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HomeMy WebLinkAboutCROSS VIEW ESTATES BLK 1 LT 16Cross View Estates Block Lot #015-301-64 MUNICIPALITY OF ANCHORAGE Community Development Department Development Services Division On-Site Water & Wastewater Program Mayor Dan Sullivan Phone: 907-343-7904 Fax: 907-343~7997 ON-SITE SEWER/WELL PERMIT APPLICATION FOR A SINGLE FAMILY DWELLING Parcel I.D. 015-301-64 Property owner(s): H2L Investments Day phone: 229-t886 Mailing address: 633 East 8tst Avenue Anchorage, AK 99516 Site address: Heritage Heights Drive Anchorage, AK 99518 Legal description (Sub'd., Block & Lot): Cross View Estates, Block 1, Lot 16 Legal description (Township, Range & Section) Lot Size: 54,149 Sq. Ft. Number of Bedrooms: Four (4) THIS APPLICATION IS FOR: ([~ all that apply) Absorption Field X Septic Tank X Holding Tank [] Privy [] Private Weld 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\Cross View Estates~Permit Application Lot 16.docC:tUsers~AndEng\Desktop~Mike\Cross View Estates~Permit Applica[ion Lot 16.doc April 21, 2012 Municipality of Anchorage Development Services Department On-Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Subject: Lot 16, Block 1, Cross View Estates Subdivision Septic SyStem Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of Lot 16, Block 1, Cross View Estates Subdivision intends to construct a new four-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 well and septic system along with the alternate site. Also identified on the plans are the existing wells and septic systems on surrounding lots. No conflicts exist between the proposed well and septic system and wells or septic systems on adjacent lots. 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 was placed on the lot in the area of the absorption trench and alternate site during the subdivision phase, The log indicates silty sand to silt (SM/ML). The percolation rate of the soil was determined to be 60 minutes per inch. No groundwater was found during the placement of the test hole and none was noted during the monitoring period. An application rate of .45 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 septic tank and 2 new 45' long by 3' wide by 8' 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 3' below the surface and the total depth will be 11'. 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. A flow splitter valve will be placed to insure even flow to each trench. Additional test holes will be placed on the lot prior to construction to verify soil conditions. If soil conditions are not consistent will cease immediately and a revised design submitted for review and approval. The ground surface on the lot in the area of the septic system slopes to the northeast. The new trenches will be constructed parallel with the contours of the slope as much as Lot 16, Block 1, Cross Point Estates Subdivision April 21, 2012 Page Two possible in conformance with Municipal requirements. The new septic system will be constructed a minimum of 100' from all wells and any surface water and 10' the proposed and existing water services in the area. If the system is constructed in accordance with our design the following statements apply: 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. 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. 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 / / o x, / / (feet) l~~---: ORGANICS tTH#16/PTS#535I ~ GW ~ ORG ~ GP ~iML GC OL o cc SW MH · ,,,sP CH SEE ATTACHED ~SM OH sc SITE PLAN iilIII I DEPTH TO DATE GROUNDWATER ! DRY 9/1/2005 i DRY 9/19/2005 10 SM/ML 11 - ' ' D~- READING CLOCK NET TIME WATER LEVEL NET DROP TIME (IvlINUTES) READING (INCHES) 12 9/8/05 1 2:05 - 6" - 2 2:35 50 5 1/2" 1/2" 13 3 2:35 - 6- - 4 3:05 30 5 1/2" 1/2" 14 5 5:05 - 6- - 6 3:35 30 5 1/2" 1/2" 15 16 17 1B~ PERCOLATION RATE *60 (MIN./INCH) PERC. HOLE DIA. 6 (INCHES) 19 TEST RUN BETWEEN 4 FT. AND 5 FT. 20 A FOUR HOUR PRESOAK WAS PERFORMED: [] YES [] NO SOILS LOGGED BY: JODY MAUS PERCOLATION TEST PERFORMED BY: CALEB GALL COMMENTS: * MAY REQUIRE THE USE OF ADVANCED WASTEWATER TREATMENT SYSTEM PERFORMED BY GEG, Ltd. I, JEFFREY A, GARNESS, CERTIFY THAT THIS WAS PERFORMED IN ACCORDANCE 'WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE: ~'(~l/,:~J./~'J)~- DEPTH TO DATE GROUNDWATER DRY 9/1/2005 DRY 9/19/2005 ON-SITE WASTEWATER DISPOSAL SYSTEM CONSTRUCTION AND MATERIAL SPECIFICATIONS SUBJECT: LOT 16, BLOCK 1, CROSS VIEW ESTATES SUBDIVISION GENERAL: The scope of this project includes the procurement and placement of a new 1,250-gallon septic tank at the location shown on the Site Plan. Work also includes the construction of 2 new 45' long X 3' wide X 8' effective depth absorption trenches at the location also shown on the Site Plan. The distribution line in the trenches will be placed at 3' below the existing ground surface. Total depth of the trenches will be 11' below the existing ground surface. The new absorption trenches 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 proposed for the lot. A minimum of 3' of cover is required over the absorption trenches and 4' of cover over the septic tank. A flow splitter valve must be placed to insure even flow to each 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 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 TANKINSTALLATION 1. A new 1,250-gallon septic tank must be procured from an approved source and installed at the location shown. 2. A septic tank is to be constructed by a certified septic tank manufacturer. Construction shall include two 4" cleanouts for pumping access. Lot 16, Block 1, Cross View Estates April 21, 2012 Page 2 of 3 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 barrier 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. All pockets of unacceptable materials must be removed and replaced. Lot 16, Block 1, Cross View Estates April 21, 2012 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.