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HomeMy WebLinkAboutPARADISE VALLEY BLK 7 LT 20Par'adi Valley Block 7 Lot 2:0 #020-413-01 Municipality of Anchorage Development Services Department E u[Id'uxJ Safety Division On-Site Water and Wastewater Program, 4700 S. Bragaw St. P.O. Box Igg~§0 ~c~ora~e. AK 99519-~0 v, ww.ci, anchorage.a~.us (907) 3437904 Permit Number:. Page I of ON-SITE WASTEWATER DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT G"c4 e'lee Wastewater System: [] New [] Upgrade LEGAL DESCRIPTION " ' '7 ' ~ Fcu.,od, I,..~e ' Ma lie y Well: Nor '~o [] New [] Upgrade SEPARATION DISTANCES  Septic Absorption Lift Ho~ng Tank Field Station Tank ~'~" tod+ too'* - - ABSORPTION FIELD 5'. F,. 0 ;~ ~,. ~ ~'~ n. I ~ - ~t' ~7 F~ D- ~02'V TANK [] Septic I'-I Holding CI S.T.E.P. [] Other. V 2T. STAT,ON / \ ~' ~'1 BENCH MARK Inspections performed by: F:la~toT'ec4' Eu¢ Dates: 1'~ 2"* ~/z~ /~'Z. Development Services Department Approval Re,.,ie,,ved e. nd approved b~O'J~ Date: Engineer's Stamp PERMIT NO: SW020030 PAGE 2 OF 2 PID NO: 020~,13-01 SEPTIC 'B" AREA / #A# / ~/ ....................... . '~ ....................................... 1250-GALLON / ! .- "E '~EPT C TA"~ PROPOSED , . .~ ~ ; R ~0~ / ', , J SWING TIES: FROM: PROP. COR.'A" COR. TO: S.T.C.O. "C" 152' 81' S.T.C.O. "D" 152' 77' DBL. C.O. 'E" 153' 72' TR. C.O. "F" 162' 65' TR. M.T. 'G" 164' 69' TR. M.T. 'H" t70' t10' TR. C.O. "1" t69.5' 1t2' LOT 20, BLOCK 7 PARADISE VALLEY PLAN VIEW ..~ SCALE: 1" = 40' ~__ EXIST. WELL SOIL COVER BOT. T.H. #1 ,~E LEV. 76.8' M.T.DRY 9/19/02 4'+ SOIL COVER ..... INV. IN 1250-GALLON ' 91.6' 91.9' S ~p_T]~ .T?N..K .j; 68-FOOT LONG SOIL ABS. TRENCH w. 6.6' EFF. GRAVEL ELEV. 82.8' CROSS-SECTION NOT TO SCALE LOT 20, BLOCK 7, PARADISE VALLEY SID SEPTIC SYSTEM UPGRADE AS-BUILT INSPECTION REPORT FLATTOP TECHNICAL SERVICES 14530 ECIIO STREET ANCIIORAGE, ALASKA 99516 SCALE: AS NOTED DRAWN BY TFM OCTOBER, 2002 MUNICIPALITY OF ANCHORAGE Development Sen/ices Department On-Site Water & Wastewater Pmcjram 4700 South Bragaw Street P.O. Box 196650, Anchorage, AK 99519-6650 (907) 343-7904 ON-SITE WASTEWATER DISPOSAL SYSTEM I WATER SUPPLY PERMIT Initial Date Issued: Feb 26, 2002 Expiration Date: Feb 26, 2003 Permit Number: SW020030 ~'~Legal Description: PARADISE VALLEY BLK 7 LT 20 Design Engineer;. 0019 Flattop Technical Services Owner Name: VALERIE PHELPS I PETER BURKE OwnerAddress: NHN SPAIN DRIVE · ANCHORAGE, AK 99516- Parcel ID: 020-413-01 Site Address: Lot Size: 27345 SQ. FT. Total Bedrooms: 4 Permit Bedrooms: 4 This permit is for the construction of.. [] Disposal Field [] Septic Tank [] 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 DSD at least 2 hours prior to each inspection. Provide notification by calling (907) 343-7904 ( 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: Issued By: Municipality of Anchorage Development Services Department Building Safety Division On-Site Water and Wastewater Program 4700 South Bragaw St. P.O. Box 196650 Anchorage. AK 99519-6650 www.ci.anchorage.ak.us (907) 343-7904 ON-SITE SEWER/VVELL PERMIT APPLICATION FOR A SINGLE FAMILY DWELLING Parcel I.D. 0~. 0 -415 ..- Ol Permit Number SwOZOO,~O Mailing address (1) P.O. ~o~ Iq Ioo5" Mailing address (2) /~'~ ~'~'~'~'~' ~ Legal description (Lot. Block & Sub'd.) Lc, {' ~ / Legal description (Section. Township & Range) Lot Size 2 ~+k- Acres/Sq,Ft. THIS APPLICATION IS FOR: Sewer Only Sewer and Well Sewer Upgrade THIS PROPERTY CONTAINS: Hot Tub Swimming Pool Therapy Pool Day phone ~ '? ¥- / ¥ q~ Zip Code Number of Bedrooms ~'~ [] Well Only [] [~ Water Storage [] Jacuzzi Water Softening Unit 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 Fees: 'y~C, '~I~'0 ----~=~g"5'-(:~ Date of Payment: ~'~/15'/~' ~_ Receipt Number: ~) ! ~ / '~, ~ (Rev. 12/00) Waiver Fees: Date of Payment: Receipt Number: TtlEODORE F. MOORE, P.E. PII: (907) 545-1555 ~:~¥'% ~. ~,.,~;~ ~ ~. ;..~.~,, F T,OP TECHNIGA.L e~ & EN~ON~NT~ ENG~E~G * ENERGY eONSERVA~ON 14550 ECHO ~CHO~GE, Feb~ 15, 2002 M.O.A. DSD P.O. Box 19-6650 Anchorage, AK 99519 Dear Sirs: The purpose of this letter is to provide the required design narrative in support ofour application for a permit to construct wastewater disposal facilities on Lot 20, Block 7, Paradise Valley S/D, located at 18,000 Spain Drive. A soils log, pete test results, a site plan, design drawings and specifications are enclosed for your review. The proposed system will be constructed in the vicinity of test hole # 1. As can be seen from the soil log, the native material between 6 and 12 feet below ground level is a somewhat silty sandy gravel with a measured pere rate ofless than one minute per inch. Despite the high measured pere rate, the design is based on 0.8 gpd/sq, fL to allow for possible variation within the stratum. The underlying sandy silt stratum should provide adequate filtration so that there is no need for an imported sand filter. Using a soil application rate of 0.8 gpd/sq, fL, this proposed 4-bedroom residence requires a total absorption area of(4 x 150)/0.8 = 750 square feet. The proposed 63-foot long trench design with an effective gravel thickness of 6 feet has a total absorption area of 756 square feet. The topography of the lot in the area of proposed construction is nearly level, with a 25% downward slope beginning about 15-feet to the west. A site for a similarly configured replacement trench is designated on the site plan. 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. LOT 10, BLOCK 2 KENO HILLS S/D ~6 ' / , ,,' PARADISEVALLET,? -- /' · ,,,,;,~ r ,' REPL TRENCH ,, CONSTRUCT 63-FOOT LONG SOIL ABSORPTION TRENCH W. 6.0 FEET EFFECTIVE BETW. 6.0' AND t2.0' B.G.L EXISTING SEPTIC SYSTEM IN THIS AREA INSTALL 1250-GALLON ~ROP.- DRIVE ' ' \ TEST HOLE #1 MON. TUBE ", I PROPOSED ! LOT 20, BLOCK 7, PARADISE VALLEY S/D PROPOSED WELL AND SEPTIC SYSTEM SITE PLAN FLATTOP TECIINICAL SERVICES 14530 ECIIO STREET ANCI IOP, AGE, ALASKA 99516 I INCH = 40 FEET DRAWN BY TFM FEBRUARY, 2002 NOTE: THIS IS NOTA SURVEYED PLAT. ALL LOCATIONS SHOWN ARE APPROXIMATE. 4O 63-FOOT LONG SOIL ABS. TRENCH W. 6.0 FEET EFFECTIVE GRAVEL BETW. 6.0 AND 12.0 FEET B.G.L. // / "A" 4" DIA. ASTM F~10 PERF. PIPE 4" Db~ ASTM 13-3034 NON-PERF. PIPE /~MONITORTUBE DOUBLE C.O. 1250-GALLO~ __ SEPTIC TANK PLAN VIEW SCALE: 1" -- 10' 4" D-3034 WASTE LINE FROM HOUSE MONITOR TUBE ~. MOUND BACKFILL6"-~ ,. / CLEANOUT ORIGINAL GROUND FILTER FABRIC 4" DIA F-810 PERF. PIPE 1Z - 2 1/2" SEWER GVL BOTTOM OF EXCAVATION CROSS-SECTION "A" - "A" SCALE: 1" = 5' LOT 20, BLOCK 7, PARADISE VALLEY S/D SEPTIC SYSTEM INSTALLATION PLAN AND CROSS-SECTION FLATTOP TEC!/NICAL SERVICES SCALE: AS SI [OWN 14,530 ECtlO STREET DRAWN BY: TFM ANCIIORAGE, AK, 99516 FEBRUARY, 2002 18.25' J TESTHOLE# ! J FLATTOP TECHNICAL SERVICES 14530 ECHO ST. ANCHORAGE, ALASKA 99516 SOILS LOG -- PERCOLATION TEST LEGAL DESCRIPTION: Lot 20, Block 7. Paradise Valley DATE PERFORMED: January 28, 2002 PERFORMED FOR; 1-- Valcde Phelps_& Peter Burke Pt. SM Reddish gravel~yloam GM/ML Gray sit[y gravel GM Gray sandy silty gravel Dense, dry, unconsolidated GP/GM Somewhat silty sandy gravel Predominan~ clean material More cobbies end boulders in lower poffion of stratum SLOPE Depth to Groundwater Date No Groundwater 1/28i02 'M ~'~R~'Ftu~d ry 2/4102-- :,~,~ ..' ~ '~-: ,n OTH ~ . . CE-3589 ¥;'t. ".. ..' "~ <' , ........ SITE PLAN ..... \- q. #1 W~LL 9 MUSM Gravelly sandy silt Clock Net Time Percometer Net Drop SOft upper 2 feet Date Reading Time (minute~) Reading (inches) Ina'e asing/y dense ~ dep~ 1/28 5~gallon presoak 12:17:00 20 1/2" Perc hole dr'/ 12:24 7 5 118 5 gallon resoak 12:25:05 21 318 #1 1~26¥o5 I 1~-~/e 3 Perc hope drY 12:35:00 10 6 B.H. (No bedrock seen) 19-- 20- PERCOLATION RATE <<1 (minute~inch) PERC HOLE DIAMETER 8" TEST RUN BE'~/EEN 7.25' FT AND 7.75' FT Bee note in comments, below COM MEN'TS: During perc test, steady add,don of 10 galtons of water into perc test hope st 5 gpm resulted in ma~mum water depth of 6". Due to rapid absorption rate, could not obtain fu~l IZ' pre-soak or even 8" deptfl for start of normal perc test, but did prove rapid perc rate, PERFORMED BY FLA'I'rOP TECHNICAL SERVICES. I '~,.~ ~ CERTiFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE wrrH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: ~.. ~' d,,~" [ ~_00 ~ q:lattop Tec~nkalServices 14530 Bc~o Street, Anchorage, AK 99516 P~one (907) 345-1355 Lot 20, Block 7, Paradise Valley S/D 18,000 Spain Drive Wastewater disposal system installation Specifications 1.0 General: 1.1 The scope ofthe project consistsofinstallinga 1250-gallonseptic tank that discharges into a 63-foot long soil absorption trench containing 6.5 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 new 1250-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. 2.2 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 I/4" per foot, and the waste line between the tank and the soil absorption system shall have a minimum slope of 1/8' per foot. A cleanout shall be installed within 1-4 feet of the building foundation, and a double cleanout shall be installed within 5 feet downstream ofthe septic tank. 3.0 Soil absorption system: 3.1 The soil absorption system shall be constructed by excavating a 63-foot long trench to a total depth of 12 feet below ground level in the location deslgnated on the site plan. The long axis ofthe trench shall follow a natural contour of the land. 3.2 The bottom ofthe excavation shall be level. Any compacted or smeared surfaces shall be raked to allow proper infiltration. 3.3 A total of 6.5 feet of approved sewer gravel shall be placed in the bottom of the excavation with the perforated distribution pipes laid level such that the pipe inverts are no less than 6.0 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 ofthe 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. If the soil cover thickness is less than 3 feet, two inches ofrigid, 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 ofthe 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 afier the backfill material has stabilized, and for placement of adequate topsoil and seed to promote rapid revegetation of all areas disturbed by the construction. 4.0 Inspections: 4.1 A minimum of 4 engineering inspections will be required during the course of the project: (I) initial stakeout with the contractor to establish the location of the system and to discuss the plans, specifications and construction procedures, (2) afier 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) afier 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 of the inspections with the engineer sufficiently far in advance to ensure the availability of the engineer.