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HomeMy WebLinkAboutNORTH SLOPE BLK 4 LT 10ANorth Slope Block 4 Lot 1OA #050 - 581 - 22 Permit Number: Tax Code Number: Work Type: On-Site Water & Wastewater System Permit 0SP121228 05058122000 WellSeptic MUNICIPALITY OF ANCHORAGE Development Services Department On-Site Water & Wastewater Program 4700 Elmore Road, PO Box 196650 Anchorage, AK 99519-6650 Telephone: (907) 343-7904 Initial Permit Effective Dates: August 10, 2012 to August 10, 2013 Design Engineer: ANDERSON ENGINEERING Subdivision: NORTH SLOPE Site Legal Address: NORTH SLOPE BLK 4 LT 10A G:0703 Owner/Address: KUESTNER DON & ANITA R 30534 KUPARUK AVE EAGLE RIVER AK 9957797'16 Site Mailing Address: 30650 SAGWON AVE, Eagle River Lot Size in Sq Ft: 75609 Total Bedrooms: 4 This permit is for the construction of: Y Disposal Field Y Septic Tank N Holding Tank N Privy Y 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 (18AAC80). 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 dudng freezing weather must either: A. Open and Close on the same day. B. Covered, sealed, and heated to prevent freezing. Special Provisions: PRIOR TO CONSTRUCTION: Additional percolation tests shall be completed such that the entire drainfield is within 30 feet of a percolation test. Results shall be submitted with the inspection report. Issued By: , Date: Date: MUNICIPALITY OF ANCHORAGE Community Development Department ~.~,?~.~.~ Development Services Division On-Site Water & Wastewater Program Mayor Dan Sullivan ON-SITE SEWER/WELL PERMIT APPLICATION FOR A SINGLE FAMILY DWELLING Parcel I.D. 050-58t-22 Property owner(s): Troy Davis Homes, Inc. Day phone: Mailing address: 165 E. Parks Highway, Wasilla, AK 99654 Site address: 30650 Sagwon Avenue Eagle River, AK 99577 Legal description (Sub'd., Block & Lot): North Slope, Block 4, Lot t0A Legal description (Township, Range & Section) Lot Size: 75,609 S.F. Number of Bedrooms: Three (3) Phone: 907-343-7904 Fax: 907-343-7997 357-9394 THIS APPLICATION IS FOR: ([] all that apply) Absorption Field X Septic Tank X Holding Tank [] Privy [] Private Well X Water Storage [] THIS APPLICATION IS AN: Initial X Upgrade [] Renewal [] THIS APPLICATION INCLUDES A VARIANCE / WAIVER REQUEST FOR: I certify that the above information is correct. I further certify that this application is being made for a Single Family Dwelling and is in accordance with applicable Municipal Codes. (Signature of property owner or authorized agent) Permit/Rush Fees: Date of Payment: Receipt Number: Permit No. ~'~-~ Waiver Fees: Date of Payment: Receipt Number: Waiver No. C:\Users~AndEng\Desktop\Mike\North Slope\Permit Application Lot 10A.docC:\Users~AndEng\Desktop\Mike\Nor/h Slope\Permit Application Lot 10A.doc July 31,2012 Municipality of Anchorage Development Services Department On-Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Subject: Lot 10A, Block 4, North Slope Subdivision Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of Lot 10A, Block 4, North Slope Subdivision intends to construct a new three-bedroom home on the lot. We are therefore requesting a permit be issued for the construction of a new well and septic system to accommodate the home. The attached Site Plan and backup documentation identify the location and configuration of the proposed septic system along with the alternate site. No existing wells or septic systems are closer than 100' from the proposed well or 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 holes placed on the lot in the area of the absorption trench and alternate site indicated silty gravel with sand (GM). The percolation rate of the soil was determined to be between 6 and 15 minutes per inch. No groundwater was found during the placement of the test holes and none was noted during the monitoring period. Bedrock was encountered however at 10' below the surface. An application rate of .8 gallons per day per square foot was used in the design of the absorption system. We are proposing to place a new 1,000-gallon septic tank and 2 - 50' 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 southwest at a grade approximating 20%. The new trench will be constructed parallel with 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 surface Lot 10A, Block 4, North Slope Subdivision July 31, 2012 Page Two 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: 1. 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. 4. 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 LEBEND bff - Monitor Tube FCO - Foundation Clean Out TH - Test Hole CO - Clean Out 2C0 - Double Clean Out NOTE: No Areas of Excessive Slope or Surface Water are Within 100' of Any Par~ of the New Septic System. NOTE: No SeparoBon Distance Conflicts Between the Well and Septic System on This Lot and Adjacent Lots. SITE PLAN SCALE 1' = 50' ~.4C~.o.,v ~'---....~O~TH SLOPELoT IoASUBDIVISION / ALTERNATE SITE: Advantex Treatment System wi~h 25' Long x 5' Wide x 1' EiTect~ve Depth Absorption Trench. 4 DPD/SF Application / / / & / / / / / / / / / / / / / / / 49t:h / / / MICHAEL £. ANDERSON NO, CE-4381 LOT 10A, BLOCK 4, NORTH SLOPE SUBDIVISION DESIGN FACTORS: SYSTEM REQUIREMENTS: Three Bedroom Home 5' Wide Trench System Perc. Rate: 6-15 MinJInch 1,000 Gallon Septic Tank Application Rate: .8 GPD/SF 1' Drainfield Rock 3 Bedrooms * 150 GPD/Bedroo,m. = 450 SF Absorption Area 450 SF/.8 GPD/SF/5 SF (Width) .87 (Red. Factor)= 97.9 LF Trench Length THEREFORE: Construct 2-50' Long x 5' Wide x 1' Effective Depth Absorption Trenches. Flow Line Elevation in Trench to be 1' Below Original Ground Surface. Total Depth to be 2' Below Existing Ground. Provide 3' Cover Over Absorption Trench and 4' Cover Over Septic Tank. Place Flow Splitter Valve to Insure Even Flow to Each Trench. ~- -- Geotextile Fabric 4" Perforated PVC (Holes Down) Drainfield Rock TYPICAL 5' WIDE TRENCH SECTION -- NOTE: Grade Area Over Trench to Drain Away. Minimum 6' Separation From Bedrock. ¢.,,,~....~....~..~...~..,~ Minimum 4' Separation From Groundwater Minimum 100 Separation From Private Wells In the Area. Minimum 100' Separation From SuCace Water or Streams:~.~% &700 MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT BRAGAW STREET ANCHORAGE, AK 99519-6650 DEPTH (feet) 1 2 3 4-- 5 6-- 7-- 8 9-- 20- 1 SOILS LOG - PERCOLATION TEST J LEGAL DESCRIPTION: LOT 10A, BLOCK /4, NORTH SLOPE SUB. NO. I PERFORMED FOR: TROY DAVIS HOMES DATE: 7 / 9 / 2 012 PROJECT No.: PARCEL ID#: TECHNICIAN: JKB Silty Gravel w/Sand Bedrock @8' WAS GROUND WATER ENCOUNTERED9 ___ IF x/ES ~ WHAT DEPTH?___ DEPTH OF WATER AFTER MONITORING: DATE OF MONITORING: SLOPE No None 7/28/12 SITE PLAN 2_% __ DEPTH TO DATE READING GROSS TINE NET TINE WATER NET DROP (MINUTES) (MINUTES) (INCHES) (INCHES) TEST HOLE PRESOAKED PRIOR TO TESTING: 7/18 1 1:27 4.75" 2 1:57 30 7.75" 3.00" 3 1:58 4.00" 4 2:28 30 6.75" 2.75" 5 2:29 3.50" 6 2:59 30 6.25" 2.75" PERCOLATION RATE: 11 (MIN/INCH) PERC. HOLE DIA. (INCHES) TEST RUN BETWEEN: 4 FT. and 5 FT. COMMENTS: TEST HOLE PRE SOAKED PRIOR TO TEST. TEST PERFORMED BY ANDERSON ENGINEERING. 1, MICHAEL E. ANDERSON CERTIFY THAT THIS WAS PERFORMED 1N ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES 1N EFFECT ON THIS DATE:. 7/28/12 4700 DEPTH (feet) 1 2-- 3 4-- 5 6 7-- 8 9 20 MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT BRAGAW STREET ANCHORAGE, AK c)9519-0650 SOILS LOG - PERCOLATION TEST LEGAL DESCRIPTION: LOT 10A, BLOCK 6, NORTH SLOPE SUB. NO. PERFORMED FOR: TR0¥ DAVIS HOMES DATE: 7/9/2012 PROJECT No.: PARCEL ID#: TECHNICIAN: [ TEST HOLE 2 SLOPE Silty Gravel w/Sand Bedrock SITE PLAN WAS GROUND WATER ENCOUNTERED? No IF YES @ XYHAT DEPTH?.__ DEPTH OF WATER AFTER MONITORING: 7' DATE OF MONITORING 8/9/l 2 DEPTH TO DATE READING GROSS TIME NET TIME WATER NET DROP (MINUTES) (MINUTES) (INCHES) (INCHES) TEST HOLE PRESOAKED PRIOR TO TESTING: 7/18 1 1:37 5.00" 2 2:07 30 10.25" 5.25" 3 2:08 5.00" 4 2:38 30 9.50" 4.50" 5 2:39 4.00" 6 3:09 30 8.50" 4.50" PERCOLATION RATE: 6.7 .(MIN/INCH) PERC. HOLE DIA. 8 (INCHES) TEST RUN BETWEEN: 4 FT. and 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:. 7/28/12 ON-SITE WASTEWATER DISPOSAL SYSTEM CONSTRUCTION AND MATERIAL SPECIFICATIONS SUBJECT: LOT 10A, BLOCK 4, NORTH SLOPE SUBDIVISION GENERAL: The scope of this project includes the procurement and placement of a new 1,000-gallon septic tank at the location shown on the Site Plan. Work also includes the construction of 2 new 50' long X 5' wide X 1' effective depth absorption trenches at the location also shown on the Site Plan. The distribution line in the trench will be placed at 1' below the existing ground surface. Total depth of the trench will be 2' below the existing ground surface. The new absorption trench and septic tank must be placed a minimum of 100' from all private wells and any surface water in the area and 10' from the water service line on the lot. A minimum of 3' of cover is required over the absorption trench and 4' of cover over the septic tank. A cleanout must be placed every 50' minimum between the septic tank and the absorption trench. 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. The Contractor must also verify the location of wells in the area and assure that the separation distances are met. 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 Municipal 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 INSTALLATION 1. A new 1,000-gallon septic tank must be procured from an approved source and installed at the location shown. The cover over the tank shall not exceed 4' unless approved by the tank manufacturer. Lot 10A, Block 4, North Slope Subdivision July 31, 2012 Page 2 of 3 - 2. A septic tank is to be constructed by a certified septic tank manufacturer. Construction shall include two 4" cleanouts for pumping access. 3. The septic tank shall be sufficiently bedded to prevent settling or shifting of the tank. 4. All standpipes on the septic tank shall extend a minimum of 12 inches above final grade. 5. Tanks installed without 4' of cover shall have a minimum of 2" of direct burial insulation. 6. A foundation cleanout shall be installed one to four feet from the building foundation. Two cleanouts are required between the tank and the drainfield. 7. Final grading over the tank shall be such that a positive slope exists away from the septic tank. DRAINFIELD CONSTRUCTION: 1. The drainfield shall be constructed to the dimensions shown on the design. The bottom of the trench shall be within 2" of level. Distribution piping must be placed level with perforations down atop a level bed of drainfield rock. Rock should then be placed over the pipe to provide a minimum of 2" of cover. 3. A silt barder or geotextile fabric must be placed between the drainfield rock and the natural soil backfill. 4. 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 drainfield 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 trench to drain away. A minimum 2' of accepting soil is required below the drainfield rock for a 5' wide trench. Contractor shall verify this condition prior to placement of the rock. All pockets of unacceptable materials must be removed and replaced. Lot 10A, Block 4, North Slope Subdivision July 31, 20t2 Page 3 of 3 MATERIAL SPECIFICATIONS: 1. Septic tanks must be constructed by a municipally approved septic tank manufacturer. 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. 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. Contractor shall provide a copy of all field survey layout and construction notes for use in preparing the certified as-built of the completed system.