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HomeMy WebLinkAboutKNIK VIEW ESTATES BLK 3 LT 21 Municipality of AnchoragePage _ 1 ~ 1.F ) DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVlSIO'N P.O. Box 196650 · Anchorage, Alaska 99519-6650 · Telephone: 343-4744 On-Site Wastewater Disposal System and/or Well Inspection Report Permit Number: sw980080 PIDNumber: 05104323 Name: Waldec Enterprises Wastewater System: ~5~New [] Upgrade Address: 22647 Judd Dr. Anc., AK 99567 ABSORPTIONFIELD Phone: NO. of Bedrooms: 344-5678,~ ~DeepTrench r-i Shallow Trench ~Bed ~Mound DOther LEGAL D ESCR I PTi ON so,, ~.ting: Total Depth ,rom original grade: .45 GPO/Sq, Ft. 1 3 ' Lot: Block'. SubdN~ion: Depth (o pi~e bo~om from odginal grade: Gravel depth beneat~ 21 3 KNIK VIEW Ests. 3 ~. 10 Township: Range: S~tion: Fill added above original grade: Gravel length: 1 - 2 ~t. 72 ~. WELL: Q New ~ Upgrade G~v.~ width: Number of lines: 01s~cebe~eenlin~: 3 ~t. 1 1 ~. C~ifl~tion (Private. A,B.C): Total Depth: C~ To; Total aOsorpt[on area: P~pe material: Ciasa A System ~t ~. 1 ,440 se.~. ASTM D3034 PVC Orillec Date Odll~: S~cwater Level: Installe~ Oate installS: ~ Sanders & Sanders 4/29/98 SEPARATION DISTANCES ~s~,c s Ho,~,~ ~ S.T.~.~. To Septic Abso~den Uff ~ldlng ~bl~Pdva~e Manufacturec CaPaciW in gallons: From Tank Reid Station Tank ~r Lin~ Anc, T~nk ; 1 / 250 Material: Number of Compartments: Well >200' >200' H/A H/A ~/~ Steel Sudace 0 ~ w~.~ >~0 >~00 ~/~ ~/~ u/~ LIFT STA~'ION Line Lot >5~ ~ ~ ~/~ ~/~ ~/~ Size in gallons: Manufacturer: Foundation > 5 ' > 1 0 ' N/A N/A N/A "Pump on"level at: "Pump off" level at: High w~ter alarm at: CudaJn Pump Make & Mouel Electrical Ins0ections pedormed by: Drain None on Let Remarks: See Lot Line W~iver for BENCH MARK Absorption Trench. Location and Description: Garage Floor Slab ~umo~ ~lovation:~ 0 0 · 0 g~, ENGIN~E~SEAL Inspections pedormed by: A. Harala Dates: 1st 4/29/98 : ~ / ~':' :~ 2nO 4/29/98_ ~ ~ ~ Department of Health and Human Se~ices approval ":?/'~;: ~'~ Reviewed ~nd approved b _ ~~ Date: ]0-~.~¢ ~:.;',':',)F,":.'; 72~O13 (Rev, 9/91) MOA 25 August 11, 1998 Municipality of Anchorage Department of Heath & Human Services 825 "L" Street Anchorage, AK 99502-0650 Subject: Lot 21, Block 3, Knik View Estates Subdivision Lot Line Waiver Request Dear On Site Services Engineer: RECEIVED Municipality of Anchorage Oept. Floalth & Human Servicos The absorption trench on Lot 21, Block 3, Knik View Estates Subdivision was constructed within 5' of the northern lot line. This was apparently done to allow additional room for placement of the septic tank and to maintain required separation distances fi'om the house foundation. House placement was critical due to the topography of the lot, steepness of the driveway and the size of the house. Lots in this subdivision am served by a connnunity water system eliminating any conflicts with adjacent wells. The septic system on the adjacent lot is more than 60' away. Underlying soils have an absorption rate of .45 gallons per square foot per day and consist of fairly silty gravel with some sand. No groundwater has been noted in the area and any risk of contamination seems remote. We therefore recommend a waiver be issued to allow construction of the absorption trench to within 5' of the northern lot line. Please let me l~mw if you have additioual questions. Sincerely, Michael E. Anderson, P.E. 2 3 Permit No. SW980080 Page of Municipality of Anchorage DEPARTMENT OF HEALTH AND HUMAN SERVICi~S ENVIRONMENTAL SERVICES DIVISION P.O. Box 196650 · Anchorsge, Alaska 99519-6650 · Telephone: 343-4744 On-Site Wastewater Disposal System and/or Well Inspection Report Legal~ Description: LT 21, BK 3, KNIK VIEW ESTATES S/D PIDNoi: 05104323 ! / ,/ A B C C1 3.9 S1 -32t,~ 7 t 0.5 - - S2 3.8'5 13.3 C2 14.8 25.0 -C3 ..... 15~9 24~7 _c4 ..... o M2 : 39.6 38.6 -C5 ......... ~7-- . -52-;2 .... 45-.-1---- / / / / % SP1 Se,p, tic Pump, compa,r, tment 1 SP2 " 2 C Clean Out C2~ r$2 4 BR House- C PLAN AS-BLT 1" = 20' M1 Permit No, SW980080 Page 3 of '~ Municipality of Anchorage DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAl. SERVICES DIVISION P.O. Box 196650 · Anchorage, Alaska 99519-6650 · Telephone: 343-4744 On-Site Wastewater Disposal System and/or Well Inspection Report i i ! Legal Description: LT 21, BK 3, KNIK VIEW ESTATES S/D__ PIDNo.: r)~ln4'~?3 I I ' , ' ' · ~ I i6/\ ' * ' ' I ' ' I__ I I lo. pc_ ~',~..~_~J.~~ : ~ ~ f;~-'b r i c ~ R~O C K LEGEND SP1 Septic Pump, compartment 1 SP2 " " " 2 C Clean Out MT ELEVATION 1" = 10' AS-BLT Monitor Tube PERFORMED FOR:. Municipality of Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG ~ PERCOLATION TEST LEGAL DESCRIPTION: OL 3 4 9 10 11 12 13 14 15 16 17 18 ~ r~ (E~'GINEER'S SE~L), Township, Range, Section: SLOPE SITE PLAN WAS GROUND WATER ENCOUNTERED7 IF YES, AT WHAT DEPTH? L Reading Date Gro~ Net Depth to Net Time Time Water Drop ~1 z.: l~' -- ~ 'h." ~ ,, I _ PERCOLATION RATE ~__ Iminute~nch) PERC HOLE DIAMETER __ TEST RUN BETWEEN ~-' FT AND ~' FT PERFORMED BY: AOOORDA.OE W,T~*LL S'~^~'~ A,~O,.,UN,O,P*L ~,,,D~.,NES ,. E~EO~' ON ~'H,S 0^'~_ O^TE' ~/l. lq~' 72.,008 (Rev. 4/85) Rick M?strom. Mayor MtmicipaliDT of Anchorage Department of Health and Human Services 825 "k" Street P.O. Box 196650 Anchorage, Alaska 99519-6650 hllp://www.ci.anchorage.ak.us October 29, 1998 Michael E. Anderson, P.E. Anderson Engineering PO Box 240773 Anchorage, Alaska 99524 Subject: Waiver Request for Lot 21 Block 3 Knik View Estates Waiver Request #WR980049, PID #051-043-23, HA980229, SW980080 Dear Mr. Anderson: Your request for a waiver of the required 10 foot separation between an on-site wastewater disposal system and a lot line has been approved. The waived distance is 5 feet from the absoroti6n field to the north property line. This approval applies to the existing on-site wastewater disoosal system lot line separation only. Any future upgrade to the on-site wastewater disposal system will require all separations be met:or another approval from this department. If there any further questions or concerns regarding this waiver, please call our office at 343-4744. Sincerely, Engineering Tech On-site Services ljw #7 MUNICIPALITY OF ANCHORAGE Department of Health and Human Services On-site Services Section Waiver Review Werksheet Date Received: AuKust 12, 1998 Legal Description: Lot 21 Block 3 Knik View Estates Subdivision Engineer: Michael E. Anderson, F.E., Anderson.En~inesrtnK PO Box 240773, Anchorage, Alaska 99524 Applicant: Waldec Enterprises Waiver Requested: Lot line waiver of 5 feet from the absorption t~ench to the northern lot line, Criteria: 1. Geology: A. Water Table B. Soil Sorption C. Permeability D. Water Table Gradient E. Horizontal Separation TOTAL: Special Conditions: Points: 3. Other: is Granted: ~ Waiver ~s NOT Granted: Waiver /. List Conditions or Reasons for above: Date: Rec ~: 4110~4184 By: N~e/~f- R~iewer Amount: $ 115.00 Date Paid: Aqg 12, 1998 DATE: October 8, 1998 MEMORANDUM TO: Jeff Poet FROM: Mike Anderson, P.E. SUBJECT: Lot 21, Block 3, Knik View Estates Subdivision CmXificate of Health Authority Approfval On August 26, 1998, a testhole was dug at the extreme east end of the completed absorption trench to verify that no groundwater was present 4' below the bottom of the trench and no bedrock was present 6' below the bottom of the trench. The total depth of the trench was in excess of 26'. In order to get to this depth the backhoe was required to bench down approximately 6' and then excavate the testhole an additional 20'. No groundwater was encountered nor was any noted during the monitoring Period. In addition, no bedrock was found. A testhole log is attached for your review. Soil materials encountered were identical to those encountered during construction of the system and in Testholes No. 1 and 2. Municipality of Anchorage DF..PARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502'-0~50 SOILS LOG -- PERCOLATION TEST 2 3 5 7 8 9 10 11 13- 14- 15 16 17 18 19 2O COMMENTS . SITE PLAN I ' I WA~ GROUND WATER ENCOUNTERED? S[ I ' iF YES. AT WHAT DEPTH? I I I t Gross ] N~ Deism ~o Net Reading ~1;e '~rn~ T~me Water Drop, I J I I PERCOLATION RATE __ {m~nute~mci~} PERC HOLE DIAMETER TEST RUN B~'TWE-'N FT AND FT : MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND HUMAN SERVICES P.O. BOX 196650, 825 "L" STREET, ROOM 502 ANCHORAGE, ALASKA 99519-6650 ON-SITE WASTEWATER DISPOSAL SYSTEM PERMIT PERMIT NUMBER:SW980080 DESIGN ENGINEER:ANDERSON ENGINEERING OWNER NA/~E:WALDEC ENTERPRISES INC OWNER ADDRESS:22647 JUDD DR ANCHORAGEf ALASKA 99567 DATE ISSUED: 4/27/98 EXPIRATION DATE: 4/27/99 PARCEL ID:05104323 LEGAL DESCRIPTION: KNIK VIEW ESTATES BLK 3 LT 21 LOT SIZE: 21864 (SQ. FT.) NUMBER OF BEDROOMS: 4 THIS PERMIT: 4 THIS PERMIT IS FOR THE CONSTRUCTION OF: DISPOSAL FIELD /SEPTIC TANK SYSTEM 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 343-4744 ( 24 HOURS ) (NOT REQUIRED FOR WELL ONLY PERMIT) 4. FROM OCTOBER 15 TO APRIL 15 A SUBSURFACE SOIL ABSORPTION SYSTEM UNDER CONSTRUCTION DURING FREEZING WEATHER MUST BE EITHER: : A. OPENED AND CLOSED ON THE SAME DAY B. COVERED, SEALED AND HEATED TO PREVENT FREEZING 5. THE FOLLOWING SPECIAL PROVISIONS. SPECIAL PROVISIONS ISSUED BY: ~J. DATE: April 9, 1998 Municipality of Anchorage Department of Heath & Human Services 825 "L" Street Anchorage, AK 99502-0650 Subject: Lot 21, Block 3, Knik View Estates Subdivision Septic System Design Impacts to Adjacent Properties Dear Onsite Services Engineer: We hereby apply for a permit to construct an onsite septic system on Lot 21, Block 3, Knik View Estates Subdivision. The attached site plan and backup documentation identify the size and location of the new septic system to serve the four bedroom home to be constructed on the lot. The subdivision is served by a community water system and al! required separation distances are easily met. No conflicts exist with other septic systems in the area. Testholes placed on the property revealed gravelly silts which percolated between 30 and 60 minutes per inch. We have designed a deep trench absorption system with 10' of effective depth because of:the slow percolating soils and the small area available on the lot for a syStem. The total depth of the system will be 13' below the surface. Insulation may be required to provide sufficient cover above the system. The surface of the lot slopes from east to west at varying grades. The back half of the lot is fairly steep and probably not acceptable for system placement. The area designated for the system is fairly flat, but this location has also been identified as the home site restricting the available surface for the septic system and replacement site. oufficient room is available, however, if the lot is developed as shown on the site plan. Lot 21, Block 3, Knik View Estates April 9, 1998 Page Two If the system is constructed as designed 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 subdivision is currently served by a community water system. 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 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 LOT 21, BLOCK 3, KNIK VIEW ESTATES SITE PLAN SCALE 1" = 30' LOT 21, BLOCK 3, KNIK VIEW ESTATES 1,250 GALLON SEPTIC TANK TH NO. 2 FLOW SPLITTER~ VALVE 3' WIDE X 10' EFFECTIVE DEPTH ABSORPTION TRENCH SYSTEM PLAN SCALE 1" : 10' EN 18 (10/78~ LOT 21, BLOCK 3, KNIK VIEW ESTATES SUBDIVISION DESIGN FACTORS: Four Bedroom Home Perc. Rate: 40 Min./Inch Application Rate: .45 GPD/SF 4 Bedrooms X 150 GPD = 600 Gallons Per Day 600 GPD/.45 GPD/SF /20 SF/LF = 67 LF Trench SYSTEM REQUIREMENTS: Deep Trench System 1,250 Gallon Septic Tank 10' Gravel Beneath Dist; Pipe Therefore: Construct a Deep Trench System with Two Laterals Each 34' in Length. Distribution Piping to be Placed at 3.0' Below Original Ground Level. Mound over Trench to Provide Minimum of 3.0' Cover Over Pipe. Flow Splitter Valve Required to Distribute Flow to Trenches. NOTE: /0'--0" Grade Area to Drain Away, ~2'~'~')~, ......,,;,x~;~, 77' 3 Cover Requ red Over System or 2' nsuaton .1 4 15' 14 17 · '~b-'T RUN ~ ~' FTAND ..-...~_. F'r PE~'FORMF.~ IN 3 4 10- 14 15 16 SrTE PLaN WATER ' t t t~ t !_ ON-SITE WAST'EWATER DISPOSAL SYSTEM CONSTRUCTION AND MATERIAL SPECIFICATIONS SUBJECT: LOT 21, BLOCK 3, KNIK VIEW EST. SUBDIVISION GENERAL: 1. The scope of this project includes furnishing and installing a new 1,250 gallon septic tank. It also includes the construction of a new 68' total length by 3' wide by 1 0' effective depth absorption trench. The distribution piping must be placed at 3.0' below the ground surface. MOunding over the trench may be required to provide a minimum of 3' of protective cover. 2. 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. 3. 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. 4. 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. 5. Contractors installing wastewater disposal systems must be certified by the Municipal Department of Hea!th 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. A new 1,250 gallon septic tank must be procured from an approved source and installed at the location shown: on the plans. Lot 21, Block 3, Knik View Estates April 8, 1998 Page Two 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. DRAINFIEL. D 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. 2. Distribution piping must be placed level with perforations down atop alevel 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. Lot 21, Block 3, Knik View Estates April 8, 1998 Page Three 5. 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 con~munity well. 6. 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 away. to drain 8. 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. 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 watertight couplings (Caulder, Fernco, or equal). with Lot 21, Block 3, Knik View Estates April 8, 1998 Page Four 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 acopy of all field survey layout and construction notes for use in preparing the certified as-built of the completed system. Municipality of Anchorage P~ F CEil V F. [) ~ DEPARTMENT OF HEALTH & HUMAN SERVICES : Environmental Services Division AUG l'r2 1998 825 L ¢' · OM7)nic~pality 0f Anchorage otreet, Room 502 Anchorage, Alaska 99501 · (90 343-47~..4 C)ept. Health &Human Services Health Authority Approval Checklist Block 3~ Knik View ParcelI,D,: 051 04323 Estates Legal Description: Lot 21 r A, WELL DATA Well type ~__ IfA, B, or C, attach ADEC letter. Ar)EC water system number Log present (Y/N) Date completed Total depth Cased to FROM WELL LOG Sanitary seal (Y/N) Date of test Static water level Well production g.p,m. WKTERSAMPLERESULTS:- Public Water System Coliform Nitrate Date of sample: B. SEPTIC/HOLDING TANK DATA Date installed 4/29/98 Tanksize 1 .. 250 Collected by: 218409 Casing height (above ground) Wires properly protected (Y/N ' AT INSPECTION Foundation cleanout (Y/N) Date of Pumping C. ABSORPTION FIELD DATA Date installed 4/29/98 Length 72 ' Width Number of Compartments Depression (Y/N) Pumper Construction Y _ Soil rating (g,p.d./ft~ or fF/bdrm) .45 3 ' Gravel thickness below pipe Effective absorption area 1 , 440 S F Monitoring Tube present (Y/N) Y Date of adequacy test New Const, Results (Pass/Fail) Pass Fluid depth in absorption field before test (in.); Immediately after Other bacteria __ g.p.m, 2, Clean0uts (Y/N) y High water alarm (Y/N) ! ~ _ System type~Dc_c_p q~T'~nc.h 10' _ Total dePth 13'- 17~' __ Depression over field (Y/N) ~,1 _ For 4 ' bedrooms gal. water added (in.): __ Fluid depth (ins) Minutes later: Peroxide treatment (past 12 months) (Y/N) 72-026 (Rev. 3/96)* Absorption rate = If yes, give date .g.p.d. LIFT STATION - None Date installed Manhole/Access (Y/N) High water alarm level at* on Lot Size in gallons "Pump on" level at* *Datum "Pump off" level at* Cycles tested SEPARATION DISTANCES SEPARATION DISTANCES FROM WELL ON LOT TO: Septic/holding tank on lot Absorption field on lot Public sewer main Sewer/septic service line No Well on Lot On adjacent lots On adjacent lots Public sewer manhole/cleanout Lift station SEPARATION DISTANCES FROM SEPTIC/HOLDING TANK ON LOTTO: Foundation > 5 ' Property line > 5 ' Absorption field Water main/service line > 1 0 ' Surface water/drainage > 1 00 ' SEPARATION DISTANCE FROM ABSORPTION FIELD ON LOT TO: >5' Wells on adjacent lots > 200 ' Property line Su trace water Curtain drain 5' ww Building foundation > 10 ' Water main/service line > 100 ' D~iveway, parking/vehicle storage area > 10 None on Lot Wells on adjacent lots >200' F. ENGINEER'S CERTIFICATION I certify that I have determined thru field inspections and review of Municipal re~s~that th~ a~o~e systems are in conformance with MOA HAA guidelines in effect on this date. S,gnat.re Engineer's Name Michael E. Anderson: P.E. Date 8/11/98 HAA Fee $ ~ Date of Payment Receipt Number Waiver Fee $ Date of Payment Receipt Number ((~,L.I \\~) 72-026 (Rev. 3/96)*