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Home My WebLink AboutVALLI VUE ESTATES #2 BLK 5 LT 12 · Municipality of Anchorage Page 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 Permit Number: S~v~ ~1~ 0 ~2'~ PID Number: Name: Wastewater System: 't~(New [] Upgrade ~ICHAEL Address: 33~o ~RovI~ENcE b~tVE~ 4~c~, oD ABSORPTION FIELD iND. of~drooms: Phone: ~. ~ ~ Deep Trench ~ Shallow Trench ~Bed ~Mound ~Other LEGAL DESCRIPTION so,.~..o: ~,3 GPD/Sq. Ft, Total Depth from~i~inal grade: Subdivision: ~*~ Ft. 0'~ ~ Ft. LOt; ] ~ B~ock: ~ VALLt VUE~ ~ ~ Depth to pipe bottom from original grade: Gravel depth beneath pi e Townsh]~=~ . [ Range:3 ~ I Section: ~ ~ ~i,laddedaboveodginalgrade: Gravellength:~, WELL: EXiSTjN~New ~ Upgrade Gra~depth: I.O Ft. ~ ~ FL Classification (Private, A,B.C): Total Depth: Cased To: Total absorption area: Pipe materiah Driller: Date Drilled: StaticWaterLevek Installer: Yield:GPM J Pump Set at:. Ft, ICasing Height Ab°ye G r°und:Ft. TANK SEPARATION DISTANCES ~Septic ~ Holding ~ S.T.E.P. TO Septic Absorption Lift Holding Public/Private Manufacturer: Capacity in gallons: Fro~ Tank Field Statio. Tank Sewer Lines ~NC~WAGE Well ~OO~ ~OOI ~ ~ ~ ~Oo~ Material:~TE~ Number°fC°mpadments: Su.ace -- ' Water ~/OO' 7100' -- >~oo LIFT STATION .~. Lot I Size in gallons: J Manufacturer: CurtainDrain ~ ~ ~ ~ ~ Pump Make & Model Electrical Inspections performed by: Remarks: ~o~1 ~5o~ho~ &E~ ~ BENCH MARK Location and Description: $4u~ ~ ~r ~ f<~(~cem~4f ~t°P'~ec~n]col~er~ ENGINEER'S SEAL Inspections performed by: FLA~oP TECH ~VcS Dates: 1st ~/l~/ffl " ~'-- ' Department of Health and Human Services approval 72-O13 (1/91) MOA 25 ·Perm, itNo. ~14/cJlO J:Z~ Page 2 of ~ Municipality of Anchorage DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P.O. Box 196650 · Anchorage, Alaska 99519-6650 · Telephone: 343-4744 On-Site Wastewater Disposal System and/or Well Inspection Report LegalDescription: LI2jB~' V~Lll t/C"E~/-~:~2 PIDNo.: 0/~"12;~' 72q)13 A (2/91) MOA 25 CoN$~ TRE~ A $~. TANic js'~ C, 0. '~G~ 12, A~S. e,~=b N.W. co. 77' FJcttop Technical 14530 Echo Street ~[nchqrage, Alaska~ 9951~ ENG SEAL CE-3509 Iber~itNo. ~W'~JlO I;Z~ Page ~ 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 · Legal Description: L. 12., BE VALLI VCIE')'~2-. PID No.: ou"r,eT .~ Bo'rTO~ e F hiST. PiPE No Ho;:~o~'~Ac ScAL~ $ou'r~ e~F A~S. B6D ~SSuMeb ~LEV ~ I~.0 Flattop Technical Services 14530 Echo Street ~nchor6ge, A18sk¢ 99516 BoTTo/~ oF' Moth,TOe TJE¢ 72-013 A (2/91) MOA 25 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 PAGE 1 OF PERMIT NUMBER:SW910123 DESIGN ENGINEER:FLATTOP TECHNICAL SERVICES OWNER NAME:MANUEL MICHAEL D & OWNER ADDRESS:3340 PROVIDENCE DRIVE ANCHORAGE, ALASKA 99508 DATE ISSUED: 6/03/91 EXPIRATION DATE: 6/03/92 PARCEL ID:01512345 LEGAL DESCRIPTION: VALLI VUE ESTATES #2 BLK 5 L T 12 LOT SIZE: 54734 (SQ. FT.) NUMBER OF BEDROOMS: 4 THIS PERMIT: 4 THIS PERMIT IS FOR THE CONTRUCTION 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 (iSAACS0). 3. THE FOLLOWING SPECIAL PROVISIONS. 1 SPECIAL PROVISIONS RECEIVED BY: ISSUED BY: THEODORE F. MOORE, P.E. PH: (907) 345-1355 C~ & EN~ON~NT~ ENG~EER~G · ENERGY CONSERVA~ON & ~YS~ May 22, 1991 14S30 ECHO ST. ~CHORAGE, ~KA 99S16 M.O.A. DHHS P.O. Box 19-6650 Anchorage, AK 99519 Dear Sks: The purpose of this letter is to provide the required design narrative in support of our application for a permit to install a wastewater disposal system to serve a planned 4 bedroom residence on Lot 12, Block 5, Valli Vue Estates g2. Soils logs and design drawings are enclosed. The test hole locations and proposed configuration of the original and replacement systems are shown on the site plan. The soil absorption bed design is based on the measured perc rate of 3 minutes per inch, for wh{ch the wastewater ordinance specifies a design absorption rate of 0.8 gpm/day. Since a 4 bedroom residence can be expected to generate 4 x 150 = 600 gal.day of effluent, the required bed area is 600/0.8 = 750 square feet. This area can best be accomplished by a bed having dimensions of 20' x 37.5'. The lot is characterized by very irregular topography. The most feasible site for a soil absorption system is in the bottom of a deep swale just south of the proposed building site. Additional sites may be possible near the south end of the lot, but these would entail the use of a lift station and a long pressure line. Based on the soil test data, we were able m identify sufficient area in the swale for both the original and one replacement soil absorption bed. To best fit the systems within the confines of the swale, we have elected to use a bed width of 20 feet, instead of the 15 feet stipulated in the ordinance. The proposed site is in a depression surrounded on three sides by steep slopes of up to 40%. We monitored this site on several occasions during breakup, and determined that no surface water collected in the bottom. Nevertheless, to provide additional protection in our design, we have incorporated an impervious battier pm~t way down in the cover material to divert surface moisture away from the proposed bed. We have also specified that the fmal grading shall achieve a positive slope down out of the swale to the west. Valli Vue S)D]s served by a community water system, for which the well is more than 200 feet from the proposed project. Private wells on the lots to the north are more than 100 feet from the proposed system. No other wastewater disposal systems m'e within 100 feet. The proposed project will have no impact on wells or wastewater disposal systems on adjacent properties, nor will it have any impact on reserved space/surface and subsurface, or on drainage patterns. Sincerely, Ted Moore, P.E. Iqq' LoT LoT CE - 3589 · Flat~op ?ec~Dica! E{e~vice~ 14530 Echo Street Anchorage, Alaskc~ 995I$ BE VALLI VUE SEPT lC SYSTE Y~ SITE PLAN D~N B'f; ~ ~OTE; THIS I$ NoT A SoRv£¥~D P:A'~ ALt. L ocA'r mN~ PLA N VIEW sc,~,~: ,"--1o' DE PTJ~ SECT ION ^-A ~:A~-: ,'=~' !:'latfop Technical Services 14530 Echo Street Anchorage, Alaskcr 99516 L1'2,B5 VALLI VUE ~2 .SOIL ABSORPTION BED PLA~ ¢ CRo£s SECT~O~ SCALE: As HoTEb baT£ : 5'/~1 Flattop Technical Services 14530 Echo Street, Anchorage, AK 99516 Phone (907) 345-1355 Lot 127 Block 5, Valli Vue Estates ~r2 Crooked Tree Drive, Anchorage Wastewater disposal system installation Specifications 1.0 General: 1.1 The scope of the project includes the installation of a 1250 gallon septic tank followed by a 20' wide x 37.5 foot long soil absorption bed. 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 with Municipal and State requirements.. 1.3 All separation distances shall be in confmxnance with Municipal requirements, unless specifically waived. 2.0 Septic Tank: 2.1 The 1250 gallon septic tank shall be Municipally approved with a minimum of two compartments, and shall be set level on undisturbed soil. Each compartment shall be equipped with a watertight manhole cover and a 4" cleanout. If the tank is buried less than 4 feet, it shall be insulated with 2 inches of approved burial type, rigid insulation. 2.2 All pipe connections to the tank shall be equipped with waterproof mechanical couplings. The waste line from the residence to the septic tank shall have a minimum slope of 1/4'" per foot, and the waste fine between the tank and the soil absorption system shall have a minimum slope of 1/8" per foot. A cleanout shall be installed within 5 feet of the building foundation, and a double cleanout shall be installed within 5 feet downstream of the septic tank. 3.0 Soil absorption system: 3.1 The soil absorption system shall be constructed by removing the sm~face soils from the proposed 20' x 37.5' bed ar6a to a depth of approximately 7 feet below ground level to expose the native gravelly sand material. 3.2 The bottom of the soil absorption bed shall be level,. To achieve this it may be necessary to over- excavate some areas to remove the surficial soils, and to fill these areas with gravelly sand from other portions of the bed where the sand is encountered at a shallower depth. Any sand imported for leveling shall comply with Municipal specifications. 3.3 A total of 12 inches of sewer gravel shall be placed in the bottom of the excavation to create the soil absorption bed. Sewer gravel shall be 0.5" - 2.5" screened gravel, with less than 3% passing the #200 sieve. 3.4 Perforated and non-perforated distribution pipes shall be configured as shown on the design drawings. The distribution pipes shall be laid level, with the bottom of the pipes no less than 6 inches above the bottom of the sewer gravel. 3.5 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. 3.6 Approved filter fabric shall be placed over the entire top surface of the sewer gravel before backfill with inorganic soil. 3.7 When the bed has been backfilled to within approximately 2 feet of the final ground surface, the surface of the backfill shall be carefully graded to achieve a 5% slope down towards the outlet of the natural swale in which the bed is constructed. This same graded slope shall be maintained for at least 5 feet beyond the perimeter of the bed in all directions. A single sheet of 10 mil reinforced visquene shall then be placed covering this entire graded slope to provide an impervious barrier preventing surface moisture from percolating down into the soil absorption bed. The final 2 feet of backfill shall then be placed on top of the visquene barrier, with care being taken to ensure that the barrier is not damaged in the course of the backfill. 3.8 The top surface of the backfill material shall be raised 6 inches higher than the surrounding terrain to allow for subsequent settlement, and shall be graded to smooth contours. Additional mate~al shall be placed east of the soil absorption bed as necessary to ensure that the swale maintains a constant slope downwards to the west, with no resulting low spot. 4.0 Inspections: 4.1 A total of 6 engineering inspections will be required during the course of the project: (1) initial stakeout with the contractor to establish the location of the system and to discuss the plans, specifications and construction procedures, (2) after the native material has been excavated to expose the infiltrative surface, but prior to placement of any leveling sand, to ensure that the native material conforms with the soil test information, (3) after the level base of the soil absorption bed has been achieved, (4) 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 the filter fabric or backfill, (5) after the visquene battier has been installed on the intermediate graded backfill surface, and (6) after final 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 of the inspections with the engineer sufficiently fur in advance to ensure the availability of the engineer. PERFORMED FOR: Flattop Tec~nlcal Services 14530 Echo Street Anchorc~ge, Aic~skcr 9951R Municipality o! Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST LEGAL DESCRIPTION:J,. I~. J ~) ~ SM RI~DDISH 2 3 4 ML SANb~/ SILT 7 8 10 11 12 13 14 15- 16- 17- 18- 19- 20 COMMENTS VALLI VUE ~'2 Township, Range, Section: SEC SLOPE WAS GROUND WATER ENCOUNTERED? S L IF YES, AT WHAT O DEPTH? ~,A' p E Depth l0 Waler Alter .g//.//@ / Monitoring? ~'~' Date: SITE PLAN IL \ H,OUS E ~ \ ~ -- %5: ~ ~ 1.fl. ~z Reading Date Gross Net Depth to Net Time Time (.~ I~ Water Drop(~) ~O Z:qo~ 3o 23 ~ PERCOLATION RATE 2. J (minutes/inch) PERC HOLE DIAMETER ~l, ]ES7 RUN O[TWE[N _Jl.~' I~AND _ ]~Z.O FLATTOp ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: 72-008 (Rev. 4/85) PERFORMED FOR: Flattop TechniCs1 14530 Echo Street Anchoraqe, Alaska 9951a D~PA~ENT OF HEALTH & HUMAN SERVICES 825 L Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST MIKE HANDEL //MIKE MFN~E . DATE PERFORMED: LEGAL DESCRIPTION:L 1') d [~ '~ VALLI VL/E- ~2 Township, Range, Section: SEC Iq ,T 12J~ R 3~V' 1 2 3 4, 5- 6 7 8 9 10 11 VELL~ SILT PIANW (:OB~ LES 13- 14- 15- 16- 17 18 19 20 COMMENTS 5P F~NE SANb SLOPE SITE PLAN WAS GROUND WA FEFt ENCOUNTERED? ~ IF YES, AT WHAT Oeplh lo Wsler Aller Monitoring? ~¥ _____ Dale: IL 2°~, Reading Date Gross Net Depth to Net ~2"5o.~1~ g/m g:lg:qo 27 3/6' ~ 1{2. 0 3:27:20 27 t~?O 3:q0:2o 23 t~o 3.q~.o' ' o PERCOLATION RATE ~ {mmules/inch) PERC HOLE DiAMETER ] EST RUN BE1WEEN ~.0 FTAND ~.,~ ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: 72-008 (Rev. 4/85) PERFORMED FOR: ~'lattop Technical Service- ]4530 Echo Street Anchorage, Alas]~a 995] g Municipality of Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST MANu~t. / ~I~E LEGAL DESCRIPTION: 1 2 3 4, 5- 6- 7 8 9 10 11 12 13 14 16- 17- 18- 19- 20- COMMENTS P PT ~.~ V'ALLI %,/1/~- ~?-. Township, Range, Section: ~EC. SLOPE SP 5~ GRAVELL~ ~l LTx/' £AND oF CLEANER ~Aflb WAS GROUND WATER ENCOUNTERED? IF YES, AT WHAT DEPTN? Deplh 10 Water AJler Menlt0rlng? J 7 Bale: ..~Jl'TJ~l Iq ,TIZN. SITE PLAN Reading Date Gross Net Depth to Net Time Time Water Drop PERCOLATION RATE (m~nutes/inch) PERC HOLE DIAMETER __ TEST RUN BETWEEN _ FT AND __ FT ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE; 72-008 (Rev. 4/85) MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION 825 L, Street, Anchorage, Alaska 99501 264-4720 SOILS LOG - PERCOLATION TEST SOILS LOG PERCOLATION TEST PERFORMED FOR: LEGAL DESCRIPTION: 1 2. 3, 4- 5- 6- 7 8 9 P. o N sdoPE LOA~ LI& N'F 'N,,~' E. LL C~ V_A DE b CANt~ /4ND DATE PERFORMED: SITE PLAN 10 11 12 13 14 15 16 17 18 19 20- COMMENTS WASGROUNDWATER NO ENCOUNTERED? IF YES, AT WHAT DEPTH? S L O P E Gross Net Depth to Net Reading Date Time Time Water Drop PERCOLATION RATE TEST RUN BETWEEN FT AND (minutes/inch) I FT I 72-008 (6/79)