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HomeMy WebLinkAboutSKYHILLS PH 3 BLK 3 LT 28 MUNICIPALITY OF ANCHORAGE Development Services Department On-Site Water & Wastewater Program 4700 South Bragaw Street P.O. Box 196650, Anchorage, AK 99519-6650 (907) 343-7904 ON-SITE WASTEWATER DISPOSAL SYSTEM PERMIT Initial Date Issued: Aug 05, 2003 Expiration Date: Aug 04, 2004 Permit Number: SW030297 Legal Description: Skyhills Phase Ill Block 3 Lot 28 Design Engineer: 0014 Anderson Engineering Owner Name: Archid Designs, Builders Owner Address: P.O. Box 212576 Anchorage, AK 99521- Parcel ID: 011-122-60 Site Address: Unknown Lot Size: 44797 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 ( 18AACS0 ). 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: ~,L¢_ ~,t~ Issued B y,'~.._~(~.,~ ~ Parcel I.D. 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 Permit Number SW Property owner(s) AP, CHID Designs: Builders Mailing address (1) F,O, Box 212.576 Anchorage. Alc, 99.521 Mailing address (2). Zip Code Legal description (Lot, Block & Sub'd.) Lot 28, Block 3, Skyhills Phase III Legal description (Section, Township & Range) Lot Size 44.797 RI: Acres/Sq. Ft. Number of Bedrooms .Four (4) Day phone 338-7278 THIS APPLICATION IS FOR: Sewer Only Sewer and Well Sewer Upgrade THIS PROPERTY CONTAINS: Hot Tub Swimming Pool Therapy Pool [] 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: ~t:~p ~ Waiver Fees: Date of Payment: '~/,PO/p 3' Date of Payment: Receipt Number: ,,~ O~ -~ / 0 Receipt Number: (Rev. t 2/00) ~ '~ July 29, 2003 Municipality of Anchorage Development Services Department On-Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Lot 28, Block 3, Sky Hills Subdivision Phase III Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of Lot 28, Block 3, Sky Hills Subdivision Phase III intends to construct a four-bedroom home on the lot. We are therefore requesting a permit be issued for the construction of a new septic system to serve the new home. The subdivision is served by the Municipal Water System. The attached Site Plan and backup documentation identify the location and configuration of the new septic system and alternate site and the parameters used in the design. Also identified on the plans are the location of the water service on the lot, test holes and the septic systems on the surrounding lots. Drainage arrows are shown indicating the current drainage patterns. The drainage patterns will be maintained after construction. The test holes placed near the location of the proposed absorption trench indicated fine sand with some silt to a depth approximating 20' and percolation rates from 1 to 5 minutes per inch. No groundwater was found during placement of the test holes, and none was noted during the monitoring period. We are therefore proposing to place a new 1,250-gallon septic tank and a 50' long x 5' wide x 4' effective depth absorption trench. The distribution pipe will be placed 3' below the existing surface and the total depth will be 7'. Sufficient fil~ will be placed over the septic tank and absorption trench to Prevent freezing. The ground surface on the lot slopes at shallow grades from northwest to southeast with a steep drop off at the back of the lot. The absorption trench will be constructed parallel with the slope as much as possible in conformance with Municipal Lot 28, Block 3, Sky Hills Phase II! July 29, 2003 Page Two requirements and more than 50' from the bluff line. All components of the new septic system will be constructed a minimum of 10' from the water service on this lot and 100' from any surface water in the area. If the system is constructed in accordance with our design the following statements apply: ]. The system, if constructed as designed, will have no adverse impact on the wells in the area or those to be constructed in the future. 2. The system, if constructed as designed, will have no adverse impact on existing septic systems in the area or those to be constructed in the future. 3. The system, if constructed as designed, will have no adverse impact on reserve space, either surface or subsurface, on any lots located in the area. 4. The system, if constructed as designed, will have no adverse impact on drainage patterns in the area. The current drainage pattern will be maintained. Sincerely, Michael E. Anderson, P.E. Attachments 21' 45,6,35 ~q'ft SLOPE MAIN]ENANOE EASEMENT 23 41.161 sq.ft O~AINAG~" EASEMENT 10' m' ~'~ DRAINAGE ~AINTENANCE EASEMENT' ' EASEMENT . ,,.~_,~ ~ 24 · '- · ~_~_^ 41,347 sq ft I { .~ 27 ~) 41,892 sqtft. ~7-~-^ ? ~. ~ ~C~ EASEMENT (S~ NOTE ~0) N89'SS'28~E 768.34'( 45,103 sq.ft 10' DRAINAGE AND ~A.}L ' EASF3JENT 10' SLOPE & TP TRAIL EASEM E.N T~ 20' TRAIL 5:2-3-9 ~As~ENT 32 ~0,418 sq.ft .'~ 31. 4o,¢50 sq.ft · LOT.~O THIS PROJECT TRACT A' ', 107,780' Sq':~t. ~ MICHAEL E. ANDERSON No. CE-498! MOUNTAIN/ -/ CIRCLE~ ~.\ ¥..........~ \ ,~ , ,o~o.oo.. ,~9.~8, LOT 2 ' - ~ ~ 1~ U~LITY EASEMENT S 89~5'28" W 52~.77' SITE PLAN -¢~:; .............. ~'~" LOT 28, BLOCK 3, SKY HILLS SUBDIVISION PHASE ,,, LOT 28, BLOCK 3, SKY HILLS SUBDIVISION PHASE III DESIGN FACTORS: SYSTEM REQUIREMENTS: Four Bedroom House 5' Wide Trench System Perc. Rate: 1-5 Min./Inch 1,250 Gallon Septic Tank Application Rate: 1.2 GPD/SF 4' Drainfield Rock 4 Bedrooms X 150 GPD/1.2 GPD/SF (Application Rate) = 500 SF Absorption Area 500SF/5 LF 0Nidth)* .5 (Red. Factor) = 50 LF Trench Length THEREFORE: Construct a 50' Long x 5' Wide x 4' Effective Depth Absorption Trench. Flow Line Elevation in Trench to be 3' Below Original Ground Surface. Total Depth to be 7' Below Existing Ground. Maintain 10' Separation From Water Service Line. Place 2' of Direct Bury Insulation and 2' of Fill Over Absorption Trench or Provide Minimum 3' of Cover to Prevent Freezing. Place 4' of Cover Over Septic Tank. 2a6'~ Natural Backfill Geotextile -- Fabric 4" Perforated PVC (Holes Down) -- Drainfield Rock TYPICAL 5' WIDE TRENCH SECTION -- ---- ~C~L~-"~--'--- --~ ~;~ NOTE: Grade Area Over Trench to Drain Away, ~.'.'~? 49th Minimum 6: Separation From Bedrock. ~,.~__...~. Minimum 4 Separation From Groundwater. ~.----~ Minimum 10' Separation From Water Service Line, Minimum 100' Separation From Surface Water or Streams.~ ~'~¢~/'~'* ~'~ '"', No. CE-4381 Mun!cipality ¢f Anchorage Department of Health & Human Services 825 L Street. Anchorage, AK 99502<)650 SOILS LOG - PEROOLATION TEST Performed For: B.~b Klein : Legal Description: Lot 28. Block 3, Sky Hills: Phase III SLOPE 5 6 7 8 9 10 1.1 oG/PT TESTHOLENO. 28-3-A · Was Ground~vater Fine Sand Encountered? No If Yet,' What Degth? Some Silt Depth to Water After Monitoring None Date: 10tl.0/99 Date Performed: 9/28/99 /1 ========================= S 0 P E 5% '-'1 0% 1'2 13 .14 15 16 18 2O CE-4381 Clean Sand SP Bottom of Hole Reading Date Gross " Net Depth To Net Time Time ' Water Drop 5 15:03 .25" Perc. Rate: 2 Min./in0h Perc. Hoie.,Diameter: 6" Test Run. Between 6 Ft. and 7 Ft. ,Comments:. Percolation Cavity Presoaked Prior 'to Testing. Performed By:. ~LS..sJZdC, Ls..cz~. I, i I , . Certify That This Test Was Performed In Accordance Wit;% All State and Municipal Guidelines In Effect 'On This Date: 1'0125/99 MuniCipality of Anchorage Department of Health & Human Services 825 L Street, Anchorage, AK 99502-0650 SOILS LO(~? PERCOLATION TEST Performed For: Bob Klein Legal Description: Lot 28. Block 3. sky Hfl.ls.. Phase '4 ' 6¸ 7 8 9 10 12 ~3 14 15 18 Date Performed: 9/28/99 OGIPT TESTHOLE NO. 28-3-B- SP SP ' SLOPE SITE PLAN Fine Sand No S 5~ - 1 0% L -- None' P 10/10~99 E Read!ng Date' Grdss Net Depth To Net I Time Time Water Dr~p 1 28-Sap 15:22 .5" 2 15:32 10 2.5" ' 2" 3 · '' 15:33 .5~' '4 15:43 10 2.5" 2" 5 1.5:44 ,25". 6" ~ 15:54 10 i. 2.25" 2" Was Groundwater Encountered? If Yet, What Depth?: Depth to Water After Monitoring E, AN<DER$Ohl ~" Per~. Rate: 5 Min./lncl~ Perc. Hole D ameter: 6" Bottom of Te~t Run Between 6 Ft. and 7 Ft. Hole Comments: Percolation Cavity Presoaked Prior .to Testing. Performed By: Ed Sanderson. .1, Michael E. Anderson certify That This ?est Was Performed In Accordance With All State and Municipal Guide ines tn Effect On This Date: 10/25/99 . Municipality of Anch(~r~ge' Department of Health & Humar~ Services' 825 L Street AnchQrage, AK 99502-0650 S'OILS LOG - PERCOLATION TEST .Performed For: Bob Klein Legal Description; Lot 28. Blbck 3. Sky Hills. Phase Ill 9 10 11 12 13 14 15 17 18 Date Performed: 9/28/99 Apparent Fill Area GM TESTHOLE NO. 28-3-C- Was Groundwater Encountered? If Yet, What Depth? 'Depth to Water . At,er Monitoring Date: SP Fine Sand ~% ' ~ ' TH ' .~' Hole -. SLOPE' ~' . ~ : SITE PLAN S .L -- 5% _ .1 None P 10/10/99 E ~,eading Date Gross. Net Depth To Net Time Time Water DroP) 1 28-Sep 16:08 '.5" 2 16:18 10 6.5" 6" 3 13:I9 .5" 4 16:29'.' 10 . 6.5" .6" 5' 16:30 .25" 6 16:40 10 6.25" 6" Perc. Rate: 1.7 Min./inch Perc. Hole Diameter: 6" Test Run Between 7 Ft. and 8'Ft: Comments: Percolation Cavity Presoaked Prior to Testing. Performed By: Ed Sanderson. i, ' h I n ' Certify That This Test Was Performed In Accordance With All State and Municipal Guidelines In Effect On This Date: 10125/99 ON-SITE WASTEWATER DISPOSAL SYSTEM CONSTRUCTION AND MATERIAL SPECIFICATIONS SUBJECT: LOT 28, BLOCK 3, SKY HILLS SUBDIVISION PHASE III GENERAL: The scope of this project includes the procurement and placement of a new 1,250-gallon septic tank at the location shown on the site plan. Work also includes the construction of a new absorption trench 50' long by 5' wide by 4' effective depth also at the location shown on the Site Plan. The total depth of the trench will be 7' below existing ground and the distribution pipe will be placed at 3' below the surface. All components of the new absorption trench and septic tank must be constructed a minimum of 100' from any surface water and 10' from the water service on this and adjacent lots. A minimum of 4' of cover is required over the septic tank and 3' overthe absorption trench. In lieu of cover 2" of direct bury insulation and 2' of cover may be placed. Construction shall be in accordance with the approved site plan, design drawings, Municipal Permit with any special provisions or conditions, and all applicable State and Municipal Wastewater Disposal Regulations. The Contractor shall be responsible for obtaining all underground utility locates and for the layout of the septic system and verification of the location of all lot lines. Unless specifically agreed otherwise, the contractor shall be responsible for final grading areas subsequently depressed from soil settling. Property owner shall be responsible for revegetation of affected areas unless specifically agreed otherwise. Contractors installing wastewater disposal systems must be certified by the Municipal Department of Health and Human Services for system installations. Owners installing their own systems must receive prior approval from D.H.H.S. before beginning system installation. SEPTIC TANK INSTALLATION 1. A new 1,250-gallon septic tank must be procured from a certified septic tank manufacturer if the existing tank is found to be defective. 2. A septic tank is to be constructed by a certified septic tank manufacturer. Construction shall include two 4" cleanouts for pumping access. Lot 28, Block 3~ Sky Hills Phase III July 29, 2003 Page 2 of 3 o The septic tank shall be sufficiently bedded to prevent settling or shifting of the tank. All standpipes on the septic tank shall extend a minimum of 12 inches above final grade. Tanks installed without 4' of cover shall have a minimum of 2" of direct burial insulation. A foundation cleanout shall be installed one to four feet from the building foundation. Two cleanouts are required between the tank and the drainfield. Final grading over the tank shall be such that a positive slope exists away from the septic tank. DRAINFIELD CONSTRUCTION: 1. The drainfield shall be constructed to the dimensions shown on the design. The bottom of the trench shall be within 2"of level. 2. Distribution piping must be placed level with perforations down atop a level bed of drainfield rock. Rock should then be placed over the pipe to provide a minimum of 2" of cover. 3. A silt barrier or geotextile fabric must be placed between the drainfield rock and the natural soil backfill. 4. Monitor tubes must be 4" in diameter and installed at the locations shown on the design. The portion belOw ground must be perforated. 5. Contractor shall verify the septic tank and drainfield are a minimum 100' away from any private water wells in the area, 150' from a Class "C" Well or 200' from any community well. 6. Direct bury insulation must be placed over the distribution system if less than 3' of backfill depth is available. Finish grade over the trench must be mounded to prevent settlement or depressions. 7. Grade area surrounding the absorption trench to drain away. 8. A minimum 2' of accepting soil is required below the drainfield rock for a 5' wide trench. Contractor shall verify this condition prior to placement of the rock4 All pockets of unacceptable materials must be removed and replaced. MATERIAL SPECIFICATIONS: Lot 28, Block 3, Sky Hills Phase III July 29, 2003 Page 3 of 3 1. Septic tanks must be constructed by a municipally approved septic tank manufacturer. 2. The following pipe materials are approved for use in septic system installations in the Municipality of Anchorage: Cast Iron (perforated and solid), ASTM D3034 or P.V.C. (perforated and solid), ASTM F810 or H.D.P.E. (perforated, but not solid) and ASTM D2662 or A.B.S. (perforated and solid). 3. Insulation shall be at least 2" thick extruded direct burial polystyrene (Dow Chemical Co. Styrofoam HI or equal). 4. Septic tank inlets and outlets shall be tiffed with watertight couplings (Caulder, Fernco, or equal). 5. A permeable geotextile fabric (Typar, Mirafi or equal) must be installed between the final drain rock layer and the native soil layer. 6. All drain rock shall be .5" to 2.5" in diameter with less than 3% passing the #200 sieve. INSPECTIONS: Municipal Ordinance requires a minimum of two inspections. These inspections must be conducted under the supervision of a professional engineer registered in the State of Alaska. The first inspection must be conducted after the excavation of trenches, beds or pits and before the installation of any gravel. A septic tank may be set in place, but may not be backfilled. The second inspection must be conducted after the placement of the geotextile fabric, gravel, distribution piping, standpipes, cleanouts and insulation. No backfill should be in place at the time of inspection. Contractor shall provide a copy of all field survey layout and construction notes for use in preparing the certified as-built of the completed system.