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HomeMy WebLinkAboutROCKHILL BLK 2 LT 16 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: £Cc~ ? 7 C/O ( 5'- PID Number: Name:~[.~ ~ ~ ~ / ~/~ ~ Wastewater System: ~ New ~ Upgrade Address: ~z/y~ ~~ ~,~ ~., ~ ABSORPTION FIELD No. of Bedrooms: Phone: ~_~ ~ ~ Deep Trench D Shallow Trench DBed DMound ~Other LEGAL DESCRIPTION so, Rating: Total Depth from original grade: /, ~ GPD/Sq. Ft. I ~. ~' Subdiv~ion: Depth to pipe boEom from original grade: Gravel depth beneath pipe Lot: I~ Block: ~ R ~ h,'~J ~. ~ Ft. ~ ~- Et. Township: Range: ~ Section: Fill added above original grade: Gravel length: I ~ '~ Ft. E~ Ft. WELL: ~ New ~ Upgrade Gravel width: Number of lines: Distance betweenlines: ~ Ft. J ~ Ft. Classification (Private, A,B,C): Total Depth: Cased To: Total absorption area: Pipe material: P~ ~ Ft. ~ Ft. ~ SQ. Ft. ~ -~0~ Driller: Date Drilled: Static Water Level: Installer: Date installed: ~1~/~ E ~/7/?7 ~ Ft. Yield: ~ GPM Pump Set at: Ft. Casing Height(~tAbove~Gr0und:Ft. TANK SEPARATION DISTANCES a s~ptic ~ Ho~aing ~ S.T.~.P. TO Septic Absorption Lift Holding ~ublic/Private Manufacturer: Capacity in gallons: From Tank Field Station Tank SewerLines ~ C40~?~ ~ ~ I ~'~0 Waif I~' /~-~ ~ -- ~ Material: ~( Number °f C°mpa~ments: Sudace Water > ~O~ >~OO - -- LIFT STATION Lot Size in gallons: ~ Manufacturer: Line ~0 ' 1 ~ ~ -- - I Foundation J~ ~7 _ _ _ "Pump °n" level at: I "Pump °fi" level at: I High water alarm at: Cu~ainDrain ..... Pump Make & Model Electrical Inspections pedormed by: Remarks: ~c~f/ ~ ~ ~/ BENCH MARK Location and Description: Assumed Elevation: ENGINEER'S SEAL Inspectionspo~ormod by: Fl~k~ T~c$ ~c Datos: 1st ~/z/~ · ~ . Department of Health and Human Se~ices approval ~g~, Reviewed and approved by: 7~ ~. ~ Date: D.zt .q? ~ 72-013 (Rev. 9/91) MOA 25 PERMIT NO: SW970015 PAGE 2 OF 3 PID NO: 01536228 LOT '16 BLOCK 2 " .... ~" "F" T.H. 1250 GALLON SEPTIC TANK SWING TIES: FROM: COR."A" COR."B" COR."C" ,TO: S.T.C.G. "D" 16.5' 38' S.T.C.G. "E" 20' 43' DBL. C.G. "F" 22' 44' TR. C.O. "G" 52' 39' TR. M.T. "H" 54' 46.5' TR. C.O. "1" 64' 67' L. 16, BLK. 2, ROCK HILL SID SEPTIC SYSTEM CONST. AS-BUILT PLAN VIEW FLATTOP TECHNICAL SERVICES SCALE: 1"= 30' 14530 ECHO STREET DRAWN BY TFM ANCHORAGE, ALASKA 99516 AUGUST, 1997 PERMIT NO: SW970015 PID NO: 01536228 INV. ~ 90.4' 1250 GALLON SEPTIC TANK INV. 90.2' INV. 80.9' PAGE 3 OF 3 LONG SOIL ABS. TRENCH 7.5' SEWER GVL. BELOW PIPE BOTTOM TRENCH ELEV. BOTTOM T.H. f¢'2 ELEV. 67.4' M.T. DRY 5~2~97 L. 16, BLK. 2, ROCK HILL SlD SEPTIC SYSTEM CONST. i AS-BUILT PROFILE FLATTOP TECHNICAL SERVICES NOT TO SCALE 14530 ECHO STREET DRAWN BY TFM ANCHORAGE, ALASKA 99516 AUGUST, 1997 RECEIVED MAY 20 1997 LOCATION OF WELL Municipality of Anchorage BOROUGH I SUBDIVI~IOIq I LOT / BLOCK I ~ECTION QTI~q LOCATION/SKETCH: DEPTHS MEASURED FROM:r-lcasing top r-lground surface Depth From To BOREHOLE DATA: Material Type and Color STATE OF ALASKA DEPARTMENT OF NATURAL RESOURCES DIVISION OF WATER WATER WELL RECORD SECTION TOWNSHIP []s WELL DEPTH: Depth of hole: ~"(~ .ft Depth of casing: ~-~,7 ..ft MERIDIAN DATE OF COMPLETION ._~ / ? ./~'7 DEPTH TO STATIC WATER LEVEL: ft below '~,top of casino Dat~: ~ / "~7 / ?~ I-I ground surface METHOD OF DRILLING: ~air rotary [] cable tool [] other USE OF WELL: r~'domestic [] irrigation [~ monitor I-1 public supply [] other CASING STICK-UP: ~ ft. Diam: ~ in. to C/O ft Casing type: ~-~,'/ ~ in. to ~ ft WELL INTAKE OPENING TYPE: [] open end [] screened ~perforated [] open hole Depths of openings: ~ 3 to ~:~ ~--~ ft SCREEN TYPE: Diam: in. SloUMesh Size: Length: ft GRAVEL PACK TYPE: used: D~.p~h to top: . Volume .~, ~-~- ~,~) .. ~ .,/~._. ~.,.,_~..., GROUT TYPE: q~~olum~: Depth: from ft to ft Duration: PUMPING LEVEL AND YIELD: ~ ft after ~ hfs pumping ~ gpm PUMP INTAKE DEPTH; ~ ft Horsepower: WELL DISINFECTED UPON COMPLETION? ~..YES [] NO CONTRACTOR INFORMATION: REMARKS: PLEASE MAIL WHITE COPY OF LOG TO: DNRIDIVISlON OF WATER PO BOX 772116 EAGLE RIVER AK 99577-2116= PAGE 1 OF 1 MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND HUM_AN SERVICES P.O. BOX 196650, 825 "L" STREET, ROOM 502 ANCHORAGE, ALASKA 99519-6650 ON-SITE WELL AND WASTEWATER DISPOSAL SYSTEM PERMIT PERMIT NUMBER:SW970015 DESIGN ENGINEER:FLATTOP TECHNICAL SERVICES OWNER N]LME:SLAiViA BRAD T & CAROL D OWNER ADDRESS:12148 WOODCHASE CIR. ANCHORAGE, AK. 99516 DATE ISSUED: 2/05/97 EXPIRATION DATE: 2/05/98 PARCEL ID:01536228 LEGAL DESCRIPTION: ROCKHILL BLK 2 LT 16 LOT SIZE: 52124 (SQ. FT.) NUMBER OF BEDROOMS: 4 THIS PERMIT: 4 THIS PERMIT IS FOR THE CONSTRUCTION OF: DISPOSAL FIELD /SEPTIC TANK / WELL 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: CONSTRUCT ABSORPTION TRENCH DOWN GRADIENT OF 25% SLOPE. RECEIVED BY: , ~'~'~ Id~ ISSUED BY: DATE: DATE: CIVIL & ENVIRONMENTAL ENGINEERING * ENERGY CONSERVATION & ANALYSIS THEODORE F. MOORE, P.E. 14530 ECHO ST. PH: (907) 345-1355 January 28, 1997 ANCHORAGE, ALASKA 99516 M.O.A. DHHS P.O. Box 19-6650 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 construct wastewater disposal facilities on Lot 16, Block 2, Rockhill S/D, located on Limestone Circle. Soils logs, perc 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 # 2. As can be seen from the soil log, the native material between 5 feet and 18.5 feet is a slightly silty gravelly sand with a measured perc rate of less than one minute per inch. Despite the fast percolation rate, no additional filter sand should be required because the native soil is already classified as sand. Using the soil application rate of 1.2 gpd/sq. ft. specified in the wastewater ordinance, this proposed 4 bedroom residence requires a total absorption area of (4 x 150)/1.2 = 500 square feet. The proposed 40 foot long trench design with 7.5 feet of effective gravel depth has a total absorption area of 600 square feet. The topography of the lot in the vicinity of the propose construction slopes downwards towards the east at approximately 2%. Because of the large lot sizes in this subdivision, 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. , SEPTIC , SYSTEM LOT 15 ', " LOT 12 J ~ . '~ / c~ , /? /.-- / /~O' /..-' / ~RP OPOSED /~ ,~-, #2 ', ~ .~ ,/' / ~'~ ~ 40' LONG ~/~ // ', ,7 / ~~~'," --REPLACEMENT _~ / ~ /o~' / ". o o L' TRENCH , / ~ ~ ~ .................. ', ACRES / /~ ~ WELL SITE / , '. _.. ~ LOT 3A ~ ~ ~ ~ LOT 17 ~ ,, MARY~N D PROP, WELL AND SEPTIC SYSTEM T.H. SITE PLAN BYTFM NOTE: THIS IS NOT A SURVEYED P~T. ALL LOCATIONS SHOWN ARE APPROXIMATE.  ~ SEPTIC TANK DS,.C.O. \ I M.T. ~ ,,m~,, 4" DIA. Fi810 PLAN VIEW SCALE: 1" = 10'- 0" MONITOR TUBE 3 1I -- MOUND BACKFILL 12" FABRIC F-810 PERF. DIST. PIPE 1/2" SEWER GRAVEL BOTTOM OF TRENCH SECTION "A - A" SCALE: 1" = 5' - 0" LOT 16, BLOCK 2, ROCKHILL S/D PROPOSED SEPTIC SYSTEM PLAN AND CROSS-SECTION FLATTOP TECHNICAL SERVICES SCALE: AS SHOWN 14530 ECHO STREET DRAWN BY: TFM ANCHORAGE, AK, 99516 JANUARY, 1997 Flattop Techn~al Serv~es 14530 Echo Street, Anchorage, AK99516 Phone (907) 345-1355 Lot 16, Block 2, Rockhill S/D Limestone Circle Wastewater disposal system installation Specifications 1.0 General: 1.1 The scope of the project consists of installation of a 1250 gallon septic tank followed by 40 lineal feet of soil absorption trench containing a total of 8 feet of sewer gravel. 1.2 Construction shall be as depicted on the approved site plan and design drawings. Minor deviations from these ch'awings may be allowed or required by the engineer conducting the inspections. All construction procedures and material specifications shall conform With Municipal and State requirements. Ail 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 compamnent 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 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 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 excavating a 40 foot long trench to a total depth of 12.5 feet below the natural ground surface in the vicinity of test hole #2. 3.2 The bottom of the excavation shall be level. Any compacted or smeared surfaces shall be raked to allow proper infiltration. Sand for leveling or serving as filter material shall comply with Municipal specifications. 3.3 A total of 8.0 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 7.5 feet above the bottom of the 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 ~s to be placed over the filter fabric. If the 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 12 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 backf'fll 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: (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 to ensure that it is level and at the right elevation, and cmfforms 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 of the inspections with the engineer sufficiently far in advance to ensure the availability of the engineer. TEST HOLE # 1 FLATTOP TECHNICAL SERVICES 14530 ECHO ST. ANCHORAGE, ALASKA 99516 SOILS LOG -- PERCOLATION TEST LEGAL DESCRIPTION: Lot 16, Block 2, Rockhill S/D DATE PERFORMED: October 1, 1996 PERFORMED FOR: DEPTH (feet) Pt. Brad and Carol Slama SM Reddish sandy loam SP Slightly silty gravelly sand SLOPE SITE PLAN Depth to Groundwater Date No groundwater 10/1/96 Monitor tube dry 10/9/96 ML/SM Gray silt lenses intermingled w. lenses of sand Clock Net Time Percomotar Net Drop Date Reading Time (minutes) Reading (inches) 10/1 12" presoak Add water & start 4:53:55 23 3/8 #1 4:54:55 1 21 11/16 1 11/16 Add water 4:55:10 23 5/8 ~'2 4:56:10 1 22 1 5/8 Add water 4:56:25 23 11/16 #3 4:57:25 1 21 7/8 1 13/16 Add water 4;57:45 23 5/8 #4 4:58:45 1 21 15/16 1 11/16 PERCOLATION RATE <1 (minutes/inch) PERC HOLE DIAMETER $,, TEST RUN BETWEEN 7.0 FTAND 7.5 FT COMMENTS: 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: TEST HOLE LEGAL DESCRIPTION: DATE PERFORMED: PERFORMED FOR: DEPTH (feet) 1 COMMENTS: FLATTOP TECHNICAL SERVICES 14530 ECHO ST. ANCHORAGE, ALASKA 99516 SOILS LOG -- PERCOLATION TEST Lot 16, Block 2, Rockhill S/D October 1, 1996 Brad and Carol Slama Pt SM Reddish sandy leant SP Slightly silty gravelly sand SLOPE Depth to Groundwater Date No ~roundwater 10/1/96 Monitor mba dry 10/9/96 SITE PLAN O, .... : ..... : ..... : ..... : ..... : ..... : ..... :' ",,,.': ..... :'"~ Ct) Clock Net Time Percomator Net Drop Date Reading Time (minutes) Reading (inches) 10/1 19" Pre,oak Add water & ~mrt 4:42:20 23 3/8 #1 4:43:2U 1 19 1/2 3 7/8 Add water 4:43:30 23 3/8 ~2 4:44:30 1 19 5/8 3 3/4 Add water 4:44:43 23 3/8 #3 4:45:43 1 19 1/4 4 1/8 PERCOLATION RATE <<1 (minutes/inch) PERC HOLE DIAMETER 8" TEST RUN BETWEEN 6.5 FTAND 7.0 FT Despite the fast perc rate no additional sand filter should be required because the native material is sand. PERFORMED BY FLATTOP TECHNICAL SERVICES. I,,,--r" ,~ ~,/_.~ ~ ~ CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: [ ~ //8 / c~ ~'