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HomeMy WebLinkAboutKASILOF HILLS BLK 7 LT 21KO.¸ ilof Hill Block 7 21 #015-132- 25 Permit Number: OSP121059 Tax Code Number: 01513226000 Work Type: WellSeptic Permit Effective Dates: April 25, 2012 On-Site Water & Wastewater System Permit 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 to April 25, 2013 Dep}wtment Design Engineer: ANDERSON ENGINEERING Subdivision: KASILOF HILLS Site LegalAddress: KASILOF HILLS BLK 7 LT 21 G:2541 Owner/Address: GARDNER LESLIE D 50% & REDFIELD KLISTA M 50% PMB 177 PO BOX 219 DUVALL WA 980190219 Lot Size in Sq Ft: 47281 Total Bedrooms: 4 Site Mailing Address: 10041 STROGANOF DR, Anchorage This permit is for the construction of: Y Disposal Field Y Septic Tank N Holding Tank N Pdvy 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. 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 SEWERNVELL PERMIT APPLICATION FOR A SINGLE FAMILY DWELLING Parcel I.D. 015-t32-26 Property owner(s): Crown Pointe, Inc. Day phone: 229-1886 Mailing address: P,O, Box 112313 Anchorage, AK 99511 Site address: Kasilof Blvd. at Stroganof Drive Anchorage, AK 99516 Legal description (Sub'd., Block & Lot): Kasilof Hills, Block 7, Lot 21 Legal description (Township, Range & Section) Lot Size: 47,28t Sq. Ft. Number of Bedrooms: Four (4) 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\Kasilof Hills\Permit Application Lot 21 .docC:\Users~AndEng\Desktop\Mike\Kasilof Hills\Permit Application Lot 21 .doc ANDERSON ENGINEERING P~Oi BOX 240773 ANCHORAGE, AK 99524 522,7773 677:7766 (FAX) April 19, 2012 Municipality of Anchorage Development Services Department On-Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Subject: Lot 21, Block 7, Kasilof Hills Subdivision Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of Lot 21, Block 7, Kasilof Hills 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 septic system and well or septic systems and wells 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 holes placed on the lot in the area of the absorption trench and alternate site indicate silty sand and gravel (SM/GM). The percolation rate of the soil was determined to be from 3 to 30 minutes per inch. No groundwater was found during the placement of the test holes and none was noted during the monitoring period. An application rate of .8 gallons per day per square foot was used in the design of the absorption system as a blended rate. The new trench and alternate site are to be constructed almost entirely in TH No. 1 which indicated a rate of 3 minutes per inch. We are proposing to place a new 1,250-gallon septic tank and a 63' long by 3' wide by 6' effective depth absorption trench 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 9'. 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 septic system slopes to west at a grade of 20%. The new trench will be constructed parallel with the slope as much as possible Lot 21, Block 7, Kasilof Hills Subdivision April 19, 2012 Page Two 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. A~achmen~ 8 /' ~3 18 21 7 Well 21 10 19 ,/ Existing Well 9 Existing Well 7 PLAT NO. 66-96 KASILOF HILLS SUBDIVISION LOT 2~1, BLOCK 7 47,28~ S.F. Proposed Well Four Bodroom Home G. SLAB EL. = 488' ~[:D 30 1 250 Gallon 47' Long x 3' Wide x B' Effective Depth o ~ ~ <~ Site LEGEND MT - Monitor Tube FC0 - Foundation CleonI~ut , TH - Test Hole ' ExistingWell <'~o NOTE: ,oo, o, Any Port of the SITE PLAN New Septic System. SCALE 1' = 50' LOT 21, BLOCK 7, KASILOF HILLS SUBDIVISION DESIGN FACTORS: SYSTEM REQUIREMENTS: Four Bedroom House Deep Trench System Pero. Rate: 6-15 Min./Inch 1,250 Gallon Septic Tank Application Rate: .8 GPD/SF 8' Drainfield Rock 4 Bedrooms X 150 GPD/.8 GPD/SF (Application Rate) = 750 SF Absorption Area 750 SF/16 SF/LF = 46.875 LF Trench Length THEREFORE: Construct a New 47' Long x 3' Wide x 8' Effective Depth Absorption Trench. Flow Line Elevation in Trench to be 3' Below Original Ground Surface. Total Depth to be 11' Below Existing Ground. Place 2" of Insulation and 2' of Cover Over Absorption Trench or Provide 3' of Cover Over Trench. Place 4' of Cover Over Septic Tank. Natural Backfill Geotextile Fabric 4" Perforated PVC (Holes Down) -- Drainfield Rock 3~ TYPICAL DEEP TRENCH SECTION NOTE' Grade Area Over Trench to Drain Away. ~ Mimmum 6. Separation From Bedrock. ~.,,~.;~,,;~....:~..~ Minimum 4 Separation From Groundwater. Minimum 100' Separation From Wells in the Area. ~.~\ MICHAEL E ANDERSON Minimum 100' Separation From Surface Water or Streams. '.;~¢~}.. MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT &700 SOUTH BRAGAW STREET ANCHORAGE, AK 99519-6650 SOILS LOG - PERCOLATION TEST ] DEPTH (feet) 1 2 3 4 5 6 7 8 9 LEGAL DESCRIPTION: PERFORMED FOR: DATE: 6/6/2012 PARCEL ID#: LOT 21, BLOCK 7, KASILOF HILLS SUBDIVISION CROWN POINTE HOMES PROJECT No.: TECHNICIAN: [ TE T.OLE # 3 I OL/OG SILTY SAND WITH GRAVEL GM/SM BOH J. BERKRAM WAS GROUND WATER EN COUNTEP,~D? SLOPE NO NONE DATE OF MONITORING: 6/7/06 - .................................-ff..-djj -....~.~ SiTE PLAN SEE SITE PLAN DEPTH To DATE READING GROSS TiME NET TIME WATER NET DROP (MINUTES) (MINUTES) (INCHES) (INCHES) 6/6/12 TEST HOLE PRESOAKED PRIOR TO TESTING: I Eft3 1.25" 2 2:&3 30 7.75" 6.50" 3 2:44 1.58" 4 3:lA 30 7.63" 6.25" 5 3:15 1.25" 6 3:45 30 7.50" 6.25" PERCOLATION RATE:A.8 .0MIN/INCH)PERC. HOLEDIA. 8 _(INCHES) TESTRUN BETWEEN:./+,0 FT. and. 5.0 FT. COMMENTS: TEST HOLE PRE SOAKED PRIOR TO TEST. TEST PERFORMED BY ANDERSON ENGINEERING TECHNICIANS. I, MICHAEL E. ANDERSON CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES IN EFFECT ON THIS DATE: 6/6/12 --~i~ --*~. · . · ~ ... ~ 4 ~i"'9,' ............ J~OIL LO(; - F£RQ,OLATION T[STI LEGAL DE~JCRIPlqON: .,.-SOIL CLAS$1Fi~A'TIONS ',,L GW ~ OR6 -... ..... ~' ,,, ~t GP ML 6C ! OL x~, ,, _GROUNDWATER,, } l/ t I H/CZ/.~"'/ ,./ . JIUI,~i~Jj (CAR SIZE) j DRY 2/e/2005 -~'"';~ ~ l ~itlt, ft S~D[ or tH, / 1 "' \ ' ..... '"" ' ':' Th'4e (MIN,,UTF.$ EAD~N6 , ,(INCHES) 12 ~/200~ 1 $:00 - ~ 4-.-~.~ ,~, 3:20 .- $- I 9 .s:4o ~ - 11 3:~0 8" ; _ 18-~ J g,, 12 .... ,,oo ,lO J ..... ~':"' ' ' 19J ] PERCOLATION F~TE ,3.a ..(MIN./INCH) PER(:. IIOL-~ OlA. 6 · ONCHE$ IJ J '1 EST RUN 8E [W~:EN. _ 4,0 ::F-. AND :~0 FT. 20 ..... A F'-Ol.J~ ~0L~ PRE$O,,~ WAS P~"F~FO~H[D: II y~$ [] SOILS LOGGED BY~ , JQDY iCAUS F'L:RCOLA'TION TEST PERFOB~ED BY: ROB COHMENTS: , , PERFORMED BY OEG, Ltd. I. JEYFREY A, GARNE$$, CERTIFY THAT THiS WAS ~PEI~FQRblED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL 8UIDELINE$ IN EFFECT ON THIS DATE: ~-¢'~Jj'e.6~ DEP.TH TO GROUNDWATER DATE j~-OII. L, OG -,PERCOLATION TEST~ ~l[._.~j.~.~ ........ PERF F : LES ¢a~ . [-? ,3 ,.' -~ ~TEST HOLE #21 °'°"~ GW GP GM GC SW DEPTH TO ' ROUNDWATER DRY __ DRY DATE JREADIN( 1..l t PEF~COLATION RATE ORG ML CL OL MM OH l CLOCK NET TIME TI~tE (MINUTES 4:0~, - ,,. 4~35 30 30 (MIN./INCH) WATER L'E. vEL NET DROP RF_.~,D J~g, (INCHES) PERC, HOL ~ D;A. ~NCHES) TEST RL,LN B~TWEEN 4.,$ Fr. AND ..... ,5.0 .r:T. A FOUR HOUR PF~SOAI~ WAS PER,~ORM~D: I YF$ ~ NO: SOILS LOGGED IB¥;, dODY N~AU~ ..... PERCOL~,TIQN TESF PERFORMED BY: RC~l ~PB£LL . COMMENTS; ., PERFORM~'D ~Y ~£G, Ltd, {, JEFFREY A, GARN~S, CERTIFY THAT THIS WAS PERFORMED ~N ACCORDANCE WITH ALL STATE AND MUNiCiPAL GUIDELINES tN EFFECT ON THIS DATe: _ ON-SITE WASTEWATER DISPOSAL SYSTEM CONSTRUCTION AND MATERIAL SPECIFICATIONS SUBJECT: LOT 21, BLOCK 7, KASlLOF HILLS 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 a new 63' long X 3' wide X 6' effective depth absorption trench at the location also shown on the Site Plan. The distribution line in the trench will be placed at 3' below the existing ground surface. Total depth of the trench will be 9' 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 proposed for the lot. A minimum of 3' of cover is required over the absorption trench and 4' of cover over the septic tank. 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 TANK INSTALLATION 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 21, Block 7, Kasilof Hills April 19, 2012 Page 2 of 3 DRAINFIELD CONSTRUCTION: 1. The septic tank shall be sufficiently bedded to prevent settling or shifting of the tank. All standpipes on the septic tank shall extend a minimum of 12 inches above final grade. 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 drainfield. Final grading over the tank shall be such that a 3ositive slope exists away from the septic tank. 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. A silt barrier or geotextile fabric must be placed between the drainfield 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 ground 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. 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 21, Block 7, Kasilof Hills April 19, 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.