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HomeMy WebLinkAboutHENKINS BLK 2 LT 2Henki'Ons Block 2 Lot 2 #051-292-15 MOA has confirmed that the on-site systems have not been installed. 7/13/2001 Municipality of Anchorage George P. 1Vuerch, Mayor Deparlmenl of Public Works Building Safcty Dh-ision P.O. Box 196650 • 4700 S. Bragaw Strect Anchorage, Naska 99519.6650 • (907) 343.8301 h ttp://ei%ir.tl.anchorage.ak.us MM & M Contracting PO Box 670495 Chugiak AK 99567 Subject: On -Site Water and/or Wastewater Permit. Permit Number: SW000325 Legal Description: Henkins Blk 2 Lt2 Dear MM & M Contracting: An On -Site Water/Wastewater Permit, number SW000325, issued by this office for a single-family system, will expire on August 23, 2001. This permit was valid for 365 calendar days. If this was a well permit and the well has been drilled, a well log must be sent to this office for documentation of the installation and to close the permit. If this permit was for a wastewater disposal system, an original as -built inspection report must be sent to this office for review, approval and documentation. This as -built inspection report must be signed by the licensed Professional Engineer who inspected the installation of the system. As -built inspection reports are required to be submitted within 30 days of the completion of the system. If no system was installed under this permit, and you are still planning to install a well or wastewater disposal system, a new permit must be obtained from this office. A new permit may be issued free of charge for a second year if the application for the renewal is received on or before the date of expiration of the original permit. When applying for a new permit, the fees are: $320.00 for a wastewater permit and $120.00 for a well permit. If you have any questions, please call this office at 343-7904. Manager On -Site Water and Wastewater Program enc: Copy of permit MUNICIPALITY OF ANCHORAGE Department of Heafth and Human Services On -Site Services Program 825 L Street, Room 502 P.O. Box 196650, Anchorage, AK 99519-6650 (907) 343-4744 ONSITE WASTEWATER DISPOSAL SYSTEM / WATER SUPPLY PERMIT Initial Permit Number: SW000325 Legal Description: Henkins, Block 2, Lot 2 Date Issued: Aug 23, 2000 Expiration Date: Aug 23, 2001 Parcel ID: 051-292-15 Design Engineer: 0014 Anderson Engineering Site Address: 3100 Dos Cir. Owner Name: MM & M Contracting Lot Size: 20038 SQ. FT. Owner Address: PO Box 670495 Total Bedrooms: 3 Permit Bedrooms: 3 Chugiak . AK 99567 - This permit is for the construction of: Q Disposal Field 0 Septic Tank E] Holding Tank E] Privy 0 Private Well El 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 DHHS at least 2 hours prior to each inspection. Provide notification by calling (907) 343-4744 (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, seated, and heated to prevent freezing. Received By: Issued By: /% t Date: Date: 8-23 —00 ANDERSON ENGINEERING P.O. BOX 240773 ANCHORAGE, AK 99524 522-7773 522-6779 (FAX) August 13, 2000 . Municipality of Anchorage' Department of Health and Human Services 825 "L" Street Anchorage, AK 99502-0650 Subject: Lot 2, Block 2, Henkins Subdivision Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of Lot 2, Block 2, Henkins Subdivision intends to construct a three-bedroom home on the lot. We are therefore applying for a permit to construct a new well and septic system on the .lot to serve the home. The attached Site Plan and backup documentation identify the location and configuration of the well and new septic system and the parameters used in the design. It also shows the 100' protective radius from the well on the lot. The Area Map shows the location of the existing and proposed wells to the north and south and their respective radii. Two test holes were placed on the lot in the area of the new absorption trench. Silty gravel with sand was encountered in the underlying strata. The material percolated at a rate of 15 minutes per inch. Groundwater was not encountered in the excavation but did develop at 11' below the surface during the monitoring period. We have therefore designed a 5' wide absorption trench with 4'. of gravel beneath the. distribution pipe.- The ipe.The total length of the trench will be 57'.. The total depth of the trench from original grade will be 5', which will be a minimum of 6' 'above the present level of the groundwater. The ground surface on the lot slopes from east to west at varying grades. The new trench will be constructed parallel,to the contours of the surface in conformance with Municipal requirements: Grading will be accomplished to assure surface drainage is away from the new trench. Mounding will be required over the trench to provide a minimum of 3' of cover or 2" of insulation will be placed and 2' of cover to provide protection against freezing. If the system is constructed in accordance with our design the following statements • apply: . t. 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 Lot 2, Block 2, Henkins . . August 13, 2000 Page Two 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. • t�� Attachments";. rS P �ty • / � �� i... _moo;' so J / so 10� . M1 - �os� C/ i ti / t lej X10 THIS PROJECT / W / el - t �• J �� VA T \ e �o 0 ., Wel VAL�AN�F\ / 143 M1 \ / 1.. 202, co . '�/ : ,oma: /� / "9 'o ��°''`•'�`+���,,��tg��r jo p tJy/r �./ ..� :.►`Sd�"^'.': -�'":'r � IL AREA MAPS SCALE I"=100' Ov SITE PLAN SCALE 1" = 40' LOT 2, BLOCK 2, HENKINS SUBDIVISION DESIGN FACTORS: SYSTEM REQUIREMENTS: Three Bedroom Home 5' Wide Trench System Perc. Rate: 15 MinAnch 1,000 Gallon Septic Tank Application Rate: .8 GPDISF 4' Drainfietd Rock 3 Bedrooms X 150 GPD /.8 GPD/SF = 562.5 SF of Absorption Area 562.5 SF/5 LF (Width)'.5 (Red. Factor) = 56.3 LF Trench Length Therefore: Construct 57' Long X 5' Wide X 4' Effective Depth Absorption Trench. Flowline Elevation in Trench to be 1.0' Below Original Ground Surface. Total Depth, to be 5.0'. Mound Over Trench to Provide Minimum of 3' of Cover. TYPICAL WIDE TRENCH SECTION (NO SCALE) NOTE: Grade Area Over Trench to Drain Away. Minimum Minimum 10SSeBedrock.eparation From paration Fr mLot Line. Z�Z.4�n`�:O�yi Minimum 4' Separation From Groundwater. x„':47 ? ; T:. A. 1 r VAT �.. . ,o Municipality of Anchorage • ♦ rN )y P Department of Health &Human Services ':',� ^�,4, 6�"�'•^" •-� / t, 825 L Street, Anchorage, AK 99502-0650 SOILS LOG - PERCOLATION TEST pp Performed For. MM&M Contracting Date Performed: 7128100 -s Legal Description: Lot 2. Block 2. Henkins Subdivision SLOPE SITE PLAN 1 OGIOL 2 p GM 3 TESTHOLE NO.1 4 See Site Plan Perc. 5 Zone 6 7 Some Sand 8 Was Groundwater 9 Encountered? No S If Yet, What Depth? L 10 Depth to Water. O After Monitoring 11• P 11 Date: 8/13100 E 12 Reading Date Gross Net Depth To Net Time Time Water Drop 13 1 28 -Jul 11:00 2.5' 2 11:30 30 4.5- 2' 14 3 11:31 2- 4 0:01 30 4- 2- 15 5 0:02 2.5- 6 0:32 30 4.5• 2• 16 Bottom of Hole 17 18 Perc. Rate: 15 Minllnch Perc. Hole Diameter. 6' 21 Test Run Between 4.5 Ft. and 5.5 Ft. Comments: Percolation Cavity Presoaked Prior to Testing. Same Material as Testhole No. 1. Performed By: Tim Kimbrou0h. I, Michael E. Anderson Certify That This Test Was Performed In Accordance With All State and Municipal Guidelines In Effect On This Date: 8113100 i Municipality of Anchorage Department of Health & Human Services 825 L Street, Anchorage, AK 99502-0650 SOILS LOG - PERCOLATION TEST Performed For. MMBM Contracting Date Performed: Legal Description: Lot 2. Block 2. Henkins Subdivision SLOPE SITE PLAN 1 OGIOL 2 GM 3 TESTHOLE NO.2 4 Perc. 5 Zone 6 7 8' 9 10 11 12 13 14 15 16 17 18 Some Sand Bottom of Hole Was Groundwater .,- ,�Y - r"%*- 0 See Site Plan Encountered? No S If Yet, What Depth? L Depth to Water O After Monitoring 11' P / Dale: 8/13/00 E Reading Date Gross Net Time Time 1 28 -Jul 11:10 2 11:40 30 3 11.41 4 12:11 30 5 12:12 6 12:42 30 CIA Depth To Net Water Drop 2.5" 4.5" 2" 2" 4' 2" 2.5' 4.5" 2" Perc. Rate: 15 Min./Inch Perc. Hole Diameter. 6" 21 Test Run Between 4.5 Ft. and 5.5 FL Comments: Percolation Cavity Presoaked Prior to Testing. Same Material as Testhole No. 1. Performed By: Tim Kimbrough. I, Michael E. Anderson Certify That This Test Was Performed In Accordance With All State and Municipal Guidelines In Effect On This Date: 8/13/00 ONSITE WASTEWATER DISPOSAL SYSTEM CONSTRUCTION AND MATERIAL SPECIFICATIONS SUBJECT: LOT 2, BLOCK 2, HENKINS SUBDIVISION GENERAL: 1. The scope of this project includes the procurement and placement of a new 1,000 gallon septic tank at the location shown on the Site Plan. Work also includes the construction of a new 57' long X 5' wide X 4' effective depth absorption trench at the location shown. Distribution pipe will be placed at 1' below the original ground surface. The total depth of the trench from original ground will be 5'. Mounding over the trench will be required to provide a minimum of 3.0' of protective cover. In lieu of 3' of cover 2" of insulation and 2' of cover is acceptable. 2. 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. 3. 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. 4. 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. 5. 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 1,000 gallon septic tank must be be procured from an approved source and installed at the location shown on the plans. 2. A septic tank is to be constructed by a certified septic tank manufacturer. Construction shall include two 4" cleanouts for pumping access. 3. The septic tank shall be sufficiently bedded to prevent settling or shifting of the tank. 4. All standpipes on the septic tank shall extend a minimum of 12 inches above final grade. 5. Tanks installed without 4' of cover shall have a minimum of 2" of direct burial insulation. 6. A foundation cleanout shall be installed one to four feet from the building foundation. Two cleanouts are required between the tank and the drainfield. Lot 2, Block 2, Henkins August 13, 2000 Page 2 of 3 7. 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 trenches 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 rock. All pockets of unacceptable materials must be removed and replaced. MATERIAL SPECIFICATIONS: 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 fitted with watertight couplings (Caulder, Femco, or equal). • Lot 2, Block 2, Henkins August 13, 2000 Page 3 of 3 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.