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HomeMy WebLinkAboutT12N R3W SEC 24 N2SW4SW4SW4 PARCEL 21 T12N R3W SEC 24 N2 SW4 SW4 SW4 PARCEL 21 #015-242-13 Permit Number:OSP251382 Tax Code Number:01524213000 Work Type:WellSeptic Initial Effective Date: Design Engineer: Site Legal Address:T12N R3W SEC 24 N2SW4SW4SW4 PARCEL 21 G:2740 Owner:COOLEY SHAUN N Site Mailing Address:12231 HILLSIDE DR, Anchorage Lot Size in Sq Ft:201378 Total Bedrooms:3 This permit is for the construction of: Disposal Field Septic Tank Holding Tank Privy Non-Public Water Well Water Storage All construction shall 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 wastewater code requires inspections during the installation. The engineer shall notify the Development Services Department per AMC 15.65. Coodinate with On-Site staff regarding preferred method. 4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather shall be either: a. Opened and Closed on the same day, or b. Covered, sealed, and heated to prevent freezing 10/31/2025 10/31/2026 FORGE ENGINEERING Special Provisions: Documentation for the existing well shall be included with the permit closeout submittal. The existing well must comply with the minimum separation distance requirements specified in MOA 15.55.040. Expiration Date: þ þ ¨¨þ ¨ Issued To: Issued By: Date: Date: 10/31/2025 10/31/2025 FORGE ENGINEERING Isatou B Njie MUNICIPALITY OF ANCHORAGE On-Site Water & Wastewater Program PO Box 196650 4700 Elmore Road Anchorage, Alaska 99519-6650 Phone: (907) 343-7904 Fax: (907) 343-7997 http://www.muni.org/onsite On-Site Water & Wastewater System Permit APPLICATION IS FOR: APPLICATION IS AN: (Z all that apply) Disposal Field 0 Initial M Septic Tank M Upgrade 0 Holding Tank ❑ Renewal Privy 0 Well M Water Storage THIS APPLICATION INCLUDES A WAIVER REQUEST FOR: Distance: Permit/Rush Fees: 1 ?-2"OWaiver Fees: Date of Payment: t Date of Payment: Permit No.c Waiver No. May 2025 October 15, 2025 MOA Development Services, On-Site Water & Wastewater Program 4700 Elmore Rd Anchorage, AK 99507 Subject: T12N R3W SEC 24 N2SW4SW4SW4 Parcel 21 Septic system design Dear On-Site Services Engineer: The owner of the above lot has built a shop space on this lot and needs a septic system to serve it, so we are submitting this permit application for the construction of a new well and septic system. The attached site plan identifies the location of the home as well as the proposed well, septic location and alternate site. No conflicts exist between this proposed system and any other well or septic system, whether on this lot or adjacent lots. Much of the ground surface on this lot has been cut down and flattened by the homeowner. There are no slopes greater than 25% within 50 feet downslope of either the primary or alternate site. Contours are shown on the site plan showing the grade and direction of flow. Even though these contours are no longer on the property the proposed trench is still angled as to not go against them to prevent any issue with separation to impermeables. Stormwater drainage will not impact this septic system. The new trench will be constructed parallel to the slope as much as possible. Wells on this and adjacent lots are shown. The new system will be a minimum of 100’ from all wells and surface water, and more than 5’ away from the septic tank. The alternate site is located more than 6’ away. Please refer to the attached test hole log, plan and profile pages for the septic design. If this design is followed, there will be no adverse impacts to adjacent properties. Sincerely, Benjamin Schiller, PE Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251382, Isatou Njie, 10/31/25 LEGAL DESCRIPTION: PERFORMED FOR: DATE: PARCEL ID#: SOILS LOG AND PERCOLATION TEST 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 DEPTH (feet) TEST HOLE 1 DATE READING NET TIME (minutes) DEPTH to WATER NET DROP PERCOLATION RATE: (MIN/INCH) (inches)(inches) DATE OF MONITORING DEPTH TO WATER AFTER MONITORING <1 10/2/25 1 2 3 4 5 6SM (SILTY SAND) SEE MATERIAL TEST REPORT Professional Engineers Stamp: T12N R3W SEC 24 N2SW4SW4SW4 PARCEL 21 10/2/25 015-242-13 SHAUN COOLEY 93 8 160.5 Benjamin Schiller CE 12592REGISTEREDPROFESSION A L E N GINEER PERC TEST LOCATION TECHNICIAN: JUSTIN EARLS 99 8 16 NONE 10/9/25 COMMENTS: SITE PLAN 6 USCS SOIL CLASSIFICATION WAS VISUALLY DETERMINED EXCEPT WHERE NOTED. 10/10/25 MOISTURE NOTED AT TIME OF DIGGING?NO 93 8 160.5 99 8 16 6 93 8 160.5 99 8 16 6 93 8 160.5 99 8 16 6 93 8 160.5 99 8 16 6 93 8 160.5 99 8 16 6 Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251382, Isatou Njie, 10/31/25 T12N R3W SEC 24 N2SW4SW4SW4 PARCEL 21 TYPICAL TRENCH SECTION (NO SCALE) NOTES: 1. GRADE AREA OVER TRENCH TO DRAIN AWAY 2. PROVIDE 3' OF COVER OVER TRENCHES AND 4' OVER SEPTIC TANK, OR 2' WITH 2" OF INSULATION 3. CHECK GROUNDWATER AT TIME OF CONSTRUCTION. IF LEVEL IS HIGHER THAN PREVIOUSLY OBSERVED, CALL ENGINEER IMMEDIATELY Benjamin Schiller CE 12592REGISTEREDPROFESSION A L E N GINEER 4" PERFORATED PVC (HOLES DOWN) DRAINFIELD ROCK DESIGN FACTORS:SYSTEM REQUIREMENTS: 450 GPD PEAK FLOW PERK RATE: <1 MIN/IN APPLICATION RATE: 1.0 GPD/SF (CONSERVATIVE) 6.5' DEEP TRENCH SYSTEM 1000-GAL SEPTIC TANK BOTTOM OF TRENCH: 7.0' BELOW GRADE FLOW LINE ELEVATION: 0.5' BELOW GRADE 1.0 GPD / 450 GPD/SF / 6.5' DEEP / 2 SIDES) = 34.6 LF TRENCH REQUIRED (35.0 LF SPECIFIED) GEOTEXTILE FABRIC 10/10/25 3' 6'-6" 6" 3' ORIGINAL GRADE MAX 3:1 SLOPE, PROVIDE ADDITIONAL 6" TOPSOIL & GRASS SEED Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251382, Isatou Njie, 10/31/25 CO - CLEANOUT 2CO - DOUBLE CLEANOUT FCO - FOUNDATION CLEANOUT FD - FLOW DIVERTER VALVE MH - MANHOLE MT - MONITORING TUBE SV - SEPTIC VENT TH - TEST HOLE LEGEND 1"=40' T12N R3W SEC 24 N2SW4SW4SW4 PARCEL 21 FEET 0 40 80Benjamin Schiller CE 12592REGISTEREDPROFESSION A L E N GINEER 10/15/25 SEPTIC PLAN AREA FLATTENED BY HOMEOWNER, TRENCH WILL NOT GO INTO SLOPE. SYSTEM WILL NOT NEED TO BE PUMPED SHOP FCO TH#1 MTCO MT CO 1000-GAL SEPTIC TANK 35' LONG X 3' WIDE, 6.5' EFFECTIVE DEPTH TRENCH PROPOSED WELL TO SERVE SHOP 15' UTILITY EASEMENT WELL AND SEPTIC ON THE SOUTH SIDE OF THESE LOTS NO IMPACT ON PROPOSED WELL OR SEPTIC VACANT EXISTING WELL ALTERNATE SITE Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251382, Isatou Njie, 10/31/25 Report No: MAT:25-2013-1Issue No: 111301 Olive Lane, Anchorage, Alaska 99515 Client: The testing services reported herein have been performed to recognized industry standards and relate only to the items inspected. Unless otherwise noted, no other warranty is made.Should engineering interpretation be required, NGE-TFT will provide upon written request. This report shall not be reproduced in full, without the prior written approval of NGE-TFT. Andrew Fortt, Engineer, P.E.Reviewed By:10/6/2025Date: Project: Northern Geotechnical Engineering, Inc. - Material Test Report Terra Firma Testing Phone: (907) 344-5934 | www.nge-tft.com cc: Forge Engineering, Inc.7293-252025 Material Testing 97¾in 94½in 923/8in 1001½in 1006in1003in % PassingSieve Size Limits 67No.20 59No.40 54No.60 77No.10 88¼in 86No.4 48No.100 40No.200 Drying By:OvenDate Tested:10/6/2025 N2SW 45W 45W 4 Parcel Sample Details 25-2013-1Sample ID T12N R3WSEC24Location10/2/2025Date Sampled Atterberg Limit: Liquid Limit:Plastic Limit:Plasticity Index:Linear Shrinkage (%): Sample Description: Grading: Not Obtainable NP (Non-Plastic) NP (Non-Plastic) 4.4262D85:0.4454D60:0.1740D50:N/AD30:N/AD15:N/AD10:N/ACu:N/ACc: ASTM C136 Tested By:Amir Mack Particle Size Distribution Page 1 of 2© 2000-2025 QESTLab by SpectraQEST.comForm No: 18909, Report No: MAT:25-2013-1 mm µm 600 200 100 60 20 6 2 600 200 100 50 6"3" 1 1/2" 3/4" 1/2" 1/4" #4 #10 #20 #40 #60 #100 #200Sieve Size BOULDERS 0% COBBLES 0% GRAVEL (14%) COARSE 2.9% FINE 11.4% SAND (45%) COARSE 8.2% MEDIUM 18.0% FINE 19.0% SILT/CLAY 40% Diameter mm µm 600 200 100 60 20 6 2 600 200 100 50 6"3" 1 1/2" 3/4" 1/2" 1/4" #4 #10 #20 #40 #60 #100 #200Sieve Size BOULDERS 0% COBBLES 0% GRAVEL (14%) COARSE 2.9% FINE 11.4% SAND (45%) COARSE 8.2% MEDIUM 18.0% FINE 19.0% SILT/CLAY 40% 0 10 20 30 40 50 60 70 80 90 100 Pe r c e n t a g e P a s s i n g ( b y m a s s ) Report No: MAT:25-2013-1Issue No: 111301 Olive Lane, Anchorage, Alaska 99515 Client: The testing services reported herein have been performed to recognized industry standards and relate only to the items inspected. Unless otherwise noted, no other warranty is made.Should engineering interpretation be required, NGE-TFT will provide upon written request. This report shall not be reproduced in full, without the prior written approval of NGE-TFT. Andrew Fortt, Engineer, P.E.Reviewed By:10/6/2025Date: Project: Northern Geotechnical Engineering, Inc. - Material Test Report Terra Firma Testing Phone: (907) 344-5934 | www.nge-tft.com cc: Forge Engineering, Inc.7293-252025 Material Testing Sample Details Not Obtainable10/6/2025Nic CropperSilty sandSMGunner Bergstedt10/2/202513.2A N2SW 45W 45W 4 Parcel 25-2013-1Sample ID T12N R3WSEC24Location10/2/2025Date Sampled ResultCuASTM D2487 Other Test Results MethodDescription Limits CcProcedure ASTM C117Water Content (%)ASTM D2216Date TestedTested ByGroup Code ASTM D2487Group NameTested ByDate TestedLiquid Limit ASTM D4318 NP (Non-Plastic)Plastic Limit NP (Non-Plastic)Plasticity Index Nic CropperTested By 10/6/2025Date Tested Page 2 of 2© 2000-2025 QESTLab by SpectraQEST.comForm No: 18909, Report No: MAT:25-2013-1 Comments