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Home My WebLink AboutSAND LAKE #2 BLK 4 LT 22lik D t., 1 35-31 Municipality of Anchorage Page 1 of 3 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:—gw47n?Ao PID Number: ni 11 -i5-ii Name: Lawrence E. Partusch Wastewater System: New ❑ Upgrade Address: 9210 Vanguard Drive Anchoraap- AK 99507 ABSORPTION FIELD Phone: No. of Bedrooms: 344-5678 1 3 Deep Trench ❑ Shallow Trench ❑ Bed ❑ Mound ❑ Other LEGAL DESCRIPTION Soil Rating: Total Depth from original grade: I.7i GPD/Sq. . Ft. /rte. 2 f2t Lot: n nock: �S bdiv aion: Depth to pipe bottom from Original grade: Gravel depth beneath pipe (/ (i O. 7j .O Ft. li. S Ft. Township: Range: Section: Fill added above original grade: Gravel length: 0 Ft. 30 Ft. WELL: N<ew ❑ Upgrade Gravel width: Numberoflines: between lines: Ft. �� Ft. Classification (Private. A,B,C): Total Depth: Cased To: Total absorption area: Pipe material:,--t-IM D 1,G Ft. Ft. U SD. Ft. F 8'C' 4% . ? Driller. Date Drilled: Static Water Level: Installer. „ e ''S Date installed: Ft Yield: Pump Set at: Casing Height Above Ground: GPM Ft. FL TANK SEPARATION DISTANCES 918eptic ❑ Holding ❑ S.T.E.P. To Septic absorption Litt Holding ublid/Privats Manufa�ctyur.er. ') Capacity in gallons: From Tank Field Station Tank Sewer Unes �v' j'-A1j1< 1 pp4P Welt' /GOC 1b Material: Number of Compartments: WaterSurfacs >scc / LIFT STATION Lot , n gallons: Manufacturer., w' A Line ZI � g� �' / Size ill1` fid' Foundation 5/ SZ/ �IA / f "Pump on" level at: "Pump off" at: High water alarm at: Curtain Drain ^, Pump Make & Mod lectrical Inspections performed by: /'t Remarks: Sc�«- c�c�l�a �n BENCH MARK o, tLocation and Description F,1^11 J4,C6 Fi257- FLOOR. Assumed Elevation: F ENGINEER'S SEAL Inspections performed by %�� Dates: 1s l� �� STH°yp 2nd ►-7 /1 i;i;,}i.AEL E. ANDERSON Department of Health and Human Services approval 4381-E ca Reviewed and approved by:f Date: 72-013 (Rev. 9/91) MOA 25 �'v� Permit No. —cya?a z n tag Page 2 of 3 Municipality of Anchorage 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 Legal Description: LT 22, BLK 4 Sand Lake SID, No. 2 PID No.: 011 13531 744 a • . s b O O ° • ° ° , Oe ° ° ° °e � • o J j Septic ° ° Rock ° °°°e° ♦Oe0 i °0 °°o°e p° �O� V JLCI _ ez % LEGEND SP1 Septic Pump, compartment 1 SPZ n n to 2 C Clean Out MT Monitor Tube ELEVATION AS -BLT 1" = 10" TF�� 10110HAEL E. ANDEE�60 J �,; ��c1j�e 4e81•E .�.��'s3 eerMit NO. qIA797n 7s q Page 3 of 3 Municipality of Anchorage DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P.O. Box 196650 a Anchorage, Alaska 99519=60^50 a Telephone: 343-4744 On -Site Wastewater Disposal System and/or Well Inspection Report Legal Description: LT 22, BLK 4 Sand Lake S/D, No. 2 PID No.: 01113531 Well 100' radius B 1,000 gal. GRAVEL DRIVE 3 BR Hse. septic tank MT* TH-0 II LO C2 C3 A 1 C4111 )TH .. ....... MICHAEL E. ANDERSON W, 4381-E 135.00, 150, ---.radius - -46, ' 6 S2 47.4 49.8 PLAN AS -BLT _C2 48. 8 52.9 - C3 -51._• k __55.7 ' 201 C4 54.5 65.3 - MT LEGEND SPI Septic Pump, compartment 1 SP2 of It 2 C Clean Out MT Monitor Tube MoA- oPY MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND HUMAN SERVICES P.O. BOX 196650, 825 "L" STREET, ROOM 502 ANCHORAGE, ALASKA 99519-6650 ON-SITE WASTEWATER DISPOSAL SYSTEM PERMIT PERMIT NUMBER:SW970289 DESIGN ENGINEER:ANDERSON ENGINEERING OWNER NAME:PARTUSCH LAWRENCE E OWNER ADDRESS:9210 VANGUARD DRIVE ANCHORAGE, AK 99507 PARCEL ID:01113531 LEGAL DESCRIPTION: SAND LAKE #2 BLK 4 LT 22 LOT SIZE: 6600 (SQ. FT.) NUMBER OF BEDROOMS: 3 THIS PERMIT: 3 THIS PERMIT IS FOR THE CONSTRUCTION OF: DISPOSAL FIELD /SEPTIC TANK SYSTEM ALL CONSTRUCTION MUST BE IN ACCORDANCE WITH: 3.3c� PAGE 1 OF DATE ISSUED: 9/02/97 EXPIRATION DATE: 9/02/98 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: RECEIVED BY: 7VUJ4_^ E atL,6L� DATE: q A, Iq7 ISSUED BY: /� DATE: 9Ab 2 V August 17, 1997 Municipality of Anchorage Department of Heath & Human Services 825 "L" Street Anchorage, AK 99502-0650 Subject: Lot 22, Block 4, Sand Lake Subdivision No. 2 Septic System Design Impacts to Adjacent Properties Dear On Site Services Engineer: We hereby apply for a permit to install a new septic system on Lot 22, Block 4, Sand Lake Subdivision No. 2. The attached site plan and backup documentation identify the location, size and components of the new septic system proposed to serve the .bedroom home to be constructed on the lot. The lots in this subdivision are very narrow and little area exists for the systems. The lot will be served by a Class C Water System with the well located as shown on the Area Map. ADEC has issued a waiver of the normal protective radius from 150' to 100' to the well. A copy of the waiver and the certificate to construct the Class C Well are attached f or your review. The testhole placed in the area of the proposed absorption trench revealed well graded sands with a percolation rate of less than 1 minute per inch. No groundwater was noted during excavation nor during the ensuing monitoring period. We are therefore proposing placement of a 20' long by 10' effective depth deep absorption trench for disposal of septic effluent. The material encountered in the test hole is a well graded sand with a much larger than 51% component passing the No. 4 Sieve. A sand liner is therefore unnecessary in this case. A study of wells in the area indicates a low level of nitrate content in the water. The ground surface of the lot slopes from west to east at a grade ranging from 1% to 4%. The surface of the ground in the area of the new trench is fairly flat. No conflicts were noted between the new trench and any wells in the area with the protective radii as modified by ADEC. Lot 22, Block 4, Sand Lake No. 2 August 17, 1997 Page Two If the system is constructed as designed the following statements apply: 1. 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 area. 3. The system, if constructed as designed, will have no adverse impact on reserved 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 w i I I be maintained. Sincerely, H a` v� 1 Michael E. Anderson, P.E. Attachments s Io t0 ' Ps ? tea iROPO / EXISTING BUILDING /i 7WEVPOLE 'A i -ANCHOR T I 4a 107106 I W IUD 103 RET WALL I^'' SIDEWALK •I ' - EXISTING B/ 30-1.1 ao aN WJ Q c U a p pTEC 100 LOT 21 PROPOSED CLASS C WELL LOT 31 THREE BEDROOM HOME SITE PLAN SCALE I" = 20' LOT 30 SAND LAKE ROAD RIGHT OF WAY LOT 23 ' MONITOR TUBE Q 20' LONG X 10' EFFECTIVE DEPTH ABSORPTION TRENCH 0 1,000 GALLON SEPTIC TANK 0 0 FOUNDATION CLEANOUT THREE BEDROOM HOME SYSTEM PLAN NO SCALE LOT 22, BLOCK 4, SAND LAKE SUBDIVISION N0. 2 7 DESIGN FACTORS: Three Bedroom Home Perc. Rate: LT 1 Min./Inch Application Rate: 1.2 GPD/SF SYSTEM REQUIREMENTS: Deep Trench System 1,000 Gallon Septic Tank 10' Drainfield Rock 3 Bedrooms X 150 GPD / 1.2 GPD/SF 375 SF of Absorption Area 375 SF/20 SF/LF (Absorption Area) = 18.75 LF Trench Length Therefore: Construct a Deep Absorption Trench With One Lateral 20' in Length with 10' of Drainfield Rock Beneath the Lateral. Distribution Pipe in Trench Placed at 3.5' Below the Original Ground Surface. �,/ � �,� /J/�TiJtLAL _ 3 / 8Au�1r1. GharGx" cC FAEIya �QAi�J p{Gt.J 1ZoG� TYPICAL DEEP TRENCH SECTION' (NO SCALE)n .� Ef NOTE: Grade Area Over Trench to Drain Away. Minimum 3' of Cover over Septic System. 4�7b9=ul`.k' Municipality of Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG — PERCOLATION TEST PERFORMED FOR: Spinell Homes_A DATE PERFORMED: LEGAL DESCRIPTION: L' ZZ� $7 �zAa/ CsrAc Township, Range, Section: GEbYIS c ��J ^AZ SLOPE SITE PLAN 1 b 2 3-0 Gros Time Na rime Depth to Water Net Drop 4 D. 5 , --- 3 9 Si 6 SZ (•53 7 3�7-oi7-0 {o.—T5' 8 . D I • 9 � iii i 10 •b 1 11 D . I�18 a 6 I,'I$ 12 13- 31415 14- Is- 16- 16171819 17- 18 - 19 B. , 20 WAS GROUNDWATER C.I/./., I•,T��Cl�1 S IF YES, AT WHAT L DEPTH? 0 P E ago to wgi [+tonimrillpl �2_ Batt Reading Date Gros Time Na rime Depth to Water Net Drop & i ri 3-- Is --L4 6', f+ --- 3 9 Si IIS3 SZ (•53 3�7-oi7-0 {o.—T5' 1z 1(c i I • � iii i � Ll�p t 3••2433 I�18 1�-•SL I,'I$ g PERCOLATION RATE � (minutes/inch) PERC HOLE DIAMETER if TEST RUN BETWEEN �'L FTAND 5ryF7 COMMENTS Testhole presoaked prior to test Matpri a l enr up±.erpd in f pgthol p well graded sand. More than 51% of material passes No. 4 Sieve. PERFORMED 8Y: e=7• // I 4 IFY THAT T IST ST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE DATE -- -. M -p 4/851 A 711 TONYKNOWLES, GOVERNOR �� U I "- u v i U. - DEPT. OF ENVIRONMENTAL CONSERVATION i ANCHORAGEMESTERN PUBLIC SERVICE OFFICE 555 CORDOVA STREET ANCHORAGE, ALASKA 99501 (907) 269-7505 July 23, 1997 Mr. Michael E. Anderson, P.E. Anderson Engineering P.O. Box 240773 Anchorage, AK 99524 RE: Lots 21, 22, 31, 32 Block 4 Sand Lake Subdivision No.2; Request For Waiver of Horizontal Separation Distance, Class "C" Well, and Stormwater Plan Review. AWPSA Project Nos. 9721 -WV -174 -050,9721 -OW -174-139, and 9721 -WW -133-331. Dear Mr. Anderson: This letter is in reference to the materials received in this office June 20, and 23, 1997, regarding a stormwater plan review, and a waiver request for a lesser horizontal separation distance between a proposed class "C" source well and supporting on-site wastewater disposal systems to serve the above referenced lots. The Department has completed its review of the submitted materials which included a cover letter, site plan, surrounding soils logs, surrounding well logs and a history of water quality sampling in this area. Based upon a review of the submitted information the Department has the following comments concerning approval or nonobjection of this project: Stormwater Plan Review: From the information submitted a limited amount of fill material was to be removed for development of the above referenced lots. A verbal nonobjection was given to Mr. Randy Ross with the Municipality of Anchorage, Department of Public Works Project Management and Engineering to issue the fill permit. This nonobjection was based upon a review of the completed ADEC stormwater pollution prevention and plan review checklist, and profiles of the developed lots which indicated appropriate best management practices for the treatment and management of stormwater runoff. Horizontal Separation Waivers: After reviewing the submitted information it appears that the minimum separation distances proposed between the new class "C" well and supporting wastewater disposal systems should present minimal threat of contamination. However, the density of surrounding on-site Approval to Construct section verifying this Department's approval. This approval does not imply the granting of additional authorizations nor does it obligate any other state, federal, or local regulatory agency to grant required authorizations. Thank you for your cooperation with this Department. If there are any further questions regarding the above, please do not hesitate to call. Sincerely, Michael Lu, E.I.T. Environmental Engineer MLU/ph a�Vftr1 attachment cc: Randy Ross, MOA/DPW/Project Management & Engineering STATE OF ALASKA DEPARTMENT OF ENVIRONMENTAL CONSERVATION CONSTRUCTION AND OPERATION CERTIFICATE for PUBLIC WATER SYSTEMS A. APPROVAL TO CONSTRUCT Plans for the construction or modification of Lots 11, 12 $k 4 Sand 4al[e S4bdLVWQ, 101 9721 -DW 179- at public water system located in An ,,rano Alaska, submitted in accordance with 18 AAC 80.100 by fit A",%,ar E e'ti,.rtee have been reviewed and are p approved. ❑ conditionally approved (see attached conditions). � �R�rcrow.�••l .e�ou yMix! B l TITLE �_ DATE If construction has not started within two years of the approval date, this certificate is void and new plans and specifications must be submitted for review and approval before construction. B. APPROVED CHANGE ORDERS Change (contract order no. or descriptive reference) Approved by Date C. APPROVAL TO OPERATE The "APPROVAL TO OPERATE" section must be completed and signed by the Department before any water is made available to the public. The construction of the public water system was completed on (date). The system is hereby granted interim approval to operate for 90 days following the completion date. BY TITLE DATE As -built plans submitted during the interim approval period, or an inspection by the Department, has confirmed the system was constructed according to the approved plans. The system is hereby granted final approval to operate. BY TITLE 18-0407 (Rev. 11193) DATE DISTRIBUTION: 1. WHITE - ENGINEER (Complete Section C) 2 YELLOW - WATER SYSTEM FILE (Complete Sectlon C) 3. PINK - ENGINEERIMUNI-BOROUGH (Complete Section C) 4. GOLDENROD - MUNI -BOROUGH (Complete Section A) MUNICIPALITY OF ANCHORAGE ® DEPARTMENT OF HEALTH & HUMAN SERVICES Division of Environmental Services CA On -Site Services Section P.O. Box 196650 Anchorage, Alaska 99519-6650 343-4744 CERTIFICATE OF HEALTH AUTHORITY APPROVAL FOR A SINGLE FAMILY DWELLING Parcel I.D. # 01 1 1 353d HAA # OC1 9`L L'� 1. GENERAL INFORMATION LL -)(e) �'�cu"-) Complete legal description Lot 22, Block 4, Sand Take Snhclivision Nn_ 2 Location (site address or directions) Property owner Lawrence F.- Partncch Day phone 344 —5b7S Mailing address 9210 Vanguard Drive Anchorage, AK 99507 Lending agency Day phone Mailing address Agent Day phone Address Unless otherwise requested, HAA will be held for pickup. 2. NUMBER OF BEDROOMS: 3 3. TYPE OF WATER SUPPLY: Individual well Community well xxx Public water NOTE: If community well system, provide written confirmation from State ADEC attest- ing to the legality and status of system. 4. TYPE OF WASTEWATER DISPOSAL: Individual on-site xxx Holding tank Community on-site Public sewer NOTE: If community wastewater system, provide written confirmation from State ADEC attesting to the legality and status of system. 72-025 (Rev. 1/91) Front MOA #21 5. STATEMENT OF INSPECTION BY ENGINEER As certified by my seal affixed hereto and as of the validation date shown below, I verify that my investigation of this Health Authority Approval application shows that the on-site water supply and/or wastewater disposal system is safe, functional and adequate for the number of bedrooms and type of structure indicated herein. I further verify that based on the information obtained from the Municipality of Anchorage files and from my investigation and inspection, the on-site water supply and/or wastewater disposal system is in compliance with all Municipal and State codes, ordinances, and regulations in effect on the date of this inspection. Name of Firm Anderson Engineering Phone 522-7773 Address P.O. Box 240773 Anchorage, AK 99524 Engineer's signature, t"`ll'�� Date 3113/98 6. DHHS SIGNATURE �1 Approved for bedrooms. Disapproved. Conditional approval for Additional Comments By: 4fJTIC bedrooms, with the following stipulations: Date—q-1-1-179 The Municipality of Anchorage Department of Health and Human Services (DHHS) issues Health Authority Approval Certificates based only upon the representations given in paragraph 5 above by an independent professional engineer registered in the State of Alaska. The DHHS does this as a courtesy to purchasers of homes and their lending institutions in order to satisfy certain federal and state requirements. Employees of DHHS do not conduct inspections or analyze data before a certificate is issued. The Municipality of Anchorage is not responsible for errors or omissions in the professional engineer's work. -72-025(Rw. 1/91) Sack MOA 7121 • Municipality of Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICR f C E I V E D Environmental Services Division A 825 L Street, Room 502 • Anchorage, Alaska 99501 • (907M� 3-fl•g4698 Health Authority Approval Checkli Municipality of Anchorage pt. Health & Human Services Legal Description: Lot 22, Block 4, Sand rake Parcell.D.: 011135 i1 No. 2 A. WELL DATA Well type C Log present (Y/N) Total depth Sanitary seal (Y/N) Date of test Static water level Well production WATER SAMPLE RESULTS: If A, B, or C, attach ADEC letter. ADEC water system number 21 8539 Date completed Cased to FROM WELL LOG g.p.m. Casing height (above ground) Wires properly protected (Y/N) AT INSPECTION Coliform 0 Nitrate _ _ 1 mgJr. Other bacteria Date of sample: 2/27/98 Collected by: A- Fra ra l a B. SEPTIC/HOLDING TANK DATA 9 - p.m - Date installed 9/17/97 Tank size 1, 0 0 0 Number of Compartments 2 Cleanouts (Y/N) Y Foundation cleanout (Y/N) Y Depression (Y/N) N High water alarm (Y/N) N Date of Pumping New Pumper Onnci-rnrt i nn C. ABSORPTION FIELD DATA Date installed 9Z17/97 Soil rating (g.p.d./ft2 or ft2/bdrm) 1 _2 System type nPPn mrF+nrh Length -� 0 , Width 41 Gravel thickness below pipe ti r; I Total depth 1 0 5 , Effective absorption area 390 SF Monitoring Tube present (Y/N) Y Depression over field (Y/N) N Date of adequacy test New Const. Results (Pass/Fail) Pass For 3 bedrooms Fluid depth in absorption field before test (in.); Immediately after gal. water added (in.): _ Fluid depth (ins) Minutes later: Absorption rate = g.p.d, Peroxide treatment (past 12 months) (Y/N) If yes, give date 72-026 (Rev. 3/96)* D. LIFT STATION Date installed_ Manhole/Access (Y/N) High water alarm level at* Cycles tested E. SEPARATION DISTANCES None on Lot Size in gallons "Pump on" level at* *Datum SEPARATION DISTANCES FROM WELL ON LOT TO: Septic/holding tank on lot Absorption field on lot Public sewer main Sewer /septic service line "Pump off" level at* Public Water System On adjacent lots On adjacent lots Public sewer manhole/cleanout Lift station SEPARATION DISTANCES FROM SEPTIC/HOLDING TANK ON LOTTO: Foundation >51 Property line >51 Absorption field >51 Water main/service line > 10 Surface water/drainage >100' Wells on adjacent lots > 10 0 SEPARATION DISTANCE FROM ABSORPTION FIELD ON LOTTO: Property line 8' Building foundation >10' Water main/service line >10' Surface water >100' Driveway, parking/vehicle storage area >301 Curtain drain None on Lot Wells on adjacent lots >100' F. ENGINEER'S CERTIFICATION 1 certify that I have determined thru field inspections and review of Municipal records tf�a fr��k1ye systems are in conformance with MOA HAA guidelines in effect on this date. 4 �� rn § Signature TH, Engineer's Name Michael F._ AndcPrsnn, P_F., h E Date 3/13/98 " �L E. ANDERSON $t J 4381-E . P� HAA Fee $ oM M Waiver Fee $ Date of Payment '-1(n `1S Date of Payment 3-1 (B Receipt Number L_�CDt i_�S / --I l 2� Receipt Number b �)Cn'A1,�S 72-026 (Rev. 3/96)* va_U1hT of Ama��,eorr.'_.me Department of Health and Human Services Rick Mystrom, 825 "U" Street P.O. Box 196650 Anchorage, Alaska 99519-6650 Mayor 907-343�44 http://www.c1anh�orage.ak.us April 1, 1998 Michael E. Anderson Dimond Center, Suite 3-520 P.O. Box 240773 Anchorage, AK 99524 Subject: Waiver Request for Sand Lake Lot 22, Block 4 Waiver Request #WR980009, PED #011 135 31 #HA980049, #SW9700289 Dear Mr. Anderson: Your request for a waiver of the required 10 foot horizontal separation from the on-site wastewater disposal system to a property line has been approved. The approved separation distance is 8.0 feet. This waiver approval applies to the existing absorption field to property line separation only. Any future upgrade to the on-site wastewater disposal system will require all separation distances be met or another approval from this department. If there are any further concerns or questions regarding this waiver, please call our office at 343-4744. Sincerely, Donna C. Mears Civil Engineer On -Site Water Quality Program WR# WR980009 MUNICIPALITY OF ANCHORAGE Department of Health and Human Services On-site Services Section Waiver Review Worksheet PID # 011-135-31 HA# RA980049 Date Received: March 16, 1998 Permit # SW970289 Legal Description• Lot 22 Block 4 Sand Lake Subdivision #2 Engineer: Michael E. Anderson, P.E „ Anderson Engineering PO Box 240773, Anchorage, Alaska 99524 Applicant: Lawrence E. Partusch Waiver Requested: Lot line waiver of 8 feet fron* the trench to the south property line Criteria: 1. Geology: A. Water Table B. Soil Sorption C. Permeability D. Water Table Gradient E. Horizontal Separation TOTAL: 2. Special Conditions: 3. Other: Points: Waiver is Granted: Waiver is NOT Granted: List Conditions or Reasons for above: Date: By: Name of Reviewer Rec #: 403645/7773 Amount: $ 115.00 Date Paid: March 16, 1998 March 13, 1998 Municipality of Anchorage Department of Heath & Human Services 825 "L" Street Anchorage, AK 99502-0650 Subject: Lot 22, Block 4, Sand Lake Subdivision No. 2 Lot Line Waiver Request Dear On Site Services Engineer: RECEIVED MAR 16 1998 "unicipaiity of Anchorage Dept. Health & Human Services The attachedSite Plan shows the location of the absorption trench recently constructed on the subject lot. Due to the small size of the lot and the conflicting 100' and 150' radii from adjacent wells it was necessary to encroach within 10' of the southern lot line. We are therefore requesting a lot line waiver be issued allowing this encroachment. Lots in this subdivision are only 50' wide. Underlying soils have an absorption rate of 1.2 gallons per square foot per day and consist of very clean sandy gravel. It is difficult to impossible, therefore, to construct a trench much deeper than 10' which will retain a vertical sidewall. The effective depth of the designed trench on this lot was 6.5'. With the 4' for placement of the distribution piping and the depth for cover over the trench the total depth was 10.5'. Since the width of the lot is only 50' the trench had to be placed exactly 10' from each lot line. In this case the trench encroached to within 8' of the south lot line. Soils on the lot are very good for an onsite system and no groundwater was found during the testhole and design phase of the project. The subdivision is served by a community well. Other wells in the area show no sign of nitrate content and none is expected in the well serving this lot. Placing the absorption trench within 8' of the line will have no adverse impact on systems currently in place or to be placed in the future. We therefore recommend a waiver be issued to allow construction of the absorption trench to within 8' of the lot line. Please let me know if you have additional questions. Sincerely, Michael E. Anderson, P.E. Attachments v tlAEi_ �. ANDERSON 4381E.4 ��