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HomeMy WebLinkAboutSLEEPY HOLLOW #1 BLK 1 LT 4A1Block 1 t;AJMUj�.7MbMW,AN 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 Permit Number: OSP251278 Work Type: WellSeptic Initial Tax Code Number: 05150147000 Site Legal Address: SLEEPY HOLLOW #1 BLK 1 LT 4A1 GA 160 Site Mailing Address: 19022 MOUNTAIN RD, Chugiak Owner: CHUGIAK MOUNTAIN L4 TRUST Design Engineer: AK BUILT CONSTRUCTION & DESIGN LLC^ This permit is for the construction of: Effective Date: Expiration Date: Lot Size in Sq Ft: Total Bedrooms: 8/5/2025 8/5/2026 55480 Q Disposal Field Q Septic Tank ❑ Holding Tank ❑ Privy Q Private 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. Provide notification by calling (907) 343-7904 (24/7). 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 Received By: Issued By: Date: Date: t ON -SITE SEPTIC/WELL PERMIT APPLICATION Parcel I.D. Property owner(s) Peter Carpenter Mailing address Day phone 9078548404 18536 Culross Cir, Eagle River, AK 99577 Site address TBD Legal description Sleepy Hollow #1 Block 1 Lot 4A1 Number of Bedrooms 5 Engineering Firm AK Built Construction & Design, LLC Building Permit Number R252733 Not Applicable R APPLICATION IS FOR: APPLICATION IS AN: (X all that apply) Disposal Field F] Initial 0 Septic Tank El Upgrade E71 Holding Tank 171 Renewal ❑ Privy ❑ Well Water Storage ❑ THIS APPLICATION INCLUDES A WAIVER REQUEST FOR: Distance: N/A Permit/Rush Fees: _'/ I _J Waiver Fees: Date of Payment: Date of Payment: Permit No. Waiver No. May 2025 PO Box 771203, Eagle River, AK 99577 – Phone: (907) 854-9115 Page 1 of 2 AK Built Construction & Design, LLC General Contracting - Engineering - Project Administration July 31, 2025 Municipality of Anchorage Development Services Department On-Site Water and Wastewater Section PO Box 196650 Anchorage, AK 99519 RE: Sleepy Hollow #1 Block 1 Lot 4A1 – Septic System & Well Construction A permit is requested to install a conventional septic tank and soil absorption system, as well as a private well, for the subject property. The proposed system will serve a proposed 5-bedroom, single-family home. This design is for a 5-bedroom structure. Wells The subject property is not currently served by a water well. Neighboring parcels are served by private water wells. There are no wells within 100’ of the designed septic system. Soils AK Built Construction & Design, LLC (AK Built) is utilizing a soils report performed by Forge Engineering. A test hole, percolation test, and groundwater monitoring occurred on June 19th, 2025. Soils are classified as silty sand (SM) with gravel. Groundwater was not encountered in TH-01 (18’ BGS). Groundwater was observed at least seven (7) days later and confirmed to be absent. AK Built inspected the test hole for groundwater on July 31st, 2025, and confirmed the absence of water. The percolation rate in TH-01 was 0.46 minutes per inch. An application rate of 1.2 gallons/day/square feet shall be used for a conventional wastewater system. Wastewater disposal systems The designed wastewater disposal system is a deep trench system with 96” of sewer rock below the pipe invert. The designed system has the following characteristics. # Bedrooms: 5 Daily Design Flow: 750 gallons/day Tank Size: 1,500 gallons minimum Percolation Rate: 0.46 minute/inch Soil Rating: 1.2 gallons/day/square feet Field Area Required: 625 square feet System Type: Deep Trench Width: Bucket Width Minimum Length: 39.1 feet Designed Length: 40 feet Designed Field Area: 640 square feet Maximum Excavation Depth (from existing ground) Allowed: 12 feet Replacement wastewater disposal systems Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251278, Curtis Townsend, 08/05/25 PO Box 771203, Eagle River, AK 99577 – Phone: (907) 854-9115 Page 2 of 2 AK Built Construction & Design, LLC General Contracting - Engineering - Project Administration A replacement wastewater disposal system design is provided for the subject parcel. The replacement wastewater disposal system is a deep trench system with 96” of sewer rock below the pipe invert. The designed system has the following characteristics. # Bedrooms: 5 Daily Design Flow: 750 gallons/day Tank Size: 1,500 gallons minimum Percolation Rate: 0.46 minute/inch Soil Rating: 1.2 gallons/day/square feet Field Area Required: 625 square feet System Type: Deep Trench Width: Bucket Width Minimum Length: 39.1 feet Designed Length: 40 feet Designed Field Area: 640 square feet Maximum Excavation Depth (from existing ground) Allowed: 12 feet Existing disposal site There is no existing disposal site located on the subject parcel. Neighboring parcels with existing disposal sites do not impact the subject parcel and the proposed system will not negatively impact neighboring parcels. Drainage There is no surface water located within 100’ of the designed system. Topography The designed system is located west of center along the east-west orientation of the property and south of center along the north-south orientation of the property. The surrounding property slopes up-gradient to the northwest and slopes down-gradient to the southeast. Steep slopes exist at least 50-feet from the designed system, as shown in the plans. The proposed deep trench system is installed on a slope less than twenty-five percent. Final grading of the deep trench system shall be at a slope not greater than a 3H:1V (33%). The designed system does not have probable adverse impacts to adjacent properties. If you have any questions, please contact me. Sincerely, Robert Colles, PE AK Built Construction & Design, LLC Project Manager/Managing Member 907-854-9115 rlcolles@akbuilt.net 8/1/2025 W W TH W PROPOSED 5-BEDROOM HOUSE PROPOSED GARAGE GRA V E L D R I V EW A Y MO UTAI N DR I VE TH-01 COORDINATE BUILDING SEWER CONNECTION WITH HOME CONSTRUCTION BUILDING FOUNDATION CLEANOUT 1,500-GAL SEPTIC TANK DCO CO MT CO MT 40' LONG DEEP TRENCH W/ 8' EFFECTIVE DEPTH 50' TO STEEP SLOPE LAWN CONSTRUCTION AT TIME OF HOME BUILD PROPOSED PRIVATE WELL R100' R100' R100' 20 ' D R A IN A G E E AS E ME NT 10 ' U T I L I T Y E A S E M E N T 20 ' A C C E S S & U T I L I T Y EA S E M E N T 20 ' A C C E S S & U T I L I T Y EA S E M E N T SLEEPY HOLLOW #1 BLOCK 1 LOT 4A1 SUE TAWN ESTATE #2 BLOCK 1 LOT 11A SUE TAWN ESTATE #2 BLOCK 1 LOT 12 SUE TAWN ESTATE #2 BLOCK 1 LOT 10 SLEEPY HOLLOW #1 BLOCK 1 LOT 6 EXISTING SEPTIC SYSTEM EXISTING SEPTIC SYSTEM SLEEPY HOLLOW #1 BLOCK 2 LOT 5 SLEEPY HOLLOW #1 BLOCK 2 LOT 4 RESERVE FIELD 40' x 8' DEEP TRENCH 16' 66 0 67 0 680 690 70 0 710 72 0 72 0 730 7 3 0 740 74 0 75 0 750 680 6 9 0 70 0 7 1 0 7 2 0 73 0 74 0 74 0 1 SITE PLAN FI L E P A T H : C : \ U s e r s \ c o l l e \ O n e D r i v e - A K B u i l t C o n s t r u c t i o n & D e s i g n \ A K B u i l t \ P r o j e c t s \ 0 0 7 7 . 0 1 1 9 1 2 2 M o u n t a i n D r i v e S e p t i c C A R P E N T E R \ A C A D \ 0 0 7 7 . 0 1 - S i t e . d w g PL O T D A T E : 8 / 1 / 2 0 2 5 AK BUILT CONSTRUCTION & DESIGN, LLC PO BOX 771203 EAGLE RIVER, AK 99577 (907)854-9115 CERTIFICATE OF AUTHORIZATION #204451 SL E E P Y H O L L O W # 1 BL O C K 1 L O T 4 A 1 NH N M O U N T A I N D R I V E EA G L E R I V E R , A K 9 9 5 7 7 PR O J E C T N O : 0 0 7 7 . 0 1 PE T E R C A R P E N T E R 3OF 8/1/2025 DATE: SHEET TITLE: ROBERT COLLES, PE No. CE-163739REGISTEREDPROFESSIONALE N GINEER 8/1/2025 Feet 0 20 40 NOTES: 1. SLEEPY HOLLOW #1 BLOCK 1 LOTS 3 AND 6, BLOCK 2 LOTS 3, 4, AND 5, AND SUE TAWN ESTATES #2 BLOCK 1 LOTS 10, 11A, AND 12 ON-SITE SEPTIC SYSTEMS AND WELLS DO NOT INTERFERE WITH PROPOSED SEPTIC SYSTEM. 2. SLEEPY HOLLOW #1 BLOCK 1 LOTS 3 AND 6, BLOCK 2 LOTS 3, 4, AND 5, AND SUE TAWN ESTATES #2 BLOCK 1 LOTS 10, 11A, AND 12 ON-SITE SEPTIC SYSTEMS AND WELLS ARE NOT NEGATIVELY IMPACTED BY THE PROPOSED SEPTIC SYSTEM. Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251278, Curtis Townsend, 08/05/25 SYSTEM DESIGN: 1. DESIGNED SYSTEM IS FOR SLEEPY HOLLOW #1 BLOCK 1 LOT 4A1. MUNICIPALITY OF ANCHORAGE (MOA) PARCEL ID TBD. 2. DESIGNED SYSTEM WILL SERVE A 5-BEDROOM, RESIDENTIAL HOME. 3. A TEST HOLE WAS EXCAVATED TO COLLECT SOIL, PERCOLATION, AND GROUND WATER DATA FOR THE DESIGNED SYSTEM. TEST HOLE SOIL ANALYSIS AND PERCOLATION TESTING CONDUCTED BY FORGE ENGINEERING. 4. SEPTIC TANK CAPACITY IS A MINIMUM OF 1,000-GALLONS PLUS 250-GALLONS FOR EACH BEDROOM OVER THREE. 4.1. SEPTIC TANK SHALL BE A MINIMUM 1,500-GALLON CAPACITY TANK. A STEP TANK SHALL HAVE AN ADDITIONAL 250-GALLON OF CAPACITY. 5. DISPOSAL FIELDS SHALL BE DESIGNED TO ACCEPT 150-GALLONS OF WASTEWATER PER BEDROOM PER DAY. 5.1. DESIGN FLOW = 150 GPD/BDRM x 5 BDRM = 750 GPD. 6. THE MINIMUM EFFECTIVE ABSORPTION AREA OF A DISPOSAL FIELD SHALL BE CALCULATED USING THE WASTEWATER APPLICATION RATE CORRESPONDING TO THE PERCOLATION RATE IN ANCHORAGE MUNICIPAL CODE (AMC) 15.65 TABLE 2. 6.1. PERCOLATION RATE = 0.46 MIN/IN. 6.2. APPLICATION RATE = 1.2 GPD/SF (PER AMC 15.65 TABLE 2) FOR A DEEP TRENCH SYSTEM. 6.3. MINIMUM EFFECTIVE ABSORPTION AREA = 750 GPD / 1.2 GPD/SF = 625 SF 7. DISPOSAL FIELD SHALL BE A DEEP TRENCH SYSTEM. 7.1. TRENCH WIDTH (W) = [BUCKET] FT 7.2. EFFECTIVE DEPTH (D) = 8.0 FT 7.3. MINIMUM FIELD LENGTH (L) = (ABSORPTION AREA x SIZING FACTOR / W) = (625 SF / (8 FT x 2)) = 39.1 FT 7.4. MINIMUM FIELD SIZE IS 39.1-FEET LONG. USE DEEP TRENCH, 40-FEET LONG. 7.5. MAXIMUM EXCAVATION DEPTH ALLOWED IS 12-FEET. MATERIALS SPECIFICATIONS: 1. WASTEWATER DISPOSAL SYSTEM COMPONENTS AND MATERIALS SHALL BE APPROVED BY THE MOA IN ACCORDANCE WITH THE CURRENT EDITION OF MOA'S PUBLICATION "STANDARDS AND SPECIFICATIONS FOR COMPONENT PARTS AND MATERIALS USED IN CONSTRUCTION OF ON-SITE WASTEWATER DISPOSAL SYSTEMS". 2. COMPONENTS INCIDENTAL TO THE SEPTIC SYSTEM INCLUDING BUT NOT LIMITED TO PIPING, FITTINGS, PUMPS AND VALVES THAT ARE LISTED OR LABELED BY A MOA APPROVED ACCREDITED THIRD PARTY LISTING AGENCY FOR THE INTENDED USE DO NOT REQUIRE THE MOA SUBMITTAL/APPROVAL PROCESS. 3. SEPTIC TANKS SHALL BE CONSTRUCTED FROM DURABLE, CORROSION-RESISTANT MATERIALS, INCLUDING CONCRETE, FIBERGLASS, OR PLASTIC. SEPTIC TANKS CONSTRUCTED FROM STEEL SHALL BE COATED ON BOTH THE INTERIOR AND EXTERIOR WITH AN APPROVED POLYURETHANE LINING OR SUPERIOR MATERIAL. 4. ALL SEPTIC TANKS SHALL BE FITTED WITH WATERTIGHT COUPLINGS, APPROVED BY MOA, AT THE PUMP-OUT ATTACHMENTS AND ON THE INLET AND OUTLET OF THE TANK. 5. A SEPTIC TANK SHALL HAVE A 20" MINIMUM DIAMETER MANWAY RISER SERVING THE FIRST COMPARTMENT. THE RISER, INCLUDING THE COVER, SHALL BE INSULATED WITH 4" MINIMUM INSULATION EXTENDING 48" BELOW GRADE OR TO THE TANK INSULATION. THE INSULATION SHALL BE OF AN APPROVED TYPE SUITABLE FOR BELOW GRADE APPLICATIONS. EXPOSED INSULATION ABOVE GRADE SHALL BE PROTECTED FROM UV DAMAGE. THE RISER LID SHALL BE SECURED TO PREVENT UNINTENDED ACCESS. 6. PIPE AND FITTINGS SHALL BE IN ACCORDANCE WITH NOTE 1 AND "PIPE AND FITTINGS MATERIAL" TABLE. 7. PIPES USED IN GRAVITY DISPOSAL SYSTEMS SHALL BE 4" IN DIAMETER. 8. CLEAN OUTS SHALL BE LONG SWEEP. 9. SEWER ROCK/DRAIN ROCK SHALL BE COARSE, WASHED AGGREGATED THAT MEASURES 12" TO 2" IN DIAMETER WITH NO MORE THAN 1% PASSING THE No. 200 SIEVE. 10. BEDDING MATERIAL FOR SEPTIC TANKS SHALL BE PER MANUFACTURER'S REQUIREMENTS. 11. FILTER FABRIC USED AS A SILT BARRIER IN THE CONSTRUCTION OF ABSORPTION FIELDS SHALL BE A PERMEABLE GEOTEXTILE APPROVED FOR THE APPLICATION. 12. INSULATION USED IN THE CONSTRUCTION OF SEPTIC SYSTEMS FOR THE PURPOSES OF FREEZE PROTECTION OF DISPOSAL FIELDS AND SEPTIC SYSTEM COMPONENTS SHALL BE MINIMUM TYPE IV EXTRUDED OR EXPANDED POLYSTYRENE, 25 PSI COMPRESSIVE STRENGTH. PIPE AND FITTINGS MATERIAL PIPE TYPE OR ASTM DESIGNATION APPROVED AS PERFORATED DISPOSAL FIELD PIPE OR SOLID COLLECTOR PIPE APPROVED AS CLEAN OUT OR STANDPIPE CAST IRON **YES YES ASTM D3034 (PVC)YES YES ASTM F789 (PVC)YES YES ASTM D1785 (PVC)**YES YES ASTM D2665 (PVC)**YES YES ASTM D2751 (ABS)YES NO* ASTM D2661 (ABS)**YES YES ASTM F628 (ABS)**YES YES ASTM F810 (HDPE)YES NO * D2751 MAY BE APPROVED AS STANDPIPE MATERIAL IF THE MINIMUM WALL THICKNESS IS 0.18", SDR 23.5. ** UNDERGROUND DWV PIPE MATERIALS LISTED IN UPC TABLE 701.1 (2012). CONSTRUCTION SPECIFICATIONS: 1. SEPARATION DISTANCES AS IDENTIFIED IN THE "SEPARATION DISTANCES" TABLE SHALL BE MAINTAINED. NOTIFY THE ENGINEER OF DISCOVERIES MADE DURING CONSTRUCTION THAT IMPACT SEPARATION DISTANCE REQUIREMENTS. 2. FLAG AND SURVEY ALL PROPERTY LINES, WELL RADII, AND EXISTING FIELD SEPARATIONS PRIOR TO START OF CONSTRUCTION. 3. LAYOUT ALL FIELD COMPONENTS AND LOCATIONS PRIOR TO START OF CONSTRUCTION. NOTIFY THE ENGINEER IF CONFLICTS EXIST. 4. GROUNDWATER MONITOR TUBES SHALL REMAIN IN PLACE UNTIL CONSTRUCTION BEGINS. ABANDON GROUNDWATER MONITOR TUBES BY CUTTING ONE FOOT BELOW GRADE AND ABANDON IN PLACE. IF THE GROUNDWATER MONITOR TUBE IS WITHIN FIVE FEET OF THE DISPOSAL FIELD, REMOVE THE GROUNDWATER MONITOR TUBE IN IT'S ENTIRETY. 5. TANKS WITH TWO TO FOUR FEET OF COVER SHALL BE INSULATED WITH A MINIMUM OF 2" OF APPROVED INSULATION PLACED IMMEDIATELY ABOVE THE TOP OF THE TANK. TANKS SHALL NOT HAVE LESS THAN TWO FEET OF COVER. INSULATION SHALL EXTEND 12" BEYOND THE EDGE OF TANK FOR EVERY 1" OF INSULATION PROVIDED. 6. A SEPTIC TANK SUBJECT TO BUOYANCY FORCES SHALL BE ANCHORED OR BALLASTED AS REQUIRED TO PREVENT FLOTATION REGARDLESS OF THE LIQUID LEVEL IN THE TANK. 7. A SEPTIC TANK SHALL HAVE A 4" MINIMUM STAND PIPE PROVIDING ACCESS TO OTHER COMPARTMENTS NOT SERVED BY THE MANWAY RISER. 8. PROVIDE AIR TIGHT CAPS ON ALL CLEAN OUTS AND MONITORING TUBES. 9. PROVIDE A BUILDING CLEAN OUT INSTALLED ONE TO FOUR FEET FROM THE BUILDING FOUNDATION. IF NOT PRACTICAL, A DOUBLE CLEAN OUT SHALL BE INSTALLED ON THE UPSTREAM SIDE OF THE SEPTIC TANK WITHIN TEN FEET OF THE INLET. 10. A DOUBLE CLEAN OUT SHALL BE PROVIDED WITHIN TEN FEET OF THE SEPTIC TANK OUTLET. THE OPPOSING CLEAN OUTS SHALL BE ORIENTED SUCH THAT THE CLEAN OUT CLOSEST TO THE TANK SHALL BE TO CLEAN THE LINE AWAY FROM THE SEPTIC TANK, AND THE CLEAN OUT FURTHEST FROM THE TANK SHALL BE ORIENTED TO ALLOW CLEANING TOWARD THE SEPTIC TANK. THE CLEANOUTS SHALL BE LOCATED ON UNDISTURBED SOIL. A PRESSURE SYSTEM DOES NOT REQUIRE A DOUBLE CLEAN OUT. 11. SINGLE SEGMENTS OF SUBSURFACE DISPOSAL FIELDS SHALL NOT EXCEED 100 FEET IN LENGTH. 12. THE LONG AXIS OF A DISPOSAL FIELD SHALL FOLLOW THE CONTOURS OF THE ORIGINAL GROUND. 13. THE HORIZONTAL SEPARATION DISTANCE BETWEEN THE CLOSEST EDGES OF WORKING OR DECOMMISSIONED SUBSURFACE DISPOSAL FIELDS, OR SEGMENTS OF SUBSURFACE DISPOSAL FIELDS, SHALL BE AT LEAST TWICE THE DEPTH OF THE DRAIN ROCK BELOW THE LEVEL OF THE DRAINPIPE, BUT NOT LESS THAN SIX FEET. 14. THE BOTTOM OF THE TRENCH SHALL BE LEVEL WITHIN 4". THE BOTTOM OF A WIDE TRENCH OR BED DISPOSAL FIELD SHALL BE LEVEL WITHIN 2" BEFORE PLACEMENT OF DRAIN ROCK. 15. AFTER EXCAVATION HAS EXPOSED THE DESIGNATED INFILTRATIVE SURFACE, ANY NATIVE SOIL THAT IS SMEARED SHALL BE SCARIFIED TO IMPROVE ITS POROSITY BEFORE PLACEMENT OF DRAIN ROCK. 16. PERFORATED DISTRIBUTION PIPE USED IN A SUBSURFACE DISPOSAL FIELD SHALL BE LAID LEVEL AND BEDDED WITH DRAIN ROCK EXTENDING A MINIMUM OF 2" ABOVE THE TOP OF THE DISTRIBUTION PIPE, AND LEVEL ACROSS THE ENTIRE WIDTH OF THE DRAIN FIELD. 17. NON-PRESSURIZED SUBSURFACE DISPOSAL FIELD PIPING SHALL HAVE A 4" DIAMETER CLEAN OUT CONNECTED TO BOTH ENDS OF EACH PERFORATED SEGMENT. CLEANOUTS WITHIN 20 FEET AND IN LINE WITH THE DOUBLE CLEAN OUT DOWNSTREAM OF THE SEPTIC TANK MAY BE OMITTED. 18. AT LEAST ONE 4" DIAMETER MONITORING TUBE SHALL BE INSTALLED IN EACH SEPARATE DISPOSAL FIELD SEGMENT TO ALLOW MEASUREMENT OF THE FLUID LEVEL IN THE DISPOSAL FIELD. MONITOR TUBES SHALL NOT BE CONNECTED TO THE DISTRIBUTION PIPE NETWORK. THE PORTION OF A MONITOR TUBE EXTENDING DOWN FROM THE LEVEL OF THE HORIZONTAL DISTRIBUTION PIPES TO THE BOTTOM OF THE DRAIN ROCK SHALL BE PERFORATED. THE PORTION OF THE MONITOR TUBE ABOVE THE HORIZONTAL DISTRIBUTION PIPES SHALL BE NON-PERFORATED. MONITOR TUBES SHALL BE LOCATED AT ALL ANGLE POINTS OF DISPOSAL FIELDS TO MARK THE LOCATION OF THE ABSORPTIONS SYSTEM. PRESSURIZED TRENCH DISPOSAL FIELDS THAT DO NOT HAVE CLEAN OUT PIPES SHALL HAVE A MONITOR TUBE WITHIN ONE FOOT OF EACH END OF INDIVIDUAL TRENCH SEGMENTS. PRESSURIZED BED DISPOSAL FIELDS THAT DO NOT HAVE CLEAN OUT PIPES SHALL HAVE A MONITORING TUBE WITHIN ONE FOOT OF EACH CORNER OF THE BED. 19. AN APPROVED PERMEABLE GEOTEXTILE SILT BARRIER SHALL BE INSTALLED COVERING THE ENTIRE TOP SURFACE OF THE DRAIN ROCK PRIOR TO BACKFILL. 20. THE DISPOSAL FIELD COVER SHALL BE A MINIMUM OF TWO FEET DEEP, OVER THE TOP OF THE DRAIN ROCK. IF THE DISPOSAL FIELD COVER IS LESS THAN THREE FEET, THE DISPOSAL FIELD SHALL BE INSULATED WITH 2" OF APPROVED RIGID BOARD INSULATION. MINIMUM SOIL COVER OVER THE INSULATION SHALL BE ONE FOOT. INSULATION SHALL EXTEND 12" BEYOND THE EDGE OF TANK FOR EVERY 1" OF INSULATION PROVIDED. 21. THE FINISH GRADE OVER A SUBSURFACE DISPOSAL FIELD SHALL BE MOUNDED A MINIMUM OF 6" ABOVE ADJACENT GROUND TO PREVENT THE FORMATION OF A DEPRESSION AFTER THE BACKFILL HAS SETTLED. 22. UPON COMPLETION OF CONSTRUCTION ALL CLEAN OUTS AND MONITOR TUBES SHALL BE ABOVE FINAL GRADE A MINIMUM OF TWO FEET, A MAXIMUM OF 4 FEET, BE WATER TIGHT, AND LOCATED BY SWING-TIE MEASUREMENTS TO ALLOW YEAR-ROUND LOCATION AND ACCESS. SEPARATION DISTANCES SEPTIC TANK SOIL ABSORPTION SYSTEM PROPERTY LINE 5 FEET 10 FEET WATER MAIN/WATER SERVICE LINE 10 FEET 10 FEET BUILDING FOUNDATION 10 FEET 10 FEET DECKS/STAIRS >30" ABOVE GRADE 5 FEET 10 FEET SURFACE WATER 100 FEET 100 FEET PRIVATE WELL 100 FEET 100 FEET PUBLIC WATER SUPPLY SEE 18 AAC 80 SEE 18 AAC 80 >25% SLOPE >10' TALL -50 FEET >25% SLOPE <10' TALL -25 FEET SUBSURFACE DRAIN -GREATER OF 10 FEET OR TWO TIMES GRAVEL DEPTH SOIL ABSORPTION SYSTEM -GREATER OF 6 FEET OR TWO TIMES GRAVEL DEPTH WATER TABLE -4 FEET IMPERMEABLE LAYER -6 FEET INSPECTIONS: 1. AN ON-SITE WASTEWATER DISPOSAL SYSTEM SHALL NOT BE BACKFILLED, COMPLETED, OR USED UNTIL THE ENGINEER HAS INSPECTED AND TAKES NO EXCEPTION TO THE INSTALLATION. 2. NOTIFY THE ENGINEER 48 HOURS IN ADVANCE OF ANTICIPATED CONSTRUCTION. 3. THE ENGINEER WILL MEET WITH THE CONTRACTOR PRIOR TO CONSTRUCTION TO DISCUSS THE FOLLOWING, 3.1. PRECONSTRUCTION MEETING TO DISCUSS CONSTRUCTION PROCEDURES AND DESIGN REQUIREMENTS. 3.2. VERIFY SITE CONDITIONS CONFORM TO THE DESIGN PLANS AND PERMIT. 3.3. VERIFY THE PROJECT LAYOUT CONFORMS TO THE DESIGN PLANS AND PERMIT. 4. THE ENGINEER SHALL PERFORM A BOTTOM OF HOLES INSPECTION FOR THE SEPTIC TANK AND DISPOSAL FIELD. 5. THE DISPOSAL FIELD REQUIRES THE FOLLOWING INSPECTIONS, 5.1. AFTER EXCAVATION OF ALL NATIVE MATERIAL HAS BEEN COMPLETED, BUT PRIOR TO PLACEMENT OF FILTER SAND AND/OR DRAIN ROCK. THE PURPOSE OF THIS INSPECTION IS TO ALLOW VERIFICATION THAT THE NATIVE MATERIAL CONFORMS TO THE SOILS LOG AND THE EXCAVATION IS TO THE CORRECT DEPTH. 5.2. AFTER THE PLACEMENT OF FILTER SAND, IF UTILIZED. 5.3. AFTER THE PLACEMENT OF DRAIN ROCK, AND INSTALLATIONS OF DISTRIBUTION LINES, CLEAN OUTS, AND MONITOR TUBES, BUT PRIOR TO PLACEMENT OF INSULATION, SILT BARRIER, OR BACKFILL. 5.4. AFTER THE SYSTEM HAS BEEN BACKFILLED TO VERIFY FINAL GRADING AND THE LOCATION OF ALL STAND PIPES. 6. THE SEPTIC TANK REQUIRES THE FOLLOWING INSPECTIONS, 6.1. AFTER THE TANK IS SET IN PLACE WITH DISTRIBUTION PIPES AND CLEAN OUTS INSTALLED, BUT PRIOR TO BACKFILL. 6.2. AFTER THE TANK HAS BEEN BACKFILLED TO VERIFY FINAL GRADING, ELECTRICAL EQUIPMENT INSTALLATION, AND THE LOCATION OF ALL STAND PIPES. 2 SPECIFICATIONS FI L E P A T H : C : \ U s e r s \ c o l l e \ O n e D r i v e - A K B u i l t C o n s t r u c t i o n & D e s i g n \ A K B u i l t \ P r o j e c t s \ 0 0 7 7 . 0 1 1 9 1 2 2 M o u n t a i n D r i v e S e p t i c C A R P E N T E R \ A C A D \ 0 0 7 7 . 0 1 - N o t e s . d w g PL O T D A T E : 8 / 1 / 2 0 2 5 AK BUILT CONSTRUCTION & DESIGN, LLC PO BOX 771203 EAGLE RIVER, AK 99577 (907)854-9115 CERTIFICATE OF AUTHORIZATION #204451 SL E E P Y H O L L O W # 1 BL O C K 1 L O T 4 A 1 NH N M O U N T A I N D R I V E EA G L E R I V E R , A K 9 9 5 7 7 PR O J E C T N O : 0 0 7 7 . 0 1 PE T E R C A R P E N T E R 3OF 8/1/2025 DATE: SHEET TITLE: ROBERT COLLES, PE No. CE-163739REGISTEREDPROFESSIONALE N GINEER 8/1/2025 22.5° 45°WYE TH 0+00 0+1 0 0+2 0 0+3 0 0 +4 0 0+5 0 0+70 10 +0 0 10 + 1 0 10+ 2 0 10 + 30 10 +4 0 10 + 5 0 P1 P2 P3 P4 P5 P6 40' FOUNDATION CLEAN OUT 1,500-GAL SEPTIC TANK DCO CO MT CO MT DEEP TRENCH W/ 8' EFFECTIVE DEPTH TH-01 LAWN CONSTRUCTION TO OCCUR WITH HOME CONSTRUCTION APPROXIMATE LIMITS OF IMPROVEMENTS BY HOMEOWNER PROPOSED 5-BED HOUSE R100' GRAVEL DRIVEWAY WELL RADIUS SLEEPY HOLLOW #1 BLOCK 1 LOT 4A1 690 70 0 7 1 0 72 0 730 7 0 0 71 0 72 0 730 74 0 715 720 725 730 735 740 715 720 725 730 735 740 0+00 0+10 0+20 0+30 0+40 0+50 0+60 0+700+71.35 P1 P2 P3 P4 CO 1,500-GAL SEPTIC TANK DCOCO MANWAY RISER FINISH GRADE ORIGINAL GRADE COVER LESS THAN 4' REQUIRES 2" BOARD STOCK INSULATION 715 720 725 730 735 740 715 720 725 730 735 740 10+00 10+10 10+20 10+30 10+40 10+50 40' MT CO MT CO ORIGINAL GRADE FINISH GRADE P5P6 ELEV:727.13 ELEV:718.63 ELEV:730.79 COMBINATION WYE & 18 BEND CLEAN OUT SEWER WYE 18 BEND CLEAN OUT SEWER LONG SWEEP 14 BEND PERFORATED PIPE CLEAN OUT 3.0' 2" 8.0' GEOTEXTILE, SEPARATION PERFORATED PIPE MOA SEWER ROCK FILLPIPE TABLE ID P1 P2 P3 P4 P5 P6 ∅ 4" 4" 4" 4" 4" 4" LENGTH 2.50' 30.00' 10.00' 12.87' 29.33' 8.67' SLOPE 2.00% 2.00% 2.00% 2.00% 0.00% 0.00% INLET LOCATION N:2701164.3607 E:1738241.7379 N:2701163.4524 E:1738239.4088 N:2701138.5473 E:1738213.4424 N:2701131.6252 E:1738206.2254 N:2701131.8937 E:1738193.3568 N:2701131.8937 E:1738193.3568 INLET ELEV 727.90 727.85 727.09 726.89 726.63 726.63 OUTLET LOCATION N:2701163.4524 E:1738239.4088 N:2701142.6862 E:1738217.7578 N:2701131.6252 E:1738206.2254 N:2701131.8937 E:1738193.3568 N:2701103.6689 E:1738185.3763 N:2701140.2353 E:1738195.7154 OUTLET ELEV 727.85 727.25 726.89 726.63 726.63 726.63 3 SEPTIC SYSTEM FI L E P A T H : C : \ U s e r s \ c o l l e \ O n e D r i v e - A K B u i l t C o n s t r u c t i o n & D e s i g n \ A K B u i l t \ P r o j e c t s \ 0 0 7 7 . 0 1 1 9 1 2 2 M o u n t a i n D r i v e S e p t i c C A R P E N T E R \ A C A D \ 0 0 7 7 . 0 1 - S e p t i c . d w g PL O T D A T E : 8 / 1 / 2 0 2 5 AK BUILT CONSTRUCTION & DESIGN, LLC PO BOX 771203 EAGLE RIVER, AK 99577 (907)854-9115 CERTIFICATE OF AUTHORIZATION #204451 SL E E P Y H O L L O W # 1 BL O C K 1 L O T 4 A 1 NH N M O U N T A I N D R I V E EA G L E R I V E R , A K 9 9 5 7 7 PR O J E C T N O : 0 0 7 7 . 0 1 PE T E R C A R P E N T E R 3OF 8/1/2025 DATE: SHEET TITLE: ROBERT COLLES, PE No. CE-163739REGISTEREDPROFESSIONALE N GINEER 8/1/2025 Feet 0 10 20 SEWER LINE PROFILE SOIL ABSORPTION SYSTEM PROFILE NOTES: 1. PIPE LENGTHS ARE ESTIMATED AND PROVIDED FOR CONTRACTOR REFERENCE ONLY. CONTRACTOR TO VERIFY MATERIAL QUANTITIES. 2. UNIFORMLY GRADE SITE UPON COMPLETION OF SEPTIC SYSTEM INSTALLATION. MOUND MATERIAL TO ALLOW FOR SETTLEMENT OF DISTURBED AREAS AND TO MEET MINIMUM SOIL COVER REQUIREMENTS. GRADE SLOPES AT 3H:1V. TYPICAL CLEANOUT TYPICAL DOUBLE CLEANOUT TYPICAL FIELD CLEANOUT TYPICAL DEEP TRENCH 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 0.46 6/19/25 1 2 3 4 5 6SM (SILTY SANDY W/ SOME GRAVEL) Professional Engineers Stamp: SLEEPY HOLLOW #1 BLOCK 1 LOT 4 &5 6/19/25 051-501-44 PETE CARPENTER 59 8 16 1' OB 0:15 Benjamin Schiller CE 12592REGISTEREDPROFESSION A L E N GINEER PERC TEST LOCATION TECHNICIAN: JARED EARLS 65 8 16 NONE 6/26 COMMENTS: SITE PLAN 6 USCS SOIL CLASSIFICATION WAS DETERMINED BY LAB TESTING 7/9/25 MOISTURE NOTED AT TIME OF DIGGING?NONE GP (COBBLES W/ SILT & SAND) 59 8 160:27 65 8 16 6 59 8 160:28 65 8 16 6 59 8 160:28 65 8 16 6 59 8 160:30 65 8 16 6 59 8 160:28 65 8 16 6 Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP251278, Curtis Townsend, 08/05/25 6/19/20258.5A Particle Size Distribution 91¾in 84½in 793/8in 1001½in 1006in1003in % Passing Limits 51No.16 44No.30 38No.50 59No.8 73¼in 70No.4 28No.100 17No.200 Drying By:OvenDate Tested:6/20/2025 GrabSampling Method Sleepy Hollow #1, B1 L4ALocation Sample Details 25-523-1Sample ID Standard Sieve SetSpecification6/19/2025Date Sampled Result Cc Other Test Results MethodDescription LimitsCuASTM D2487 FM ASTM C136ProcedureASTM C117Water Content (%)ASTM D2216Date Tested Sieve Size Tested By Paul Santillana ASTM C136 Tested By:Jacob Marvin Report No: MAT:25-523-1Issue 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. Sean Totzke, MOA #: 076 / ICC #: 5310982Reviewed By:6/24/2025Date: 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 Page 1 of 1© 2000-2025 QESTLab by SpectraQEST.comForm No: 18909, Report No: MAT:25-523-1 Comments 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 #8 #16 #30 #50 #100 #200Sieve Size BOULDERS 0% COBBLES 0% GRAVEL (30%) COARSE 9.3% FINE 21.0% SAND (53%) COARSE 12.4% MEDIUM 16.6% FINE 23.6% SILT/CLAY 17% 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 #8 #16 #30 #50 #100 #200Sieve Size BOULDERS 0% COBBLES 0% GRAVEL (30%) COARSE 9.3% FINE 21.0% SAND (53%) COARSE 12.4% MEDIUM 16.6% FINE 23.6% SILT/CLAY 17% 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 )