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HomeMy WebLinkAboutT15N R2W SEC 25 LT 112T15N R2W Sec. 25 Lot 112 #051-283-19 MUNICIPALITY OF ANCHORAGE Community Development Department ~//.~ Phone: 907-343-7904 Development Services Division ~ Fax: 907-343-7997 On-Site Water & Wastewater Program Mayor Dan SulEvat~ ON-SITE SEWER/VVELL PERMIT APPLICATION FOR A SINGLE FAMILY DWELLING Parcel I.D. 05t-283-19 Property owner(s): Troy Davis Homes, Inc. Day phone: 357-9394 Mailing address: t66 E. Parks Highway, Wasilla, AK 99654 Site address: 17765 Almdale Avenue Eagle River, A.~ Legal description (Sub'd., Block & Lot): B.,J, JYrLot 112, Sect[on 25, TtSN, R2W Legal description (Township, Range & Section) Lot Size: 108,900 Acres Number of Bedrooms: Four (4) THIS APPLICATION IS FOR: (~;~ all that apply) Absorption Field X Septic Tank X Holding Tank [] Privy [] Private Well X Water Storage [] THIS APPLICATION IS AN: Initial X Upgrade [] Renewal [] THIS APPLICATION INCLUDES A VARIANCE / WAIVER REQUEST FOR: 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/Rush Fees: Date of Payment: Receipt Number: Permit No. *¢ 171/ Waiver Fees: Date of Payment: Receipt Number: Waiver No. C:~,Users~And Eng\Desktop\Mike\T15N Lot 112\Permit Application Lot 112.d ocC:\Users~AndEng\Desktop~Mike\Tl5N Lo[ 112\Permit Application Lot 112.doc ANDERSON ENGINEERING P,O, BOX 240773 ANCHO~GEi AK 99524 7766 (F~) 522-7773 677~ August 21, 2012 Municipality of Anchorage Development Services Department On-Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Subject: Lot 112, T15N, R2W, Section 25 Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of Lot 112, T15N, R2W, Section 25 intends to construct a four bedroom home on the lot. We are therefore requesting a permit be issued for the construction of a new well and septic system to accommodate the home. The attached Site Plan and backup documentation identify the location and configuration of the proposed well and septic system along with the alternate site. No existing wells are closer than 100' from the proposed septic system. Drainage arrows are shown on the site plan showing the grade and direction of flow on the lot. The drainage pattern will not be changed as a result of this project. The new septic system will be placed more than 25' outside the area identified as Class D Wetlands. No final determination has been made regarding the presence of wetlands on this lot, but is currently ongoing. The test holes placed on the lot in the area of the absorption trenches indicated gravel with sand and silt (GM). The percolation rate of the soil was determined to be 1.2 to 13.3 minutes per inch. Groundwater was found during the placement of the test holes at depths of 8' and 10' and stabilized at these levels during the monitoring period. An application rate of .8 gallons per day per square foot was used in the design of the absorption system and the trenches will be centered around Test Hole No. 2. We are proposing to place a new 1,500-gallon STEP tank and a total of 106' long by 5' wide by 2' effective depth absorption trenches to treat and dispose of the effluent generated in the house. The elevation of the distribution line in the absorption trenches will be 1' below the surface and the total depth will be 3'. A minimum of 3' of fill or 2" of insulation and 2' of fill will be placed over the absorption trenches and 4' over the STEP tank. The ground surface on the Jot in the area of the absorption trenches slopes to the south Lot 112, T15N, R2W, Section 25 August 2'1, 2012 Page Tw~ and wes~at a~appro~imating 2%. The new trenches will be constructed parallel with th~slop~'s"~'d'ch a~' possible in conformance wit,h, Municipal requirements. The new sep~[l~.~~constructed a minimum of 100 from all wells and any surface water and 10' r~m the proposed and existing water services 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 93 N89'49'lO"W 328.91 11 APPROXIMATE CLASS D WETLAND BOUNDARY ~ NOTE: No Separation Distance Conflicts Between the Well and Septic System on This Lot and ]hose on Adjacent Lots. NOTE'. Well Radius and Easement Une to be Staked by a Registered Land Surveyor Prior to Construction. 3 DPD/SF ApplicaUon Rate. / / 1,500 Gallon LEGEND MT - Monitor Tube FCO - Foundation Cleon Out TH - Test Hole CO - Clean Out MH - Man Hole \ \ \ \ / / / / / 8 S89'49'50"E 528.91 ALMDALE AVENUE NOTE: No Areas of Excessive Slope or Surface Water are WibS[n 100' of Any Par[ of the New Septic System. SITE PLAN i"~ ::: 49~:h MICHAEL E, ANDERSBN No, CE-438! SCALE 1' = 50' BLM LOT 198A, SECTION 18, T15N, R1W DESIGN FACTORS: SYSTEM REQUIREMENTS: Four Bedroom Home 5' Wide Trench System Perc, Rate: 13.3 Min./Inch 1,500 Gallon STEP Tank Application Rate: .8 GPD/SF 2' Drainfield Rock 4 Bedrooms X 150 GPD/.8 GPD/SF (Application Rate) = 750 SF Absorption Area 750 SF/5 SF/LF*.70 (Red. Factor) = 105 LF Trench Length THEREFORE: Construct a 2-53' Long x 5' Wide x 2' Effective Depth Aborption Trenches at the Location Shown. Flow Line Elevation in Trenches to be 1' Below Original Ground Surface. Total Depth to be 3' Below Existing Ground. Provide 3' of Cover Over Trenches and 4' Over Tank or Provide 2" of Insulation and 2' of Cover. Maintain 10' Separation From Water Services in the Area. Natural Backfill Topsoil and Seed -- Geotextile Fabric 4" Perforated -- PVC (Holes Down) -- Drainfield Rock 5~ TYPICAL DEEP TRENCH SECTION -- NOTE' Grade Area Over Trench to Dra'n Away ' . . , . Mlmmum 6 Separation From Bedrock. Minimum 4' Separation From Groundwater. Minimum 100' Separation From Private Wells in the Area. Mimmum. . 100, Separation. From Surface Water or Streams.. · Mlmmum 10 Separation From Water Service L~ne. ~700 MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT BRAGAW STREET ANCHORAGE, AK g951c)-6650 LEGAL DESCRIPTION: PERFORMED FOR: DATE: 7/50/12 PARCEL ID#: DEPTH (feet) OB/OG 1 2 3 4 5 SILTY SAND WITH GRAVEL 6 SM ? 8 9 SOILS LOG - PERCOLATION TEST BLh'I LOT 112, TISN, R2W, SECTION 25 1i TROY DAVIS HOMES. INC. PROJECT No.: TECHNICIAN: TEST HOLE 1 ] WAS GROUND WATER ENCOUNTERED? __ IF YES ~ WHAT DEPTHV DEPTH OF WATER AFTER MONITORING: 20¸ B0H @ 15' JKB SLOPE YES DATE OF MONITORING: 8/8/2012 ~ SITE PLAN SEE SITE PLAN DEPTH TO DATE READING GROSS TIME NET TIME WATER NET DROP (I'"IINUTES) (~'IINUTES) (INCHES) (INCHES) TEST HOLE PRESOAKED PRIOR TO TESTING: 8/3 1 1:12 3.00" 2 1:42 30 5.25" 2.25" 3 1:43 2.88" 4 2:13 30 5.13" 2.25" 5 2:14 2.50" 6 2:44 30 4.75" 2.25" PERCOLATIONSt&TE: 13.3 .C~rNnNCH) PERC. HOLE DIA. 6" (iNCHES) TEST RUN BETWEEN: 5.0 FT. and 6.0 FT. COMMENTS: TEST HOLE PRE SOAKED PRIOR TO TEST. TEST PERFORMED BY ANDERSON ENGINEERING. I, MICHAEL E. ANDERSON CERTIFY THAT THIS WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES IN EFFECT ON THIS DATE:. 8/8/12 A700 DEPTH (fe~t) 1 2 3 4 5 6 g 9 11 20¸ MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT BRAGAW STREET ANCHORAGE, AK 99519-6650 SOILS LOG - PERCOLATION TEST LEGAL DESCRIPTION: BLP1 LOT 112, TISN, R2W, SECTION 25 PERFORMED FOR: DATE: 7/30/12 PARCEL ID#: d K B OB/OG SILTY SAND WITH GRAVEL SH BOH @ I1' TROY DAVIS HOMES. INC. PROJECT No.: TECHNICIAN: TEST HOLE 2 ] WAS GROUND WATER ENCOUNTERED? __ IF YES ~ WHAT DEPTH? 8' DEPTH OF WATER AFTER MON]TOPdNG: 8' DATE OF MONITORING: 8/8/2012 SLOPE YES SITE PLAN SEE SITE PLAN DEPTH TO DATE READING GROSS TIME NET TIME WATER NET DROP (MINUTES) (MINUTES) (INCHES) (INCHES) TEST HOLE PRESOAKED PRIOR TO TESTING: 8/3 I 1:17/1:27 10 1.25"/9.75" 8.50" 2 1:28/1:38 10 1.5o"/]o.oo'8.50" 3 1:39/1:49 l0 1.25"/9.75" 8.50" 4 1:50/2:00 10 1.oo"/9.5o" 8.50" 5 2:01/2:11 10 l.SO"/lo.oo' 8.50" 6 2:12/2:22 10 1.oo"/9.5o" 8.50" PERCOLATION RATE:I.2 (MIN/INCH) PERC. HOLEDIA. 6" ~INCHES) TEST RUN BETWEEN: 3.0 FT. and 4.0 FT. COMlvlENTS: TEST HOLE PRE SOAKED PRIOR TO TEST. TEST PERFORMED BY ANDERSON ENGINEERING. I, MICHAEL E. ANDERSON CERTIFY THAT THIS WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES IN EFFECT ON THIS DATE 8/8/12 MUNICIPALITY OF ANCHORAGE Development Services Department Phone: (907)343-7904 On -Site Water & Wastewater Section Fax: (907)343-7997 Parcel ID 051-283-19 Certificate of On -Site Systems Approval OSC251177 Expiration Date: Legal description T15N R2W SEC 25 LT 112 1 site address 17765 ALMDALE AVE Current property owner(s) RIOS-ANDERSEN LEONARDO M & X The On -site system(s) is/are approved for 4 bedrooms Conditional approval for bedrooms, with the following stipulations: Comments or conditions: M This Certificate of On -Site Systems Approval (COSA) is intended to demonstrate the subject system(s) is/are in substantial compliance with municipal code. The Municipality of Anchorage, Development Service Department (DSD) issues COSAs based upon representations provided by an independent professional engineer. The Municipality of Anchorage is not responsible for errors or omissions in the professional engineer's submittal. ATTACHMENTS: COSA Checklist X Well Flow Advisory Absorption Field Advisory Nitrate Advisory Tank Age Advisory Arsenic Advisory Other W Development Services Department Phone: 907-343-7904 On -Site Water & Wastewater Section Fax: 907-343-7997 Certificate of On -Site Systems Approval Application 1. GENERAL INFORMATION Parcel I.D. 051-283-19 Complete legal description Location (site address) T15N R2W SEC 25 LOT 112 17765 ALMDALE Current property owner(s) 2. ON -SITE SYSTEMS SIZED FOR 4 BEDROOMS Day phone 3. TYPE OF WATER SUPPLY: X Private Well serving # dwelling units EJ Other Non-public well as regulated by MOA ❑ Water Storage F-1 Community Well or Public 4. TYPE OF WASTEWATER DISPOSAL: FEW Private Septic F Private Septic serving 2 dwelling units El Holding Tank ❑ Community Septic or Public Sewer 5. SEPTIC TANK: X Steel R Plastic n Concrete n Fiberglass Age 13 - See advisory if steel or fiberglass older than 20 years 6. ABSORPTION FIELD: F] AWWTS E] Bed M Deep Trench FE-1 Wide Trench E] Seepage Pit Waiver request for: Expedited review requested: ❑ Distance: By applying for this entitlement, this property is subject to inspection by municipal On -site staff to verify the accuracy of the information provided. — C) () COSA Fee $ 5T) Waiver Fee $ Date of Payment Date of Payment COSA # OSC�,S-1 177 Waiver # COSA Application—Apr2026.doc COSA Checklist Legal Description: T15N, R2W, SECTION 25, LOT 112 Parcel ID: 051-283-19 If more than 1 weft and/or septic system on lot, provide separate checklist. Structure served by this system A. WELL DATA © Well log is filed with Onsite (or attached) Date drilled 9/20/12 Total depth 305 ft Cased to 83 ft ® Sanitary seal is functioning correctly Wires are properly protected Casing height (above ground) 36 in. Date of flow test for COSA 4/14/25 Static water level at beginning of test 44 ft. Comments B. TANK DATA Measured operating fluid level in septic tank 42 Date of pumping 6/23/25 ❑ Required maintenance completed, if AWWTS Comments: D. ABSORPTION FIELD DATA Which system tested (date installed) 917/12 9 ALL standpipes present per record drawing Total measured depth from grade 6 ft (max) Measured depth to pipe invert from grade ft (min) © N/A -- pressurized field. ❑ Per record drawings, field is insulated. W Monitor tubes go to bottom of effective. If not, state depth into effective ❑ Presoaked required if (Required if house vacant or field not used for more than 30 days prior to date of test) Gallons introduced gallons date Any rejuvenation treatment (past 12 months) If yes, enter date Comments/Deficiencies: COSA Checklist June 2022 Well production at time of test 3+ gpm Water storage tank volume 0 gallons Well disinfected for coliform test? ❑ Yes © No © Cofiform bacteria is Negative Nitrate mg/L 0 Nitrate less than MRL (ND) Arsenic ug/L Q Arsenic less than MRL (ND) Collected by MNA Date 4/14/25 C. LIFT STATION 9 Required maintenance completed Age of lift station 13 years Lift station material STEEL Comments: Adequacy test date 4/14/25 Results © Pass Fluid depth prior to test 14 in Water added 600 gal New fluid depth 19 in Elapsed time 1440 min Final fluid depth 14 in Absorption rate 600 and FIELD STATUS — POST RECOVERY Effective depth (per record drawings) 24 in Effective depth used 14 in Effective depth remaining 10 in E. SEPARATION DISTANCES From Private Well on Lot to: (Please enter distances if less than required or if community well on lot) Septic Tank/Lift Station on Lot > 100' Community Sewer Manhole/Cleanout > 100' Yes if No ft Mn Yes if No ft Neighboring Tank > 100' Yes if No ft Private Sewer/Septic Line > 25' Q Yes if No ft Absorption Field on Lot > 100' 0 Yes if No ft Holding Tank > 100' Q Yes if No ft Neighboring Absorption Fields > 100' Animal Containment > 50' © Yes if No ft Yes if No ft Manure/Animal Excreta Storage > 100' Community Sewer Main > 75' E Yes if No ft no Yes if No ft ❑ N/A — Served by Community Well (not on lot) or Public Water From Septic/Holding Tank and Absorption Field(s) on Lot to: (Please enter distances if less than required) Building Foundations > 10' Yes if No ft Surface Water > 100' Q Yes if No ft Tank to Property Line > 5' Yes if No ft Wells on Adjacent Lots: Field to Property Line > 10' M Yes if No ft Private Wells > 100' Yes if No ft Water Main > 10' Water Service Line > 10' F. ENGINEER'S COMMENTS n Yes if No ft E Yes if No ft Community Wells > 200' Q Yes if No ft If tank or field is under driveway comment below G. CERTIFICATION & 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, based on procedures outlined in the Certificate of On -Site Systems Approval Guidelines, indicates that the on -site water supply and/or wastewater disposal system appears to comply with applicable Municipal and State codes, ordinances, and regulations in effect at the time of installation, unless noted otherwise. Name of Firm A Phone 727-8864 Engineer's Printed Name �! 0Vt-G.0, Date �!(r, a L<- ... Z X�• �... ♦,r........e MICHAEL N. A;NDERSON �t? CE - 94 9 -,0 COSA Checklist -June 2022 MUNICIPALITY OF ANCHORAGE Development Services Department Phone: 907-343-7904 On -Site Water & Wastewater Section - Fax: 907-343-7997 Lift Station/Pump Vault Maintenance Log (n� I ` Owner �, o -fin d e,. Street Address � %?%S- M"-\ Septic Tank: -Sludge level inches -Pumping: required es no -Pumping completed yes no Lift station: -Pump basket cleaned kesnoo -Effluent filter cleaned es no -Control floats cleaned •Proper float settings confirmed 44no -Operation satisfactory 60 no Alarm System: -Dedicated electrical alarm circuit des no -Audible and visual alarm inside dwelling a no -Alarm system operation atisfacto not satisfacto Manhole Riser -Groundwater intrusion at riser to tank connection yes no -Ground water intrusion around pipe penetrations es o -Weep hole functional <a no -Manhole lid: Functional a no Insulated es no Properly Secured es no Other -All manufacturer required inspections and maintenance completed yes no Comments: Qualified Maintenance Provider: Technician )-o.rc-y W r3e. 'S Jr- Date of maintenance,23 Supe A5 Company Signature as Date 3 3%jn*-5 2 8. 7 ' 6 9 .5 ' 1 0 . 2 ' 2 9 .3' 3 6 . 3 ' 1 3 .0' 2 . 0 ' 2 4 .3' 4 . 4 ' 1 8 .3 ' 8 . 0 '1 4 .3 ' 1 4 . 0' 11 .0 ' 8'x8' SHED 14'x32' SHED R O O F O V E R H A N G R E S I D E N C E LEGEND DECK CONCRETE OVERHEAD UTILITIES POWER POLE EDGE OF ASPHALT RECORD DATA PER BLM SUBDIVISION OF SEPTIC PIPE WELL SEPTIC TANK LID SECTIONS 13 & 25, T15N, R2W, ACCEPTED AUGUST 26, 1954 TIMBERLINE SURVEYING AND MAPPING 17035 BARONOFF AVE EAGLE RIVER, AK 99577 907-242-5320 ryan@timberlinealaska.com FILE NO.: 25.150 SCALE: 1" = 40 FEET DATE: 6/23/2025 SHEET: 1 of 1 MOA GRID: NW0753 SCALE: 1" = 40 FEET(11"x17") 40'0' 80' AS-BUILT OF: ADDRESS: 17765 ALMDALE AVE LOCATED IN: ANCHORAGE RECORDING DISTRICT GOV. LOT 112SECTION 25T15N, R2W, S.M., AK