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HomeMy WebLinkAbout30 Alkali Creek Rd - 185521400081Environmental Health Department P.O. Box 179 500 Broadway Eagle, CO 81631-0179 Phone: (970) 328-8730 Fax: (970) 328-7185 Permit Permit No. OWTS-018860-2020 Permit Type: OWTS Permit Work Classification: New Permit Status: Active Issue Date: 8/29/2020 Expires: 12/28/2020 On-Site Wastewater Treatement System Project Address Parcel Number 30 ALKALI CREEK RD, WOLCOTT AREA,185521400081 Owner Information Address Andrew Isaacson PO Box1803 Gypsum, CO 81637 Phone: (970) 471-1740 Cell: (970) 471-1740 Email: aisaacson1@gmail.com Inspections: For Inspections Call: (970) 328-8755 and call the Design Engineer Engineer Phone Email KUMAR & ASSOCIATES, Dave Young (970) 945-7988 dyoung@kumarusa.com Contractor License Number Phone Email Andrew Isaacson aisaacson1@gmail.com(970) 471-1740OWTSPL-000060-20 20 Permitted Construction / Details: Instal the OWTS exactly as depicted in the Kumar & Associates, Inc design dated August 5, 2020, stamped, signed, and dated August 6, 2020 by David A. Young. The OWTS is designed to serve a three-bedroom single family residence. The OWTS will consist of a 1,000 gallon two-compartment Valley Precast Septic tank with an effluent filter in the outlet tee, followed by a distribution box, set level on compacted screened gravel and made accessible at grade, with speed levelers set to equally distribute effluent to 900 square feet of soil treatment area via three shallow trenches not more than one foot deep to allow for four feet of separation distance from the infiltrative surface to bedrock. Install 25 Infiltrator Quick4 Plus Standard chambers in each trench for a total of 75 chambers. Scarify the trench sidewalls and bottoms prior to placement of chambers. 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 or occupancy of the dwelling. 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 Claire Lewandowski Date August 29, 2020 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 Saturday, August 29, 2020 1 INSPECTION WORKSHEET (WOLCOTT AREA - 30 ALKALI CREEK - 508172) FOR EAGLE COUNTY GOVERNMENT OWTS-018860-2020Case Number:Case Module:Permit Management 06/25/2021 ApprovedInspection Status:Inspection Date: OWTS Final InspectionInspection Type:Inspector: Job Address:Parcel Number:30 Alkali Creek Rd Wolcott Area, CO 185521400081 Company Name NameContact Type Contractor Andrew Isaacson Andrew Isaacson Engineer KUMAR & ASSOCIATES Dave Young Owner Andrew Isaacson Andrew Isaacson CommentsPassedChecklist Item True A Valley Precast 1,000 gallon two chamber septic tank was used.Septic Tank - Septic Tank True Received 3/29/2022 from K&A.Record Drawing - Record Drawing True Received 3/29/2022 from K&A.Record Photos - Record Photos True Received 8/29/2020 from K&A.Site and Soil - Site & Soil True Received 3/29/2022 from K&A.Final Certification Letter - Final Certification Letter True Received 8/29/2020 from K&A.General Plan - General Plan True 3 rows of 25 Infiltrator Quick4 Plus Standard chambers for a total of 75. Soil Treatment Area (STA) - Soil Treatment Area (STA) True Drew Issacson is the licensed installer.Identification of Systems Contractor - Identification of Systems Contractor March 31, 2022 Page 1 of 1P.O. Box 179, 500 Broadway, Eagle, CO 81631-0179 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 March 25, 2022 Drew and Kate Isaacson P. O. Box 1803 Gypsum, Colorado 81637 (aisaacson1@gmail.com) Project No. 19-7-719.02 Permit No. OWTS-018860-2020 Subject: Certification of Onsite Wastewater Treatment System, Proposed Residence, Parcel HM33, Horse Mountain Ranch, 30 Alkali Creek Road, Eagle County, Colorado Dear Drew and Kate: 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 December 6, 2019. We previously designed the OWTS for the residence as submitted in our report dated August 5, 2020, Project No. 19-7-719.02. The system was designed for a total of three bedrooms and six persons. The system was installed by Drew Isaacson. We performed our evaluation on June 29 and September 30, 2021. 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. Trench cuts for the STA were a maximum of foot deep. The distance locations to the septic tank shown on Figure 1 were made by taping. The installation of the water line crossing the sewer line and the installation of the septic tank was not observed. No photographs of the water line crossing were able to be obtained from the installer. Per the installer, the water line was encased for five feet on both sides of the sewer line crossing. It is our opinion that the OWTS was installed in general conformance with the above referenced design. The observations and recommendations presented above are based on our site observations and our experience in the area. We make no warranty either express or implied. Alterations to the Kumar & Associates OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE PARCEL HM33, HORSE MOUNTAIN RANCH 30 ALKALI CREEK ROAD EAGLE COUNTY, COLORADO Project No. 19-7-719.02 Photograph 1: Cleanout and sewer line exiting residence. Photograph 2: Sewer line and water line crossing. Water line not yet encased. OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE PARCEL HM33, HORSE MOUNTAIN RANCH 30 ALKALI CREEK ROAD EAGLE COUNTY, COLORADO Project No. 19-7-719.02 Photograph 3: Valley Precast 1,000 gallom, two-compartment septic tank with effluent filter on outlet. Photograph 4: Effluent and sewer lines. Septic tank yet to be set near middle of picture. OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE PARCEL HM33, HORSE MOUNTAIN RANCH 30 ALKALI CREEK ROAD EAGLE COUNTY, COLORADO Project No. 19-7-719.02 Photograph 5: Effluent line to distribution box and to trenches. Photograph 6: Tuf-Tite 4-Hole Distibrution Box with Speed Levels installed. OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE PARCEL HM33, HORSE MOUNTAIN RANCH 30 ALKALI CREEK ROAD EAGLE COUNTY, COLORADO Project No. 19-7-719.02 Photograph 7: Chambers installed in STA trenches with observation ports. Note cuts less than 1 foot. Photograph 8: Graded STA. 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 RESIDENCE PARCEL HM33, HORSE MOUNTAIN RANCH 30 ALKALI CREEK ROAD EAGLE COUNTY, COLORADO PROJECT NO. 19-7-719.02 AUGUST 05, 2020 PREPARED FOR: DREW AND KATE ISAACSON P. O. BOX 1803 GYPSUM, COLORADO 81637 (aisaacson1@gmail.com) Kumar & Associates, Inc. Project No. 19-7-719.02 TABLE OF CONTENTS INTRODUCTION ...................................................................................................................... - 1 - PROPOSED CONSTRUCTION ................................................................................................ - 1 - SITE CONDITIONS ................................................................................................................... - 1 - SUBSURFACE CONDITIONS ................................................................................................. - 1 - OWTS ANALYSIS .................................................................................................................... - 3 - 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 VALLEY PRECAST 1,000 GALLON, TWO-CHAMBER SEPTIC TANK DETAIL TUF-TITE 4-HOLE DISTRIBUTION BOX Kumar & Associates, Inc. Project No. 19-7-719.02 INTRODUCTION This report provides the results of an onsite wastewater treatment system (OWTS) design for the proposed residence to be located on Parcel HM33, Horse Mountain Ranch, 30 Alkali Creek Road, near Wolcott, Eagle County, Colorado. 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 as part of our agreement for professional services to Drew and Kate Isaacson dated December 6, 2019. We previously conducted a subsoil study for foundation design of the proposed residence at the site and presented our findings in a report dated January 6, 2020, Project No. 19-7-719. PROPOSED CONSTRUCTION The proposed construction will consist of a single-family residence located on the site as shown on Figure 1. The residence will be a three-bedroom structure and include a walkout basement level and an attached garage. The OWTS will be designed for a total of three bedrooms. The proposed soil treatment area (STA) for the OWTS will be located to the northeast of the residence as shown on Figure 1. Water service will be provided by an existing on-site well located near the east edge of the property as shown in the inset on Figure 1. The route of the water supply line from the well to the residence has been roughly designed. If proposed construction is different than that described, we should be contacted to re-evaluate our design recommendations. SITE CONDITIONS The parcel was vacant with a rough-cut driveway to the proposed residence location at the time of our field exploration. There are two apparently abandoned water wells on the lot, one to the northwest of the proposed residence and the other near the southeast corner of the lot. Water will be supplied to the residence by a new well on the eastern edge of the lot, approximately 800 feet east of the proposed STA, see Figure 1. The terrain in the area of the proposed residence and proposed OWTS is moderately sloping down to the east at grades from about 8 to 12%. Vegetation consists of grass and weeds with sage brush and juniper trees. SUBSURFACE CONDITIONS The field exploration for the OWTS was conducted on July 9, 2020. Two profile pits (Profile Pits 1 and 2) were excavated with a mini-excavator at the approximate locations shown on - 2 - Kumar & Associates, Inc. Project No. 19-7-719.02 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. Log of Profile Pit 1 Depth USDA Classification 0-1’ TOPSOIL; organic Loam, firm, slightly moist, dark brown. 1’-4’ SILTY CLAY LOAM; strong blocky structure, very stiff, slightly moist, brown. 4’-5’ GRAVELLY SANDY LOAM; massive structure, medium dense, slightly moist, brown. 5’-6’ WEATHERED CLAYSTONE BEDROCK; hard, slightly moist, gray. • Disturbed bulk sample obtained from 2 to 3 feet. • Bottom of pit @ 6 feet where digging refusal with the mini-excavator occurred. • 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’-3½’ SILTY CLAY LOAM; strong blocky structure, very stiff, slightly moist, brown. 3½’-5’ GRAVELLY SANDY LOAM; massive structure, medium dense, slightly moist, brown. 5’-6’ WEATHERED CLAYSTONE BEDROCK; hard, slightly moist, gray. • Bottom of pit @ 6 feet where digging refusal with the min-excavator occurred. • No groundwater or redoximorphic features observed at time of pit excavation. The soils encountered in profile pits, below about 1 foot of organic topsoil, consisted of about 2½ to 3 feet of Silty Clay Loam overlying 1 to 1½ feet of gravelly Sandy Loam. Weathered claystone bedrock was encountered in both profile pits at 5 feet depth. Practical digging refusal was encountered with the mini-excavator in the bedrock due to hardness at depths of 6 feet in both pits. Hydrometer and gradation analyses were performed on a disturbed bulk sample of the Silty Clay Loam soils from Profile Pit 1 from 2 to 3 feet depth with the results provided on Figure 2. The tested sample (minus No. 10 size sieve fraction) classified as Silty Clay 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 excavation. We did not encounter groundwater in our borings drilled for the subsoil study at the residence site in December 2019. Based on the subsurface conditions and laboratory testing, the soils at the STA have been classified as Type 3 per State regulations, which equates to a long-term acceptance rate (LTAR) of 0.35 gallons per square foot per day. - 3 - Kumar & Associates, Inc. Project No. 19-7-719.02 OWTS ANALYSIS Based on the site conditions and profile pit evaluations, the evaluated area should be suitable for a conventional infiltration disposal system. The system will consist of chambers in a trench configuration based in the Silty Clay Loam soils. The STA will be sized for three bedrooms (six persons) and an average daily flow of 75 gallons per person and an LTAR of 0.35 gallons per square foot per day for the natural Silty Clay Loam soils. The effluent will gravity flow from the residence to the septic tank for primary treatment and then gravity flow to the STA for dispersal and final treatment. The STA will consist of three trenches with Infiltrator Quick 4 Plus Standard chambers. Equal distribution will be provided to the chambers and trenches by a distribution box. A 100 feet minimum setback is required from the STA to the onsite wells. Based on site plan measurements, the STA appears to be far outside any setbacks to the wells. The route of the planned water supply line to the residence is roughly planned as shown on Figure 1. The required setback of the water line to the septic tank is 10 feet, 5 feet for sewer and effluent lines, and 25 to the STA. The setback from the proposed water supply cistern is 50 feet to the sewer and effluent lines and septic tanks, and 100 feet to the STA. The sewer line as designed will encroach on the setback to the cistern and will cross the water line. The sewer line should be encased in larger diameter Schedule 40 pipe with both ends of the encasement capped and sealed watertight throughout the length of the encroachment. This needs to be verified in the field as part of our certification of the OWTS. 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, please contact us to re-evaluate our design recommendations. SOIL TREATMENT AREA • The STA will consist of three trenches with 25 Infiltrator Quick 4 Plus Standard chambers placed in each trench (75 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 0.35 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 900 square feet. Soil treatment area calculations are shown on Figure 3. - 4 - Kumar & Associates, Inc. Project No. 19-7-719.02 • A minimum of four feet of undisturbed soil between trenches is required. • Trench cut depths for the Infiltrators should be a maximum of 1 foot deep to provide a minimum 4 feet of separation to the weathered bedrock. • 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. • A minimum of 12 inches and a maximum of 24 inches of cover soil should be placed over the chambers. Additional cover soil should be placed between trenches as needed to provide a uniform ground surface. • 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 will likely be needed along the upslope 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 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 25 feet from the potable water supply line. • 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 • A Valley Precast 1,000 gallon, two-chamber septic tank should be used for primary treatment and dosing to the STA. A detail of the tank is provided as an attachment to this report. • An effluent filter should be installed in the tank outlet tee. • The tank must be a minimum of five feet from the residence. The tank must be a minimum of 10 feet from any potable water supply lines. The tank must be a minimum of 50 feet from any well or potable water supply cistern. - 5 - Kumar & Associates, Inc. Project No. 19-7-719.02 • 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 line 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 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 tank and potential sewage bypass of the first chamber of the tank. Due to the basement sewerline invert elevation, care will be needed to maintain a minimum 2% grade. • 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 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 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 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 pipe should be encased in larger diameter Schedule 40 PVC pipe anywhere that it encroaches on the setbacks to the potable water supply line and/or potable water supply cistern. The setbacks are 5 feet to potable water supply line and 50 feet to the potable water supply cistern. Encasement will be needed for the sewerline at the cistern setback and the waterline crossing. The encasement should be capped and sealed watertight at both ends. - 6 - Kumar & Associates, Inc. Project No. 19-7-719.02 • 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. 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. • Schedule 40 PVC pipe is required underneath any driveway and roadway 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 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. - 7 - Kumar & Associates, Inc. Project No. 19-7-719.02 • 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 leveling. 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 absorption system. • Liquid dishwasher and clothes washer detergent is recommended for households served - 8 - Kumar & Associates, Inc. Project No. 19-7-719.02 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, distribution box and STA at least annually for problems or signs of failure. • The filter should be cleaned at least annually by spray washing solids into the first chamber of 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 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 As-Built 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. Existin 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 4' Min. Undisturbed Soil Between Trenches 1' Maximum Cut Depth 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