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Home My WebLink Aboutpitkin.eh.264305300004 (2012)(2)Document Layout (From Most Recent to Oldest Permit) Permit Application Log Sheet/Notes & Photos Communications As -built Design Engineer Design Soil Information Water Permit & Information Second System on prope-rty Third System.etc. Floor Plans i Please See Building and Land Use Approvals Files for additional information. &SITE WASTEWATER TREA SYSTEM (OWTS) CONSTRUCTION PERMIT 76 Service Center Rd - Aspen, CO - 81611 Phone: 970.920.5070 Fax: 970.920.5374 Permit#: 0027.2012.powt Parcel ID#: 2643-053-000-04 Permit Issued: ❑NEW CDU []REPAIR OREMODEL/ADDITION ❑TANK ONLY []FIELD ONLY []AMENDMENT Owner(s): SAH Trust for Sarah A Schneider Property Address: 206 Letey Ln Legal Description: Size of Lot: 5.2 Size of Building: The system 3456 ftZ Acres Detached Accessory Unit: ®YES []NO 0 bedrooms Sq. Ft. Size of Accessory Unit: 1225 ft' Sq. Ft. Designed By: Sopris Engineering Project #: 12070 Phone #: 970-704-0311 Mailing Address: Fax #: Perc Rate: 10 Minimum Tank Capacity: 1126 Email Address: Dated: 10-10-12 Profile Hole Depth: 8 Depth to Groundwater or Bedrock: ➢ 8 ft Mons Minimum Absorption Area: 356 ftp (total) This OWTS Construction Permit is approved on the condition of compliance with the engineer design as submitted with the application and the specifications cited above. Changes must be approved by this Department and the engineer prior to construction. This permit is for the addition to an existing and approved OWTS (permit #79008) to increase the size to accommodate the 4 bedrooms in the main residence. The new system is designed to serve 5 bedrooms but the proposed new accessory structure does not include any bedrooms (only a'/z bath) and the additional bedroom in the design is for possible future expansion. The existing system consists of a 1000 gallon septic tank feeding a 11' deep, 6' diameter seepage pit. The new system will consist of the existing 1000 gallon septic tank feeding a new Orenco AX-RT25 advanced treatment septic tank. The '/ bathroom in the proposed new accessory structure will directly feed the Orenco AX -RT -25 tank. The effluent from the Orenco tank will then be pumped to the existing seepage pit and a new (20) Quick -4 Chamber leachfield via a "valved discharge assembly". The new leachfield will consist of (2) trenches with 10 Chambers in each row. The leachfield shall be a minimum of 110 feet to any well and 60 feet to any stream, pond, or irrigation ditch. This Permit must be kept on-site during installation. The engineer must do a final inspection of the installation and submit an "as -built" letter to this Department within 30 days of the final inspection, unless a longer period of time has been agreed upon, in writing. This Department must also be called for the final inspection with a minimum of 48 hours notice. Minimum horizontal distances between components of the system and physical features shall conform to the requirements of the Pitkin County OWTS Regulation. This Permit is conditioned upon the property owner(s) providing for regular inspection, cleaning, and maintenance of the system by qualified personnel, in accordance with the manufacturer's recommendations and the requirements of the Pitkin County OWTS Regulation. Issuance of this OWTS Construction Permit does not constitute a guarantee, warranty, or representation by the Department that the system will operate properly or will not fail. Issuance of this permit does not imply compliance with nor guarantee issuance of Pitkin County building and land use regulations/pernits. THIS PERMIT IS EXPRESSLY CONDITIONED UPON COMPLIANCE WITH ALL REQUIREMENTS OF THE PITKIN COUNTY OWTS REGULATION, INCLUDING BUT NOT LIMITED TO THOSE CONDITIONS SPECIFIED ABOVE. Plans and specifications for the proposed OWTS have been reviewed and are considered satisfactory. Permission is hereby given to the property owner(s) to perform the work indicated in accordance with the Pitkin County OWTS Regulation. This Permit will expire 1 year from the date of issuance unless construction on the system has commenced. An "as -built" drawing must be submitted and approved by EH before final approval of the system will be issued. Issued By: Date: 11/14/12 Expires: 11/14/13 Installer:FV e - - _- License #: -� ea on uthorized by: Finalr'rovall Issued By: O Date: It New Expiration Date.1 14 /(' G 2 0O Z';. 7,ot2. 90w'i O SITE WASTEWATER TREATME YSTEM (OWTS) FH/NR CONSTRUCTION PERMIT APPLICATION 76 Service Center Rd - Aspen, CO • 81611 Phone: 970.920.5070 Fax: 970.920.5374 Parcel IDI (available from the Pitkin County Assessor's Olrfce Company: %/ Q �} 970-920-5160 or at wwi,.oilkinassessor.orq : ; Purpose of Permit: ❑ NEW ❑ REPAIR DUE TO FAILURE (e<1 L7REMODEUADDIT[ON ❑TANK ONLY ❑ FIELD ONLY Cost of System Repair or RemodelfAddition (approximate): Fax Number. Property Address: SosYG-- l@ IenJille Lorn Wo Lot: Bkx]c: Filing: SUbdl on: W z,.l _ Property Owner(s)•: Email Addnss: J M Owners Mailing Address: City State, L Af Home Phone usiness Phone: *Conrad information must be omvided for Hie nwner �;,v. Number of Potential Bedrooms In or Fbrture List for the Accessory Unit: Primary Contact Person7ApplinM (d not owner): SQ "ay -o" hf�,rd Company: ContacttAppikam11 Mailing Address: p an bbs City, State, Zip: w co Cell Phone: o Business Phoria: Fax Number. Email Address: SosYG-- l@ IenJille Lorn Building Permit;r (if applicable): Lot Size (in acres): S 7 - Dale: Size of Building (square feet):? SC .PL Number of Potential Bedrooms: Detached Accessory Unit?�� DIES ❑ NO Size of Accessory Una (square feet). 6 Number of Potential Bedrooms In or Fbrture List for the Accessory Unit: o :, y aro r Water Source: L7 r-,� PRNATE WELL ❑ SURFACE WATER ❑ SPRING ❑ COMMUNITY/PUBLIC WATER SYSTEM Name of Community/Public Water System (if applicable): Engineering Firm: SJob Number i phoneu Number Fax Fax Number o serD,o V76.7 Of 70 a ji Address i, City, state Zipr dZ aiN- ..f :'00`6oi+A% 60 S L 13 PLEASE READ BEFORE SIGNING - 1 certify that the above information Is complete and accurate and that I have included In my application package. I acknowledge that EH/NR may revoke provided complete and accurate information in all of the documents any permit I am Issued B my application is found to contain any Inaccurate, false, or misleading information. 1 understand that no construction may be undertaken on an OWTS until an OWTS Construction Permit is issued. Ovmer Signature (Required): Date: �t�-lS�12 Applicant Signature: Dale: Ril by f. "StaN: Fee 6 ReoelPt V. Dale: 023 37i1�b ll L lZ Updated: 10/7T R Pitkin Coun y Environmental Health Department Contact Log Sheet Name: ParcelID#: Address: ..-Datp PersonSp-oken To . Comment /-Action to be Taken Initials time November 30, 2012 Bobby Peters Structural Associates 4185 County Rd Glenwood Springs, Co 81601 Bryan Daugherty REHS Pitkin County Environmental Health Department 76 Service Center Road, Aspen, CO 81611 RE: AS -BUILT, On-site Wastewater Treatment System (OWTS), Ward Residence, Accessory Building, 206 Letey Lane, Woody Creek, M/B, Tract in Sections 5&8,Township 9 Range 85, Pitkin County, Colorado SE Job No. 12070.01 Parcel Number: 264305300004. Permit No: 0027.2012.powt Dear Gentleman: Pursuant to County requirements, this letter provides documentation that the new Onsite Wastewater Treatment System (OWTS) recently installed at the above referenced site is in compliance with the permitted designs. Sopris Engineering inspected the excavations, soils, materials and the installation of the system components at various times during construction, prior to final backfill and after all installations were complete. The system constructed on site was designed and built to serve the needs of the main residential structure and a detached Accessory Unit. The installed Residential system was designed for a maximum 5 -bedroom residence. Sopris Engineering performed several visits to inspect and document the as built conditions of the constructed system. We have coordinated our efforts with the general contractor and the earthmoving contractor which constructed the system. The as built conditions and installation of the new OWS components is in compliance with Pitkin County Regulations; the design presented in the Sopris Engineering design drawing, dated October 8, 2012 and the revised plans dated October 22, 2012. The design criteria and system sizing information is summarized below. An As -built OWTS record drawing is attached delineating the As -built descriptions and location of the components. As -built System Component Installation A Valley Precast two chamber 1500 gallon concrete septic was installed with 12" tall PVC ribbed risers and fiberglass lids at the surface. The tank was tested watertight, installed level, bedded and backfilled with class 6 base material. A 4" Orenco effluent filter sanitary tee is installed on the new septic tank outlet. An Orenco AX -RT -25 recirculation treatment tank was installed next to the new primary septic tank. The unit is self-contained system that includes the filter material, recirculation pump and dosing pump. The treatment tank unit was installed level, bedded and backfilled with class 6 base material with the access lid at the surface. A 30" ribbed PVC sewage basin & simplex sewage pump assembly was installed next to the old septic tank to lift raw sewage to new primary septic tank. The old tank was crushed and backfilled in place. The sewer pipe from the house to the old tank was severed and a two way cleanout was installed on the pipe off the exterior wall of the residence. Another 30" ribbed PVC sewage basin & simplex sewage pump 502 Main Street • Suite A3 • Carbondale, CO 81623 (970) 704-0311 • Fax (970) 704 0313 Sopois ENGINEERING • LLC civil consultants y • Bobby Peters, Sturctural Associates Bryan Daugherty, Pitkin County EHD SE Job No. 12070.01 November 30, 2012 Page 2 assembly will be installed across the driveway next to the proposed Accessory Building to lift raw sewage to new primary septic tank. The Advantex treatment unit control, sewage pump station control and electrical sub panels were installed on the main house next to the existing electrical service panels. All control and electrical wires were installed in conduit as shown on the plans. Appropriate stubouts were installed to continue service wires and conduits to the proposed accessory building. Sub Surface Conditions and Testine A subsurface soil investigation was previously conducted at the time of original permit in 1979. The previous design and permit information indicates suitable soils consisting of sandy loamy gravel and cobbles below 3 feet with an average percolation rate of 6 MPI that was used for the existing seepage pit design. The new field addition is adjacent to the existing pit within the same benched area. The soil conditions during construction were found to be as described above with sandy loamy gravel and cobbles evident at 3 feet below the surface grade. During the excavation to recover the pit soils were observed to consist of sandy loam to a depth of 3 feet underlain by sandy loamy gravels and cobbles with less than 20% fines. This alluvial material is estimated to have a loading rate of 1.0 G/SF/D with an equivalent percolation rate of 10 mpi. The sizing calculation for the seepage pit perimeter sidewall area and the new trench system absorptive area is based on a percolation rate of 10 mpi with respect to the use of secondary treatment units. The pit and new field will only be used for the dispersal of secondary treated effluent. The excavation and layout of the site improvements were inspected by Sopris Engineering to confirm assumptions made for the proposed field. Existing Seepage Pit recovery, Inspection and retrofit The 7 foot depth of existing perforated barrel section were found to be in good shape with relatively clean gravel, no liquid level or evidence of bio staining. The top of the original lid was 6.5 feet below the improved lawn surface grade. The area was excavated to recover the structure and the top of 18' diameter gravel envelope surrounding the structure at a depth of 7 feet. The system consisted of three 2 -foot tall perforated concrete barrel sections and a single 1 -foot tall perforated section. The structure was capped with a 6 -inch thick concrete lid with 12 -inch square plug type access. The existing pit has been accepting septic tank effluent without ponding. The structure was sound, backfilled with gravel and appeared to function as designed. No evidence of excessive bio mat was observed. Because of the observed potential for effective continued use the pit was expanded prior to backfill of the excavation. The existing lid was removed and two new 2 -foot tall perforated concrete barrel sections were added with a new 12 thick concrete lid with eccentric access opening with an 8 -inch tall iron ring and cover. The pit extension was backfilled with 4.5 feet of 1 1/2 inch screened rock up to the top of the new perforated barrel sections. The gravel was covered with two sheets of non woven geotextile fabric. The gravel was placed across an approximate 16 by 20 foot oval area above the existing gravel. The remaining excavation, new lid and iron ring & cover was backfilled with native material to the existing lawn grade. During construction and installation of the OWTS improvement the new seepage pit was again recovered • Bobby Peters, Sturctural Associates Bryan Daugherty, Pitkin County EHD SE Job No. 12070.01 November 30, 2012 Page 3 to install the pressure line from the AX -RT -25 unit. A 4 inch deep grade ring was installed with the reset Iron ring and cover to bring the cover within 4 -inches of the finish landscape surface. The addition was added to provide additional dispersal capacity for an equivalent 4 -bedroom home since the original soil treatment system was designed for a 3 bedroom home. Design Criteria and Sizine Main House -and Accessory Building Pitkin County Permit Number 001.2011.powt Residence 5 -bedrooms @ 2 person /bedroom = 10 persons. The dwelling area is less than 6000 S.F. Max. Design flow (Qd) = # of people x 75(avg. flow gal/person/day) x 1.5 = gal/day Gallons per day for the subject house = 75 gal/person/day. Qd = 10*75*1.5 =1125 gal/day; Required Septage volume; V = 1125 gal/day * 1.25 = 1407 Soil Dispersal System Design Additional dispersal area is proposed due to the owners desire to have a minimum 5 -bedroom system capacity. The new dispersal field addition was designed based on utilizing the equivalent percolation rate for the native sand and gravel soils below 3 feet. The new absorption field will consist of two gravity dosed trenches utilizing gravelless leaching chambers. Treated effluent from the Advantex system will be equally distributed to the trenches through a new distribution box with flow regulators installed on the outlets. Treatment trenches and seepage pit Dispersal/Infiltration Area Design Average percolation rate of 10 minutes per inch. Standard absorption area equation yields: A (sf) = (4d *(t)%:: where A = Area; 5 t = time in minutes per inch=1 Ompi Qd =flow (gal/day) = 1125 gpd Use of Advantex treatment pods with excess tank capacity requires no added loading factors. A 30% reduction to Area for use of graveled trench chambers A(dispersal) = 1125 *(10)1/2 = 712 S.F. 5 The current seepage pit with the extension has 11 feet of perforated barrel sections backfilled within a 18 - foot gravel envelope with a calculated total sidewall area of 622 S.F. Number chambers: Use 20 Quick -4 chambers in 2 trenches with 10 each. The total horizontal dispersal area is 20 chambers x 9.87 S.F./chmbr =197 S.F. The total dispersal area of provided by the seepage pit and chamber field is 820 S.F. that is available for dispersal of treated effluent from the Advantex AX -RT -25 system. 0 • Bob y Peters, Sturctural Associates Bryan Daugherty, Pitkin County EHD SE Job No. 12070.01 Seepage Pit Gravel Envel'Depth Perimeter Area Dia. FT FT FT S.F. 18 7 57 = 396 18 4 57 = 226 Total sidewall Area = 622 New field chamber trenches No. chamber Area # S.F. 20 9.87 Horz area = 197 Total Dispersal Area = 820 OWS Operation and Maintenance November 30, 2012 Page 4 Ownership of the system and responsibility for maintenance and repair will remain with the property Owner. The Owner is required to retain the services of qualified personnel to inspect the OWTS and to perform all maintenance and repairs necessary to ensure that the system components are maintained in good operating condition and suitable vegetative cover is established on the fields. The components of the OWS system should inspected within 30 days of being placed into operation and should been inspected and maintained bi-annually through a maintenance service contract with an approved service provider. The treatment system components were supplied by Valley Precast and sold with a 3 -year maintenance contract that needs to be renewed indefinitely for the life of the system. The septic tank, filters, pumps, controls, dispersal systems and other system components should be visually inspected bi-annually for debris, damage, leaks, or other potential problems. In general, for a properly utilized system, septic tanks should be pumped every 2 - 4 years. The effluent filter should be cleaned every six months and at the time of pumping. Absorption fields should be maintained with suitable vegetative cover and kept free of root invasive plants. Positive surface drainage away from the absorption field should be maintained. If you have any question or need any additional information, please call. Sincerely, SOPRIS ENGINEERING, LLC Paul E. Rutledge Design Engineer Cc: Sarah Ward, Resident owner Troy Buster, Excavation Services Luis Menendez, Menendez Architects P.C. 0 0 OWTS DESIGN CALCULATIONS - for Pitkin Owner's Name Parcel ID # - House Size (sq. fL) (75 gpd or 100 gpd) 75 Number of Bedrooms in Main House Number of Offices, Libraries, Studies, Similar -sized Rooms in Main House Number of Bedroomas in Detached Caretaker unit Number of Offices, Studies, Sindlar-sized Rooms in Caretaker Unit (If the caretaker unit is ATTACHED, treat as if part of main house.) Average Daily Waste Flow 750 State Review R no Perc Rate (1) Design Flow (Q) = # potential bedrooms X 2 people/bedroom X gpd X 1.5 Q= 1125 Minimum tank capacity 1406 gallons Absorption Area (=Q/5 X SQRT pert rate)(IA loading factor) A = 996 sq. ft. of absorption area required Absorption Area (=Q/5 X SART perc rate) WITH SECONDARY TREATMENT (no loading factor) A= 712 sq. ft. of absorption area required Abs. Area w/ loading factor (B25) Trench Bed Quick4 Trench Quick4 Bed Pipe and Gravel (-10%) 897 no red. 996 91 101 Dosing (-20%) 797 (-20%) 797 81 81 Chambers (-30%) 697 (-10%) 897 71 91 Max Allowable( 50%1 498 (-30%) 697 5o 71 Secondary Treatment Abs Area w/ out loading factor (B28) Trench Bed Pipe and Gravel (-10%) 640 no red. 712 65 72 Dosing (-20%) 50 (-20%) 569 58 58 Clambers (-30%) 498 (-10%) 640 50 65 Max Allowable (-50%) Nk (,30%) 498 36 50 110 SETBACK FROM WELL # of feet = 60 SETBACK FROM POND, STREAM OR IRRIGATION DITCH # of feet = 35 SETBACK FROM DRY GULCH # of feet =