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HomeMy WebLinkAbout2200 Spring Creek Rd 2 - 211115302002Work Classification:Alteration PO BOX 4874 EAGLE CO 81631- AddressOwner Information Permit Status:Active Project Address 211115302002 Permit Type:OWTS Permit Permit NO.OWTS-6-15-12744 Expires:10/28/2015Issue Date:6/30/2015 Parcel No. 2240 SPRING CREEK RD Suite: 2 Private Wastewater System Environmental Health Department P.O. Box 179 500 Broadway Eagle, CO 81631-0179 Phone: (970)328-8755 Fax: (970)328-8788 Phone:(970)331-1209 Cell: Inspection For Inspections call:(970) 328-8755 Inspections: IVR OWTS Final Inspection 095 PhoneEngineer(s) (970)945-7988HP GEOTECH Contractor(s)Phone Primary ContractorLicense Number JAKOB SCHWAIGER (970)331-1209 Yes33-15 JAKOB SCHWAIGER JAKOB SCHWAIGER Permitted Construction / Details: Installation of the OWTS exactly as described in the HP Geotech design report signed, stamped and dated June 26, 2015. The system is designed to served a 4 bedroom residence. OWTS consists of the installation of a new1,250 gallon Valley Precast two compartment septic tank with effluent filter on the outlet tee and connection to the existing2,025 square foot soil treatment area as described in the design report. The driveway crossing of the effluent line should be checked to assure that schedule40 pvc or a double encasement was used and frost protection incorporated. The existing 1,000 gallon septic tank must be abandoned as described in the design report. Contact the design engineer to conduct all inspections necessary to certify the installation and to verify abandonment of the existing tank. System certification along with as-built drawings and photos must be submitted to and approved by Eagle County Environmental Health prior to the use of the system or occupancy of the new residence. Issued by: Environmental Health Department, Eagle County, CO June 30, 2015 Date Customer Copy Ray Merry CONDITIONS: 1. THIS PERMIT 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 2. ALL INSTALLATIONS MUST COMPLY WITH ALL REQUIREMENTS OF THE EAGLE COUNTY INDIVIDUAL SEWAGE DISPOSAL SYSTEM REGULATIONS ADOPTED PURSUANT TO AUTHORITY GRANTED IN C.R.S. 25-10-101,et seq., AS AMENDED 3. THIS PERMIT IS VALID ONLY FOR CONNECTION TO 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. CHAPTER IV, SECTION 4.03.29 REQUIRES ANY PERSON WHO CONSTRUCTS, ALTERS OR INSTALLS AN INDIVIDUAL SEWAGE DISPOSAL SYSTEM TO BE LICENSED June 16, 2017 Jakob Schwaiger PO Box 4874 Eagle, CO 81631 jakeschwaiger@gmail.com RE: Final approval of septic permit OWTS-6-16-12744; Tax parcel #211115302002; Property location: 2240 Spring Creek Rd., Gypsum area Jake, This letter is to inform you that the above-referenced septic permit has been inspected and finalized. This permit was approved and sized for a total capacity for 4 bedrooms. Additional information about the maintenance your septic system needs can be accessed through web site links provided on the Environmental Health Department’s home page at http://www.eaglecounty.us/envHealth/ 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 tap roots, irrigation systems and parking areas above the drain field can cause 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. By following a few simple guidelines, like avoiding grease or other additives down the drain and making sure your septic tank is on a pumping schedule, your system has been designed to last for many years. If you have any questions regarding this information, please contact us at (970) 328-8755 and reference the OWTS septic permit number. Sincerely, Terri Vroman Administrative Technician IV cc: OWTS electronic permit folder Energov electronic file HP Kumar project 115 182B DEPARTMENT OF ENVIRONMENTAL HEALTH (970) 328-8755 FAX: (970) 328-8788 TOLL FREE: 800-225-6136 www.eaglecounty.us RAYMOND P. MERRY, REHS Director Hepworth-Pawlak Geotechnical, Inc. 5020 County Road 154 Glenwood Springs, Colorado 816 01 Phone: 970 -945-7988 Fax: 970 -945-8454 Email: hpgeo@hpgeotech.com HEPWORTH -PAWLAK GEOTECHNICAL June 26, 2015 JEV Construction Attn: Jake Schwaiger P. O. Box 4874 Eagle, Colorado 81631 jakeschwaiger@gmail.com Job No. 115 182B Subject: Review of Onsite Wastewater Treatment Systems, Lots 2 and 3, Ute Springs Ranch, Spring Creek Road, Eagle County, Colorado. Dear Mr. Schwaiger: As requested, we have reviewed proposed changes to the Onsite Wastewater Treatment Systems (OWTS) at the subject properties. Our findings and recommendations are presented below. The services are supplemental to our agreement for professional services to JEV Construction dated April 28, 2015. Hepworth-Pawlak Geotechnical recently prepared a subsoil study for foundation design for the proposed residence on Lot 2 at the site and presented our findings in a report dated May 29, 2015, Job No. 115 182A. Background Information: The existing OWTS, which is currently shared between Lots 2 and 3, was constructed in 2002 to serve the Vail Learning Camp and its associated facilities. The original construction consisted of a lodge located on Lot 3 and a series of yurts on Lot 2. Primary septic tank storage capacity is located on Lot 3 adjacent to the former lodge as shown on Figure 1. The tank system consist of a 1,000 gallon grease trap tank, 2,500 gallon septic tank, 1,000 gallon septic tank and a 1,250 gallon dose tank equipped with dual alternating siphons. The siphons alternate doses of effluent between the soil treatment area (STA) on Lot 2 and the STA on Lot 3. There is also a yurt privy located on Lot 2 with a 1,000 gallon septic tank that gravity flows to the STA on Lot 2. The STA on Lot 2 consists of a series of seven trenches with Infiltrator Standard chambers that are 6.25 feet long by 3 feet wide. The first three rows of the STA have 16 chambers and the following four rows have 15 chambers per trench for a total of 108 chambers. The STA on Lot 3 consists of seven trenches with 15 Infiltrator Standard chambers in each trench for a total of 105 chambers. The property is no longer used as the Vail Learning Camp. The former lodge on Lot 3 has been converted to a three bedroom residence, and a new residence is planned on Lot 2. JEV Construction June 26, 2015 Page 2 Job No. 115 182B Proposed Construction: The owner of Lot 2 is proposing to construct a four bedroom residence on the property located as shown on Figure 1. The STA that is currently on Lot 2 is planned to be utilized for effluent treatment for the residence. The owner of Lot 3 intends to continue to utilize that OWTS for the three bedroom residence. Subsurface Conditions: The subsurface conditions at the site were evaluated by excavating two exploratory pits for our previous subsoil study and review of Alpine Engineering’s septic s ystem application and design dated December 27, 2001. The subsoils observed by us in the area of the proposed residence on Lot 2, below about ½ foot of organic topsoil, consisted of medium stiff, sandy to very sandy silt and clay (Silt Loam to Silty Clay Loam per USDA classification) that extended down to the pit depths of 7½ and 8½ feet. No free water was observed in the pits at the time of excavation and the soils were slightly moist. For their previous design, Alpine Engineering observed two profile pits in the vicinity of the STA on Lot 3. The soil conditions encountered consisted of about 3 to 4 feet of Silty/Sandy Loam overlying 1 foot of Sandy Gravelly Silty Loam, overlying 1 to 2 feet of Silty Sandy Loam, overlying evaporate bedrock. For the purposed of our review, we have assumed a (somewhat conservative) Long-Term Acceptance Rate (LTAR) of 0.35 gallons per square foot per day (Soil Type 3) for our STA calculations for both Lots 2 and 3. OWTS Analysis: Based on the existing and proposed construction, our recommendations are provided below. The recommendations are based on our understanding of the existing OWTS construction, the proposed construction, the site and subsurface conditions encountered and our experience in the area. If conditions encountered, during construction are different than those that are described in this report please contact us and we will re-evaluate our design recommendations. Soil Treatment Areas: The STAs for Lots 2 and 3 are proposed for continued use in their new configurations. Discussion, details and calculations are provided below. Lot 2 - STA:  The proposed residence will have four bedrooms and an estimated average daily flow of 600 gallons per day.  The STA on Lot 2 consists of seven trenches with Infiltrator chambers connected in a serial distribution network. The location of the STA is shown on Figure 1. The first three trenches contain 16 Infiltrator Standard chambers and the following four rows contain 15 chambers for a total of 108 chambers and a total STA of 2,025 square feet.  Based on an assumed LTAR of 0.35 gallons per square foot per day, an average daily flow of 600 gallons per day and a 30% reduction for using chambers, the JEV Construction June 26, 2015 Page 3 Job No. 115 182B required STA for the residence is 1,200 square feet. Therefore, the existing STA is considered sufficient for the proposed flow from the residence. Lot 2 - Septic Tanks: Septic tank details and installation specifications are provided below.  Based on As-Built information provided by Eagle County, there is an existing 1,000 gallon septic tank location on the property. The existing tank is undersized for a four bedroom residence and will need to be replaced with a larger tank. The existing tank should be pumped dry and either be removed for disposal or the base and lid of the tank can be broken and be backfilled in place with onsite soil to prevent collection of water.  A 1,250 gallon, two chamber Valley Precast septic tank is needed for the new OWTS. An effluent filter should be installed in the tank outlet tee. A copy of the tank detail is provided as an attachment to this report.  Effluent will gravity flow from the residence to the septic tank then to the STA.  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 gravel road base bedding material may be necessary to prevent tank damage during placement and act as a leveling course.  Install tank with 2 feet minimum cover soil for frost protection. Maximum tank soil cover depth is 4 feet.  The septic lids must extend to final surface grade and made to be easily located. Lot 2 - Sewer and Effluent Lines:  The sewer and effluent lines should not be less than the diameter of the building drain and not less than 4 inches in diameter.  The sewer and effluent piping should have a rating of SDR35 or better.  The sewer pipe should be sloped between 2% to 4%. Slopes between 2% and 4% are sufficient to maintain adequate flow, but are shallow enough 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.  The effluent pipe should have a minimum slope of 2%.  A minimum 36 inches of cover soil should be provided over the sewer and effluent piping. Paved areas, patios or other areas without vegetative cover may be more susceptible to frost. We recommend 48 inches of soil cover over the piping 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 piping should be well 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 piping. JEV Construction June 26, 2015 Page 4 Job No. 115 182B  Install cleanout pipes within 5 feet of the building foundation, where piping bends 90 degrees or more and every 100 feet of piping.  All 90 degree bends should be installed using a 90 degree long-sweep or by using two 45 degree elbows.  The location where the effluent pipe from the dose tank on Lot 3 connects to the STA on Lot 2 should be abandoned and replaced with two 45 degree elbows to connect into the first trench as shown on Figure 1.  The remaining portions of the existing effluent line on the property may continue to be used where possible for connection to the new septic tank. Lot 3 - STA:  The existing residence has three bedrooms and an estimated average daily flow of 450 gallons per day.  The STA on Lot 3 consists of seven trenches with Infiltrator chambers connected in a serial distribution network. The location of the STA is shown on Figure 1. The STA contain seven trenches with 15 chambers per trench for a total of 105 chambers and a total STA of 1,969 square feet.  Based on an assumed LTAR of 0.35 gallons per square foot per day, an average daily flow of 450 gallons per day and a 30% reduction for using chambers, the required STA for the residence is 900 square feet. Therefore, the existing STA is considered sufficient for the proposed flow from the residence. Lot 3 - Septic Tanks: The owners of Lot 3 have determined that they wish to continue use of the existing septic tanks in their current configuration with modifications to the dual alternating automatic siphons. The tank capacities exceed the required 1,000 gallon tank volume for a 3 bedroom residence as required by current regulations. Details are described below.  The existing tanks on Lot 3 consists of a 1,000 gallon grease trap tank, 2,500 gallon septic tank, 1,000 gallon septic tank and a 1,250 gallon dose tank equipped with dual alternating siphons.  The dual alternating automatic siphons currently alternate doses of effluent to the STAs on Lots 2 and 3. The dose tank must be pumped dry and the automatic siphon that directs effluent to Lot 2 must be removed. The tank outlet likely consists of a rubber gasket “Fernco” fitting. A short piece of SDR35 pipe matching the diameter of the fitting should be placed through the penetration. A cap should be glued on each side of the length of pipe and the fitting tightened preventing any water escape from the tank. The penetration through the tank should be observed and tested for water tightness by us prior to backfill.  Based on review of the Alpine Engineering documents, the siphon will provide a dose volume of about 225 gallons per dose to the STA.  It may be necessary to re-prime the remaining automatic siphon during construction. Automatic siphon operation will need to be verified by us during as part of our As-Built inspection. JEV Construction June 26, 2015 Page 5 Job No. 115 182B 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 also be prudent. Below are some basic recommendations for the OWTS O&M.  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 STA.  Do not irrigate the area on top of or directly upgradient of the STA as this may cause a hydraulic overload.  Do not dispose of household waste down household 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 STA.  Liquid dishwasher and clothes washer detergent are recommended for households served by an OWTS. Clay substances used as fillers in powder detergents may result in clogging of the STA.  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.  Inspect septic tanks, effluent filters and soil treatment areas at least annually for problems or signs of failure.  The effluent filter should be cleaned annually by spray washing solids into the first chamber of the septic tank.  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 soil absorption area, 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.