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Home My WebLink About1665 Cordillera Wy - 210701401035Environmental Health Department P.O. Box 179 500 Broadway Eagle, CO 81631-0179 Phone: (970) 328-8730 Fax: (970) 328-7185 Permit Permit No. OWTS-021505-2021 Permit Type: OWTS Permit Work Classification: New Permit Status: Active Issue Date: 6/11/2021 Expires: 10/12/2021 On-Site Wastewater Treatement System Project Address Parcel Number 1665 CORDILLERA WY, EDWARDS AREA,210701401035 Owner Information Address Mehrnaz Neyzari Phone: Cell: (202) 327-6000 Email: mehrnaz.neyzari@ey.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 Icon, Inc.iconinc@live.com(970) 977-0561OWTSPL-000115-20 21 Permitted Construction / Details: Install the new system exactly as depicted in the Kumar & Associates design dated May 11th, 2021, stamped and signed on May 12th, 2021 by David A Young, PE. The new system will be sized to accommodate the maximum daily flows for a 5 bedroom residence. This system was sized for the addition of a future bedroom for a total of 6 bedrooms. The OWTS consists of one sewer line from the residence. A Valley Precast 2,000 gallon, three-compartment concrete septic tank with a 2,500 gallon total volume shall be used with an effluent filter in the outlet tee. An Orenco PF3005 High Head effluent discharge pump will be used. The floats will be set to dose 52 gallons per dose. The STA consists of 4 rows of 14 Infiltrator Quick4 Plus Standard chambers for a total of 56. An ADV will be installed at the high point of the system. 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 Sell Date June 11, 2021 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 Friday, June 11, 2021 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: EDWARDS AREA - 1665 CORDILLERA - 509257 Permit Number: OWTS-021505-2021 Inspection Date: 08/18/2021 Inspector: Lewandowski, Claire Permit Type: OWTS Permit Inspection Type: OWTS Final Inspection Work Classification: NewOwner:Mehrnaz Neyzari Job Address:1665 CORDILLERA WY IVR Pin Number:193213 EDWARDS AREA, CO Project:<NONE> Parcel Number:210701401035 Contractor:Phone: (970) 748-8804 / Cell: (970) 977-0561Icon, Inc. Inspection Status: Approved Inspection Notes Inspector Comments Added Item: Septic Tank Passed. Inspection 8/2/21. Pump startup not complete. A Valley Precast 2,000 gallon, three-compartment concrete septic tank with a 2,500 gallon total volume was installed. Added Item: Record Drawing Received 4/17/2023 from K&A. Added Item: Record Photos Received 4/17/2023 from K&A. Added Item: Site and Soil Passed Setbacks confirmed. Received 5/26/2021 from K&A. Added Item: Final Certification Letter Received 4/17/2023 from K&A. Added Item: Pressure Distribution An Orenco PF3005 High Head effluent discharge pump will be used. The floats were set to dose 52 gallons per dose. Added Item: General Plan Passed. Received 5/26/2021 from K&A. Added Item: Soil Treatment Area (STA) Tuesday, April 18, 2023 For more information visit: http://www.eaglecounty.us Page 1 of 2 Passed. Inspection performed 8/2/21. approved backfill. The STA consists of 4 rows of 14 Infiltrator Quick4 Plus Standard chambers for a total of 56. Added Item: Identification of Systems Contractor Icon Inc was the licensed installer. Tuesday, April 18, 2023 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 April 14, 2023 Majid Padash and Mehrnaz Neyzari 7770 Norfolk Avenue, #1208 Bethesda, Maryland 20814 mehrnaz.neyzari@ey.com Project No. 21-7-275.02 Permit No. OWTS-021505-2021 Subject: Certification of Onsite Wastewater Treatment System, Proposed Padash Residence, Lot 33, Filing 1 & 2, Divide at Cordillera, 1665 Cordillera Way, Eagle County, Colorado Dear Majid and Mehrnaz: 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 Padash’s c/o WT Construction dated March 16, 2021. We previously designed the OWTS for the residence as submitted in our report dated May 11, 2021, Project No. 21-7-275.02. The system was designed for six bedrooms. The OWTS was installed by Icon, Inc. under Permit No. OWTS-021505-2021. We performed our as-built evaluations on August 2, 2021, and March 7, 2023. The OWTS components observed included: sewer line, cleanout, septic tank, effluent line, pump, automatic distributing valve (ADV), control panel 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 visits are included with this report. Installation of the sewer line between the residence and the septic was not observed. Pictures were provided by the installer. The distance locations to the septic tank shown on Figure 1 were made by taping. On March 7, 2023, after power had been supplied to the pump, a pump performance test was performed with adequate pump pressure observed. It is our opinion that the OWTS was installed in general conformance with the above referenced design. Kumar & Associates OWTS PHOTOGRAPH LOG PROPOSED PADASH RESIDENCE LOT 33, FILING 1 & 2, DIVIDE AT CORDILLERA 1665 CORDILLERA WAY EAGLE COUNTY, COLORADO Project No. 21-7-275.02 Photograph 1: Sewer line exiting residence and cleanout. (Provided by installer) Photograph 2: Sewer line to septic tank. (Provided by installer) OWTS PHOTOGRAPH LOG PROPOSED PADASH RESIDENCE LOT 33, FILING 1 & 2, DIVIDE AT CORDILLERA 1665 CORDILLERA WAY EAGLE COUNTY, COLORADO Project No. 21-7-275.02 Photograph 3: Valley Precast 2,000-gallon, 3-chamber septic tank. Photograph 4: Pump installed in the third chamber of the septic tank. OWTS PHOTOGRAPH LOG PROPOSED PADASH RESIDENCE LOT 33, FILING 1 & 2, DIVIDE AT CORDILLERA 1665 CORDILLERA WAY EAGLE COUNTY, COLORADO Project No. 21-7-275.02 Photograph 5: Orenco V6404 automatic distributing valve (ADV). Photograph 6: Effluent pipes to the soil treatment area (STA). OWTS PHOTOGRAPH LOG PROPOSED PADASH RESIDENCE LOT 33, FILING 1 & 2, DIVIDE AT CORDILLERA 1665 CORDILLERA WAY EAGLE COUNTY, COLORADO Project No. 21-7-275.02 Photograph 7: Observation ports installed and cleanouts. Photograph 8: Control panel. 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 PADASH RESIDENCE LOT 33, FILING 1 & 2, DIVIDE AT CORDILLERA 1665 CORDILLERA WAY EAGLE COUNTY, COLORADO PROJECT NO. 21-7-275 MAY 11, 2021 PREPARED FOR: WT CONSTRUCTION ATTN: RICK HERMES P.O. BOX 5127 EDWARDS, COLORADO 81632 (rickh@resortconceptsco.com) Kumar & Associates, Inc. ® Project No. 21-7-275 TABLE OF CONTENTS INTRODUCTION ...................................................................................................................... - 1 - BACKGROUND INFORMATION ........................................................................................... - 1 - PROPOSED CONSTRUCTION ................................................................................................ - 1 - SITE CONDITIONS ................................................................................................................... - 1 - SUBSURFACE CONDITIONS ................................................................................................. - 2 - OWTS ANALYSIS .................................................................................................................... - 3 - DESIGN RECOMMENDATIONS ............................................................................................ - 3 - SOIL TREATMENT AREA................................................................................................... - 4 - OWTS COMPONENTS ......................................................................................................... - 5 - OWTS OPERATION AND MAINTENANCE.......................................................................... - 8 - OWTS HOUSEHOLD OPERATION .................................................................................... - 8 - OWTS MAINTENANCE ....................................................................................................... - 9 - OWTS CONSTRUCTION OBSERVATION ............................................................................ - 9 - LIMITATIONS ........................................................................................................................... - 9 - 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 ARE CROSS SECTION FIGURE 6 – DISTRIBUTION LINE CLEANOUT DETAIL ATTACHMENTS VALLEY PRECAST 2,000 GALLON, THREE-CHAMBER SEPTIC TANK DETAIL ORENCO PF3005 PUMP PERFORMANCE CURVE Kumar & Associates, Inc. ® Project No. 21-7-275 INTRODUCTION This report provides the results of an onsite wastewater treatment system (OWTS) design for the proposed Padash residence to be located on Lot 33, Filing 1 & 2, Divide at Cordillera, 1665 Cordillera Way, 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 services were performed in general accordance to our agreement for professional services to WT Construction dated March 16, 2021. BACKGROUND INFORMATION We have been provided a previous OWTS design for a residence on the lot by Boundaries Unlimited. The design included a profile pit located in the area of the current proposed soil treatment area. Information from that profile pit has been considered in our OWTS design. PROPOSED CONSTRUCTION The residence will be a one-story structure over a partial walkout basement with an attached garage located on the lot as shown on Figure 1. The ground floors will be a combination of slab- on-grade and crawlspace. The basement floor will have a finish elevation of 8005 feet. The residence is proposed to have 5 bedrooms with the possibility of a sixth bedroom. The soil treatment area (STA) will be sized for 6 bedrooms. The STA for the OWTS will be located to the northeast of the proposed residence as shown on Figure 1. Water service will be provided by a public water supply from south of the proposed residence. The route of the water line to the residence has not yet been determined. If proposed construction is different than that described, we should be contacted to re-evaluate our design recommendations. SITE CONDITIONS At the time of our field exploration, the lot was vacant and the ground surface appeared mostly natural. The terrain is moderately steeply sloping down to the northwest at about 20 to 30% grade. The elevation difference across the proposed building foot-print is about 25 feet and across the STA foot-print is about 8 feet. Vegetation consists of dense trees and brush with an understory of grass and weeds. - 2 - Kumar & Associates, Inc. ® Project No. 21-7-275 SUBSURFACE CONDITIONS The field exploration for the OWTS was conducted on April 21, 2021. Two profile pits (Profile Pits 1 and 2) were excavated with a tracked excavator at the approximate locations shown on Figure 1 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’-2½’ TOPSOIL; organic loam, firm, moist, dark brown. 2½’-6’ WEATHERED SILTSTONE; medium hard, slightly moist, reddish brown. • Bottom of pit @ 6 feet where practical digging refusal with the excavator occured. • No free water or redoximorphic features observed at time of pit excavation. Log of Profile Pit 2 Depth USDA Classification 0’-3’ TOPSOIL; organic loam, firm, moist, dark brown. 3’-8’ LOAM; strong blocky structure, very stiff, slightly moist, brown to light brown. • Disturbed bulk sample obtained from 4 to 5 feet. • 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 2½ to 3 feet of topsoil consisted of Loam to the depths explored at Pits 1 of 8 feet. At Profile Pit 2, weathered siltstone was encountered at 2½ feet deep down to the pit depth of 6 feet. Practical digging refusal was encountered with the excavator in the siltstone bedrock due to its hardness. Hydrometer and gradation analyses were performed on a disturbed bulk sample of the soils from Profile Pit 2 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. The previous profile pit at the site by Boundaries Unlimited encountered silty loam soils to a depth of 6 feet underlain by weathered siltstone. Based on the profile pit tactile evaluations and laboratory testing, the soils have been classified as Soil Type 2 per State regulations. No free water was encountered in the pits nor indications of seasonal high groundwater observed at the time of the pit excavations. 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. - 3 - Kumar & Associates, Inc. ® Project No. 21-7-275 OWTS ANALYSIS Based on the site conditions and profile pit evaluations, the evaluated area should be suitable for a pressure-dosed infiltration soil treatment system consisting of chambers in a trench configuration. The STA will be located northeast and up-slope of the residence. Based on our review of the site and subsurface conditions, we believe there is adequate soil depth over the weathered siltstone in the planned STA for treatment of the effluent. The base of the soil treatment trenches will be in 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 six bedrooms and an average daily flow of 75 gallons per person with double occupancy in the first three bedrooms and single occupancy in the other two bedrooms for a total of 9 persons. The sewage will gravity flow from the residence to the septic tank for primary treatment and then be pressured-dosed on a regular basis to the STA for dispersal and final treatment. The STA will consist of four trenches with Infiltrator chambers. Equal distribution will be provided to the trenches by an automatic distribution valve (ADV). The pressure-dosing to the STA allows for a reduced field size. At the time of field exploration, access was limited by dense vegetation. Due to the presence of shallow bedrock in Profile Pit 1, an additional profile pit should be excavated near the north corner of the STA at the time of construction to confirm the soil type and depth at the design STA location. A 10 feet minimum setback from the STA is required to the property lines. The setbacks are shown on Figure 1. Setbacks of 10 and 25 feet are required from the drainage to the septic tank and STA, respectively. A 25 feet setback is required from the STA to any potable water supply lines. The required setback from potable water supply lines to the septic tank is 10 feet and to sewer and effluent lines is 5 feet, however, the location of the water supply line is currently not designed. If the water supply line is within any of the setbacks, we should be notified for additional recommendations. 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. - 4 - Kumar & Associates, Inc. ® Project No. 21-7-275 SOIL TREATMENT AREA • The STA will consist of four trenches with 14 Infiltrator Quick 4 Plus Standard chambers placed in the native Sandy Loam soils (56 chambers total). Equal distribution will be provided to the trenches by an automatic distribution valve (ADV). • 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 20% reduction of the STA size was applied for pressure-dosing to trenches and a 30% reduction of the STA size was applied for use of Infiltrator chambers in a trench configuration. The total STA is 672 square feet. Soil treatment area calculations are shown on Figure 3. • Distribution lines, consisting of 1.5-inch diameter, Schedule 40 piping, with 3/16-inch orifice holes drilled at 4-foot centers near the center of the chambers, should be installed along the complete length of the chambers, see Figure 4. The distribution lines should be suspended approximately 2 inches from the top surface of the infiltrators by pipe ties. The orifice holes should face up toward the chamber surface above. • A ⅛-inch hole should be drilled on the bottom of each end of the distribution pipe to allow for complete drainage of the distribution line following pressure dosing. Install splash plates below drain holes. • 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. • 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 vents 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. - 5 - Kumar & Associates, Inc. ® Project No. 21-7-275 • A plan view of the STA is presented on Figure 4 and a cross section of the STA is presented on Figure 5. • The STA must have a minimum 25 feet setback to the on-site water supply line. • The STA must have a minimum 10 feet setback from the lot property line. • The STA must have a minimum 25 feet setback to the drainage. • The STA must have a minimum 10 feet setback to the residence. • The STA must have a minimum 5 feet setback to the septic tank. 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 2,000 gallon, three-chamber septic tank (2,500 gallons total) will be used for primary treatment and dosing to the STA. The first two chambers of the tank will be utilized for treatment and settling, and the third chamber will contain the dosing pump. A detail of the tank is provided as an attachment to the report. • A submersible effluent pump enclosed in a Biotube Pump Vault will be installed in the third chamber. • The tank must be a minimum of 5 feet from the residence and from the STA. The tank must be a minimum of 10 feet from any potable water supply lines and 10 feet from the drainage. • 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 is required beneath all driveway surfaces - 6 - Kumar & Associates, Inc. ® Project No. 21-7-275 • The sewer pipe should be double encased with larger diameter Schedule 40 PVC pipe within 10 feet encroachment on either side of the drainage. • 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. 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 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 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 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 more than one sewer line exiting the building. Effluent Transport Piping • The effluent transport pipe should be 1.5-inch diameter Schedule 40 PVC piping sloped at 2% minimum to drain back from the ADV to the dose tank and from the ADV to each trench. The ADV should be the high point of the system. • 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. - 7 - Kumar & Associates, Inc. ® Project No. 21-7-275 • 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. • All 90-degree bends should be installed using a 90 degree long-sweep or by using two 45-degree elbows. Effluent Pumping System • An Orenco PF3005, 115-volt, submersible effluent pump with a 1.25-inch diameter discharge assembly, or equivalent, will be required for effluent pumping. • The maximum effluent transport distance from the pump discharge to the STA estimated to be 43 feet. • The elevation difference from pump discharge to the STA is estimated to be about 6 feet. • The pump should be enclosed in an Orenco Biotube Pump Vault for effluent filtering and protection of the pump from vibration. • An equivalent pump must be capable of operating at 14.7 gallons per minute at 13.5 feet of total dynamic head. A pump performance curve for the specified pump is provided as an attachment to this report. • The floats should be set to provide a dose volume of approximately 52 gallons. The actual dose volume will be about 51 gallons assuming 1 gallon of drainback in the transport line. To achieve the desired dose volume, the upper (“ON”) and lower (“OFF”) floats should be set approximately 5 inches apart. • The flow differential between the first and last orifices is estimated to be 2.6%. • The high-water alarm float should be placed approximately 3 inches above the “ON” float in the dose tank. The high-water alarm must be wired on a separate electrical circuit from the pump. • An ⅛-inch diameter weep hole should be drilled in the effluent transport line prior to exiting the dose tank so the transport line can drain after each pumping cycle. Automatic Distributing Valve • An Orenco V6404 Automatic Distributing Valve (ADV) will be used to distribute effluent to the five trenches. • The ADV must be installed level and must be the high point in the system. • The ADV should be installed in a sprinkler box, or equivalent, such that it is serviceable and protected from freezing. We recommend the ADV be equipped with heat tape for additional frost protection during winter months. - 8 - Kumar & Associates, Inc. ® Project No. 21-7-275 • We recommend the ground surface be graded away from the ADV in all directions. Improper surface drainage could cause standing water to freeze and damage the valve and/or piping. • The valve has clear sections of pipe that should be inspected at least annually to ensure that it is alternating doses to each trench. 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 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 - 9 - Kumar & Associates, Inc. ® Project No. 21-7-275 weather. We recommend that a tank heater be installed in this system to help prevent freezing. OWTS MAINTENANCE • Inspect the septic tank, pump, pump vault filter, ADV 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 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 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 $OOSLSLQJsKoXOGKDYeDUDtLQJoI6FKeGXOeoUstUoQJeU &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. E x i 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 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. Ground Surface Insulate lid with 2" blue board Backfill valve box to bottom of cap with onsite soil 1.5" Sch. 40, 90° long-sweep or two 45° elbows 1.5" Sch. 40, threaded cap Install 6" valve box at ground surface Kumar & Associates APPROXIMATE SCALE: 1 INCH = 3 FEET Notes: 1.All piping, fittings and valves should be Sch. 40 P9C. 2.Install distribution line cleanouts at the end of each distribution line. Pump Selection for a Pressurized System - Single Family Residence Project 21-7-275 / Lot 33, Divide at Cordillera Parameters Discharge Assembly Size Transport Length Before Valve Transport Pipe Class Transport Line Size Distributing Valve Model Transport Length After Valve Transport Pipe Class Transport Pipe Size Max Elevation Lift Manifold Length Manifold Pipe Class Manifold Pipe Size Number of Laterals per Cell Lateral Length Lateral Pipe Class Lateral Pipe Size Orifice Size Orifice Spacing Residual Head Flow Meter 'Add-on' Friction Losses 1.25 5 40 1.50 6404 38 40 1.50 3 0 40 1.50 4 56 40 1.50 3/16 4 5 None 0 inches feet inches feet inches feet feet inches feet inches inches feet feet inches feet Calculations Minimum Flow Rate per Orifice Number of Orifices per Zone Total Flow Rate per Zone Number of Laterals per Zone % Flow Differential 1st/Last Orifice Transport Velocity Before Valve Transport Velocity After Valve 0.97 15 14.7 1 2.6 2.3 2.3 gpm gpm % fps fps Frictional Head Losses Loss through Discharge Loss in Transport Before Valve Loss through Valve Loss in Transport after Valve Loss in Manifold Loss in Laterals Loss through Flowmeter 'Add-on' Friction Losses 1.5 0.1 3.0 0.5 0.0 0.3 0.0 0.0 feet feet feet feet feet feet feet feet Pipe Volumes Vol of Transport Line Before Valve Vol of Transport Line After Valve Vol of Manifold Vol of Laterals per Zone Total Vol Before Valve Total Vol After Valve 0.5 4.0 0.0 5.9 0.5 9.9 gals gals gals gals gals gals Minimum Pump Requirements Design Flow Rate Total Dynamic Head 14.7 13.5 gpm feet 0 5 10 15 20 25 30 35 40 0 50 100 150 200 250 300 Net Discharge (gpm) PumpData PF3005 High Head Effluent Pump 30 GPM, 1/2HP 115/230V 1Ø 60Hz, 200V 3Ø 60Hz Legend System Curve: Pump Curve: Pump Optimal Range: Operating Point: Design Point: 8/19/2021 Eagle County Government Mail - Inspection request - OWTS-021505-2021 https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&search=all&permmsgid=msg-f%3A1708469627292906842&simpl=msg-f%3A17084696272…1/5 Claire Lewandowski <claire.lewandowski@eaglecounty.us> Inspection request - OWTS-021505-2021 Albert Quintana <iconinc@live.com>Wed, Aug 18, 2021 at 3:53 PM To: Danielle Sell <danielle.sell@eaglecounty.us>, Albert Quintana <iconinc@live.com> Cc: Mehrnaz Neyzari <mehrnaz.neyzari@ey.com>, "environment@eaglecounty.us" <environment@eaglecounty.us>, Shane Mello <smello@kumarusa.com> Photos requested by Claire at inspection, please confirm Claire has received them 8/19/2021 Eagle County Government Mail - Inspection request - OWTS-021505-2021 https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&search=all&permmsgid=msg-f%3A1708469627292906842&simpl=msg-f%3A17084696272…2/5 8/19/2021 Eagle County Government Mail - Inspection request - OWTS-021505-2021 https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&search=all&permmsgid=msg-f%3A1708469627292906842&simpl=msg-f%3A17084696272…3/5 8/19/2021 Eagle County Government Mail - Inspection request - OWTS-021505-2021 https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&search=all&permmsgid=msg-f%3A1708469627292906842&simpl=msg-f%3A17084696272…4/5 8/19/2021 Eagle County Government Mail - Inspection request - OWTS-021505-2021 https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&search=all&permmsgid=msg-f%3A1708469627292906842&simpl=msg-f%3A17084696272…5/5 Sent from my iPhone On Aug 2, 2021, at 9:05 AM, Albert Quintana <iconinc@live.com> wrote: Sounds good, I have an appointment in Glenwood at 11 today so thanks for making 9:30 work. 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