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HomeMy WebLinkAbout1511 Polar Star Dr - 210904104009Environmental Health Department P.O. Box 179 500 Broadway Eagle, CO 81631-0179 Phone: (970) 328-8730 Fax: (970) 328-7185 Permit Permit No. OWTS-023606-2022 Permit Type: OWTS Permit Work Classification: Major Repair Permit Status: Active Issue Date: 6/30/2022 Expires: 10/28/2022 On-Site Wastewater Treatement System Project Address Parcel Number 1511 POLAR STAR DR, EAGLE AREA,210904104009 Owner Information Address Rick Beveridge PO Box 1406 Eagle, CO 81631 Phone: (970) 390-7594 Cell: Email: rick@bevrealestate.com Inspections: For Inspections Call: (970) 328-8755 Engineer Phone Email Kumar & Associates, Shane Mellow (970) 945-7988 smello@kumarusa.com Contractor License Number Phone Email Spiegel Construction dirthog3@gmail.com(970) 904-0694 Permitted Construction / Details: Install the new system exactly as depicted in the Kumar & Associates design dated June 16th, 2022, stamped and signed on June 22nd, 2022 by David A Young. This system is designed to accomodate the maximum daily flows for a 5 bedroom residence with a 1 bedroom ADU and replace the existing system permitted in the 1970s. The OWTS consists of one sewer line from the residence. Two Forterra 1,000 gallon, two-chamber septic tanks will be used in series with effluent filters in the outlet tees. A Tuf-Tite 6-Hole Distribution Box equipped with speed levelers will be accessible at grade. The STA consists of 4 shallow trenches of 19 Infiltrator Quick 4 Plus Standard chambers for a total of 76. Contact Eagle County Environmental Health and the design engineer well in advance of requesting inspections prior to backfilling any component of the OWTS. The design engineer is responsible for conducting all inspections necessary to certify the installation and assure the functionality of the system. System certification, along with photos and a record drawing is required to be submitted to and approved by Eagle County Environmental Health prior to the use of the system. THIS PERIMT EXPIRES BY TIME LIMITATION AND BECOMES NULL AND VOID IF THE WORK AUTHORIZED BY THE PERMIT IS NOT COMMENCED WITHIN 120 DAYS OF ISSUANCE, OR BEFORE THE EXPIRATION OF AN ASSOCIATED BUILDING PERMIT Issued by: Environmental Health Department, Eagle County, CO Danielle Salinsky Date June 30, 2022 CONDITIONS 1. 2.ALL INSTALLATIONS MUST COMPLY WITH ALL REQUIREMENTS OF THE EAGLE COUNTY PUBLIC HEALTH AGENCY ON-SITE WASTEWATER TREATMENT SYSTEM REGULATIONS ADOPTED PURSUANT TO AUTHORITY GRANTED IN CR.S. 25-10-101, et seq., AS AMENDED 3.THIS PERMIT IS VALID ONLY FOR PERFORMING WORK ON OWTS ASSOCIATED WITH STRUCTURES WHICH HAVE FULLY COMPLIED WITH COUNTY ZONING AND BUILDING REQUIREMENTS CONNECTION TO, OR USE WITH, ANY DWELLING OR STRUCTURE NOT APPROVED BY THE ZONING AND BUILDING DEPARTMENTS SHALL AUTOMATICALLY BE A VIOLATION OF A REQUIREMENT OF THE PERMIT AND WILL RESULT IN BOTH LEGAL ACTION AND REVOCATION OF THE PERMIT 4.1.6(A)(1) EAGLE COUNTY PUBLIC HEALTH AGENCY ON-SITE WASTEWATER TREATMENT SYSTEM REGULATIONS REQUIRES ANY PERSON WHO CONSTRUCTS, ALTERS OR INSTALLS AN ON-SITE WASTEWATER TREATMENT SYSTEM TO BE LICENSED Thursday, June 30, 2022 1 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: INSP-517644-2022 Permit Number: OWTS-023606-2022 Inspection Date: 08/30/2022 Inspector: Lewandowski, Claire Permit Type: OWTS Permit Inspection Type: OWTS Final Inspection Work Classification: Major RepairOwner:Rick Beveridge Job Address:1511 POLAR STAR DR IVR Pin Number:195460 EAGLE AREA, CO Project:<NONE> Parcel Number:210904104009 Contractor:Phone: (970) 904-0694 / Cell: Spiegel Construction Inspection Status: Approved Inspection Notes The above-referenced permit has been inspected and finalized. 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 Observed in overall compliance with OWTS Regulations and approved PE design. At request of EC EHS, an effluent filter handle was extended for ease of access and cleaning. An outlet was added to the outlet pipe in the first tank at the request of EC EHS. Added Item: Record Drawing Received. Provided from K&A, design PE. Added Item: Record Photos Received. Provided in compliance from K&A, design PE. Added Item: Final Certification Letter Received. Provided in compliance from K&A, stamped, signed, and dated September 20, 2022 by David A. Young, PE. Added Item: General Plan Observed distribution box installed level and in compliance with OWTS Regulations. Wednesday, September 21, 2022 For more information visit: http://www.eaglecounty.us Page 1 of 2 Added Item: Soil Treatment Area (STA) Observed in compliance with OWTS Regulations and permitted design. Added Item: Identification of Systems Contractor Licensed Eagle County OWTS Installer, Spiegel Construction, completed the installation. Wednesday, September 21, 2022 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 September 14, 2022 Rick Beveridge P. O. Drawer 1406 Eagle, Colorado 81631 (rick@berrealestate.com) Project No. 22-7-229.02 Permit No. OWTS-023606-2022 Subject: Certification of Onsite Wastewater Treatment System, Remodeled Residence, Lot 16, Filing 1, Kaibab Subdivision, 1511 Polar Star Drive, Eagle County, Colorado Dear Rick: A representative of Kumar & Associates observed the installation of the Onsite Wastewater Treatment System (OWTS) for the residence 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 you dated March 14, 2022. We previously designed the OWTS for the residence as submitted in our report dated June 16, 2022, Project No. 22-7-229.02. The system was designed for five bedrooms in the residence and one bedroom in a future ADU. The system was installed by Speigel Construction under Permit No. OWTS-023606-2022. We performed our as-built evaluation on August 25 and 29, 2022. The OWTS components observed included: cleanout, septic tank, effluent line, distribution box and soil treatment area (STA) and the locations of these components. 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 from the residence. We understand from Chris Spiegel the existing sewerline, which was left in-place, is in good condition and has adequate slope. The cleanout was installed at the end of the existing sewer line and is outside of the recommended 5 feet from the foundation. The soil treatment area has a minimum 25 feet setback from the crest of the dry gulch near the south property line. We suggest a cleanout be provided near the residence as per our design. It is our opinion that the OWTS was installed in general conformance with the above referenced design. 38'20' Kumar & Associates OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE LOT 6, FILING 1, KAIBAB SUBDIVISION 1511 POLAR STAR DRIVE EAGLE COUNTY, COLORADO Project No. 22-7-229.02 Photograph 1: Cleanout at sewer line exiting residence and cleanout at inlet to septic tank. Photograph 2: Two Forterra 1,000-gallon, two-chamber septic tanks in series. OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE LOT 6, FILING 1, KAIBAB SUBDIVISION 1511 POLAR STAR DRIVE EAGLE COUNTY, COLORADO Project No. 22-7-229.02 Photograph 3: Effluent filter at outlet of second septic tank. Photograph 4: Effluent line to distribution box and to trenches. OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE LOT 6, FILING 1, KAIBAB SUBDIVISION 1511 POLAR STAR DRIVE EAGLE COUNTY, COLORADO Project No. 22-7-229.02 Photograph 5: TufTite 7-hole distribution box with speed levelers. Photograph 6: Soil treatment area (STA) with observation ports installed at ends of trenches. 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 EXISTING RESIDENCE LOT 16, FILING 1, KAIBAB SUBDIVISION 1511 POLAR STAR DRIVE EAGLE COUNTY, COLORADO PROJECT NO. 22-7-229.02 JUNE 16, 2022 PREPARED FOR: RICK BEVERIDGE P. O. DRAWER 1406 EAGLE, COLORADO 81631 rick@bevrealestate.com Kumar & Associates, Inc. Project No. 22-7-229.02 TABLE OF CONTENTS INTRODUCTION ...................................................................................................................... - 1 - PROPOSED CONSTRUCTION ................................................................................................ - 1 - SITE CONDITIONS ................................................................................................................... - 1 - SUBSURFACE CONDITIONS ................................................................................................. - 1 - DISCUSSION ............................................................................................................................. - 2 - OWTS ANALYSIS .................................................................................................................... - 2 - DESIGN RECOMMENDATIONS ............................................................................................ - 3 - SOIL TREATMENT AREA................................................................................................... - 3 - OWTS COMPONENTS ......................................................................................................... - 4 - OWTS OPERATION AND MAINTENANCE.......................................................................... - 7 - OWTS HOUSEHOLD OPERATION .................................................................................... - 7 - OWTS MAINTENANCE ....................................................................................................... - 8 - OWTS CONSTRUCTION OBSERVATION ............................................................................ - 8 - LIMITATIONS ........................................................................................................................... - 8 - FIGURES FIGURE 1 – OWTS SITE PLAN FIGURE 2 – USDA GRADATION TEST RESULTS FIGURE 3 – SOIL TREATMENT AREA CALCULATIONS FIGURE 4 – SOIL TREATMENT AREA PLAN VIEW FIGURE 5 – SOIL TREATMENT AREA CROSS SECTION ATTACHMENTS FORTERRA 1,000 GALLON, TWO-CHAMBER SEPTIC TANK DETAIL TUF-TITE 6-HOLE DISTRIBUTION BOX Kumar & Associates, Inc. Project No. 22-7-229.02 INTRODUCTION This report provides the results of an onsite wastewater treatment system (OWTS) design for the existing residence located on Lot 5, Filing 1, Kaibab Subdivision, 1094 Polar Star Drive, Eagle County, Colorado. The subject site is shown on Figure 1. The purpose of the report is 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 services were performed in accordance with our agreement for professional services to Rick Beveridge dated March 14, 2022. PROPOSED CONSTRUCTION The existing residence is being added onto and remodeled. The existing residence has an OWTS that needs to be replaced due to its age. The existing residence is a five-bedroom, one-story structure with a one-bedroom ADU located on the lot as shown on Figure 1. The OWTS will be designed for six bedrooms total. The proposed soil treatment area (STA) for the OWTS will be located to the southwest of the residence as shown on Figure 1. Water service is provided by a public source from Polar Star Drive to the north of the residence. If existing conditions or proposed construction is different than that described, we should be contacted to re-evaluate our design recommendations. SITE CONDITIONS The site is occupied by a residence and detached garage located on the lot as shown on Figure 1. The terrain is somewhat variable with dry gulches to the west and south of the residence. The slope in the area of the residence and proposed STA is moderately sloping down to the southwest. The STA is located between the gullies, approximately 50 feet horizontally from both. The existing STA was not able to be located. Vegetation consists of junipers, sagebrush, grass and weeds. SUBSURFACE CONDITIONS The field exploration for the OWTS was conducted on April 13, 2022. Two profile pits (Profile Pits 1 and 2) were excavated with a backhoe at the approximate locations shown on Figure 1 to evaluate the subsurface conditions at the planned soil treatment area for the OWTS. The pits were logged by a representative of Kumar & Associates. Logs of the profile pits are provided below. - 2 - Kumar & Associates, Inc. Project No. 22-7-229.02 Log of Profile Pit 1 Depth USDA Classification 0-1½’ TOPSOIL; organic Loam, firm, slightly moist, dark brown. 1½’-3’ LOAM; moderate blocky structure, stiff, slightly moist, brown. 3’-4’ LOAMY SAND; granular structure, loose, slightly moist, grayish brown, Volcanic Ash. 4’-8’ LOAM; moderate blocky structure, stiff, slightly moist, brown. • Disturbed bulk sample obtained from 4 to 5 feet. • Bottom of pit @ 8 feet. • No groundwater 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, dark brown. 1-8’ LOAM; moderate blocky structure, stiff, slightly moist, brown • Bottom of pit @ 8 feet. • No groundwater or redoximorphic features observed at time of pit excavation. The soils encountered in the Profile Pits, below about ½ foot of organic topsoil, consisted primarily of Loam down to the pit depths of 8 feet. At Profile Pit 1, a 1 foot layer of Loamy Sand (volcanic ash) was encountered from 3 to 4 feet depth. Hydrometer and gradation analyses were performed on a disturbed bulk sample of the soils from Profile Pit 1 from 4 to 5 feet depth with the results provided on Figure 2. The tested sample (minus No.10 size sieve fraction) classifies as Loam per the USDA system. No free water was encountered in the pits nor indications of seasonal high groundwater were observed at the time of the pit excavations. Based on the subsurface conditions 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. DISCUSSION The existing OWTS for the residence appears to be dated to the construction of the residence in the 1970’s and is undersized based on current regulations. Due to the age of the system, all components (sewer line, septic tank and STA) should be replaced. The existing septic tank should be removed or abandoned per County regulations, and all existing sewer and effluent lines should also be abandoned with the lines removed or capped at each end. OWTS ANALYSIS Based on the site conditions and profile pit evaluations, the evaluated area should be suitable for a conventional infiltration disposal system. There is adequate elevation difference from the - 3 - Kumar & Associates, Inc. Project No. 22-7-229.02 lower floor level of the residence down to the STA for gravity flow of the sewer effluent. The STA will consist of chambers in a trench configuration based in the Loam soils. The STA will be sized for six bedrooms (ten persons) and an average daily flow of 75 gallons per person, and an LTAR of 0.60 gallons per square foot per day for the Loam and Loamy Sand soils. Two septic tanks are planned due to the time needed to order one tank of the correct size, which is acceptable to us. The effluent will gravity flow from the residence to the septic tanks for primary treatment and then gravity flow to the STA for dispersal and final treatment. The STA will consist of four trenches with Infiltrator Quick 4 Plus Standard chambers. Equal distribution will be provided to the chambers and trenches by a distribution box. Based on our site observations, the proposed OWTS appears to be outside of any required setbacks. The setback for the STA from the dry gulches to the west and south is 25 feet and the design distances are about 50 feet. The setback for the septic tanks to the house is 5 feet. We should be notified for additional recommendations if any part of the OWTS is within these minimum setbacks. 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 1. If conditions encountered during construction are different than those that are described in this report, we should be contacted to re-evaluate our design recommendations. SOIL TREATMENT AREA • The STA will consist of four trenches with 19 Infiltrator Quick 4 Plus Standard chambers placed in each trench (76 chambers total) in the native soils. Equal distribution will be provided to the trenches by a distribution box. • 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 design size is 912 square feet. Soil treatment area calculations are shown on Figure 3. • A minimum of four feet of undisturbed soil between the trenches is required. • The trench cut depths should be a maximum of 3 feet. • 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. - 4 - Kumar & Associates, Inc. Project No. 22-7-229.02 • A minimum of 12 inches and a maximum of 24 inches of cover soil should be placed over the chambers. • 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 flow away from the STA may be needed upslope 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 chamber end caps. Install ports at each end of the 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. • The STA must be a minimum of 5 feet from the septic tanks. • The STA must be a minimum of 25 feet from any potable water supply lines. • The STA must be a minimum of 20 feet from the residence. • The STA must be a minimum of 25 feet from the dry gulches. • The STA must be a minimum of 100 feet from any well or cistern. • A plan view of the STA is presented on Figure 4 and a cross section of the STA is presented on Figure 5. 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. Septic Tank • Two 1,000-gallon, two-chamber, Forterra septic tanks should be used for primary treatment. The tanks should be connected in series as shown on Figure 1. A detail of the tanks is provided as an attachment. • The existing septic tank should be abandoned or removed per Eagle County regulations. • An effluent filter should be installed in the tank outlet tee of the second septic tank. • The tanks must be a minimum of 5 feet from the residence and STA. • The tanks must be a minimum of 10 feet from any potable water supply lines. • The tanks must be a minimum of 50 feet from any well or cistern. - 5 - Kumar & Associates, Inc. Project No. 22-7-229.02 • The tanks 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 pea 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 3 feet. Sewer Pipe • The existing sewer line should be abandoned by capping the ends or by being removed. • The new sewer line to the septic tanks should not be less than the diameter of the building drains and not less than 4 inches in diameter. • The sewer pipe should have a rating of SDR35 or stronger. Schedule 40 PVC pipe is required beneath any driveway surfaces. • The sewer pipe should be sloped between 2% to 4% to help limit disturbance of solids in the tanks and potential sewage bypass of the first chamber of the first tank. If a steeper slope is needed, this can be accomplished with vertical step-downs in the sewer line. • A minimum 24 inches of cover soil should be provided over the sewer pipe. 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 pipe 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 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 in the pipe could cause standing effluent to freeze and damage the piping. • Install cleanout pipes within 5 feet of the building foundation, where the sewer pipe bends 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 location shown on Figure 1 is considered conceptual. We assume that there will be only one sewer line exiting the residence. 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 other sewer lines exiting the building. • - 6 - Kumar & Associates, Inc. Project No. 22-7-229.02 Effluent Transport Piping • The existing effluent line should be abandoned by capping the ends or the line removed. • The new 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. • Schedule 40 PVC pipe is required underneath driveway surfaces and should be provided with at least 48 inches of soil cover, and be insulated on top and sides with 2-inch-thick rigid foam insulation board. • 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 6-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 must be accessible from ground surface for inspection and maintenance per the State guidelines. • The effluent line from the septic tanks 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 - 7 - Kumar & Associates, Inc. Project No. 22-7-229.02 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 which could freeze or cause settlement. 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. 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 treatment area. • 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. - 8 - Kumar & Associates, Inc. Project No. 22-7-229.02 • The effluent in septic tanks can freeze during extended periods of non-use in cold weather. We recommend that tank heaters be installed in this system to help prevent freezing. OWTS MAINTENANCE • Inspect the septic tanks, distribution box and STA at least annually for problems or signs of failure. • The effluent filter for the tank should be cleaned at least annually by spray washing solids into the first chamber of the septic tank. • The septic tanks 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 tanks should take place when the level of the sludge and scum layers combined take up 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 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. Existing Ground Surf a c e 12" min. 24" max. Cover Soil Graded to Deflect Surface Water Native Soil 4' Min. Undisturbed Soil Between Trenches 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. TTuuff--TT iittee®® DDiissttrriibbuuttiioonn BBooxx.. TTHHEE TTOOUUGGHH OONN EE!! ■Injection molded HDPE ■Non-corrosive ■Simple to install ■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. 6-Hole Distribution Box ■Injection molded. Exceptionally strong. ■HDPE is non- corrosive in a septic environment. ■Patented snap- in pipe seals simplify installation. ■All Tuf-Tite products are U.V. stabilized. Interlocking Lid. Heavy-duty HDPE Lid is ribbed for added strength and rigidity. Slotted sides interlock on the Distribution Box to assure a tight fit. The 6HD2 Distribution Box comes complete with a Regular Lid or an Inspection Port Lid, and 8 snap-in fittings of your choice. 9” S-35 S-40 P-10 14” 14” 9” 9” 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: ■ Sewer and Drain ■ SDR 35 ■ ASTM 3034 ■ Thin Wall ■ 1500 Lb. Crush S-40 Pipe Seal, for: ■ Schedule 40 ■ 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. Accepts 4” riser 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. ©2005 Tuf-Tite® Corporation Form 6HD2-4. Printed in USA Water-tight Lids and Risers by Tuf-Tite®Drainage and Septic Products Tuf-Tite®Corporation 1200 Flex Court Lake Zurich, Illinois 60047 6-Hole Distribution Box 6HD2