection Number: Dotsero - 1500 SHEEP CREEK - 502438 Permit Number: OWTS-016885-2019 Inspection Date: 09/03/2020 Inspector: Lewandowski, Claire Permit Type: OWTS Permit Inspection Type: OWTS Final Inspection Work Classification: NewOwner:Biscayne Trust Job Address:1500 SHEEP CREEK RD IVR Pin Number:188404 CO Project:<NONE> Parcel Number:186313300001 Contractor:Phone: / Cell: Inspection Status: Approved Inspection Notes The above-referenced permit has been inspected and finalized. The Onsite Wastewater Treatment System (OWTS) was designed and installed to serve the five-bedroom residence on the above property. Additional information about the maintenance of your septic system needs can be accessed through our website links, provided on the Environmental Health Department’s septic system resource page. Be aware that changes in the use of your property or alterations of your building may require commensurate changes to, or relocation of, your septic system. Landscape features, trees with taproots, irrigation systems, and parking areas above the soil treatment area can cause a premature system failure. It is equally important that you notice and immediately repair dripping faucets and hissing toilets as this will certainly cause the system to fail. If you have any questions regarding this information, please contact us at (970) 328-8755 and reference the OWTS septic permit number. Inspector Comments Added Item: Septic Tank The existing tank had not been abandoned at the time of final and must be completed in accordance with Eagle County Public Health Agency OWTS Regulation 43.9.C. Added Item: Record Drawing Added Item: Record Photos Added Item: Site and Soil Added Item: Final Certification Letter Added Item: General Plan Thursday, September 3, 2020 For more information visit: http://www.eaglecounty.us Page 1 of 2 Connection to the two bedroom cabin was not complete at time of inspection as the construction of the cabin is still in progress, the connection must be completed in accordance with the engineers design, and inspected prior to backfill and TCO of the Cabin. Added Item: Soil Treatment Area (STA) Added Item: Identification of Systems Contractor Thursday, September 3, 2020 For more information visit: http://www.eaglecounty.us Page 2 of 2 5020 County Road 154 Glenwood Springs, CO 81601 phone: (970) 945-7988 fax: (970) 945-8454 email: kaglenwood@kumarusa.com www.kumarusa.com Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado August 28, 2020 Biscayne Trust WGS LLP Attn: Brooks Hazel 1101 5th Avenue #325 San Rafael, CA 94901 (bhazel@wgsllp.com) Project No. 19-7-359 Permit No. OWTS-016885-2019 Subject: Partial Certification of Onsite Wastewater Treatment System, Proposed Cabin Addition and Car Barn, Upper Cabin Area, 1500 Sheep Creek Ranch, Eagle County, Colorado Ladies and Gentlemen: A representative of Kumar & Associates observed the partial installation of the Onsite Wastewater Treatment System (OWTS) for the proposed upper cabin addition and new car barn currently under construction, at the subject site as required by the Eagle County Environmental Health Department. Our observations and recommendations are presented in this report. The services are supplemental to Kumar & Associates agreement for professional services to Biscayne Trust WGS LLP dated June 5, 2019. We previously designed the OWTS for the cabin and car barn as submitted in our report dated July 24, 2019, Project No. 19-7-359. The system was designed for two bedrooms for the cabin and one bathroom for the car barn. The OWTS was installed under Eagle County Permit Number OWTS-016885-2019 by Highmark Builders. We performed our evaluation on September 26, 2019. At this time, construction of the car barn was underway however, the proposed addition to the cabin had not begun. The OWTS components observed included: sewer line, cleanout, septic tank, effluent line, distribution box, and soil treatment area (STA) and the locations of these components. At the time of our visit the sewer line had been partially backfilled in the area of the concrete slab in front of the car barn. Pictures were provided by the contractor of the area that had been backfilled. The installation and locations of the system components were verified as shown on Figure 1. Pictures of the OWTS components made during the site visit are included with this report. The distance locations to the septic tank shown on Figure 1 were made by taping. The soils exposed in the trench excavations for the STA were sandy loam to loam and similar to those used for the design. The distribution box was changed from the designed Tuf-Tite 4-hole distribution box to a precast concrete 8-hole distribution box which is acceptable to us. The water service line is well outside of the 25-foot setback to the sewer line as shown on Fig. 1. Kumar & Associates OWTS PHOTOGRAPH LOG PROPOSED CABIN ADDITION AND CAR BARN UPPER CABIN AREA 1500 SHEEP CREEK ROAD EAGLE COUNTY, COLORADO Project No. 19-7-359 Photograph 1: Sewer line from car barn and from cabin. Cleanouts at car barn and connection of sewer lines. (Photograph provided by contractor.) Photograph 2: Valley Precast two-chamber 1,000 gallon septic tank and sewer line. (Photograph provided by contractor.) OWTS PHOTOGRAPH LOG PROPOSED CABIN ADDITION AND CAR BARN UPPER CABIN AREA 1500 SHEEP CREEK ROAD EAGLE COUNTY, COLORADO Project No. 19-7-359 Photograph 3: Septic tank with effluent line exiting. Photograph 4: Concrete 8-hole distribution box. OWTS PHOTOGRAPH LOG PROPOSED CABIN ADDITION AND CAR BARN UPPER CABIN AREA 1500 SHEEP CREEK ROAD EAGLE COUNTY, COLORADO Project No. 19-7-359 Photograph 5: Soil treatment area (STA) with observation ports installed. Photograph 6: Sewer line to cabin at stubbed end. (Photograph provided by contractor.) 5020 County Road 154 Glenwood Springs, CO 81601 phone: (970) 945-7988 fax: (970) 945-8454 email: kaglenwood@kumarusa.com www.kumarusa.com Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado ONSITE WASTEWATER TREATMENT SYSTEM DESIGN PROPOSED CABIN ADDITION AND CAR BARN UPPER CABIN AREA 1500 SHEEP CREEK ROAD EAGLE COUNTY, COLORADO PROJECT NO. 19-7-359 JUNE 27, 2019 PREPARED FOR: BISCAYNE TRUST WGS LLP ATTN: BROOKS HAZEL 1101 5TH AVENUE #325 SAN RAFAEL, CA 94901 (bhazel@wgsllp.com) Kumar & Associates, Inc. ® Project No. 19-7-359 TABLE OF CONTENTS INTRODUCTION ...................................................................................................................... - 1 - PROPOSED CONSTRUCTION ................................................................................................ - 1 - SITE CONDITIONS ................................................................................................................... - 2 - SUBSURFACE CONDITIONS ................................................................................................. - 2 - OWTS ANALYSIS .................................................................................................................... - 3 - DESIGN RECOMMENDATIONS ............................................................................................ - 4 - SOIL TREATMENT AREA................................................................................................... - 4 - OWTS COMPONENTS ......................................................................................................... - 5 - OWTS OPERATION AND MAINTENANCE.......................................................................... - 8 - OWTS HOUSEHOLD OPERATION .................................................................................... - 9 - OWTS MAINTENANCE ....................................................................................................... - 9 - OWTS CONSTRUCTION OBSERVATION .......................................................................... - 10 - LIMITATIONS ......................................................................................................................... - 10 - FIGURES FIGURE 1 – SITE VICINITY MAP FIGURE 2 – OWTS SITE PLAN FIGURE 3 – USDA GRADATION TEST RESULTS FIGURE 4 – SOIL TREATMENT AREA CALCULATIONS FIGURE 5 – SOIL TREATMENT AREA PLAN VIEW FIGURE 6 – SOIL TREATMENT ARE CROSS SECTION ATTACHMENTS VALLEY PRECAST 1,000 GALLON, TWO-CHAMBER SEPTIC TANK DETAIL TUF-TITE 4-HOLE DISTRIBUTION BOX Kumar & Associates, Inc. ® Project No. 19-7-359 INTRODUCTION This report provides the results of an onsite wastewater treatment system (OWTS) design for a proposed addition and renovation to the cabin and a new car barn located at the upper cabin area, 1500 Sheep Creek Road, near Sweetwater, Eagle County, Colorado. The purpose of the report was to provide design details for the OWTS in accordance with the 2018 Eagle County Environmental Health Department Onsite Wastewater Treatment System Regulations and the Colorado Department of Public Health and Environmental Regulation #43. The design was conducted in accordance to our agreement for professional services to Biscayne Trust WGS LLP dated June 5, 2019. PROPOSED CONSTRUCTION The existing cabin is a single-story two-bedroom structure located in the NWSE of Section 13, Range 87W, Township 3S, see Figure 1. The proposed addition will be on the east side of the cabin with no additional bedrooms. The proposed car barn will be a two-story slab on grade structure. The main level will be garage with a shop in the loft. There will be one bathroom and no bedrooms in the car barn. The locations of the proposed addition and proposed car barn are shown on Figure 2. It is planned to construct a new OWTS at the site for the cabin and car barn. The soil treatment area (STA) will be sized for 2 bedrooms and bathroom facility for the car barn. The proposed soil treatment area (STA) for the OWTS will be located to the southeast and downslope of the cabin as shown on Figure 2. Water service will be provided by an existing onsite well located to the north of the cabin. The route of the water line to the car barn has not yet been determined but the required setbacks from the OWTS should be considered for its location. If proposed construction is different than that described, we should be contacted to re-evaluate our design recommendations. - 2 - Kumar & Associates, Inc. ® Project No. 19-7-359 SITE CONDITIONS The cabin access is a gravel road parallel and to the southwest of West Fork Sheep Creek and by a ford across the creek and is to the northwest of the creek, see Figure 2. There are various sheds and fences on the site. The site is creek valley bottom which is moderately sloping down generally to the southeast. Elevation difference from the cabin to the planned STA is estimated at about 15 feet and elevation across the planned STA is estimated at about 3 or 4 feet. The cabin has lower floor elevation slightly above adjacent ground surface. Vegetation consists of grass, weeds and brush. The cabin is currently served by an OWTS. A plastic septic tank is to the east of the cabin in the area of the proposed addition and is estimated to be about 500 gallons volume. The existing STA is assumed to be in the fenced area of the driveway loop. SUBSURFACE CONDITIONS The field exploration for the OWTS was conducted on June 12, 2019. Four profile pits (Profile Pits 1-4) were excavated with a backhoe at the approximate locations shown on Figure 2 to evaluate the subsurface conditions at proposed STA for the OWTS. The pits were logged by a representative of Kumar & Associates. Logs of the profile pits are provided below. Log of Profile Pit 1 Depth USDA Classification 0’-1’ TOPSOIL; organic loam, firm, moist, dark brown. 1’-8’ SANDY LOAM to LOAM; gravelly, moderate blocky structure, stiff, slightly moist, brown. • Disturbed bulk sample obtained from 3 to 4 feet. • Bottom of pit @ 8 feet. • No free water or redoximorphic features observed at time of pit excavation. Log of Profile Pit 2 Depth USDA Classification 0’-1’ TOPSOIL; organic loam, firm, slightly moist, brown. 1’-8’ SANDY LOAM to LOAM; moderate blocky structure, stiff, slightly moist to moist - 3 - Kumar & Associates, Inc. ® Project No. 19-7-359 with depth, brown. • Disturbed bulk sample obtained from 3 to 4 feet. • Bottom of pit @ 8 feet. • No free water or redoximorphic features observed at time of pit excavation. Log of Profile Pit 3 Depth USDA Classification 0’-2’ MAN-PLACED FILL; loam, organics, massive structure, stiff, slightly moist, brown. 2’-4½’ DEBRIS; wood, metal, various other trash. • Bottom of pit @ 4½ feet. • No free water or redoximorphic features observed at time of pit excavation. Log of Profile Pit 4 Depth USDA Classification 0’-8’ SANDY LOAM to LOAM; gravelly, moderate blocky structure, stiff, slightly moist, brown. • Bottom of pit @ 8 feet. • No free water or redoximorphic features observed at time of pit excavation. The soils encountered in profile pits below about nil to 1 foot of topsoil consisted of Sandy Loam to Loam to the pit depths of 8 feet. Profile Pit 3 encountered man-place fill and buried debris. Hydrometer and gradation analyses were performed on a disturbed bulk sample of the natural soils from Profile Pit 2 from 3 to 4 feet depth with the results provided on Figure 3. The tested sample (minus No. 10 size sieve fraction) classifies as Sandy Loam per the USDA system. No free water was encountered in the pits nor indications of seasonal high groundwater observed in the pits at the time of excavation. Based on the tactile profile pit evaluations and laboratory testing, the soils at the STA have been classified as Type 2 per State regulations, which equates to a long-term acceptance rate (LTAR) of 0.60 gallons per square foot per day. OWTS ANALYSIS Based on the site conditions and profile pit evaluations, the evaluated area should be suitable for a conventional infiltration soil treatment system consisting of chambers in a trench configuration. - 4 - Kumar & Associates, Inc. ® Project No. 19-7-359 The base of the soil treatment trenches will be in Sandy Loam to Loam soils (Soil Type 2) for which we will use an LTAR of 0.60 gallons per square foot per day to size the STA. The system will be designed for two bedrooms and an average daily flow of 75 gallons per person with double occupancy. The selected STA location is away from the fill and debris area. We believe the design flow for the cabin and LTAR are somewhat conservative for the soils and the designed system is adequate to accommodate the bathroom facility from the car barn. The effluent will gravity flow from the cabin and from the car barn to the septic tank for primary treatment and then gravity flow to the STA for dispersal and final treatment. The STA will consist of two trenches with Infiltrator Quick 4 Plus Standard chambers. Equal distribution will be provided to the chambers and trenches by a distribution box. A 50 feet setback is required to the creek from the proposed STA. As designed, the distance of the STA from the creek is about 75 feet. A 25 feet setback is required from the proposed STA to any potable water supply lines. The location of the water supply line to the car barn is currently not designed. If the water supply line is within 25 feet of the proposed STA, we should be notified for additional recommendations. The existing septic tank and piping should be abandoned per Eagle County regulations. We believe removal of the tank and piping is the more desirable approach. DESIGN RECOMMENDATIONS The design recommendations presented below are based on the proposed construction, the site and subsurface conditions encountered and our experience in the area. A layout of the proposed OWTS components is provided on Figure 2. If conditions encountered during construction are different than those that are described in this report, please contact us to re-evaluate our design recommendations. SOIL TREATMENT AREA • The STA will consist of two trenches with 15 Infiltrator Quick 4 Plus Standard chambers placed in the native Sandy Loam to Loam soils (60 chambers total). Equal distribution will be provided to the trenches by a distribution box. - 5 - Kumar & Associates, Inc. ® Project No. 19-7-359 • The STA was sized based on an LTAR of 0.60 gallons per square feet per day. • Each chamber was allowed 12 square feet of area. A 30% reduction of the STA size was applied for use of Infiltrator chambers in a trench configuration. The total STA is 360 square feet. Soil treatment area calculations are shown on Figure 4. • A minimum of four feet of undisturbed soil between the trenches is required. • A minimum of 12 inches and a maximum of 24 inches of cover soil should be placed over the top of the chambers. • The trenches should be oriented along ground contours to minimize soil cut and cover. • The base and sidewalls of the trench excavations should be scarified prior to the chamber placement. • Backfill should be graded to deflect surface water away from the STA and should be sloped at 3 horizontal to 1 vertical or flatter. A swale to divert surface water run-off may be needed along the up-slope side of the STA. • Disturbed soil should be re-vegetated as soon as possible with a native grass mix. No trees, shrubs or other plants with deep roots should be planted on or near the STA as this may damage the system piping. • Four-inch diameter inspection ports should be installed vertically into the knockouts provided in the Infiltrator end caps. Install ports at each end of each trench. The inspection port piping should be screwed into the top to the chambers and should not extend down to the ground surface inside the chambers. The inspection ports should extend at least 8 inches above the finished ground surface or be protected in a valve box at finished grade. • A plan view of the STA is presented on Figure 5 and a cross section of the STA is presented on Figure 6. • The STA must maintain a minimum 50 feet setback to West Sheep Fork Creek. • The STA must maintain a minimum 25 feet setback to the on-site water supply line. OWTS COMPONENTS Recommended OWTS components provided below are based on our design details and our experience with the specific component manufacturers. Equivalent components may be feasible but need to be approved by us prior to construction. - 6 - Kumar & Associates, Inc. ® Project No. 19-7-359 Septic Tank • A 1,000 gallon, two-chamber septic tank will be used for primary treatment. A detail of the tank is provided as an attachment to the report. • An effluent filter should be installed in the tank outlet tee. • The tank must be a minimum of five feet from any structure and from the STA. The tank must be a minimum of 10 feet from any potable water supply lines. • The tank must be set level. The excavation bottom must be free of large rocks or other objects that could damage the tank during placement. A road base or gravel bedding material may be needed to prevent tank damage during placement and act as a leveling course. • The tank lids must extend to final surface grade and made to be easily located. • Install the tank with 2 feet minimum cover soil for frost protection. Maximum tank soil cover is 4 feet. Sewer Pipe • The sewer lines to the septic tank should not be less than the diameter of the building drains and not less than 4 inches in diameter. • The sewer pipes should have a rating of SDR35 or stronger. Schedule 40 PVC pipe is required beneath all driveway surfaces. • The sewer pipes should be sloped between 2% to 4% to help limit disturbance of solids in the tank and potential sewage bypass of the first chamber of the tank. If a steeper slope is needed, this can be accomplished with vertical step-downs in the sewer line. • A minimum 36 inches of cover soil should be provided over the sewer pipes. Paved areas, patios or other areas without vegetative cover may be more susceptible to frost and we recommend 48 inches of soil cover over the sewer pipes in these areas, and the pipe be insulated on top and sides with 2-inch-thick blue foam insulation board. If adequate soil cover is not possible, we should be contacted for re-evaluation prior to installation. • The sewer pipes should be bedded in compacted ¾ inch road base or native soils provided that the native soils contain no angular rocks or rocks larger than 2½ inches in - 7 - Kumar & Associates, Inc. ® Project No. 19-7-359 diameter to help prevent settlement of the pipe. Sags in the pipe could cause standing effluent to freeze and damage the piping. • Install cleanout pipes within 5 feet of the building foundations, where the sewer pipes bend 90 degrees or more and every 100 feet of sewer pipe. • All 90-degree bends should be installed using a 90-degree long-sweep or by using two 45-degree elbows. • The sewer line locations shown on Figure 2 are considered conceptual. We assume that there will be only one sewer line exiting the cabin and one sewer line exiting the car barn. It is the responsibility of the owner/contractors to locate all sewer line exit locations and connections to the septic tank. We should be notified if there are more than one sewer line exiting the cabin or car barn. Effluent Transport Piping • The effluent transport pipe should be 4-inch diameter SDR35 piping sloped at a 2% minimum to flow from the septic tank to the distribution box and from the distribution box to each trench. Piping should extend at least 6 inches into the top knockout provided in the Infiltrator end caps and be screwed in place. Splash plates should be installed beneath the inlet piping to help limit scouring of the infiltrative soil surface in the chambers. • The effluent transport pipe should be bedded in compacted ¾ inch road base or native soils provided that the native soils contain no angular rocks or rocks larger than 2½ inches in diameter to help prevent settlement of the pipe. Sags could cause standing effluent to freeze and damage to the piping. • A minimum 18 inches of cover soil should be provided over the effluent transport pipe. Paved areas, patios or other areas without vegetative cover may be more susceptible to frost. We recommend 48 inches of soil cover over the effluent pipe and insulation with at least 2 inches of rigid foam insulation in these areas. If adequate cover soil is not possible, we should re-evaluate the condition prior to installation. • The effluent pipe should be double encased with larger diameter Schedule 40 PVC pipe underneath driveway surfaces and be provided with at least 48 inches of soil cover and be insulated on top and sides with 2-inch-thick foam insulation board. - 8 - Kumar & Associates, Inc. ® Project No. 19-7-359 • All 90-degree bends should be installed using a 90 degree long-sweep or by using two 45-degree elbows. Distribution Box • The distribution box will be used to equally divide effluent flow between the trenches. We recommend the Tuf-Tite 4-Hole Distribution Box since it is easily accessible from ground surface for maintenance. A copy of the distribution box detail is provided as an attachment to this report. • The distribution box outlet pipes should be equipped with Tuf-Tite speed levelers for ease of initial setup and adjustment over time. • The distribution box should be a minimum of 18 inches below grade with risers and an access lid at or above grade. • The distribution box must be accessible from ground surface for inspection and maintenance per State guidelines. • The effluent line from the septic tank should be directed downward into the distribution box with a 90-degree elbow inside the box. • The distribution box must be installed level on a compacted road base subgrade to ensure equal effluent distribution. If settlement of the distribution box occurs, unequal effluent distribution may take place which could cause hydraulic overload of one of the trenches and potential failure. The distribution box should be monitored periodically, and the speed levelers should be adjusted as necessary for levelling. The ground surface above and around the distribution box should be graded to drain away surface water to prevent standing water near the distribution box. OWTS OPERATION AND MAINTENANCE The OWTS will require periodic inspection and maintenance to function properly. A properly designed, installed and maintained system can greatly increase its lifespan. The level of maintenance will vary depending on the complexity of the system and water use habits of the residents. We recommend that an OWTS Operation and Maintenance (O&M) Manual be developed. Depending on the complexity of the system, a contract with an OWTS maintenance provider may be prudent. Below are some basic recommendations for the OWTS O&M. - 9 - Kumar & Associates, Inc. ® Project No. 19-7-359 OWTS HOUSEHOLD OPERATION • Use of high efficiency water fixtures is recommended to decrease the hydraulic load on the OWTS system. • Fix plumbing leaks immediately as this may cause a hydraulic overload of the soil absorption system. • Do not irrigate the area on top of or directly upgradient of the soil absorption field as this may cause a hydraulic overload. • Do not dispose of household waste down drains as this may clog or damage OWTS components. Examples of household waste includes: dental floss, cotton swabs, coffee grounds, paper towels, feminine products and many other kitchen and bath items. • Use of kitchen garbage disposals is not recommended. If a garbage disposal is utilized, kitchen wastewater should be screened thoroughly. Many kitchen solids are not decomposed in the septic tank and may cause increased tank pumping frequency. • Do not dispose of household chemicals, greases, oils, paints, hot tub water or water softener backwash in household drains. A separate drywell, if feasible, may be necessary for hot tub water or water softener backwash disposal. • Limit the use of bleach as this may harm useful bacteria in the septic tank and soil absorption system. • Liquid dishwasher and clothes washer detergent is recommended for households served by an OWTS. Clay substances used as fillers in powder detergents may result in clogging of the soils absorption system. • The effluent in septic tanks can freeze during extended periods of non-use in cold weather. We recommend that a tank heater be installed in this system to help prevent freezing. OWTS MAINTENANCE • Inspect the septic tank, pump vault filter and STA at least annually for problems or signs of failure. • The filter should be cleaned annually by spray washing solids into the first chamber of - 10 - Kumar & Associates, Inc. ® Project No. 19-7-359 the septic tank. • The septic tank should be pumped and cleaned every 3 to 5 years depending on use. Longer pumping intervals may increase the amount of solids that reach the STA, which may shorten its life span. • Pumping of the septic tank should take place when the level of the sludge and scum layers combined take up about 25 to 33% of the capacity of the first chamber of the tank. OWTS CONSTRUCTION OBSERVATION The Eagle County Environmental Health Department requires that the designer of the system provide a record drawing and certification of the OWTS construction (As-Built inspection). We should be provided with at least 48-hour notice prior to the installer needing the inspections. Prior to issuance of our certification letter, we require observation of all system components prior to backfill. The number of site visits required for the inspection will depend on the installer’s construction schedule. LIMITATIONS We have conducted this design in accordance with generally accepted engineering principles and practices in this area at this time. We make no warranty either expressed or implied. The recommendations provided in this report are based on the site conditions, profile pit evaluations and soil texture analysis, the proposed construction and our experience in the area. Variations in the subsurface conditions may not become evident until excavation is performed. If conditions encountered during construction appear different from those described in this report, we should be notified so that re-evaluation of the recommendations may be made. This report has been prepared for the exclusive use by our client for design purposes. We are not responsible for technical interpretations by others of our information. As the project evolves, we should provide continued consultation and field services during construction to review and monitor the implementation of our recommendations, and to verify that the recommendations have been appropriately interpreted. Significant design changes may require additional analysis or modifications to our design. Kumar & Associates Kumar & Associates SILT COBBLES COARSE GRAVEL MEDIUMMEDIUMV. FINE SAND CLAY FINE CO.FINEV. CO.CO.FINE Kumar & Associates Kumar & Associates Kumar & Associates Notes: &KDPEeUssKoXOGEeLQstDOOeGOeYeOoQDsFDULILeGJUoXQGsXUIDFe&oQFUetesDQGPD\EeXseGDsDOeYeOLQJFoXUseLI QeFessDU\ &DUesKoXOGEetDNeQE\tKeFoQtUDFtoUtoDYoLGFoPSDFtLoQoItKeQDtLYesoLOsLQtKetUeQFKDUeDs7KeEDseDQGsLGeZDOOsoI tUeQFKe[FDYDtLoQssKoXOGEesFDULILeGSULoUtoFKDPEeULQstDOODtLoQ $OOSLSLQJsKoXOGKDYeDUDtLQJoI6'5oUstUoQJeU &KDQJestotKLsGesLJQsKoXOGQotEePDGeZLtKoXtFoQsXOtDtLoQDQGDSSUoYDOE\.XPDU $ssoFLDtes 5eIeUtotKe(DJOe&oXQt\2QsLte:DsteZDteU6\steP5eJXODtLoQsIoUotKeUDSSOLFDEOesSeFLILFDtLoQs Infiltrator Quick 4 Plus Standard Chamber Installed Level Scarify ground surface prior to chamber placement. Excavate 36" Wide Trench Approx. Exi s t i n g G r o u n d S u r f a c e 12" min. 24" max. Cover Soil Graded to Deflect Surface Water Native Soil Kumar & Associates Notes 1.Chambers should be installed level on a scarified ground surface. Concrete sand may be used as a leveling course if necessary. 2.Care should be taken by the contractor to avoid compaction of the native soils in the trench areas. The base and side walls of trench excavations should be scarified prior to chamber installation. 3.Changes to this design should not be made without consultation and approval by Kumar & Associates. Tough Problem Providing a simple, reliable, and permanent means for dividing septic tank effluent flow. TUF-TITE Solution A strong, stable, permanent, non-corrosive Tuf-Tite Distribution Box, with a Tuf-Tite Speed Leveler in each outlet. Snap-in pipe seals They’re patented. Simply insert your PVC pipe and push it through the flexible, polyethylene Tuf-Tite seal. Pipes fit watertight. Installation couldn’t be easier. Tuf-Tite® Distribution Box. THE TOUGH ONE! n Injection molded HDPE n Non-corrosive n Simple to install n Easy to level In a septic environment, no other material can match High Density Polyethylene in delivering a lifetime of trouble-free service. Tuf-Tite Distribution Boxes are injection molded, using only premium HDPE which contains no fillers or foam. They’re permanent Unlike cement-based pipe grout, Tuf-Tite seals will not crack or corrode in septic conditions. They stay pliable and watertight permanently. 4-Hole Distribution Box4-Hole Dist Cat Sheet 11/8/01 8:09 AM Page 1 nInjection molded.Exceptionallystrong.nHDPE is non-corrosive in a septic environment. nPatented snap-in pipe seals simplify installation. Interlocking Lid. Heavy-dutyHDPE Lid is ribbed for addedstrength and rigidity. Slottedsides interlock on theDistribution Box to assure atight fit.The 4HD2 Distribution Box comes complete with a Regular Lid or an Inspection Port Lid, and 5 snap-in fittings of your choice. Model B1 Riser. For series B1 Box. Stackable HDPE Risers extend to grade in 6” increments. Accept 11” x 11” lids and grates. 11” S-35 S-40 P-10 11” 11” 11” 11” 151/2” 2” Drop INSTALLATION IS JUST THIS SIMPLE 1.Position the Distribution Box on level virgin soil. Do not place box on a concrete slab. 2.Install the inlet pipe and outlet pipes. Be sure the bottoms of all pipes rest on virgin soil. 3.Level the Distribution Box and all pipes as needed. 4.Backfill the pipes to within two feet of the Distribution Box. Recheck the level of the box, then backfill up to the top lid ridge. 5.Install and adjust Tuf-Tite Speed Levelers. 6.Place lid on the Distribution Box and finish backfilling. Choice of Fittings S-35 Pipe Seal, for: n Sewer and Drain n SDR 35 n ASTM 3034 n Thin Wall n 1500 Lb. Crush S-40 Pipe Seal, for: n Schedule 40 n 4” Corrugated P-10 Plug, for unused holes Choice of Lids Regular Lid. Molded of rugged HDPE. Inspection Port Lid. For easy access and inspection. Models available to accept either 4” or 6” extension pipes. Tuf-Tite Speed Levelers™ Control the flow of effluent from the Distribution Box. Simply insert a Speed Leveler into each outlet pipe. Rotate each Speed Leveler so the flow is distributed as desired. Available for 3” or 4” PVC pipe. ©1999 Tuf-Tite® Corporation Form 4HD2-3. Printed in USA A full line of innovations for better septic systems 11” 6” 7” 14” Drainage and Septic Products Tuf-Tite®Corporation 1200 Flex Court Lake Zurich, Illinois 60047 4-Hole Distribution Box 4HD24-Hole Dist Cat Sheet 11/8/01 8:09 AM Page 2 5020 County Road 154 Glenwood Springs, CO 81601 phone: (970) 945-7988 fax: (970) 945-8454 email: kaglenwood@kumarusa.com www.kumarusa.com Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado ONSITE WASTEWATER TREATMENT SYSTEM DESIGN PROPOSED CABIN ADDITION AND CAR BARN UPPER CABIN AREA 1500 SHEEP CREEK ROAD EAGLE COUNTY, COLORADO PROJECT NO. 19-7-359 JUNE 27, 2019 REVISED JULY 24, 2019 PREPARED FOR: BISCAYNE TRUST WGS LLP ATTN: BROOKS HAZEL 1101 5TH AVENUE #325 SAN RAFAEL, CA 94901 (bhazel@wgsllp.com) Kumar & Associates, Inc. ® Project No. 19-7-359 TABLE OF CONTENTS INTRODUCTION ...................................................................................................................... - 1 - PROPOSED CONSTRUCTION ................................................................................................ - 1 - SITE CONDITIONS ................................................................................................................... - 2 - SUBSURFACE CONDITIONS ................................................................................................. - 2 - OWTS ANALYSIS .................................................................................................................... - 3 - DESIGN RECOMMENDATIONS ............................................................................................ - 4 - SOIL TREATMENT AREA................................................................................................... - 4 - OWTS COMPONENTS ......................................................................................................... - 5 - OWTS OPERATION AND MAINTENANCE.......................................................................... - 8 - OWTS HOUSEHOLD OPERATION .................................................................................... - 9 - OWTS MAINTENANCE ....................................................................................................... - 9 - OWTS CONSTRUCTION OBSERVATION .......................................................................... - 10 - LIMITATIONS ......................................................................................................................... - 10 - FIGURES FIGURE 1 – SITE VICINITY MAP FIGURE 2 – OWTS SITE PLAN FIGURE 3 – USDA GRADATION TEST RESULTS FIGURE 4 – SOIL TREATMENT AREA CALCULATIONS FIGURE 5 – SOIL TREATMENT AREA PLAN VIEW FIGURE 6 – SOIL TREATMENT ARE CROSS SECTION ATTACHMENTS VALLEY PRECAST 1,000 GALLON, TWO-CHAMBER SEPTIC TANK DETAIL TUF-TITE 4-HOLE DISTRIBUTION BOX Kumar & Associates, Inc. ® Project No. 19-7-359 INTRODUCTION This report provides the results of an onsite wastewater treatment system (OWTS) design for a proposed addition and renovation to the cabin and a new car barn located at the upper cabin area, 1500 Sheep Creek Road, near Sweetwater, Eagle County, Colorado. The purpose of the report was to provide design details for the OWTS in accordance with the 2018 Eagle County Environmental Health Department Onsite Wastewater Treatment System Regulations and the Colorado Department of Public Health and Environmental Regulation #43. The design was conducted in accordance to our agreement for professional services to Biscayne Trust WGS LLP dated June 5, 2019. PROPOSED CONSTRUCTION The existing cabin is a single-story two-bedroom structure located in the NWSE of Section 13, Range 87W, Township 3S, see Figure 1. The proposed addition will be on the east side of the cabin with no additional bedrooms. The proposed car barn will be a two-story slab on grade structure. The main level will be garage with a shop in the loft. There will be one bathroom and no bedrooms in the car barn. The locations of the proposed addition and proposed car barn are shown on Figure 2. It is planned to construct a new OWTS at the site for the cabin and car barn. The soil treatment area (STA) will be sized for 2 bedrooms and bathroom facility for the car barn. The proposed soil treatment area (STA) for the OWTS will be located to the southeast and downslope of the cabin as shown on Figure 2. Water service will be provided by an existing onsite well located to the north of the cabin. The route of the water line to the car barn has not yet been determined but the required setbacks from the OWTS should be considered for its location. If proposed construction is different than that described, we should be contacted to re-evaluate our design recommendations. - 2 - Kumar & Associates, Inc. ® Project No. 19-7-359 SITE CONDITIONS The cabin access is a gravel road parallel and to the southwest of West Fork Sheep Creek and by a ford across the creek and is to the northwest of the creek, see Figure 2. There are various sheds and fences on the site. The site is creek valley bottom which is moderately sloping down generally to the southeast. Elevation difference from the cabin to the planned STA is estimated at about 15 feet and elevation across the planned STA is estimated at about 3 or 4 feet. The cabin has lower floor elevation slightly above adjacent ground surface. Vegetation consists of grass, weeds and brush. The cabin is currently served by an OWTS. A plastic septic tank is to the east of the cabin in the area of the proposed addition and is estimated to be about 500 gallons volume. The existing STA is assumed to be in the fenced area of the driveway loop. SUBSURFACE CONDITIONS The field exploration for the OWTS was conducted on June 12, 2019. Four profile pits (Profile Pits 1-4) were excavated with a backhoe at the approximate locations shown on Figure 2 to evaluate the subsurface conditions at proposed STA for the OWTS. The pits were logged by a representative of Kumar & Associates. Logs of the profile pits are provided below. Log of Profile Pit 1 Depth USDA Classification 0’-1’ TOPSOIL; organic loam, firm, moist, dark brown. 1’-8’ SANDY LOAM to LOAM; gravelly, moderate blocky structure, stiff, slightly moist, brown. • Disturbed bulk sample obtained from 3 to 4 feet. • Bottom of pit @ 8 feet. • No free water or redoximorphic features observed at time of pit excavation. Log of Profile Pit 2 Depth USDA Classification 0’-1’ TOPSOIL; organic loam, firm, slightly moist, brown. 1’-8’ SANDY LOAM to LOAM; moderate blocky structure, stiff, slightly moist to moist - 3 - Kumar & Associates, Inc. ® Project No. 19-7-359 with depth, brown. • Disturbed bulk sample obtained from 3 to 4 feet. • Bottom of pit @ 8 feet. • No free water or redoximorphic features observed at time of pit excavation. Log of Profile Pit 3 Depth USDA Classification 0’-2’ MAN-PLACED FILL; loam, organics, massive structure, stiff, slightly moist, brown. 2’-4½’ DEBRIS; wood, metal, various other trash. • Bottom of pit @ 4½ feet. • No free water or redoximorphic features observed at time of pit excavation. Log of Profile Pit 4 Depth USDA Classification 0’-8’ SANDY LOAM to LOAM; gravelly, moderate blocky structure, stiff, slightly moist, brown. • Bottom of pit @ 8 feet. • No free water or redoximorphic features observed at time of pit excavation. The soils encountered in profile pits below about nil to 1 foot of topsoil consisted of Sandy Loam to Loam to the pit depths of 8 feet. Profile Pit 3 encountered man-place fill and buried debris. Hydrometer and gradation analyses were performed on a disturbed bulk sample of the natural soils from Profile Pit 2 from 3 to 4 feet depth with the results provided on Figure 3. The tested sample (minus No. 10 size sieve fraction) classifies as Sandy Loam per the USDA system. No free water was encountered in the pits nor indications of seasonal high groundwater observed in the pits at the time of excavation. Based on the tactile profile pit evaluations and laboratory testing, the soils at the STA have been classified as Type 2 per State regulations, which equates to a long-term acceptance rate (LTAR) of 0.60 gallons per square foot per day. OWTS ANALYSIS Based on the site conditions and profile pit evaluations, the evaluated area should be suitable for a conventional infiltration soil treatment system consisting of chambers in a trench configuration. - 4 - Kumar & Associates, Inc. ® Project No. 19-7-359 The base of the soil treatment trenches will be in Sandy Loam to Loam soils (Soil Type 2) for which we will use an LTAR of 0.60 gallons per square foot per day to size the STA. The system will be designed for two bedrooms and an average daily flow of 75 gallons per person with double occupancy. The selected STA location is away from the fill and debris area. We believe the design flow for the cabin and LTAR are somewhat conservative for the soils and the designed system is adequate to accommodate the bathroom facility from the car barn. The effluent will gravity flow from the cabin and from the car barn to the septic tank for primary treatment and then gravity flow to the STA for dispersal and final treatment. The STA will consist of two trenches with Infiltrator Quick 4 Plus Standard chambers. Equal distribution will be provided to the chambers and trenches by a distribution box. A 50 feet setback is required to the creek from the proposed STA. As designed, the distance of the STA from the creek is about 75 feet. A 25 feet setback is required from the proposed STA to any potable water supply lines. The location of the water supply line to the car barn is currently not designed. If the water supply line is within 25 feet of the proposed STA, we should be notified for additional recommendations. The existing septic tank and piping should be abandoned per Eagle County regulations. We believe removal of the tank and piping is the more desirable approach. DESIGN RECOMMENDATIONS The design recommendations presented below are based on the proposed construction, the site and subsurface conditions encountered and our experience in the area. A layout of the proposed OWTS components is provided on Figure 2. If conditions encountered during construction are different than those that are described in this report, please contact us to re-evaluate our design recommendations. SOIL TREATMENT AREA • The STA will consist of two trenches with 15 Infiltrator Quick 4 Plus Standard chambers placed in the native Sandy Loam to Loam soils (30 chambers total). Equal distribution will be provided to the trenches by a distribution box. - 5 - Kumar & Associates, Inc. ® Project No. 19-7-359 • The STA was sized based on an LTAR of 0.60 gallons per square feet per day. • Each chamber was allowed 12 square feet of area. A 30% reduction of the STA size was applied for use of Infiltrator chambers in a trench configuration. The total STA is 360 square feet. Soil treatment area calculations are shown on Figure 4. • A minimum of four feet of undisturbed soil between the trenches is required. • A minimum of 12 inches and a maximum of 24 inches of cover soil should be placed over the top of the chambers. • The trenches should be oriented along ground contours to minimize soil cut and cover. • The base and sidewalls of the trench excavations should be scarified prior to the chamber placement. • Backfill should be graded to deflect surface water away from the STA and should be sloped at 3 horizontal to 1 vertical or flatter. A swale to divert surface water run-off may be needed along the up-slope side of the STA. • Disturbed soil should be re-vegetated as soon as possible with a native grass mix. No trees, shrubs or other plants with deep roots should be planted on or near the STA as this may damage the system piping. • Four-inch diameter inspection ports should be installed vertically into the knockouts provided in the Infiltrator end caps. Install ports at each end of each trench. The inspection port piping should be screwed into the top to the chambers and should not extend down to the ground surface inside the chambers. The inspection ports should extend at least 8 inches above the finished ground surface or be protected in a valve box at finished grade. • A plan view of the STA is presented on Figure 5 and a cross section of the STA is presented on Figure 6. • The STA must maintain a minimum 50 feet setback to West Sheep Fork Creek. • The STA must maintain a minimum 25 feet setback to the on-site water supply line. OWTS COMPONENTS Recommended OWTS components provided below are based on our design details and our experience with the specific component manufacturers. Equivalent components may be feasible but need to be approved by us prior to construction. - 6 - Kumar & Associates, Inc. ® Project No. 19-7-359 Septic Tank • A 1,000 gallon, two-chamber septic tank will be used for primary treatment. A detail of the tank is provided as an attachment to the report. • An effluent filter should be installed in the tank outlet tee. • The tank must be a minimum of five feet from any structure and from the STA. The tank must be a minimum of 10 feet from any potable water supply lines. • The tank must be set level. The excavation bottom must be free of large rocks or other objects that could damage the tank during placement. A road base or gravel bedding material may be needed to prevent tank damage during placement and act as a leveling course. • The tank lids must extend to final surface grade and made to be easily located. • Install the tank with 2 feet minimum cover soil for frost protection. Maximum tank soil cover is 4 feet. Sewer Pipe • The sewer lines to the septic tank should not be less than the diameter of the building drains and not less than 4 inches in diameter. • The sewer pipes should have a rating of SDR35 or stronger. Schedule 40 PVC pipe is required beneath all driveway surfaces. • The sewer pipes should be sloped between 2% to 4% to help limit disturbance of solids in the tank and potential sewage bypass of the first chamber of the tank. If a steeper slope is needed, this can be accomplished with vertical step-downs in the sewer line. • A minimum 36 inches of cover soil should be provided over the sewer pipes. Paved areas, patios or other areas without vegetative cover may be more susceptible to frost and we recommend 48 inches of soil cover over the sewer pipes in these areas, and the pipe be insulated on top and sides with 2-inch-thick blue foam insulation board. If adequate soil cover is not possible, we should be contacted for re-evaluation prior to installation. • The sewer pipes should be bedded in compacted ¾ inch road base or native soils provided that the native soils contain no angular rocks or rocks larger than 2½ inches in - 7 - Kumar & Associates, Inc. ® Project No. 19-7-359 diameter to help prevent settlement of the pipe. Sags in the pipe could cause standing effluent to freeze and damage the piping. • Install cleanout pipes within 5 feet of the building foundations, where the sewer pipes bend 90 degrees or more and every 100 feet of sewer pipe. • All 90-degree bends should be installed using a 90-degree long-sweep or by using two 45-degree elbows. • The sewer line locations shown on Figure 2 are considered conceptual. We assume that there will be only one sewer line exiting the cabin and one sewer line exiting the car barn. It is the responsibility of the owner/contractors to locate all sewer line exit locations and connections to the septic tank. We should be notified if there are more than one sewer line exiting the cabin or car barn. Effluent Transport Piping • The effluent transport pipe should be 4-inch diameter SDR35 piping sloped at a 2% minimum to flow from the septic tank to the distribution box and from the distribution box to each trench. Piping should extend at least 6 inches into the top knockout provided in the Infiltrator end caps and be screwed in place. Splash plates should be installed beneath the inlet piping to help limit scouring of the infiltrative soil surface in the chambers. • The effluent transport pipe should be bedded in compacted ¾ inch road base or native soils provided that the native soils contain no angular rocks or rocks larger than 2½ inches in diameter to help prevent settlement of the pipe. Sags could cause standing effluent to freeze and damage to the piping. • A minimum 18 inches of cover soil should be provided over the effluent transport pipe. Paved areas, patios or other areas without vegetative cover may be more susceptible to frost. We recommend 48 inches of soil cover over the effluent pipe and insulation with at least 2 inches of rigid foam insulation in these areas. If adequate cover soil is not possible, we should re-evaluate the condition prior to installation. • The effluent pipe should be double encased with larger diameter Schedule 40 PVC pipe underneath driveway surfaces and be provided with at least 48 inches of soil cover and be insulated on top and sides with 2-inch-thick foam insulation board. - 8 - Kumar & Associates, Inc. ® Project No. 19-7-359 • All 90-degree bends should be installed using a 90 degree long-sweep or by using two 45-degree elbows. Distribution Box • The distribution box will be used to equally divide effluent flow between the trenches. We recommend the Tuf-Tite 4-Hole Distribution Box since it is easily accessible from ground surface for maintenance. A copy of the distribution box detail is provided as an attachment to this report. • The distribution box outlet pipes should be equipped with Tuf-Tite speed levelers for ease of initial setup and adjustment over time. • The distribution box should be a minimum of 18 inches below grade with risers and an access lid at or above grade. • The distribution box must be accessible from ground surface for inspection and maintenance per State guidelines. • The effluent line from the septic tank should be directed downward into the distribution box with a 90-degree elbow inside the box. • The distribution box must be installed level on a compacted road base subgrade to ensure equal effluent distribution. If settlement of the distribution box occurs, unequal effluent distribution may take place which could cause hydraulic overload of one of the trenches and potential failure. The distribution box should be monitored periodically, and the speed levelers should be adjusted as necessary for levelling. The ground surface above and around the distribution box should be graded to drain away surface water to prevent standing water near the distribution box. OWTS OPERATION AND MAINTENANCE The OWTS will require periodic inspection and maintenance to function properly. A properly designed, installed and maintained system can greatly increase its lifespan. The level of maintenance will vary depending on the complexity of the system and water use habits of the residents. We recommend that an OWTS Operation and Maintenance (O&M) Manual be developed. Depending on the complexity of the system, a contract with an OWTS maintenance provider may be prudent. Below are some basic recommendations for the OWTS O&M. - 9 - Kumar & Associates, Inc. ® Project No. 19-7-359 OWTS HOUSEHOLD OPERATION • Use of high efficiency water fixtures is recommended to decrease the hydraulic load on the OWTS system. • Fix plumbing leaks immediately as this may cause a hydraulic overload of the soil absorption system. • Do not irrigate the area on top of or directly upgradient of the soil absorption field as this may cause a hydraulic overload. • Do not dispose of household waste down drains as this may clog or damage OWTS components. Examples of household waste includes: dental floss, cotton swabs, coffee grounds, paper towels, feminine products and many other kitchen and bath items. • Use of kitchen garbage disposals is not recommended. If a garbage disposal is utilized, kitchen wastewater should be screened thoroughly. Many kitchen solids are not decomposed in the septic tank and may cause increased tank pumping frequency. • Do not dispose of household chemicals, greases, oils, paints, hot tub water or water softener backwash in household drains. A separate drywell, if feasible, may be necessary for hot tub water or water softener backwash disposal. • Limit the use of bleach as this may harm useful bacteria in the septic tank and soil absorption system. • Liquid dishwasher and clothes washer detergent is recommended for households served by an OWTS. Clay substances used as fillers in powder detergents may result in clogging of the soils absorption system. • The effluent in septic tanks can freeze during extended periods of non-use in cold weather. We recommend that a tank heater be installed in this system to help prevent freezing. OWTS MAINTENANCE • Inspect the septic tank, pump vault filter and STA at least annually for problems or signs of failure. • The filter should be cleaned annually by spray washing solids into the first chamber of - 10 - Kumar & Associates, Inc. ® Project No. 19-7-359 the septic tank. • The septic tank should be pumped and cleaned every 3 to 5 years depending on use. Longer pumping intervals may increase the amount of solids that reach the STA, which may shorten its life span. • Pumping of the septic tank should take place when the level of the sludge and scum layers combined take up about 25 to 33% of the capacity of the first chamber of the tank. OWTS CONSTRUCTION OBSERVATION The Eagle County Environmental Health Department requires that the designer of the system provide a record drawing and certification of the OWTS construction (As-Built inspection). We should be provided with at least 48-hour notice prior to the installer needing the inspections. Prior to issuance of our certification letter, we require observation of all system components prior to backfill. The number of site visits required for the inspection will depend on the installer’s construction schedule. LIMITATIONS We have conducted this design in accordance with generally accepted engineering principles and practices in this area at this time. We make no warranty either expressed or implied. The recommendations provided in this report are based on the site conditions, profile pit evaluations and soil texture analysis, the proposed construction and our experience in the area. Variations in the subsurface conditions may not become evident until excavation is performed. If conditions encountered during construction appear different from those described in this report, we should be notified so that re-evaluation of the recommendations may be made. This report has been prepared for the exclusive use by our client for design purposes. We are not responsible for technical interpretations by others of our information. As the project evolves, we should provide continued consultation and field services during construction to review and monitor the implementation of our recommendations, and to verify that the recommendations have been appropriately interpreted. Significant design changes may require additional analysis or modifications to our design. Kumar & Associates Kumar & Associates SILT COBBLES COARSE GRAVEL MEDIUMMEDIUMV. FINE SAND CLAY FINE CO.FINEV. CO.CO.FINE Kumar & Associates Kumar & Associates Kumar & Associates Notes: &KDPEeUssKoXOGEeLQstDOOeGOeYeOoQDsFDULILeGJUoXQGsXUIDFe&oQFUetesDQGPD\EeXseGDsDOeYeOLQJFoXUseLI QeFessDU\ &DUesKoXOGEetDNeQE\tKeFoQtUDFtoUtoDYoLGFoPSDFtLoQoItKeQDtLYesoLOsLQtKetUeQFKDUeDs7KeEDseDQGsLGeZDOOsoI tUeQFKe[FDYDtLoQssKoXOGEesFDULILeGSULoUtoFKDPEeULQstDOODtLoQ $OOSLSLQJsKoXOGKDYeDUDtLQJoI6'5oUstUoQJeU &KDQJestotKLsGesLJQsKoXOGQotEePDGeZLtKoXtFoQsXOtDtLoQDQGDSSUoYDOE\.XPDU $ssoFLDtes 5eIeUtotKe(DJOe&oXQt\2QsLte:DsteZDteU6\steP5eJXODtLoQsIoUotKeUDSSOLFDEOesSeFLILFDtLoQs Infiltrator Quick 4 Plus Standard Chamber Installed Level Scarify ground surface prior to chamber placement. Excavate 36" Wide Trench Approx. Exi s t i n g G r o u n d S u r f a c e 12" min. 24" max. Cover Soil Graded to Deflect Surface Water Native Soil Kumar & Associates Notes 1.Chambers should be installed level on a scarified ground surface. Concrete sand may be used as a leveling course if necessary. 2.Care should be taken by the contractor to avoid compaction of the native soils in the trench areas. The base and side walls of trench excavations should be scarified prior to chamber installation. 3.Changes to this design should not be made without consultation and approval by Kumar & Associates. Tough Problem Providing a simple, reliable, and permanent means for dividing septic tank effluent flow. TUF-TITE Solution A strong, stable, permanent, non-corrosive Tuf-Tite Distribution Box, with a Tuf-Tite Speed Leveler in each outlet. Snap-in pipe seals They’re patented. Simply insert your PVC pipe and push it through the flexible, polyethylene Tuf-Tite seal. Pipes fit watertight. Installation couldn’t be easier. Tuf-Tite® Distribution Box. THE TOUGH ONE! n Injection molded HDPE n Non-corrosive n Simple to install n Easy to level In a septic environment, no other material can match High Density Polyethylene in delivering a lifetime of trouble-free service. Tuf-Tite Distribution Boxes are injection molded, using only premium HDPE which contains no fillers or foam. They’re permanent Unlike cement-based pipe grout, Tuf-Tite seals will not crack or corrode in septic conditions. They stay pliable and watertight permanently. 4-Hole Distribution Box4-Hole Dist Cat Sheet 11/8/01 8:09 AM Page 1 nInjection molded.Exceptionallystrong.nHDPE is non-corrosive in a septic environment. nPatented snap-in pipe seals simplify installation. Interlocking Lid. Heavy-dutyHDPE Lid is ribbed for addedstrength and rigidity. Slottedsides interlock on theDistribution Box to assure atight fit.The 4HD2 Distribution Box comes complete with a Regular Lid or an Inspection Port Lid, and 5 snap-in fittings of your choice. Model B1 Riser. For series B1 Box. Stackable HDPE Risers extend to grade in 6” increments. Accept 11” x 11” lids and grates. 11” S-35 S-40 P-10 11” 11” 11” 11” 151/2” 2” Drop INSTALLATION IS JUST THIS SIMPLE 1.Position the Distribution Box on level virgin soil. Do not place box on a concrete slab. 2.Install the inlet pipe and outlet pipes. Be sure the bottoms of all pipes rest on virgin soil. 3.Level the Distribution Box and all pipes as needed. 4.Backfill the pipes to within two feet of the Distribution Box. Recheck the level of the box, then backfill up to the top lid ridge. 5.Install and adjust Tuf-Tite Speed Levelers. 6.Place lid on the Distribution Box and finish backfilling. Choice of Fittings S-35 Pipe Seal, for: n Sewer and Drain n SDR 35 n ASTM 3034 n Thin Wall n 1500 Lb. Crush S-40 Pipe Seal, for: n Schedule 40 n 4” Corrugated P-10 Plug, for unused holes Choice of Lids Regular Lid. Molded of rugged HDPE. Inspection Port Lid. For easy access and inspection. Models available to accept either 4” or 6” extension pipes. Tuf-Tite Speed Levelers™ Control the flow of effluent from the Distribution Box. Simply insert a Speed Leveler into each outlet pipe. Rotate each Speed Leveler so the flow is distributed as desired. Available for 3” or 4” PVC pipe. ©1999 Tuf-Tite® Corporation Form 4HD2-3. Printed in USA A full line of innovations for better septic systems 11” 6” 7” 14” Drainage and Septic Products Tuf-Tite®Corporation 1200 Flex Court Lake Zurich, Illinois 60047 4-Hole Distribution Box 4HD24-Hole Dist Cat Sheet 11/8/01 8:09 AM Page 2