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HomeMy WebLinkAboutDOUBLE G LT 85BDouble G Lot 85B #051-091-51 Municipality of Anchorage Page I of 3 DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P.O. Box 196650 · Ai'iChorage, Alaska 99519-6650 · Telephone: 343-4744 On-Site Wastewater Disposal System and/or Well Inspection Report Permit Number: SW990318 PID Number: 051-091-51 Name: SDinell Homes Wastewater System: ~New [] Upgrade Address:9510 Vanguard Dr. Anch., AK ABSORPTION FIELD I No. of Bedrooms; Phone: 344-- 5678 FoUr ~ Deep Trench [] Shallow Trench [] Bed i'q Mound [] Other Total Depth from original grade: LEGAL DESCRIPTION so~, Rating: o '75 GPD/Sq. Ft. 1 1 ' Lot: 85B Block: Doub lS~bd~sion: Depth to pipe bottom from original grade: G ravel depth~neat h pipe 3' Ft. Ft Township: I Range: I Section: Fill added above original grade: Gravel length: 2 ' Ft. 5 0 ' Ft. WELL: m New [] Upgrade Gravelwldth: 3 ! Number of lines: ID~stanceb¢weenlines: Classification (Private, A,B.C): Total Depth: Cased TO: Total absorption area: Pipe material: Private 141 Ft. 141 Ft. 800 SO. Ft. ~STM D3034 PVC  Date installed: Driller: Date Drilled: StaticWaterLeve[; installer. 9/8/99-9/1 2/99 Sullivan Water Well 9/30/9!L 90 Ft. Spinetl Homes SEPARATION DISTANCES ~1~ Septic [] Holding [] S.T.E.P. From Tank Reid 'Station Tank SewerL~nesAnchor~c~e Thnk 1 , 250 Well' >100 ' >100 ' N/A N/A 7>=~q,, Matedal~teel NumberofCompartments: TWO Surface 100' >100' N/A N/A N/A LIFT STATION - N/A Lot 5 ' >10 ' N/A N/A ! N/A - Size in gallons: IManufacture~- Line I N/A N/A N/A "Pump on' level at: I "Pump off' leve, at: IHig" water alarm at: Foundation None Noted on Lo' PumpMake&Model IElectricallnspectionsperforrnedby: Curtain Drain I BENCH MARK' Remarks: ., LoCation and Descfiption: Back Deck;¢,iEast End Assumed Elevation:~ 0 0 . 0 ~=~, Inspecti0ns performed by: Reviewed and approved by: ~~ ~ Date:/- 72-313 (Rev, 9/91) MOA25 Septic/holding tank on lot Absorption field on lot Public sewer main D. LIFT STATION None on Lot Date installed Manhole/Access (Y/N) High water alarm level at* Cycles tested E. SEPARATION DISTANCES SEPARATION DISTANCES FROM WELL ON LOT TO: 7100' >100' N/A Size n ga Ions "Pump on" level at* *Datum "Pump off" level at* On adjacent lots ¥1 00 ' >100' On adjacent lots Public sewer manhole/cleanout N/A >25' Sewer/septic service line Lift station N/A SEPARATION DISTANCES FROM SEPTIC/HOLDING TANK ON LOTTO: Foundation '¥5 ' Property line > 5 ' Absorption field > 5 ' Water main/service line >lr)' Surfacewater/drainage ,~00~!: Wells on adjacent lots >100 SEPARATION DISTANCE FROM ABSORPTION FIELD ON LOTTO: Property line > 1 0 ' Building foundation > 1 0 ' Water main/service line > 1 D Surface water >1 00 ' Driveway, parking/vehicle storage area >25 ' Wells on adjacent lots > 1 ~ 0 ' Curtain drain None Noted on Lot F. ENGINEER'S CERTIFICATION I certify that I have determined t in conformance with MOA HAA gu~ on this date. Signature ~ Engineer's Name Michael E. Anderson.,: P.E. Date 1 /24/00 HAA Fee $ ~ Date of Payment Receipt Number Waiver Fee $ Date of Payment Receipt Number 72-026 (Rev. 3/96)* 5. STATEMENT OF INSPECTION BY ENGINEER As certified by my seal affixed hereto and as of the validation date shown below, I verify that my investigation of this Health Authority Approval application shows that the on-site water supply and/or wastewater disposal system is safe, functional and adequate for the number of bedrooms and type of structure indicated herein. I further verify that based on the information obtained from the Municipality of Anchorage flies and from my investigation and inspection, the on-site water supply and/or wastewater disposal system is in compliance with all Municipal and State codes, ordinances, and regulations in effect on the date of this inspection. Name of Firm Anderson Engineering Phone 522-7773 Address P.O. Box 240773 Anchoraqe, AK 99524 Engineer's signature '/~-~=~* ~- ~ Date 1/24/o0 DHHS SIGNATURE ~ Approved for ¢ Disapproved. Conditional approval for bedrooms. bedrooms, with the following stipulations: Additional comments By: Date /- 2-.~--- O0 The Municipality of Anchorage Department of Health and Human Services (DHHS) issues Health Authority Approval Certificates based only upon the representations given in paragraph 5 above by an independent professional engineer ragisterad in the State of Alaska. The DHHS does this as a courtesyto purchasers of homes and their lending institutions in order to satisfy certain federal and state requirements. Employees of DHHS do not conduct inspections or analyze data before a certificate is issued. The Municipality of Anchorage is not responsible for errors or omissions in the professional engineer's work. ,/ LOT 85B / / TH1 / TH3. S2J23.8 45.:0 C3J30.0 49'.3 C4~39.5 71.6 q5145.'4 40.8 N 89°59'33.E ,145.00' Lot 85, Double G Subdivision Permit No. SW990318 PID No. 051-091-51 Page 2 of 3 1 ."=30' ILT SCALE 1" = 30' Municipality of Anchorage Page 3 of 3 DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P.O. Box 196650 - Anchorage, AK 99519-6650 343-4744 On-Site Wastewater Disposal System or Well Inspection Report Permit Number SW990318 PID No. 051~091-51 89.8 15.7' ~ Tee / ~ep Tank ! 89~.6 ~ 94.2 Geotextile. Fabric 9.5 Drainfield Rock 75.0 ~ 81, .3 I,,,' I I I 50' ! PROFILE AS-BUILT HORIZONTAL SCALE 1" 10' : NO VERTICAL SCALE 89,5 SULLI VAN ·WATER: WELLS.. P.O. BOX 670272, CHUGtAK, ALASKA'99567.e TELE~"HQNE 688-2759 ..... -: DEPTH. ' Lin~rTy~: · , . . ..... f~et Pumping level: f~t after: ... hrs. pumping . ~pm. · Rearer Ra~e: ~ gpm Depth: from ~ feet, to feet .. Pump Intake Depth: ' f~et Pdmp Size hp Brand Name ' ' Well Disinfe~ed Upon Comple~on? ."~s ~ No commen~: . Ddllefs Name ' ATTENTION: It is the responsibil~ of the property owner to subm tla copy of the well tog:to the proper authority, Municipality of Anchorage; Department of-Health & Human Services and/or Department of Environmental'Conservation_ MatSu Borough: Department of Environmental Conservation, ' ~ece ved Time Jan.24 8:20AM .:.. MUNICIPALITY OF ANCHORAGE Department of Health and Human Services On-Site Services Program 825 L Street, Room 502 P.O. Box 196650, Anchorage, AK 99519-6650 (9O7) 343-4744 ON-SITE WASTEWATER DISPOSAL SYSTEM /WATER SUPPLY PERMIT Initial Date Issued: Sep 07, 1999 Expiration Date: Sep 06, 2000 Permit Number: SW990318 Legal Description: DOUBLE G LT 85B Design Engineer: 0014 Anderson Engineering Owner Name: Spinell Homes Owner Address: 9510 Vanguard Drive Anchorage, AK 99507- Parcel ID: 051-091-51 Site Address: 021237 MC KINLEY AVE Lot Size: 43570 SQ. FT. Total Bedrooms: 4 Permit Bedrooms: 4 This permit is for the construction of: [] Disposal Field [] SepticTank [] Holding Tank [] Privy [] Private Well [] 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 engineer must notify DHHS at least 2 hours prior to each inspection. Provide notification by calling (907) 343-4744 ( 24 hours ). ( Not required for a Water Supply Permit only ). 4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather must be either: A. Open and closed on the same day. et -/'7 - ?? B. Covered, sealed, and heated to prevent freezing. MEMORANDUM DATE: TO: FROM: SUBJECT: September 16, 1999 Dan Roth Mike Anderson, P.E..~'.~¢c~.~ Lot 85B, Double G Subdivision Permit No. SW990318 Revised Well Location SEP 17 999 Municipality ot A ~c~orage Dept. Health & Human Serv oes The builder of Lot 85B, Double G Subdivision, Spinell Homes, has requested the well location be revised to the west side of the lot. The new location is more accessible and will prevent the removal and demolition of several trees at the original location. The attached Site Plan shows the new location along with the 100' protective radius. A new testhole has been placed and labeled on the plan as TH3. The log and percolation test will be submitted with the as-built for the system. The system is currently in place. The house has yet to be built and the well has not been drilled. We hereby request the location of the well be revised as shown on the attached plan. Thank you for your time and consideration with this request. Attachment Copy: Spinell Homes Attention: Guy SITE PLAN · soAL----'-~ ~ 7 ;;:o' LOT 85B TH3 ~ ' 50" Lonq X 3' Wide X. 8" Effective Depth AbsOrption Trench 250 Gal~0n ;eptic Tank 15' utility 20' B~M ~our~,Bedroom HQme A.C. 0RN[ Easem~ Easen ~nt August27,1999 Municipality of Anchorage Department of Health and Human Sei-vices 825 "L" Street Anchorage. AK 99502-0650 Subject: Lot 85B, Double G Subdivision Septic System Design Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owners of Lot 85B, Double G Subdivision intend to construct a four bedroom home on the lot at the location shown on the attached Site Plan. The attached documentation details the type and size of the septic system. It a~so shows the location of the well proposed for the lot and provides a 100' separation distance radius. We are hereby requesting a permit to construct a well and septic system on the lot. Testholes placed on the lot revealed poorly graded gravels underlain by silty gravel. Percolation tests performed indicate a rate of less than 1 minute per inch in the poorly graded gravel and 26 to 30 minutes per inch in the silty gravel. Groundwater was not encountered during placement of the testholes nor was any noted during the monitoring period. We have therefore designed a deep trench system for the lot The primary trench will be placed in both the GP and GM layers. A minimum of 2' in the GP and 6' 'n the GM layer. The average absorption rate with this combination is .75 gallons per day per square foot. The system is desic~ned on this rate. The replacement site is entirely in the GM layer and designed for an absorption rate of .6 gallons per day per square foot. It is, therefore, 50' long with a 10' effective depth. The grounG surface on the lot slopes from south to north at between 6% and 7%. Toward the north end of the lot the surface slopes dramatically to the north. At the ground surface the absorption trench will be a m~nimum of 40' from the bluff edge. Extending down at a 4:1 slope from the top of the trench we wil not encroach in the slope at a distance less than 50'. If the system s 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. 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. hot 85B, Double G Subdivision August 27, 1999 Page Two The system, if= constructed as designed, will have r~o adverse impact on reserved 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 64,4 648 DOU~ E- ~ 'T~i~' ..oJ~c~' 7 t 92A 9/ AREA MAP SCALE 1" = 100' LOT 85B 50' Lonq X 3' Wide X 8' Ef[ective Dppth Abs6rption Trencn '250 Gallon eptic Tank ~our~Bedroom Home Alternate A.C. DRIVE SITE PLAN[- SCALE 1" = 30' 15' utility 20' B~M Proposed · Easement Easement LOT 85B, DOUBLE G SUBDIVISION DESIGN FACTORS: SYSTEM REQUIREMENTS: Four Bedroom System Perc. Rate: Lt I and 26 Min./Inch Application Rate: .75 GPD/SF Deep Trench System 1,250 Gal. Septic Tank 8' Drainfield Rock 4 Bedrooms X 150 GPD / .75 GPD/SF = 800 SF of Absorption Area 800 SF/16 SF/ LF of Trench = 50 LF Trnch Length Therefore: Construct a Deep Absorption Trench System With One Lateral 50' in Length with 8' of Drainfield Rock Beneath the Lateral. Distribution Pipe in Trench Placed at 2.5' Below the Original Ground Surface. Total Depth to be 10.5' From Original Ground Surface. Mound Over Trench to Provide 3' of Cover. A Minimum of 2' of the Trench Must Be in the GP Layer. NOTE: 8I Natural, Backfill Geot~tile Fabric, 4"'Perforated PVC (Slots Down) Drainfield Rock TYPICAL DEEP TRENCH SECTION (NO SCALE) Grade Area Over Trench to Drain Away. Minimum 4' From Groundwater, Maintain 10' Separation From Lot Line. LOT 85B, DOUBLE G SUBDIVISION (ALTERNATE SITE) DESIGN FACTORS: SYSTEM REQUIREMENTS: Four Bedroom System Perc. Rate: 30 Min./inch Application Rate: .6 GPD/SF Deep Trench System 1,250 Gal. Septic Tank 10' Drainfield Rock 4 Bedrooms X 150 GPD / .6 GPD/SF = 1,000 SF of Absorption Area 1,000 SF/20 SF/ LF of Trench = 50 LF Trnch Length Therefore: Construct a Deep Absorption Trench System With One Lateral 50' in Length with 10' of Drainfield Rock Beneath the Lateral. Distribution Pipe in Trench Placed at 2.5' Below the Original Ground Surface. Total Depth to be 12.5' From Original Ground Surface. Mound Over Trench to Provide 3' of Cover. 10, Natural. Backfill Geotextile Fabric 4" Perforated PVC (Slots Down) Drainfield Rock NOTE: 3' I I TYPICAL DEEP TRENCH SECTION (NO SCALE) Grade Area Over Trench to Drain Away. Minimum 4' From Groundwater.. Maintain 10' Separation From Lot Line. Muni~pelit7 of Ancho~9~ DEPARTMENT OF H=-ALTH & HUMAN ~2~ "L' StreeL Anchorage. ;d~ska 9~502-0E50 SOILS LOG -- PERCOLA~ON Spinell Homes Lot 85B, Double G Subdivision 1 2 4 TESTHOLE NOo 1 SLOPE I~ltl illg I1!1 I I No PLAN I I I t I S~e ~it~ ~lah I I '1 t I I I 'L 11 13 14 15 16 17- 18- 19 20 COMMEN'~., ~o"rro,,,% OF p~RCOLATION R~T= . I J I ~o Perc. Cavity presoaked prior to testing. I I I -GP Layer percolates Less TE - M~.,.~ ~ -- _an, 1 __= ..... ~er~,~uL. ,M, ichael E. Anderson ~/~/g~, ~uni~paii~, of AnchomD~ D=_PARTMENT OF M=-ALTM & HUMAN S-~V~O--$ SO~LS LOG ~ P~RCOLA~ON TSST .Spinell Homes Lot 85B, Doubl~ G subdiyision SLO?c 4 5 8 C:OMMSNT~ il Illk i I I1'1 ,F Y~. AT W~*~ N/A I J S~e ~itk ~lah II I !1 I I I I I I I '1 ~t t'1 I I I-~:t, t I I #$ Bottom of Hog Hole Perc. '¢', 94- 3D $0 $0 I I p~OL/,.'TION ]~k"~- .~0 (~m~m:n) P=-RO HO'= DIAMET--mR · T~'~ RUN B~-T~r--SN ' :~' ~T AND ~ ~ Cavity presoaked prior to testing. I I I Michael E. Anderson AND MUNICIPAL GUIDELINSS IN 5FF5C7 ON ?H!S DAT! DAT--' ON-SITE WASTEWATER DISPOSAL SYSTEM CONSTRUCTION AND MATERIAL SPECIFICATIONS SUBJECT: LOT 85B, DOUBLE G SUBDIVISION GENERAL: The scope of this project includes the procurement and placement of a new 1,250 gallon septic tank. It also includes the construction of a 50' long x 3' wide x 8' effective depth absorption trench at the location shown on the attached Site Plan. The total depth of the trench will be 10.5' below existing ground. The distribution piping will be placed at 2.5' below the ground. Mounding over the trench may be required to provide the minimum protective cover. The location of the new well to be placed on the lot is also shown on the site plan. It is essential a minimum of 100' of clearance be maintained between the well location and all components of septic systems on this and other lots in the area. 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. 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 Department of Health and Human Services for system installations. Owners installing their own systems must receive prior approval from D.H.H.S. before beginning system installation. SEPTIC TANK INSTALLATION 1. The 1,250 gallon septic tank must be procured from an approved source and installed at the location shown on the plans. 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. Lot 85B, Double G Subdivision August 27, 1999 Page 2 of 3 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 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. 7. Grade area surrounding the absorption trenches to drain away. A minimum 2' of accepting soil is required below the drainfield reck for a 5' wide trench. Contractor shall verify this condition prior to placement of the reck. All pockets of unacceptable materials must be removed and replaced. 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). Lot 85B, Double G Subdivision August 27, 1999 Page 3 of 3 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: A minimum of two inspections are required by Municipal Ordinance. 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.