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Home My WebLink AboutEAGLE RIVER HEIGHTS BLK 2 LT 8 Municipality of AnChorage' DEPARTMENT OF HEALTH AND. HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P~ge I of 3. P.O. Box 196650 · Anchorage, Alaska 99519-6650 · Telephone: 343-4744 On-Site Wastewater Disposal System and/or ,Well Inspection Report Permit Numbec SW97037g ' PID Number:. 05028133 Julie Me ers 10307 Wildwood Street NO. of LEGAL DESCRIPTION WELL: Exi,, ~ Upgrade'~ FL SEPARATION DISTANCES Wastewater System: · 1:3 New E) Upgrade · ABSORPTION FIELD . Tr~lcfl t~ SllallOw Tmn¢~ ~ Bed' r'l M~,Jn¢l ~ Other I 37 5 1 375 ASTM D3034 TANK ; Septic ~ Holding rl S.T.E.P. LIFT STATION - N/A Remarks: 3tion trench se tion~ 3tic tank'and crib pumped, crushed and backfille{ BENCH MARK Top of Slab @ Rear 100 Inspections performed by:. S. Gilbert Dates:lst 11/3/97 2nd 11/5/97 Department of Health and Human Services approval Reviewed and approved by:.' ,~. ,~' ~ Date:/- F-~B ANDERSC, N 4331 -E Municipali{y of Anchorage' 'page, 2of 3 " DEPARTMENT OF HEALTH AND. HUMAN SERVICES .. ENVIRONMENTAL SERVICES DIVISION' · ' ' -. P.O. Box' 196650 · Anchorage, Alaska 99519-66~0 · Telephone: 343-4744 On-Site Wastewater Disposal SYstem and/or Well Insj3ecflon Rep?rt PermitNumbec '~;wg"/o'~?~) . PID Number:. 0'5028133 . · WILDWOOD STREET BEDROOM ~OME'. C( C( SI M, A 51.7 75.0 41 .5 72.5 59.5' 50.0 46.5 48.7 ~ SP2 "' C02 TH#1 ·,./ PLAN AS-BUILT 'l SCALE 1" = 20' 4381-E ......................... :-' MunicipalityOfAnchomge" '" t,~g,~'of '~:' · 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~,°r,,Well.. . . . Inspection Report. · ' Parmit Number: SW970379 _. ...PID_Number._. .05028~ 33 '2 TH1 M~I . Cq 5 : PAGE MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND HUIq~ SERVICES P.O. BOX 196650, 825 "L" STREET, ROOM 502 ANCHORAGE, ALASKA 99519-6650 ON-SITE WASTEWATER DISPOSAL SYSTEM (UPGRADE) PERMIT 'PERMIT NUMBER:SW970379 DESIGN ENGINEER:ANDERSON ENGINEERING OWNER NAME:~JULIE MEYERS OWNER ADDRESS:10307 WILDWOOD ST EAGLE RIVER, AK 99577 DATE ISSUED:10/22/97 EXPIRATION DATE:10/22/98 PARCEL ID:05028133 LEGkL DESCRIPTION: EAGLE RIVER HEIGHTS BLK 2 LT LOT SIZE: 10824 (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: 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: ~/~t~ ~_.~~ ISSUED BY: DATE: DATE: IO .,zz .q Mumcipality of AnchO.rage Department of Health and Human Services 825 "L" Street F~ickMystrom,P.O. Box 196650 Anchorage, Alaska 99519-6650 Mayor - - October 22, 1997 Michael E. Anderson, PiE. Anderson Engineering PO Box 240773 Anchorage, Alaska 99524 Subject: Waiver Request for Lot 8 Block 2 Eagle River Heights Subdivision Waiver Request ~WR970066, PID ~050-281-33 Dear Mr. Anderson: Your request for a waiver of the required 10 foot separation b~tween an on-site wastewater disposal system and a lot line has been approved. The waived distance is 3 feet from the absorption field to the northern property line. This approval applies to the existing on-site wastewater disposal system lot line separation only. Any future upgrade to the on-site wastewater disposal system will require all separations be met or another approval from this department. If there any further questions or concerns regarding this waiver, please call our office at 343-4744. Sincerely, Donna C. Meats Civil Engineer On-site Services lJw 17 Meyers MUNICIPALITY OF ANCHORAGE Department of Health and Human Services On-site Services Section Waiver Review Worksheet WR# WR970066 PID# 050-281-33 HA# Date Received: October 20, 1997 Legal Description: Lot 8 Block 2 Ea~le River ~eiKhts Subdivision Engineer: Michael E. Anderson~ P.E. ~ Anderson EnKineerinK PO Box 240773, Anchora~e~ Alaska 9952& Applicant: Julie Meyers Waiver Requested: Lot line waiver of 3 - 5 feet from the absorption field to the northern property line~ Permit Criteria: 1. Geology: A. Water Table B. Soil Sorption C. Permeability D. Water Table Gradient E. Horizontal Separation TOTAL: Points: 2. Special Conditions: 3. Other: Waiver is Granted: Waiver is NOT Granted: List Conditions or Reasons for above: Date: Rec %: #03262/&137 Amount: By: $ 11~,00 Name of Reviewer Date Paid: Oct 20; 1997 MUNI',,.II'ALITY OF .A~.tlO~ EINVIRONMEI~TAL SERVICE~ DIYJ~J(~ OCT, P RECEIVED ANDERSONiENGiNEERING P.O. BOX 240773 ANCHORAGE, AK 99524 563-7155 563'5389 (FAX) MEMORANDUM DATE: October 19, 1997 TO: Donna Meats FROM: Mike Anderson, P.E. SUBJECT: Lot 8, Block 2, Eagle River Heights Subdivision Septic System Construction Upgrade Permit The groundwater level on the subject lot was recently found to be 16' beneath the surface. We have therefore revised our design to reflect this rise in the groundwater. The total depth of the new trench will be 10' which provides 6' of separation. The new trench, however, will encroach to within 3' to 5' of the northern lot line requiring a lot line waiver. The waiver request is attached for your review. All portions of the original design package which have been affected by the new trench configuration have been revised and are attached for your review. Please review the attached information and issue the septic system upgrade permit based on the new revised design. ANDERSON,ENGINEERING P~O. BOX 2407;'3 ANCHORAGE, AK 99524 563.7155 563.5389 (FAX) October 19, 1997 Municipality of Anchorage Department of Heath & Human Services 825 "L" Street Anchorage, AK 99502-0650 Subject: Lot 8, Block 2, Eagle River Heights Subdivision Lot Line Waiver Request Dear On Site Services Engineer: The attachedSite Plan shows the location of the absorption trench to be constructed on the subject lot. Due to the small size of the lot and the conflicting 100' radii from adjacent wells it is necessary to encroach within 10' of the northern lot line. We are therefore requesting a lot line waiver be issued allowing this encroachment. Soils on the lot are conducive to an onsite system, but groundwater was found during the testhole and design phase of the project so a deep trench system is not practical in this instance. The sewer service line exits the house at a depth of 4.5'. The septic tank will be placed 45' from the house to stay outside the 100' radius of the well on the lot making the elevation of the absorption trench flow line nearly 6' below the surface. Total depth of the trench will be 10'. The total width of the the lot is only 82' with nearly 40' taken up by the protective radius from the well to the south. No easements exist along the northern property line and no development is within 20' of the line on the lot to the north. Placing the absorption trench within 3' of the line will have no adverse impact on systems currently in place or to be placed in the future. We have analyzed various scenarios conceming the length and configuration of the absorption trench for this lot and feel the 10' total depth will provide the maximum protection of the 4' separation distance from groundwater. We therefore recommend a waiver be issued to allow construction of the absorption trench to within 3' of the lot line. . _ Please let me know if you have additional questions. Sincerely, Michael E. Anderson, P.E. Attachments ANDERSON, ENGINEERiNG P o: sox ANcHOn, G'r'. 9 S24 563-.7155 563~.5389; (FAX) October 19, 1997 Municipality of Anchorage Department of Heath & Human Services 825 'L" Street Anchorage, AK 99502-0650 Subject: Lot 8, Block 2, Eagle River Heights Subdivision Septic System Design Impacts to Adjacent Properties Dear On Site Services Engineer: The existing septic tank on Lot 8, Block 2, Eagle River Heights Subdivision has collapsed and must be replaced. The absorption crib is also in failure and will be crushed and backfilied. We are therefore applying for a permit to upgrade the septic system on the lot. The attached Site Plan shows the area where the new septic tank and absorption trench are to be placed. The lots in this subdivision are small and the wells on adjacent lots restrict the area available for the upgrade. The testhole placed in the area of the proposed absorption trench revealed silty sand with some gravel with a percolation rate of 2.4 minutes per inch. Groundwater was encountered at a depth of 18' and rose to 16' during the monitoring period. We are therefore proposing placement of a 38' long by 5' wide by 4' effective depth absorption trench for disposal of septic effluent. The maximum depth of the trench will be 10' below the ground surface providing a 6' separation distance from the current groundwater level. A lot line waiver will be required to allow placement of the trench outside the protective 100' well radii in the area. The ground surface of the lot is mostly flat with only a minor drop from west to east. The existing septic tank and absorption crib will be pumped, crushed, abandoned in place and backfilled with clean material. ~'. The existing service line will be intercepted at the foundation cleanout .and realigned to the location of the new septic tank. ': * ....,. Lot 8, Block 2, Eagle River Heights · October 19, 1997 Page Two If the system is constructed as designed 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. 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. 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. 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 ..,.~.., :,. --,,,..:..... ' ' , 'CARIBOU STREET I, :~, .... ' ' /_: ,-%-. ~._.~'~ ~<- · ~. . ....... , - --.~:. /' ~- . ~..~...~.~.~;% · ,, · .. ~.~,~ ·~., ~.-/~:.-., :..: .. · · ~ F,~<~.r, ~ '= %~ ~ ' - .- ~::' -~ .... : ...... v. · ~,. · ''~~~.r~ AREA.MAP ~'~ ~i'...- ~~~ ~' .. =CA,,='.,' - ,o' ~' '~:.' - · ILDWOOD STREET . WELL . 3 BEDROOM'~OME EXISTING TANK PUMP, CRUSH AND EXISTING SEPTIC TANK AND ABSORPTION CRIB, EXISTING CRIB SITE PLAN SCALE 1" ~ 20" / NEW 38' LONG X 5"WIDE X 4' EFFECTIVE DEPTH :~ABSORPTION TRENCH LOT 8, BLOCK 2, EAGLE RIVER HEIGHTS DESIGN FACTORS: · Three Bedroom Home Perc. Rate: 2 MInJlnch Application Rate: 1.2 GPD/SF SYSTEM REQUIREMENTS: "~ 6' Wide l:rench system 1,000 Gallon .Septic Tank 4' Dralnfleld Rock 3 Bedrooms X 150 GPD I 1.2 GPDISF = 375 SF of Absorption Area 375 SF/5 LF (Widtl}) X .5 (Red. Factor) - 37.5 LF Trench Length Therefore: Construct a 5' Wide Absorption Trench Syatem With One Lateral 38' In Length with 4' of. Dralnfleld Rock Beneath the Lateral. Distribution Pipe In Trench Placed at 6.0' Below the Original Ground Surface. NOTE: TYPICAL WIDE TRENCH SECTION , ' (NO SCALE) Grade Area Over Trench to Drain Away. Minimum 3' of Cover over' Septic System. Minimum 4' Separation From Groundwater. PERFORMED FOR: DEPARTMENT OF HEALTH & HUMAN SERVIC~.S 825 "L' S~'eet, Anchorage, ~ 99502.-0650 SOILS LOG ~- PERCOLATION TEST 1 2 3- 4- 5- 6- ?- 8 10 11 13- 14- 15- 16- 17- 18' 19- 20. COMMENTS SI.OPE 0-1% ACCORDANCE WITH AU. STATE AND MU*NiCIPAL (~UIOEUNES IN EFFECT ON THIS DATE' DATE: ON-SITE WASTEWATER DISPOSAL SYSTEM CONSTRUCTION AND MATERIAL SPECIFICATIONS SUBJECT: LOT 8, BLOCK 2, EAGLE RIVER HTS. SUB. GENERAL: The scope of this project includes the procurement and placement of a new 1,000 gallon septic tank and the construction of a new 38' long by 5' wide by 4' effective depth absorption trench. The project also includes the pumping, crushing, backfilling and abandoning in place the existing septic tank and absorption crib. 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 1,000 gallon septic approved source and installed plans. tank must be procured from;;an ~-~ at the location shown.on,the_._ Lot 8, Block 2, Eagle River Heights October 7, 1997 Page Two A septic tank is to be constructed by a certified septic tank manufacturer. Construction shall include two 4" clean.uts for pumping access. 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 clean.ut shall be installed one to four feet from the building foundation. Two clean.uts 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: The drainfield shall be constructed to the dimensions shown on the design. The bottom of the trench shall be within 2" of level. 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 ge,textile fabric must be placed between the drainfield rock and the natural soil backfill. Monitor tubes must be 4' in diameter and installed at the locations shown on the design. The portion below ground must be perforated. Lot 8, Block 2, Eagle River Heights October 7, 1997 Page Three 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. 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. J 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 watertight couplings (Caulder, Fernco, or equal). with Lot 8, Block 2, Eagle River Heights October 7, 1997 Page Four 5. A permeable geotextile be installed between native soil layer. fabric (Typar, Mirafi or equal) must the final drain rock layer and the 6. All drain rock shall be .5" to 2.5" in diameter with less than 3% passing the #200 sieve. INSPECTIONS: A minimum of two inspections are required by Municipal Ordinance. 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. ~?~.J£ATER ANCUORAGE AREA rtment of Environmental Qu, 3330 "C" Street Anchorage, Alaska 99503 ,.~.~ SOILS LOG - PEROLATION TEST Performed for -~z,.Y ~x'~,~,'~: Legal Description....,,~/- y- ,.~"XFt ~ ~.~:,.,~'~ - ~ This fom reports: Soils log. / Percolation test Date Performed Depth Feet 1- 2- 3- 4- 5- 6- 7- 8- lO- ll -' 13- 14- Was ground water encountered? /lc) If yes, at what depth? Reading Date Gross Time Net Time Depth to Water Net Drop Percolation rate minute. .Proposed installat--~'n? Seupage Pit Drain Field lJcpth of Inlet ..... · Depth to bottom o-f--pit or trench £OIIIIEIITS:· ......... ~ ,i ed . ....... E¢,~- 040 (6/?4)