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Home My WebLink AboutCURRIN LT 3Currin Lot 3 #017-341-18 —aftv"ME I I A DEC 14 2012 Municipality of Anchorage Community Development Department Page 1 of 3 On -Site Water and Wastewater Program 4700 Elmore St. • P.O. Box 196650 Anchorage, AK 99519-6650 • hftp://www.muni.org/onsite • (907) 343-7904 ON-SITE WASTEWATER INSPECTION REPORT Permit Number: OSP121043 PID Number: 017-341-18 ❑ New E) Upgrade Name: Spinell Homes, Inc. ABSORPTION FIELD 0 Deep Trench El Shallow Trench E1 Bed El Mound Address 1 900 W. Northern Lights, Anchorage, AK 99517 ❑ Other Phone Number of Bedrooms Soil Rating Total depth from original grade 344-5678 4 .45GPD/SF 11.0 Ft. LEGAL DESCRIPTION Depth to pipe invert from original grade 3.0 Ft. Gravel depth beneath pipe 8.OFt. Subdivision4 C..V R-R+rJ Block Lot 4-- 7-5 Fill added above original grade 2-4 Ft. Gravel length 1 84 Ft. Township Range Section Gravel width 3Ft. Beds: Number of Lines I Distance between lines I Ft. SEPARATION DISTANCES To Septic Absorption Lift Station Holding Sewer Total absorption area Number of trenches Dist. between trenches From Tank Field Tank Line 1,344Ft2 TWO I >16Ft. well >100' >100' N/A N/A >25' TANK O Septic ❑ S.T.E.P. ❑ Holding []Other Manufacturer Anchorage Tank Capacity 1125OGal. Surface Water >100' >100' NIA NIA Material Number of compartments Lot Line >5' >10' N/A N/A Steel Two NA Foundation >5' >10' N/A NIA LIFT STATION Manufacturer Capacity Curtain Drain None Noted Gal. Remarks Pump on level at in. Pump off level at in. High water alarm at in. Pump make and model Electrical Inspections performed by Installer PIPEMATERIAL Housetotank D3034 Tankto D3034 drainfield Pomraning Excavation Drainfield HDPE CO/MT D3034 Inspector MEA BENCHMARK (Assumed elevation) 100.Oft Inspection, dates: t° 6/11/12 2 a 6/11/12 Location and description p V 6113/12 41h Back Door Stoop. COMMUNITY DEVELOPMENT DEPARTMENT APPROVAL Engineers Stamp .•••� OF ••♦� Conditional Approval: Date .•�P�'" ' � 4�� 4L = �..... ....49th.. _...fi 0 I ..... .............. ................ • MICHAEL E. ANDERSON .•� '•_�% ♦� f•1, No. CE -4381 �� TF •'•.. LSA•+=F�: Approved / /rt/ • /q"* Date Ia 1 /2� ••. ♦�4 �e; �..... Municipality of Anchorage DEVEOPMENT SERVICES DEPARTMENT 4700 Bragaw Street Anchorage, AK. 99519-6655 - 343-7904 Permit No.: OSP121043 On -Site Wastewater Disposal System or Well Inspection Report 1 10' T. & E. ESMT. S . c9. E 49th W -"-.t* E. ANDERSON PLAT N0. 83-548 CURRIN SUBDIVISION LOT 3 42,354 S.F. CURRIN CIRCLE to N ,--120.50' R=1,,,. _ Page 2 of 3 PID No. 017-341-18 A B S1 28.1' 23.4' S2 27.5' 31.2' C4 19.9' 37.1' C6 40.8' 42.5' M1 48.3' 73.3' M2 57.9' 76.0' FSV 29.6' 39.5' C5 53.9' 79.7' C7 182.6' 181.2' WellH,0 10 lHome F \ -' 1S3M G uTERNA _r c ntez Treatment System W/8A0'WL=9'vsDepWid. meaapir. Trench FSV\ THB®�� ry0 N0�. � 0 � \\\CM2 Mt ,L7° LEGE tP M1 — Monitor Tube G 2 FCO — Foundation Clean Out TH — Test Hole C5 — Clean Out FSV — Flow Splitter Valve S7 — Septic Vent T. & E. ESMT. PLAN AS -BUILT SCALE V = 50' Municipality of Anchorage Page 3 of 3 DEVEOPMENT SERVICES DEPARTMENT 4700 South Bragaw Street Anchorage, AK. 99519-6655 - 343-7904 On -Site Wastewater Disposal System or Well Inspection Report Permit Number: OSP121043 X PID No. 017-341-18 98.2 LO U 42' (Trench Length) 42' (Trench Length) PROFILE AS -BUILT No Scale 92.7 114 ANDERSON ENGINEERING P.O. BOX 240773 ANCHORAGE, AK 99524 522-7773 677-7766 (FAX) MEMORANDUM DATE: December 14, 2012 TO: Jeff Poet FROM: Mike Anderson, P.E. SUBJECT: Lot 3, Currin Subdivision Septic System Permit No. OSP121043 Substantial grading was completed on the lot prior to placement of the new absorption system. We discussed the alignment of the new absorption trenches during the first inspections and agreed placement of the trenches in a north/south direction was acceptable. The surface of the lot in the area of the new trenches was virtually flat at the time of construction. The entire absorption area remains in the accepting soils identified during the test hole exploraton and percolation testing. Alpine Drilling & Enterprises Well Log Permit Number: #SW 121048 Date of Issue: 5-21-12 Parcel Identification Number: 1734118000 Date Started: 6-20-12 Date Completed: 6-22-12 Is well located at approved permit location? x Yes ❑ No Legal Description: Currin Lot 3 Property Owner Name & Address: Grove Lawrence & Cynthia A - Spinnel Homes PO Box 222253 Anchorage, Alaska 99522 Borehole Data: Depth (ft) Method of Drilling x air rotary ❑ cable tool Soil Type, Thickness & Water Strata From To Casing type: steel Stick-up 0 2 Wall Thickness:.250 inches sill 2 4 Diameter: 6 inches Depth: 287 feet Liner Type: sandy silty gravel 4 85 Diameter: inches Depth: feet gravelly sill 85 91 Casing stickup above ground: 2 feet Static water level (from ground level): 243 feet sandy silty gravel 91 105 silt 105 121 Pumping level: 285 feet after silty gravel 121 182 2 hours pumping 20 gpm Recovery Rate: 20 gpm silt 182 201 Method of Testing: air li t gravelly silt 201 215 Well Intake Opening Type: gravel 215 230 x Open End ❑ Open Hole gravelly silt 230 235 ❑ Screened Start feet Stopped feet ❑ Perforations Start feet Stopped feet silty gravel silty water sand & gravel 235 261 261 263 Grout Type: bentonite Volume: 2 bgs Depth: Start 0 feet Stopped ? feet Pump: Intake Depth feet gravelly silt 263 282 water sand & gravel 282 287 Pump size hp Brand Name Well Disinfected Upon Completion? x Yes ❑ No Method of Disinfection: chlorine tablets Comments: Well Driller: Alpine Drilling & Enterprises PO Box 110496 Anchorage AK 99511 Development Services Department Building Safety Division �r On -Site Water & Wastewater Program *A9 4700 Elmore RoadP.O. Box 196650Mark Begich Anchorage, AK 99507 Mayor www.muni.oro/onsite (907)343-7904 Pump Installation Log Well Drilling Permit Number: SW 121048 Parcel Identification Number: 1734116000 Legal Description Lot 3 Currin Sub. Pump Installation Date: 11114/2012 Pump Intake Depth Below Top of Well Casing: 272 Pump Manufacturer's Name: crundfos Pump Model: 15 SQE-15-290 Pump Size 1 112 hp Pitless Adapter Burial Depth: N/A feet Pitless Adapter Manufacturer's Name: N/A Pitless Adapter Installer: rdA Well Disinfected Upon Completion? 0 Yes ❑ No Method of Disinfection: chlorine tablets Comments: Pump Installer Name: Aarow Pump & Well Service, LLC P.O. Box 110496 Anchorage, AK 99511-0496 feet Date of Issue: 5/21/2012 Property Owner Name & Address: Lawrence & G/nthia Gromt (.Spinel) Homes) P.O. Box 222253 Anchorage, AK 99522-2253 Attention: The pump installer shall provide a pump installation log to the DSD within 30 days of pump installation. On -Site Water & Wastewater System Permit MUNICIPALITY OF ANCHORAGE Development Services Department On -Site Water & Wastewater Program 4700 Elmore Road, PO Box 196650 Anchorage, AK 99519-6650 Telephone: (907) 343-7904 Permit Number: OSP121043 Tax Code Number: 01734118000 Work Type: WellSeptic Initial Permit Effective Dates: May 21, 2012 to May 21, 2013 Design Engineer: ANDERSON ENGINEERING Subdivision: CURRIN Site Legal Address: CURRIN LT 3 G:2937 Owner/Address: GROVE LAWRENCE & CYNTHIA A PO BOX 222253 ANCHORAGE AK 995222253 Site Mailing Address: 5020 Currin CIR, Anchorage Lot Size in Sq Ft: Total Bedrooms: This permit is for the construction of: 42354 4 Y Disposal Field Y Septic Tank N Holding Tank N Privy Y Private Well N 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 wastewater code requires inspections during the installation. The engineer must notify the Development Services Department at least 2 hours prior to each inspection. Provide notification by calling (907) 343-7904 (24 hours). 4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather must either: A. Open and Close on the same day. B. Covered, sealed, and heated to prevent freezing. Receive Issued C 0 1 rev-ses 4,kk &00"�1-e1d. Municipality of Anchorage Development Services Division On -Site Water and Wastewater Program ftelp"tt"�'t **** VARIANCE/WAIVER REVIEW **** Waiver#: OSP121127 COSA#: PID#: 017-341-18 Legal Description: Currin Lot 3 Engineer: Anderson Engineering Applicant: Lawernce & Cynthia Grove Permit#: OSP121043 Your request for a waiver of the required 50 feet horizontal separation from the absorption field to the slope steeper than 25% has been approved. The approved separation distance is 7 feet. This waiver approval applies to the existing absorption field only. Any future upgrade to the on- site wastewater disposal system will require all separation distances be met or another approval from this department. ® The affected adjacent property owner(s) have been given a notice regarding this waiver. ❑ Notarized letter(s) of nonobjection have been received from the owner(s) of the affected adjacent property. ❑ Adjacent properties are not affected by this waiver. ............................................................................. 0. Waiver is Granted: X Waiver is not Granted: Date: b l07 /,2 Approved by!l Name of Reviewer ................... Nunn............... e .............. women ........... .......... Rec#: 02056G Amount: $200.00 Date Paid: 6/11/12 **** VARIANCEMAIVER REVIEW **** MUNICIPALITY OF F Community Development Department Development Services Division–� On -Site Water & Wastewater Program Mayor Dan Sullivan ON-SITE SEWER/WELL PERMIT APPLICATION FOR A SINGLE FAMILY DWELLING Parcell.D. 017-341-18 Property owner(s): Spinell Homes, Inc. Phone: 907-343-7904 Fax: 907-343-7997 Day phone: 344-5678 Mailing address : 1900W. Northern Lts. Blvd., Suite 200 Anchorage, AK 99517 Site address: 5020 Currin Circle Anchorage, AK 99516 Legal description (Sub'd., Block & Lot): Currin, Lot 3 Legal description (Township, Range & Section) Lot Size: 42,354 Sq. Ft. Number of Bedrooms: Four (4) THIS APPLICATION IS FOR: THIS APPLICATION IS AN: (®all that apply) Initial X Absorption Field X Upgrade ❑ Septic Tank X Renewal ❑ Holding Tank ❑ Privy ❑ Private Well Water Storage ❑ 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: x'70 tel'] — Waiver Fees: Date of Payment: C129- Date of Payment: Receipt Number: Ci'1 i`l b Receipt Number: Permit No. 0`J�t� )�y3 Waiver No. C:\Users\AndEng\Desktop\Mike\Currin\Permit Application Lot 3.docC:lUsers\AndEng\Desktop\Mike\Currin\Permit Application Lot 3.doc ANDERSON ENGINEERING P.O. BOX 240773 ANCHORAGE, AK 99524 522-7773 677-7766 (FAX) April 2, 2012 Municipality of Anchorage Development Services Department On -Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Subject: Lot 3, Currin Subdivision Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of Lot 3, Currin Subdivision intends to construct a new 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. Also identified on the plans are the existing wells in the area and septic systems on surrounding lots. No conflicts exist between the proposed septic system and well or septic systems and wells on adjacent lots. 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 test hole placed on the lot in the area of the absorption trenches and alternate site indicate silty sand with gravel (SM). The percolation rate of the soil was determined to be 12 minutes per inch. No groundwater was found during the placement of the test holes and none was noted during the monitoring period. An application rate of .8 gallons per day per square foot was used in the design of the absorption system. We are proposing to place a new 1,250 -gallon septic tank and 2-38' long by 5' wide by 4' effective depth absorption trenches to treat and dispose of the effluent generated in the house. The elevation of the distribution line in the absorption trench will be 3' below the surface and the total depth will be 7'. A flow splitter valve will be placed to insure even flow to each trench. A minimum of 3' of fill or 2" of insulation and 2' of fill will be placed over the absorption trench and 4' over the septic tank. The ground surface on the lot in the area of the septic system slopes to the southwest at a shallow grade with some cross sloping from the east. The new trenches will be Lot 3, Currin Subdivision April 2, 2012 Page Two constructed parallel with the contours of the slope as much as possible in conformance with Municipal requirements. The new septic system will be constructed a minimum of 100' from all wells and any surface water and 10' the proposed and existing water services in the area. If the system is constructed in accordance with our design 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 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, Q Michael E. Anderson, P.E. Attachments 0 49th MICHAEL E. ANDERSON . No. CE -4381 I I I i , I 1 I I I I I I I (\J I I I TRACT A I I I I I I I I I I I I I c I I C------------------------------------------------------------------------------- ---------------------- ------------------------------------------- __}__r______ ; 1 1 I I 1 I I I I I 1 I n I i E.isling WNI f 2A \ / I • 1 \ / 1 hotwa wl \ � I Eistin9 "I 1 1 I I I0 � P 1------------ 5 1 1 ^ I 1 LII I I 1 I I I. , I , I ' 1 I 1 I I I 1 1 v 1 I I , I 1 I , I 1 I I II �.•'E OF q vc `p................... � G�: :' 1♦ GRIFFIN i 49th ♦� % ............................... ..... .........ICHA..LE.............ON.Q AREA MAP �'; MICHAEL E. ANDERSON : � % 4 %♦♦ �••.• NO. CE-4361 .'�'_/ ♦♦TF •.N-3�� ♦44? P .......... P� SCALE 1" = IDD' fh ,N 5;,�� Col PLAT NO. 83-548 CURRIN SUBDIVISION LOT 3 42,354 S.F. / CURRIN CIRCLE N ` \ 700.00. Cis ^ ° I Proposed Well r ✓, m i u THA _— is/ u o' j Four Bedroom / �o / \\ \ Home / ��• 100• 5° \ 1,250 Gallon'- \ ° y 4�2F• Septic Tank sy \f i \ zco \+ 2-38-Long_x 5' Wye_— rsv \ Ca 4• Effective th \ o adsorption Trenc es \ S N Aavenlex ireot ent system ti THB}• wme , co N"o 48 Efroctrre Existing well '� enptn pe ® MI \i b s N 1 i Existing Well \ / P / 20' T. & E. ESMT. \\ / 92' \\ NOTE: ScWater is Within ystem. th Nit Any Portof New Septic S ---.��+�-�.........,q♦. •• LEGEND �: �� MT - Monitor Tube FCO Foundation Clean Out ;l 49th °: - TH — Test Hole �.....: .............. ..... :.....� CO - Clean Out %Kd FSV - Flow Splitter Valve i.... v-- ... ��'....DCHAELE.AN........N-'".. :MICHAEL E. ANDERSON �. ' SITE PLAN �I u, No. CE -4381 � �♦ Thr, •. `jJ 04w SCALE 1" = 50' �114111,MOFESSI�� LOT 3, CURRIN SUBDIVISION DESIGN FACTORS: SYSTEM REQUIREMENTS Four Bedroom Home Deep Trench System Perc. Rate: 40 Min./inch 1,250 Gallon Septic Tank Application Rate: .45 GPD/SF 8' Drainfield Rock 4 Bedrooms' 150 GPD/Bedroom = 600 SF Absorption Area 600 SF/.45 GPD/SF/16 SF/LF = 83.3 LF Trench Length THEREFORE: Construct 2-42' Long x 3' Wide x 8' Effective Depth Absorption Trenches. Flow Line Elevation in Trenches to be 3' Below Original Ground Surface. Total Depth to be 11' Below Existing Ground. Provide 3' Cover Over Absorption Trench and 4' Cover Over Septic Tank. Place Flow Splitter Valve to Insure Even Flow to Each Trench. 3' TYPICAL DEEP TRENCH SECTION (NO SCALE) i� NOTE: Grade Area Over Trench to Drain Away. Minimum 6' Separation From Bedrock. 0 ...... Minimum 4' Separation From Groundwater. 0011/1 �...... Minimum 100' Separation From Private Wells in the Area. � m' Minimum 100' Separation From Surface Water or Streams. ��I M. MICHAEL E. ANDERSON No. CE4381 13 MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT 4700 ELMORE ROAD ANCHORAGE, AK 99519-6650 SOILS LOG - PERCOLATION TEST LEGAL DESCRIPTION: LOT 3, CURRIN SUB PERFORMED FOR: SPINELL HOMES DATE: 5/30/2012 PROJECT No.: PARCEL ID#: TECHNICIAN: DEPTH (feet) I 2 READING TEST HOLE B OB/OG NET TIME (MINUTES) 3 1F YES @ WHAT DEPTH? - ,S TEST HOLE PRESOAKED PRIOR TO TESTING: DEPTH OF WATER AFTER MONITORING: NONE L ML 4 DATE OF MONITORING: 6/4/2012 0 0 BROWN SANDY SILT SOME GRAVEL 5 30 5.75" 6 3 7 5.25" 8 4 9 30 6.00" M. ANDERSON SLOPE e't :•- y *? 49MI :MIc►ANDM s : 4361 feP •..... X. I!._'fdrrs tOt*. Yt SITE PLAN SEE SITE PLAN r x i 10 READING WAS GROUND WATER ENCOUNTERED? NO NET TIME (MINUTES) DEPTH To WATER (INCHES) 1F YES @ WHAT DEPTH? - ,S TEST HOLE PRESOAKED PRIOR TO TESTING: DEPTH OF WATER AFTER MONITORING: NONE L 11 3:00 DATE OF MONITORING: 6/4/2012 0 0 I 17 1 COMMENTS: Test Hole Pre Soaked Prior to Test. DATE READING GROSS TIME (MINUTES) NET TIME (MINUTES) DEPTH To WATER (INCHES) NET DROP (INCHES) TEST HOLE PRESOAKED PRIOR TO TESTING: 6/1 1 3:00 5.00" 2 3:30 30 5.75" .75" 3 3:32 5.25" 4 4:02 30 6.00" .75" 5 4:04 5.50" 6 4:34 30 3.25" .75" PERCOLATION RATE:: 40 (MIN/INCH) PERC. HOLE DIA.. 10° (INCHES) TEST RUN BETWEEN: 4 FT. and 5 FT. 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: 6/2/2012 MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT 4700 ELMORE ROAD ANCHORAGE, AK 99519-6650 SOILS LOG - PERCOLATION TEST LEGAL DESCRIPTION: LOT 3, CURRIN SUB PERFORMED FOR: SPINELL HOMES DATE: 3/1/12 PROJECT No.: PARCEL ID#: TECHNICIAN: B. SCHILLER DEPTH TEST HOLE HOLE AA (feet) 1 OB/OG 2 3 SM 4 BROWN SILTY SAND 5 6 7 8 9 SLOPE 49IN* _ AEL L ASN: CQ ; C,E*4381- .ate SITE PLAN SEE SITE PLAN u i 14 BOH 15- 16- 17- 18- 19- COMMENTS: 516171819 COMMENTS: Test Hole Pre Soaked Prior to DATE READING WAS GROUND WATER ENCOUNTERED? NO 10 DEPTH To WATER (INCHES) NET DROP (INCHES) TEST HOLE PRESOAKED PRIOR TO TESTING: IF YES Q WHATDEPTH? - „S 1 4:25 DEPTH OF WATER AFTER MONITORING: NONE 11 DATE OF MONITORING: 4/2/12 O 0 14 BOH 15- 16- 17- 18- 19- COMMENTS: 516171819 COMMENTS: Test Hole Pre Soaked Prior to DATE READING GROSS TIME (MINUTES) NET TIME (MINUTES) DEPTH To WATER (INCHES) NET DROP (INCHES) TEST HOLE PRESOAKED PRIOR TO TESTING: 3/1 1 4:25 4.0" 2 4:55 30 6-1/2" 2-1/2" 3 4:56 4-1/4" 4 5:26 30 6-3/4" 2-1/2" 5 5:27 4-1/8" 6 5:57 30 6-5/8" 2-1/2" PERCOLATION RATE: 12 (MIN/INCH) PERC. HOLE DIA. 8° (INCHES) TEST RUN BETWEEN: 4 FT. and 5 FT. 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: 4/2/2012 CoJ ANDERSON ENGINEERING P.O. BOX 240773 ANCHORAGE, AK 99524 522-7773 677-7766 F June 6, 2012 Municipality of Anchorage 5 a[ of 11'a—+ Development Services Department On -Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Subject: Lot 3, Currin Subdivision Absorption Trench to Slope Waiver Dear Onsite Services Engineer: The absorption trenches on Lot 3, Currin Subdivision are proposed for construction near a 33% slope which extends onto the neighboring property for a total drop of approximately 14'. This slope only slightly exceeds the allowable 25% break in grade. The end of the closest trench is 7' from the top of the slope. The other active trench is 13' and the alternate site is 11.5' from the top. In every case the 25% imaginary slope when extended from 2' above the effluent distribution line does not daylight to existing ground. We therefore request a waiver be issued allowing the trenches to be placed at the proposed locations. Sincerely, W44_j � F'-a�� Michael E. Anderson, P.E. 001 • �33ry/y�111 ��* } a off l 0 V00 s-' S'�T •.w 4a 00 VA asoo }sioM 0 `o adois o} }sasoo youaal aaddn In LO 1 o Z CD w I 5; U) d) C (J� m w aui� A}jadoad N D (n cn o Q o LD z C- w Ln� m 1p o � J o U I Ln 1 0 N L O Ln O O Ln O M N N Ln O u1 0 ON-SITE WASTEWATER DISPOSAL SYSTEM CONSTRUCTION AND MATERIAL SPECIFICATIONS SUBJECT: LOT 3, CURRIN SUBDIVISION GENERAL: 1. 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 2 new 38' long X 5' wide X 4' effective depth absorption trenches at the location also shown on the Site Plan. The distribution line in the trenches will be placed at 3' below the existing ground surface. Total depth of the trenches will be 7' below the existing ground surface. The new absorption trenches and septic tank must be placed a minimum of 100' from all private wells and any surface water in the area and 10' from the water service line proposed for the lot. A minimum of 3' of cover is required over the absorption trench and 4' of cover over the septic tank. A flow splitter valve must be placed to insure even flow to each trench. 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. The Contractor must also verify the location of wells in the area and assure that the separation distances are met. 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 Building Safety Division On -Site Water and Wastewater Program for system installations. Owners installing their own systems must receive prior approval from the On -Site Water and Wastewater Program. before beginning system installation. SEPTIC TANK INSTALLATION 1. A new 1,250 -gallon septic tank must be procured from an approved source and installed at the location shown. 2. A septic tank is to be constructed by a certified septic tank manufacturer. Construction shall include two 4" cleanouts for pumping access. Lot 3, Currin Subdivision April 2, 2012 Page 2 of 3 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. 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 trench to drain away. 8. A minimum 2' of accepting soil is required below the drainfield rock for a 5' wide trench. All pockets of unacceptable materials must be removed and replaced. Lot 3, Currin Subdivision April 2, 2012 Page 3 of 3 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, 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. • Municipality of Anchorage On -Site Water and Wastewater Program (907)343-7904 Certificate of On -Site Systems Approval Parcel I.D. 017-341-18 1. GENERAL INFORMATION Complete legal deesseription Currin, Lot 3 Location (site ad -dress) Currin Circle Current Property owner(s) Spinell Homes, Inc. Day phone 344-5678 1900 W. Northern Lights Blvd. Anchorage, AK 99517 r/g 9 70 1j'2 ;# RWSH! Ay o N a a � 30 Expiration Date: J� Anchorage, AK Mailing address Real Estate Agent 2. TYPE OF DWELLING: E] Single Family (w/wo ADU) ❑ Duplex ❑ Multiple Dwellings (Single Family and/or Duplex) Day phone 3. NUMBER OF BEDROOMS: Four 4. TYPE OF WATER SUPPLY: TYPE OF WASTEWATER DISPOSAL: Individual Well 0 Individual 0 Individual Water Storage ❑ Holding Tank ❑ Community Class Well ❑ Community ❑ Public Water System ❑ Public Sewer ❑ WaiverNariance request for: Received by: " C_ Date: COSA to be released to the engineer, unless otherwise requested by the engineer. COSA Fee $ %sem 51 ^ )2w k Waiver Fee $ Date of Payment l (ci1a!2� Date of Payment Receipt Number 01 --) aS G Receipt Number COSA # (YDG I a 1 S1 a Waiver # 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, based on procedures outlined in the Certificate of On -Site Systems Approval Guidelines for this application, shows that the on-site water supply and/or wastewater disposal system is (are) 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(are) in compliance with all applicable Municipal and State codes, ordinances, and regulations in effect at the time of installation. Name of Firm Anderson Engineering Address P.O. Box 240773 Anchorage, AK 99524 Engineer's Printed Name Michael E. Anderson, P.E. 6. DSD SIGNATURE System #1 Approved for A_ bedrooms System #2 Approved for bedrooms Disapproved Conditional approval for Phone 522-7773 bedrooms, with the following stipulations: By: K/ �J Original Certificate Date: The Munici ality of chorege Development Services Division (DSD) issues Certificates of On -Site Systems Approval (COSA) based only upon the representations given in paragraph 5 by an independent professional dull engineer registered in the State of Alaska. The Municipality of Anchorage is not responsible for errors or omissions in the professional engineer's work. 7. ATTACHMENTS: COSA Checklist X Nitrate Advisory Septic System Advisory Arsenic Advisory Well Flow Advisory Other COSA blue sheet E - , c If more than 1 septic system is on the lot: COSA Checklist # _of _ Structure served by this system Certificate of On -Site Systems Approval Checklist Legal Description: Currin Subdivision, Lot 3 A. WELL DATA Well type Private If A, B, or C provide PWSID # Date completed 6/22/12 Sanitary seal (Y/N) Y Total depth 287 ft. Cased to 287 ft. FROM WELL LOG Date of test 6/22/12 Static water level 243 ft. Well production 20 9-13 m_ WATER SAMPLE RESULTS: Coliform 0 colonies/100 mL Nitrate 1.71 mg/L Arsenic 14/-0 ug/L Dateofsample: 12/11/12 Parcel ID: 017-341-18 Well Log (Y/N) Y Wires properly protected (Y/N) Y Casing height (above ground) >18 in. AT INSPECTION ft. Collected by: M. Anderson B. SEPTIC/HOLDING TANK DATA Tank Type/Material Septic/Steel Date installed 6/11/2012 Tank size 1,250 gal. Number of Compartments 2 Cleanouts (Y/N) Y Foundation cleanout (Y/N) Y Depression over tank (Y/N) N High water alarm (Y/N) Date of pumping New Pumper Construction C. ABSORPTION FIELD DATA N Date installed 6/11/12 Soil rating (g.p.d./ft2 orft2/bdrm) .45 GPD System type Deep Trench Length 84 ft. Width 3 ft. Gravel below pipe 8 ft. Total depth 13-14 ft. Eff. absorption area 1,344 ft2 Monitoring tube Y Depression over field N Date of adequacy test New Const. Results (Pass/Fail) For _ bedrooms Fluid depth in absorption field before test in. Water added gal. New depth in. Elapsed Time: min. Final fluid depth in. Absorption rate >= g.p.d. Any rejuvenation treatment (past 12 mo.) (Y/N & type) If yes, give date D. LIFT STATION Date installed "Pump on" level at in. Datum E. SEPARATION DISTANCES WELL ON LOT TO: Size in gallons Manhole/Access (Y/N) "Pump off' level at in. High water alarm level at in. Cycles tested Meets alarm & circuit requirements? Septic tank/lift station on lot >1 00' Absorption field on lot >100' Public sewer main N/A Sewer /septic service line >25' Animal containment areas >50' SEPTIC/HOLDING TANK ON LOT TO: On adjacent lots >100' On adjacent lots >1 00' Public sewer manhole/cleanout N/A Holding tank N/A Manure/animal excrete storage areas >100' Building foundation >5, Property line >5' Water main > 10' Water service line >10' Wells on adjacent lots >100' ABSORPTION FIELD ON LOT TO: Property line >10' Building foundation >10' Water Service line >10' Surface water >100' Curtain drain None Noted Wells on adjacent lots >100' F. COMMENTS G. ENGINEER'S CERTIFICATION I certify that I have determined through field inspections and review of Municipal records that the above systems are in conformance with MOA COSA guidelines in effect on this date. Engineer's Printed Name Michael E. Anderson, P.E. Date 12/19/2012 COSA brown sheet 10-10-12.doc Absorption field >51 Surface water >100' Water main >10' Driveway, parking/vehicle storage >1 0' PLAT NO. 83-548 CURRIN SUBDIVISION LOT 3 42,354 S.F. CURRIN CIRC`= in a 3 6.+ v 1 L. V 11 lql7 L/ L- l r%I L - SCALE: 1"=20' GASTALDI LAND SURVEYING, LLC JEFF A. GASTALDI, R.L.S. 2000 E. DOWUNG RD., SUITE 8 ANCHORAGE, ALASKA 99507 PHONE 248-5454 GRID DATE SW2937 7/31/2012 F.B. JOB N0. CURRIN3 I HEREBY CERTIFY THAT I HAVE SURVEYED THE PROPERTY DEPICTED ABOVE AND THAT NO ENCROACHMENTS EXIST EXCEPT AS INDICATED. IT IS THE RESPONSIBILITY OF THE OWNER TO DETERMINE THE EXISTENCE OF ANY EASEMENTS, COVENANTS OR RESTRICTIONS WHICH DO NOT APPEAR ON THE RECORDED SUBDIVISION PLAT. UNDER NO CIRCUMSTANCES SHOULD ANY DATA HEREON BE USED FOR CONSTRUCTION OR FOR ESTABLISHING BOUNDARY OR FENCE LINES. ANCHORAGE RECORDING DISTRICT, ALASKA NOTE: NO CORNERS SET THIS DATE. ♦'*wsraoo OF A •� .�•� .` 49TH y� eeseoe.. eseee •.p . Jeffery A. Gastaidia LS -6091 •.'� m�AlF At 16� 40 apr .ee .• Pd . def®rsVAss* s 11 40'