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HomeMy WebLinkAboutNORTON PARK LT 31ANo ton Pa k Lot 3lA #016-151-51 Municipality of Anchorage .." .. Development Services Department Building Safety Divbldn ~.~ On. Site Water and Wastewater Program. 4700 S. Bragaw St P.O. Box 196650 Anchorage. AK 99519-6650 Page www.ci.a nchorage.ak.u$ (907)343-7904 ON-SITE WASTEWATER DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT Permit Number. ~c~ OOo¥ ¢~, PIDNumber:. n,.~, ..~'ctme.r I~hee le.t Wastewater System: [] New [] Upgrade ,~=,e,, II"lOI "r~n ~er l~nt Dr% Az~c~ ~95't5- ABSORPTIONFIELD LEGAL DESCRIPTION o. 8 o.~f to, 7 n, -- 31 *q No,..l~e..,n p~n,"t<. 3. ?- F,. 7...c ~,. O-&' n. &'¥ ~,. Well: ~--y,,t,~7' []New []Upgrade ~..q' ~,. TANK SEPARATION DISTANCES I~ septic [] Holding [] S.T.E.P. [] Other. ~ Septic Abso~tion Lift Holding Pubr~c/P~'at~ Tank Field Station Tank Sev, er Une ~'/~ F..I~O~4Z'~ '7'~ ~/~ I000 r~. LIFT STATION to, t*,, ~O' ~Z:" -- - / X P'~ ~"'~ a v'°~ ~.,, ~..,,.~. ~.,.....~ ~ "'"~" BENCH MARK Engineer's Stamp Inspectionsperformedby: I~lc~t-/,o~ 'Itc~, ~¢, Dates: 1" Iol~/oo ~..~ Development Services Department Approval '"":'" - PERMIT NO: SW000410 PID NO: 016-151-51 SWING TIES: FROM: COR. "A" COR. "X" TO: S.T.C.O. "C" 68' 39' S.T.C.O. "D" 74' 38.5' DBL. C.O. "E" 77' 37.5' TR. C.O. "F" 73' 20.5' TR. M.T. "G" 92' 34' TR. C.O. "H" t15' $9.5' LOT 31A NORTON PARK SlD PLAN VIEW SCALE: 1" = 30' PAGE 2 OF 2 NEVV 54' LONG SOIL ABS. TR. W. 7.5' GV!_ BELOW PIPE r· TH NEW 1000 GAL. SEPTIC TANK ABANDONED , · SOILABS. TR. "" 3' SOIL COVER 2' SOIL COVER INS. INV. 92.0' 54' LONG s0iLABS. TR. i~ W. 7.5' GVL. BELOW DIST. PIPE , , Bo'FrOM TR. '' T.H. #1 ELEV. 84.5 '',/~M.T. DRY ',, ~/ ELEV. 77.2 , . INV. PROFILE VIEW NOT TO SCALE INV. NEW i000 GAL; INV. 92.3' SEPTIC TANK '. 92.5' LOT 31A, NORTON PARK S/D SEPTIC SYSTEM UPGRADE AS4~UILT INSPECTION REPORT FLA'FI'OP TECIINICAL SERVICES 14530 ECIIO STREET ANCIIOP, AGE, ALASKA 99516 SCALE: AS NOTED DRAWN BY TFM FEBRUARY, 2001 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 (907) 343-4744 ON-SITE WASTEWATER DISPOSAL SYSTEM PERMIT Upgrade Date Issued: Oct 02, 2000 Expiration Date: Oct 02, 2001 Permit Number: SW000410 Legal Description: NORTON PARK LT 31A Design Engineer: 0019 Flattop Technical Services Owner Name: JAMES WHEELES Owner Address: 11701 TIMBERLANE DR ANCHORAGE, AK 99515-3323 Parcel ID: 016-151-51 Site Address: 011701 MARY AVE Lot Size: 41426 SQ. FT. Total Bedrooms: 3 Permit Bedrooms: 3 This permit is for the construction of: [] Disposa Fie d [] Septic'rank [] Ho dingTank [] Privy [] Private Well [] Water Storage All construction must be in accordance with: 1. The attached approved design. 2. Ail 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. B. Covered, sealed, and heated to prevent freezing. Received By: J.,e..,~ ~ Issued By: ~ Date: CIVIL& ENVIRONMENTAL ENGD~EERLNG · t'NERG¥ CONSERVATK)N & ANALYSIS TllEODORE F. MOORE, P.E. 14530 ECllO ST. Pll: (90'/)345-1:)$5 ANCHORAGE, ALASKA 99516 September 28, 2000 M.O.A. DHHS P.O. Box E}-6650 Anchorage, AK 99519 Dear Sirs: The purpose of this letter is to provide the required design narrative in support of our application for a permit to upgrade the wastewater disposal facilities on Lot 3 IA, Norton Park S/D, located at 11701 Timberiane Drive. The original trench is no longer able to accept the wastewater load generated in the residence. Soils logs, pete test results, a site plan, design drawings and specifications are enclosed for your review. The proposed system will be constructed in the vicinity oftest hole # I. As can be seen from the soil log, the native material below 4.5 feet is a silty sand with a measured pert rate of 4 minutes per inch. Using a somewhat conservative soil application rate of 0.8 gpd/sq, ft., this 3-bedroom residence requires a total absorption area of(3 x 150)/0.8 = 563 square feet. The proposed 41-foot long trench design with 7 feet ofeffective gravel between 3.5 and 10.5' below ground level has a total absorption area of 574 square feet. The topography of the lot slopes down from the north at 25% towards the test hole and then is essentially level for the next 50 feet south ofthere. The proposed project will have no significant impact on present or future water supply and wastewater disposal systems serving adjacent properties, nor will it have any significant impact on reserved space-surface and subsurface, or on drainage. Please give me a call at 345-1355 if you have any questions on this submittal. Sincerely, Ted Moore, P.E. I , ,' LOT 32B I ,,', LOT 32C , (NO WELL · , WITHIN 100') I , ,~ ~ ,, t , I ~ ', , Wi=LL i_>~ ,' .I ~ ,, ............ . CONSTRUCT NEV~ ;'............... m ~ ~ ,, ...--- .... 41'LONGTRENCH ~ ', , < .., -. W. 7.0 EFF. G~VEL/ , ' LOT 31B-1 m ~ ~ , '.. INSTALL NEW ,,' 0% : : (NOWELL --~ " '. ~ 1000GALLON~- '~ F * WITHIN100') m~,, ... SEPTIC TANK , ~ AB~DON ~ISTING ~ ~',', ', m ,, , LOT 31B-2 I ', WELL ~ SEPTIC TANK ~D ~/ '"~ ' (NO WELL , - ' ' ............ ' -.SOIL ABS. TRENCH ' WITHIN 100') ~OT ' , I ' NORTON PARK SID .... m / '- . . . . . ' ', LOT 31C m ,, WELL ~ ~'~'~:~ ...................... ::: ~ SEPTIC m ~,.~ ~.......~; ;~., LOT 31A, NORTON PARK · " ~ · .. ,~ I ,, ,~., ~ ~,~ %~ ¢. WELL AND SEPTIC SYSTEM · . 5' ~ ~'9~ % ~ SITE P~N m ~~*~.~ok~ F. ~oo8~ - ~ .- ~OPTECI~C~SER~C~ I INCH=f0FEET m .- ' 14530 ECl IO S~ET D~WN BY TFM · ~-: ~9 * ~ ~ ~CIIO~GE,~S]6 SEPTEMBER, 2000 ,. , ' '' . ~ ~' NOTE: THISlSNOTASURV~EDP~T. m '. ..... ,. P~ ALL LOCATIONS SHOWN ARE APPROXIMATE. "A" ~' . 4" DI~ F-810 PERF. PIPE :::::::::::::::::::::::::::::::::::::::::::::: NEW 1000 GALLON SEPTIC TANK NEVV FDN. C.O. & 4" D-3034 FM. HOUSE CONSTRUCT 41-FOOT LONG SOIL ABSORPTION TRENCH WITH 7 FEET EFFECTIVE GVL BETW. 3.5' & 10.5' BELOW GND. DBL ~ C.O. PLAN VIEW SCALE: 1" = 10' MONITOR TUBE CLEANOUT -- MOUND BACKFILL6" SECTION "A - A" SCALE: 1" = 5' ORIGINAL GROUND FILTER FABRIC 4" Db~ F-810 PERF. PIPE 1/7' - 2 1/7' SEWER GRAVEL ~OTTOM OF EXCAVATION LOT 3lA, NORTON PARK S/D SEPTIC SYSTEM UPGRADE PLAN AND CROSS-SECTION FLA"I'I'OP TECl INICAL SERVICES SCALE: AS SI IOWN 14530 ECHO STREET DRAWN BY: TFM ANCIIOP, AGE, AK, 99516 SEPTEMBER, 2000 qrfattop q'eclinicaf Services 14530 ~.c~o Street, ~nctforage,.,q~ 99516 {P~one (907) 345-1355 Lot 3lA, Norton Park S/D 11701 Timberlane Drive Wastewater disposal system installation Specifications 1.0 General: 1.1 The scope ofthe project consists ofabandoning an existing septic tank and installing a new 1000 gallon septic tank and constructing a new 41-foot long soil absorption trench containing a total of 7.5 feet of sewer gravel. 1.2 Construction shall be as depicted on the approved site plan and design drawings. Minor deviations from these drawings may be allowed or required by the engineer conducting the inspections. All construction procedures and material specifications shall conform to Municipal and State requirements. All separation distances shall be in conformance with Municipal requirements, unless specifically waived. 1.3 The contractor shall be responsible to obtain any necessary utility locates, and to work around any buried utilities. 1.4 The contractor shall provide adequate cover material and rough grading over all system components to ensure that proper drainage is achieved after settlement and that there are no residual depressions. Insofar as possible the contractor shall minimize damage to trees and existing lawn areas. 1.5 Unless specifically agreed otherwise, the homeowner shall be responsible for finish grading after the soil is compacted, as well as placement of topsoil and reseeding all areas disturbed by the construction. 2.0 Septic Tank: 2.1 The existing septic tank must be properly abandoned by thoroughly pumping, removing the top and backfilling with soil. 2.2 The new 1000 gallon, 2 compartment septic tank shall be Municipally approved and shall be set level on undisturbed soil. Each compartment shall be equipped with a watertight manhole cover and a 4" cleanout. Ifthe tank is buried less than 4 feet, it shall be insulated with 2 inches of approved burial type, rigid insulation. 2.3 AII pipe connections to the tank shall be equipped with waterproofmechanical couplings. The waste line from the residence to the septic tank shall have a minimum slope of I/4'" per foot, and the waste line between the tank and the soil absorption system shall have a minimum slope of I/8" per foot. A cleanout shall be installed within 14 feet of the building foundation, and a double cleanout shall be installed within 5 feet downstream of the septic tank. 3.0 Soll absorption system: 3.1 The soil absorption system shall be constructed by excavating a 4 l-foot long trench to a depth of 10.5 feet below original ground level. 3.2 The bottom of the excavation shall be level. Any compacted or smeared surfaces shall be raked to allow proper infiltration. 3.3 A total of 7.5 feet ofapproved sewer gravel shall be placed in the bottom ofthe excavation with the perforated distribution pipes laid level such that the pipe inverts are no less than 7.0 feet above the bottom ofthe sewer gravel. Sewer gravel shall be 0.5" - 2.5" screened gravel, with less than 3% passing the #200 sieve. 3.4 Monitor tubes and cleanout pipes shall be of 4" diameter and installed in the locations shown on the design drawings. The portion of the monitor tube extending through the sewer gravel shall be perforated. 3.5 Approved filter fabric shall be placed over the entire top surface of the sewer gravel. A minimum of 2 feet of soil cover is to be placed over the filter fabric. Ifthe soil cover thickness is less than 3 feet, two inches of rigid, burial type insulation is to be placed over the entire top surface of the gravel, in addition to the filter fabric. 3.6 The top surface of the cover material shall be raised a minimum of 6 inches higher than the surrounding terrain to allow for subsequent settlement, and shall be graded to smooth contours. Fill slopes shall be no steeper than 3:1. 3.7 Unless specifically agreed otherwise the homeowner shall be responsible for arranging to have the site finish graded after the backfill material has stabilized, and for placement ofadequate topsoil and seed to promote rapid revegetation ofall areas disturbed by the construction. 4.0 Inspections: 4.1 A minimum of4 engineering inspections will be required during the course ofthe project: (1) initial stakeout with the contractor to establish the location ofthe system and to discuss the plans, specifications and construction procedures, (2) after the native material has been excavated to expose the infiltrative surface to ensure that it is level and at the right elevation, and conforms with the soil test information, (3) after the sewer gravel is in place and the distribution pipes have been laid and connected up to the septic tank, but prior to placement of insulation or filter fabric, and (4) after rough backfill and grading is complete. The septic tank requires one inspection after it is set level and the piping connected, but prior to backfill. This inspection may be incorporated with any of the above inspections. 4.2 The installer shall coordinate the timing ofthe inspections with the engineer sufficiently far in advance to ensure the availability of the engineer. TEST HOLE # ] LEGALDESCRIPTION: DATEPERFORMED: PERFORMEDFOR: DEPTH-- (feet) 17- 18 19- 20- COMMENTS: FLATTOP TECHNICAL SERVICES 14530 ECHO ST. ANCHORAGE, ALASKA 99516 SOILS LOG -- PERCOLATION TEST Lot 31A, Norton Park S/D S eptember_l.9..2000 d a m~s_WJ~L~ SLOPE SITE PLAN SM Silty sand tiff w. buried concrete slabs SM reddish sandy loam SM Gray gravelly silty sand D~ and "ltuff~ to 13.5' Cobbles & boulders betw. 10 & 13.5' Clumps of wet silt below 13.5' T.H. 68 #1 SEPTIC -- SYSTEM Depth to Groundwater Date ._H o_gr~u~_chv~ter 9/1 g/00 Monrtor ~u_bp dry 9/~6/00 Date Reading Clock Net Time Percometer Net Drop Time (minutes) Reading (inches) 9119 12" Presoak Resoak Add water & start 3:35:30 23 5/16 #1 3L50:30 15 19 4 I~/16 Add_water 3:51 23 7116 #2 4:08 15 19~J/8 4 1/16 Add__water 4:06~30 23~5/8 ~3 4:21:30 15 19 9/16 4 1116 PERCOLATION RATE 4 (minutes/inch) PERC HOLE DIAMETER TESTRUN BETWEEN 6.75 FTAND 7,25 FT Recommend using soil application rate of 0.8 gpdlsq, ft. for SM soils between 3' and 13.5' PERFORMED BY FLATTOP TECHNICAL SERVICES. I ~'".,~.~ ~ CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: ,.~.~ ~"~ /x ,, ~/~, MUNICIPALITY OF ANCHORAGE 'Y~1~ ' DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION i ENVIRONMENTAL ENGINEERING DIVISION 825 L Street- Anchorage, Alaska 99501 Telephone 264-4720 ON-SITE SEWAGE DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT NAME [P H'"O-N-g MAI LING ADDRESS ~LEGAL DESCRIPTION NC. OF BEDROOMS Well Absorption area Dwelling PERMIT NO. DISTANCE TO: ~ ~ Z Manufacturer Material No, of compartments Liq. capacity in gallons Inside length ~ I I Width ~ Liquid dep, h, ~ -- ~ Manufactursr Material Uquid caoaciW in nallons ~ Well Foundation Nearest lot line PERMIT NO. ~__ N°'°flines ~ Length°feachline~ T°tallength°flines~ Trenchwidth~% inches Dis'ance between lines ~ ~ Top of tile to finish grade- ~ I u Material beneath tile~ ~ Total effective abs~r~t~rea ~ ~ ~ inches Length Width~ V~ ~ ~ ~ Depth PERMIT NO. ~ Type of crib Crib d~e~er : Crib depth Total effective absorption area ~ Well Building foundation Nearest lot line ~ DISTANCE TO: Depth Driller Distance to lot line PERMIT NO. ~ Class ~ Building foundation Sewer line Septic tank Absorption area(s) ~ DISTANCE TO: OTHER SOIL TEST RATING ~ 9 xo INSTALLER ~A REMARKB(~ ~ rr x 72-013 I d r -r -% M -W DRILLING, INC. UM SITE ID W"oEq,40 ►���� �:1 DRILLING LOG ��� �0 Well Owner Jim Wheeles Use of Well DMu. Location (address of: Township, Range, Section, if known; or distance main road Lot 31A Norton Park Subdivision, Anchorage Size of casing---6!--Depth of Hol Static water level 60 ft, Screen ( ); Perforated Describe screen or Well pumping test at—_g+ of drawdown from static Date of Cased to---78---l-5-feet land surface. Finish of well (check one) open end ( x ) ; (minute) :for----l---hours with 100% XK. WELL LOG Depth in feet fromh4 ti . ground surface Cx ;i b.f rmations penetrated, size of material, color and hardness 2 TO 11 4 —1.L --TO 72 --2-L--TO i4 --- Z.4—TO 80 —TO- -TO- 0- 0— TO- -TO OTOOOTOTO NWWA Certified Contractor n"r ease NO;% 9-j & 9,^;T 2 —STATE bEl:.l I):'1" 1`.40. :::IF'I:':'L :[ E:RNT J' ]: f'l !-,.lt'.l[i[E:L.E:_'_~.:ii; :E:JJ:Zd. "rI...II~:I',Ii::iGFt :[ 1`.4 E,L. I.. 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LOGS FIRE: REC.:!U:[.F?.E[) ¢11`.,1[;:, I',1U2;T Ei~E: f,~:ETIJI:;.'.i'.,IED TO THE C:,EF'RRTHE1`.,IT 14):TH:(N 38 ('.'il:;:' THE I-,.IELL cor,IF'L. ET]: ON. OTHEi';.: R[::.I.';!U :[ Ri!EH[:.:NT% HR'.,.' FIF'F'I...'.r'. E;F'EC: :[ i.: :[ CFI"I' .'[ I.".:11`.,12j; f:11`'4E:, COI',I:J~';TF.':UCT ~[ El1`..! [::, :!: f:IGI:;?.F:IH:!:!; I::IFUE ~:I',,,'FI:[i...FIBLE TO :1: NSUF..:E PF:'.OPEt7 ]: NSTFIL. LFIT :[ O1'',1. I CE'F:'r I F",,.' THRT :L: i f:lH F:'Ffl"IIt~.II-'.IR I,.I]:'I"H THE F..'EQLIIREHENT'..~ F'O[~: OI'.,I--..:SI'l"E :::;EI.,]E:R:E; AND !.,.IEL. L..:L'.; i:'OF.'/H4 [.::'.r' THE HUN :[ C I I::'FIL .T. T"r' OF' RI',IE:HOF:FIGE:. 2: :[ Ni[LI... I1`,ISTIqL. L -i.'H[E S'¢E;TEf'I I1'.4 FIC:E:O[~'.[)F:II',ICE I.,.tlTH THE; CODE'-:::-;. :~:: :[ LII'-,I[)EF.':'2.;TFI1`-,I[:, TFLIFIT THE O1`,I.....'_-!;ll"E~ 'SE!4Ef;?. '?.!;'.,.'STI:i:H HFI"r' F.:E::6!I.J]:F?,E ENL'..Ffl:RG[H"IE:1`',FF ]:F:' THE!: F::ES I [:'[EI",ICE: :[ S [;.:EHODEL. E[) TO I i",ICLIJ[)E I'`1OF?E THRI",I :~: F:li.:: F I_~Jl CFINT ..~r ].' ["l NHEEL. IEE; ', MLJNI('.It~/',LITY Ot-: ANCIIORAGE c. ~,?,ttL~- DEPAR'I i',li:i~lT OF IIEAI.'FH ANI) E. PIVIRONMI~NTAL PFiOTECTION SOll. S LOG -- PERCOLATION TEST i.'ERF()r/ME D FOR: ........... 2 3 5 0 11 1 3 - 1 iS -. 1 ~i --I LEG,,",[ DESCi IPTI(;N:_ t ....... ' '' _ ...... SLOPE