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HomeMy WebLinkAboutSCHROEDER EAST BLK 6 LT 10Schroeder East Block 6 Lot 10 #050-071-21 Permit Number: Tax Code Number: Work Type: On-Site Wastewater Disposal System Permit OSP151114 05007121000 Septic MUNICIPALITY OF ANCHORAGE Development Services Department On-Site Water & Wastewater Program 4700 EImore Road, PO Box 196650 Anchorage, AK 99519-6650 Telephone: (907) 343-7904 Initial Permit Effective Dates: May 11, 2015 to May 10, 2016 Design Engineer: ANDERSON ENGINEERING Subdivision: SCHROEDER EAST Site Legal Address: SCHROEDER EAST BLK 6 LT 10 G:0353 Owner/Address: TROY DAVIS HOMES INC 165 EAST PARKS HIGHWAY STE 200 WASILLA AK 996547059 Site Mailing Address: 17548 SANTA MARIA DR, Eagle River Department Lot Size in Sq Ft: 20708 Total Bedrooms: 3 This permit is for the construction of: Y Disposal Field Y Septic Tank N Holding Tank N Privy N Private Well N Water Storage All construction must be in accordance with: 1. The attached approved design. 2. All requirements specified in Anchorage Municipal code Chapters 15.55 and 15.65 and the State of Alaska Wastewater Disposal Regulations (18AAC72) and Drinking Water Regulations (ISAACS0). 3. The wastewater code requires inspections during the installation. The engineer must notify the Development Services Department at least 2 hours prior to each inspection. Provide notification by calling (907) 343-7904 (24 hours). 4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather must either: A. Open and Close on the same day. B. Covered, sealed, and heated to prevent freezing. Date: MUNICIPALITY OF ANCHORAGE Phone: 907-343 ,927_~.~ Community Development Department Development Services Division Fax~' ~.,,_~ On-Site Water & Wastewater Program ON-SITE SEWER/WELL PERMIT APPLICATION Parcel I.D. 050-071-21 Properly owner(s) Troy Davis Homes Day phone Mailing address 165 E. Parks Highway #200 Wasilla, AK 99654 Site address 17546 Santa Maria Drive Eagle River, AK 99577 Legal description (Sub'd., Block & Lot) Schroeder East, Block 6, Lot 10 Legal description (Township, Range & Section) Lot Size 20,708 . Sq. Ft. Number of Bedrooms .Three APPLICATION IS FOR: APPLICATION IS AN: TYPE OF DWELLING: (~] all that apply) Absorption Field [] Initial [] Single Family (SF) [] (w/wo ADU) Septic Tank [] Upgrade [] Duplex (D) [] Holding Tank [] Renewal [] Multiple Dwellings [] Privy [] (SF and/or D) Private Well [] Water Storage [] THIS APPLICATION INCLUDES A VARIANCE / WAIVER REQUEST FOR: Dis tance: I certify that the above information is correct. I further certify that this is in accordance with applicable Municipal Codes. (Signature of property owner or authorized agent) permit/Rush Fees: ~ .¢"~[,~f0 ~' ~/'0,~/~Waiver Fees: Date of Payment: '~/¢//~"' ~ Date of Payment: Receipt Number: 0~':~~'' Receipt Number: Permit No. O~ i¢[~ lll~ waiver No. ANCHORAGE, AK99524 ' 522-7773 677-7766 (FAX) May 9, 2015 Municipality of Anchorage Development Services Department On-Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Subject: Lot 10, Block 6, Schroeder Subdivision East Addition Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of the subject lot intends to construct a three bedroom home. We are therefore requesting a permit be issued for the construction of a new septic system to accommodate the home. The attached Site Plan and backup'documentation identify the location and configuration of the proposed septic system. The subdivision is served by the AWWU water system and a service will be extended to this lot. No existing wells or septic systems are closer than 100' from the proposed septic system Drainage arrows are shown on the site plan showing the grade and direction of flow on the lot. The drainage pattern will not be changed as a result of this project. The test hole placed on the lot in the area of the proposed absorption trench indicated silty sand and gravel (GM/SM) material. The percolation rate of the soil was determined to be 4.6 minutes per inch. Groundwater was found at 8' during the placement of the test hole and stabilized at 6' below the surface during the monitoring period which included a recent inspection. An application rate of 1.2 gallons per day per square foot was used in the design of the absorption system. We are proposing to place a new 1,250-gallon STEP tank and 2-33" long by 5' wide by 1' effective depth absorption trenches to treat and dispose of the effluent generated in the house. The elevation of the distribution line in the absorption trench will be 1' below the surface and the total depth will be 2'. A minimum of 3' of fill or 2" of insulation and 2' of fill will be placed over the absorption trench and 4' over the septic tank. The ground surface on the lot in the area of the absorption trench slopes to the southeast at approximately 2%. The new trenches will be constructed parallel with the contours of the slope as much as possible in conformance with Municipal requirements. The new septic system will be constructed a minimum of 100' from all wells and any Lot 10, Block 6, Schroeder Subdivision East Addn. May 9, 2015 Page Two wells and any surface water and 10' from the proposed and existing water services in the area. If the system is constructed in accordance with our design the following statements apply: to The system, if constructed as designed, will have no adverse impact on the wells in the area or those to be constructed in the future. 2. The system, if constructed as designed, will have no adverse impact on existing septic systems in the area or those to be constructed in the future. 3. The system, if constructed as designed, will have no adverse impact On reserve space, either surface or subsurface, on any lots located in the area. The system, if constructed as designed, will have no adverse impact on drainage patterns in the area. The current drainage pattern will be maintained. Sincerely, Michael E. Anderson, P.E. Attachments , / 9 / / 8 11 VACANT / I / AREA MAP NOTE: Subdivision is Served by AWWU Woter System. No Conflicts with Adjocent Wells or Septic Systems. SCALE 1' : 60' SCHROEDER LOT SUBDIVISION EAST 10, BLOCK 6 20,708 S.F. ADDN. 30. O0 66' Long x 5' Wide x 1' Effective Depth Absorption Trench. 9 30.00 MT 1,250 Gallon ' Step Tank Three Bedroom House 10 11 NOTE: No Areas of Excessive Slope or Surface Water ore Within 100' of Any Port of the New Septic ;9.61 SITE PLAN SCALE 1' = 30' ALTERNATE SITE: Advontex Treatment Sytem w/14' Long x ,5' Wide x 1' Effective Depth Absorption Trench. Appl Rate 6 GPO/SF / / / / / / / / / //s / , / / / 6 LEGEND SV - Septic Vent CO - Clean Out MT - Monitor Tube TH - Test Hole MH - Man Hole LOT 10, BLOCK 6, SCHROEDER EAST SUBDIVISION DESIGN FACTORS: Three Bedroom Home Perc. Rate: 1-5 Min./Inch Application Rate: 1.2 GPD/SF SYSTEM REQUIREMENTS: 5' Wide Trench System 1,250 Gallon STEP Ta[~k 1' Drainfield Rock Pressure Distribution System 3 Bedrooms * 150 GPD/Bedroom = 375 SF Absorption Area 375 SF/1.2 GPDISF/5 SF (Width) *.87 (Red. Factor)= 65.25 LF Trench Length THEREFORE: Construct 2 - 33" Long x 5' Wide x 1' Effective Depth Absorption Trenches at the Location Shown. Flowline Elevation to be 1' Below the Existing Ground Elevation. Total Depth to be 2' Below Existing Ground. Provide 4' of Cover Over Septic Tank and 3' of Cover Over Absorption Trench. Maintain 200' Separation From Class A Well in the Neighborhood. ell 110" ~ Geotextile Fabric 1" Perforated PVC (Holes Down) 15 - 3/16" Holes @ 2.2' Each Lateral Drainfield Rock TYPICAL 5' WIDE TRENCH SECTION SCA,E) .......... NOTE: Grade Area .Over Trench to Drain Away. ~'.~ ~ · . , . ,"' 49th M~mmum 6 Separabon From Bedrock. · ,,........~.....~......¢, .......... ./..]z....~ Minimum 4' Separation From Groundwater. t Minimum 200' Separation From Class A Well in the Area. ~'~ ,~0,^~,.^,'""""'"'"'""~¢-'~;'~'"?"~ Minimum 100' Separation From Surface Water or Streams· ~,.~'.,.. No. c~4~, ./.~..~ 4700 DEPTH (feet) 1 2 3 4 5 6 7 8 9 11 20' MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT BRAGAW STREET ANCHORAGE, AK 99519-6650 SOILS LOG - PERCOLATION TEST LEGAL DESCRIPTION: PERFORMED FOR: DATE: 2/27/15 PARCEL ID#: 0L/0G SILTY GRAVEL WITH SAND GM/SM BOH @ IL,' LOT 10, BLOCK 6, SCHROEDER EAST SUBDIVISION TROY DAVIS HOMES PROJECT No.: TECHNICIAN: LARRY BETTS SLOPE E SITE PLAN SEE SITE PLAN 2% ~ DEPTH TO DATE READING GROSS TIME NET TIME WATER NET DROF (MINUTES) (MINUTES) (INCHES) (INCHES) TEST HOLE PRESOAKED PRIOR TO TEST[NO: 2/27 1 2:09 1.63" 2 2:39 30 8.13" 6.50" 3 2:40 1.50" 4 3:10 30 8.00" 6.50" 5 3:11 1.50" 6 3:41 '30 8.00" 6.50" ! PERCOLATION RATE: 4.6 (MIN/INCH) PERC. HOLE DIA.10'' (INCHES) TEST RUN BETWEEN: 3.5 FT. and 4.5 FT. COMMENTS: TEST HOLE PRE SOAKED PRIOR TO TEST, TEST PERFORMED BY ANDERSON ENGINEERING. I, MICHAEL E. ANDERSON CERTIFY THAT THIS WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES IN EFFECT ON THIS DATE: 5/10115 ON-SITE WASTEWATER DISPOSAL SYSTEM CONSTRUCTION AND MATERIAL SPECIFICATIONS SUBJECT: LOT 10, BLOCK 6, SCHROEDER SUBDIVISION EAST ADDN. GENERAL: The scope of this project includes furnishing and installing a new 1,250 gallon STEP Tank at the location shown on the Site Plan. Work also includes the construction of 2 new 33' long by 5' wide by 1' effective depth absorption trench also shown on the Site Plan. A 1.25" PVC line must be placed between the lift station and the new absorption trench. The distribution pipe for the trench will be placed at 1.0' below the ground surface. The total depth of the trench will be 2.0'. A minimum of 3' of cover must be placed atop the trench. A minimum of 4' of cover is required over the Septic Tank and Lift Station. All disturbed areas must be revegetated after construction is complete. Construction shall be in accordance with the approved site plan, design drawings, Municipal Permit with any special provisions or conditions, and all applicable State and Municipal Wastewater Disposal Regulations. The Contractor shall be responsible for obtaining all underground utility locates and for the layout of the septic system and verification of the location of all lot lines. Contractor is also responsible to verify the separation distance from the well on this and adjacent lots and from surface water and streams in the area. Unless specifically agreed otherwise, the contractor shall be responsible for final grading areas subsequently depressed from soil settling. Property owner shall be responsible for revegetation of affected areas unless specifically agreed otherwise. Contractors installing wastewater disposal systems must be certified by the Development Services Department Building Safety Division On- Site Water and Wastewater Program for system installations. Owners installing their own systems must receive prior approval from the On- Site Water and Wastewater Program before beginning system installation. SEPTIC TANK/LIFT STATION INSTALLATION 1. The-1,250-gallon STEP Tank must be obtained from a Municipally approved septic tank manufacturer. 2. The septic tank shall be sufficiently bedded to prevent settling or shifting of the tank. Lot 10, Block 6, Schroeder Subdivision East Addn. May 9, 2015 Page 2 of 4 3. All standpipes on the septic tank shall extend a minimum of 12 inches above final grade. 4. Tanks installed without 4' of cover shall have a minimum of 2" of direct burial insulation. A foundation cleanout shall be installed one to four feet from the building foundation. Two cleanouts are required between the tank and the drain field. 6. Final grading over the tank shall be such that a positive slope exists away from the septic tank. DRAIN FIELD CONSTRUCTION: 1. The drain field shall be constructed to the dimensions shown on the design. The bottom of the bed shall be within 2" of level. Distribution piping must be placed level with perforations down atop a level bed of drain field rock. Rock should then be placed over the pipe to provide a minimum of 2" of cover. 3. A silt barrier or geotextile fabric must be placed between the drain field' rock and the natural soil backfill. Monitor tubes must be 4" in diameter and installed at the locations shown on the design. The portion below the distribution line must be perforated. Contractor shall verify the septic tank and drain field are a minimum 100' away from any private water wells in the area, 150' from a Class "C" Well or 200' from any community well. Direct bury insulation must be placed over the distribution system if less than 3' of backfill depth is available. Finish grade over the trench must be mounded to prevent settlement or depressions. 7. Grade area surrounding the absorption trenches to drain away. A minimum 2' of accepting soil is required below the drain field rock for a 5' wide trench. All pockets of unacceptable materials must be removed and replaced. Lot 10, Block 6, Schroeder Subdivision East Addn. May 9, 2015 Page 3 of 4 MATERIAL SPECIFICATIONS: The lift station must be constructed by a municipally approved septic tank manufacturer. An Orenco 20 OSI 05 HHF-5 pump is recommended. 2. The following pipe materials are approved for use in septic system installations in the Municipality of Anchorage: Cast Iron (perforated and solid), ASTM D3034 or P.V.C. (perforated and solid), ASTM F810 or H.D.P.E. (perforated, but not solid) and ASTM D2662 or A.B.S. (perforated and solid). 3. insulation shall be at least 2" thick extruded direct burial polystyrene (Dow Chemical Co. Styrofoam HI or equal). 4. Septic tank inlets and outlets shall be fitted with watertight couplings (Caulder, Fernco, or equal). 5. A permeable geotextile fabric (Typar, Mirafi or equal) must be installed between the final drain rock layer and the native soil layer. 6. All drain rock shall be .5" to 2.5" in diameter with less than 3% passing the #200 sieve. FILTER SAND SPECIFICATION: 1. Material for Filter Sand must be classified as a masonry sand and meet the following gradation: 50% or More Passing the No. 4 Sieve 2% or Less Passing the No. 100 Sieve 1% or Less Passing the No. 200 Sieve INSPECTIONS: Municipal Ordinance requires a minimum of two inspections. These inspections must be conducted under the supervision of a professional engineer registered in the State of Alaska. The first inspection must be conducted after the excavation of trenches, beds or pits and before the installation of any gravel. A septic tank may be set in place, but may not be backfilled. The second inspection must be conducted after the placement of the geotextile fabric, gravel, distribution piping, standpipes, cleanouts and insulation. No backfill should be in place at the time of inspection. Lot 10, Block 6, Schroeder Subdivision East Addn. May 9, 2015 Page 4 of 4 Contractor shall provide a copy of all field survey layout and construction notes for use in preparing the cedified as-built of the completed system.