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HomeMy WebLinkAboutLAKE HILL ACRES #1 LT 35 Municipality of Anchorage On -Site Water and Wastewater Section • (907) 343-7904 Page of ON-SITE WASTEWATER INSPECTION REPORT Permit Number: OSP221157 PID Number: 051-052-28 Dwelling: ® Single Family (SF) ❑ with ADU ❑ Duplex (D) ❑ Two Single Family Project: ❑ New ® Upgrade Name MALCOLM RAY ABSORPTION FIELD - EXISTING ❑ Deep Trench ❑ Wide Trench ❑ Bed ❑ Mound ❑ Other Site Address 22625 LAKE HILL DRIVE, CHUGIAK Phone Number of Bedrooms 5 Soil Rating GPD/SF Total depth from original grade Ft. LEGAL DESCRIPTION Depth to pipe invert from original grade Ft. Gravel depth beneath pipe Ft. Subdivision Block Lot LAKE HILL ACRES #1 35 Fill added above original grade Ft. Gravel length Ft. Township Range Section Gravel width Ft. Total absorption area FtZ Beds: Number of Lines Number of trenches Distance between lines Ft. Dist. between trenches Ft. SEPARATION DISTANCES To Septic From Tank Absorption Lift StatioHolding Sewer Field n Tank Line Well *96' __ 25'+ TANK ® Septic ❑ S.T.E.P. ❑ Holding ❑ Other Manufacturer Capacity surface water 100'+ -- GREER 1500 Gal. Material Number of compartments Lot Line 10'+ __ NA HDPE 2 Foundation 10'+ __ LIFT STATION Manufacturer Capacity Remarks Existing 5BR (2 Houses). *Waiver to adjacent Gal. well — see attached letter. Alarm location Electrical installed by Installer JRS PIPE MATERIAL House to tank 3034 Tank to 3034 drainfield Drainfield CO/MT Inspector FWC BENCH MARK (Assumed elevation) 100 ft Inspection 5, dates: 1 7/15/22 2"d 7/15/22 Location and description p 3rd 4'h TOP OF MH RISER ON-SITE WATER AND WASTEWATER SECTION APPROVAL Conditional Approval: Date P�\\ .� AN1 r� -' • �'tQll� •• ••••• •••••••.••% % '• Curtis Huffman �����c�'�l ' • . 3/4/20231. . •'����"Awr/� CE 12899 pR l,iFO OFESSIONP,`'" \ OFE06�. Septic System -- Approved - Date �O 2 Z Note: this approval does not include well permit requirements. (Rev 05/02/18) PID: 051-052-28 PERMIT: OSP22625 vi GRACE STREET Lo N N90°00'00"E 113.47' !ECONNECTED TO EXISTING GRAVEL FIELD 0 ° D/W ao DCO G g DECK INSTALLED A—C=11.0'I MH 9978 CO DCO FINAL GRADE CO MT B —29.2' CO DFCO A— D=14.5'94.93 B—D=23.3' f A—E=15.9' 94.35 1.500 -GALLON 94.18 B—E=20.8' HDPE TANK EXISTWG FIELD A—F=18.6' B—F=17.9' A—G=24.5' SEPTIC SECTION SCALE: NTS B—G=13.7' T _ LAKE HILL ACRES #1 LOT 35 SUPPOR0 SERVICES:®®®® PREPARED FOR: ®�� OFA MALCOM RAY '01, �ee 22725 LAKE HILL DRIVE � wq ®* 9 TH i CHUGIAK, AK 99567 ® e FIRST WATER CONSULTING DATE:3/2/2023 d SURVEY: JLS rtis Huffman wx 13030 SUES WAY DRAWN: FWCS 3%2%2391®® ANCHORAGE, AK 99516 SCALE: 1" = 30' 907-350-9566 firstwaterAK@gmail.com PAGE: 1 OF 1 —10'— —...— 1.114%-? 100' WELL MH E HOUSE N RADII DFCO a A 54.0' C Ld FCO 0 0 / 0 RECONNECTED 29 2' TO MAIN HOUSE i� 26.0' O Lo SERVICE LINE °' p J 6.0' Y w Ln LOT 35 W o o co CD zw w co W Y O N N Q 6.0 O O W ,n 00 O) O O p GRAVEL N O O D/W O Z Z 26.0' 32.3' Y U PEI O INSTALLED A—C=11.0'I MH 9978 CO DCO FINAL GRADE CO MT B —29.2' CO DFCO A— D=14.5'94.93 B—D=23.3' f A—E=15.9' 94.35 1.500 -GALLON 94.18 B—E=20.8' HDPE TANK EXISTWG FIELD A—F=18.6' B—F=17.9' A—G=24.5' SEPTIC SECTION SCALE: NTS B—G=13.7' T _ LAKE HILL ACRES #1 LOT 35 SUPPOR0 SERVICES:®®®® PREPARED FOR: ®�� OFA MALCOM RAY '01, �ee 22725 LAKE HILL DRIVE � wq ®* 9 TH i CHUGIAK, AK 99567 ® e FIRST WATER CONSULTING DATE:3/2/2023 d SURVEY: JLS rtis Huffman wx 13030 SUES WAY DRAWN: FWCS 3%2%2391®® ANCHORAGE, AK 99516 SCALE: 1" = 30' 907-350-9566 firstwaterAK@gmail.com PAGE: 1 OF 1 0 o _ o MH I SEPTIC VENT O (typ) O O tf� > L a 3�: o __j o o W O Y O /-x--- .L f` X f x X —X_ 30' ! 30' ANCHORAGE RECORDING DISTRICT, ALASKA AS -BUILT OF: LAKE DILL ACRES 1st ADDITION LOT 35 PLAT 64-90 SURVEY CERTIFICATE: 1, John L. Schuller, Have conducted a physical survey of this property as shown on this drawing and that the improvements situated hereon are within the property lines and no enchroachments exist other than noted. Under no circumstance shoulc any information on this drawing be used for construction of fences, structures, improvements, or for establishing boundary lines. EXCLUSION NOTES: It is the owners responsibility to determine the existence of any easements, covenants, or restrictions which do not appear on the recorded subdivision plat. NOV 3, 2022 1 1 "=30 I schDllerftk.net 22-046-2R65 DRA�4 BY: CHBY MDNUUBM BOOK/PAGE JLS NW1561 220361 N GRACE STREET N UO = FND 518" REBAR �..� 0 F ALA�p ?: 49TH 4 . ......t. ........... cD J HN L. SCHULLER. o LS -10408 i �e � •• •' Jct ,%.fessiona\ Low w�,a 'I- s•p �P L li G^ C10� �n 1831 Talkeetna Street Anchorage, Alaska 99508 (907) 227-1455 office (907) 274-4992 fax Munidpalfty of Anchorage s '�_� epnl� rcmcot l P.O. Box 196650 ® 4700 Elmore Road Anchorage, Alaska 99519-6650 © (907) 343-7904 o Fax (907) 343-7997 —hftp://www.muni.-org/Onsite- Development - ----- Deve(®pment Services Division On -Site Water and Wastewater Program * * * * VARIANCE/WAIVER REVIEW * * * * Waiver#: OSV231032 Permit#: OSP221157 PID#: 051-052-28 P 0 cp--Ty Legal Description: Lake Hill Acres #1 Lot 35� T � �3 (L,'C, Engineer: Curtis Huffman, PE I/CC1,0 T- Z Your request for a waiver of the required 100' horizontal separation from the septic tank t6&ell has been approved. The approved separation distance is 96'. This waiver approval applies to the Existing septic tank 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 7 day notice regarding this waiver. ❑ Notarized .letter(s) of nonobjection have been received from the owner(s) of the affected adjacent property. 0 Adjacent properties are not affected by this waiver. ar�����■�r��e��vi����e�s�s��aaaa�esne�r������a�a�������a�r�����tr������o����e�t Waiver is Granted: X Waiver is not Granted: Date: 2 /-20--73 Approved by: _ L C— Name of eviewer e�ee��s���naa��ogarvaavo�eo���cr�earre�va�aaanea.■e....... Ftrs[ Wder CONSULTIN G ., . P , ... P N,. , 13030 Sues Way, Anchorage, AK 99516 907-350-9566 / FirstWaterAKagmail.com March 3, 2023 Municipalities of Anchorage On -Site Water & Wastewater Program 4700 Elmore Road Anchorage, AK 99507 RE: LAKE HILL ACRES #1 LOT 35 — ADJACENT WELL TO NEW SEPTIC TANK WAIVER Per the attached as -built survey by John L. Schuller (JLS) November 3, 2022, the closest edge of the newly installed HDPE septic tank was measured at approximately' 96.7' to the adjacent property's well on Benbecca Block 1, Lot 2A. JLS remeasured the locations of this encroachment and it was determined to be the same. It appears that the original staking setbacks at construction was not properly marked. This also was a challenging install to maintain elevations and the 10' separation from the existing foundation and to maintain other setbacks to existing wells and absorption systems and the tank was installed in the best place possible. We are therefore requesting a waiver to 96' between the referenced well on Lot 2A and from the new HDPE septic tank be granted at this time. Granting of this waiver is justified in the fact that the attached area CAN water samples show little nitrate influence if any — the wells on each side of this property show non detect or less than 0.5 mg/L, the newly installed HDPE tank is of higher material quality than the decommissioned old steel septic tank that has been in operation for around 45+ years with no known side effects and the improved tank is across the street with gutters / swales with existing grade length of over 100' separation and no visible manner surface flow could occur on any potential effluent tank overflow. Granting of this waiver will not adversely impact any of the neighboring properties. Please contact us if you have any questions. Respectfully, (�� Ll^^ - Curtis Huffman, P.E. Attachments: As -Built Survey MOA Septic Tank Inspection Report Copy of Area CAN Water Samples MOA Waiver Fee MUNICIPALITY OF ANCHORAGE On•3ite Vater & Wastewater Frngram PD box 195550 47M Emare Rid An&K"M ALMka 9E1G19-5590 Pburec- (907) 913,7904 Fix, (907) 343- h li p:fAWW . rn rjn i . org ro re5lle On -Site Wastewater Disposal System Permit Permit Number: OSP22i I 5 W*wk Type: SepticTank Upgrade TIX Code Number- 05105228000 Site Legal Address: LAKE HILL AC RES #1 LT 35 G:1561 Site Mailing Address Owner. RAY MAL[:OU01 22625 LAKE HJU DR. Chugiak Des iUn En jDirtt-er FIRST WATER CON ULTING This permit iz for the construction of, Effective -Date: Expiratlnn Date Lot Size in 5q Ft To tar Bed rnum!5; �i-Cnr 8 S Y f} ' u tbrar1mukt if2022 611 12023 16962 ❑ pispesai Field 0 Septic Tank ❑ Holding Tank ❑ Privy ❑ PFiV2112 WP11 n W910r Stproge Al I construction shall It in acoQrda nce with: 1, The att shed appraved design. 2. Al requirernenjs Specified in Ancttora�a Municipal soda Chapters 15.55 a0d 15-06 arrd Ehe Make of Alaska Wastevwdler Visposal Reguiatlorie (18AAC72) and Drinking Water Regulations (18AA080) :5. The vm!jt�%,rrater code 1uqui1ub rrr!�pwAlorus durtrrj JM0 lrkgTW1ffi1d1i. I he engineer shall noffy Rhe Deuelopmer3l SAMCi es Department par AMC 15.65. Provide notification by Calling (907) 313.7$04 (2417). 4- From Ocb bor 15 to April 15, a SUb*rrr1ace soil absorptlon System under constrxtion during freezing weather shall be either, a. Opened and Closod an the Borne day, or b- Covered, sealod, and heated to provent freezing Spepial Rmvisions: Thin '10ia ft well radius for the "]I I=Med 4n llenbecea SrC4 1 Lot 2A to the Mrthtwest shall t1m-- slak-ed prior to inslarlatinn of toe septic tank to ensure 100 It separation, Received By; Jssuad By, 6/112022 Dale:'-. ON-SITE SEPTIC/WELL PERMIT APPLICATION Parcel I.D. 051-052-28 Property owner(s) MALCOLM RAY Day phone Mailing address 22625 LAKE HILL DRIVE, CHUGIAK, AK 99567 Site address 22625 LAKE HILL DRIVE, CHUGIAK, AK 99567 Legal description (Sub'd., Block & Lot) LAKE HILL ACRES #1 LOT 35 Legal description (Township, Range & Section) Lot Size 16,962 Sq. Ft. Number of Bedrooms 5 APPLICATION IS FOR: APPLICATION IS AN: TYPE OF DWELLING: (N all that apply) Absorption Field ❑ Initial ❑ Single Family (SF) El -XI (w/wo ADU) Septic Tank I Upgrade Q (D) ❑ Holding Tank ❑ RenewalDuplex ❑ Multiple Dwellings ❑ Privy ❑ (SF and/or D) Private Well ❑ Water Storage ❑ THIS APPLICATION INCLUDES A WAIVER REQUEST FOR: Distance: I certify that the above information is correct. I further certify that this is in accordance with applicable Municipal Codes. gnature of property owner or authorized agent) Permit/Rush Fees: 4a � 5 Waiver Fees: Date of Payment: 512 6 a0,2c2_ _ Date of Payment: Receipt Number: Receipt Number: Permit No. 0 51°1-� Q I/ r.7 Waiver No. GADevelopment Services\Building Safety\On Site Water and Wastewater\Forms\Clie nt Forms\Permit Application.doc 13030 Sues Way, Anchorage, AK 99516 907-350-9566 / firstwaterAK@gmail.com May 24, 2022 Municipalities of Anchorage On-Site Water & Wastewater Program 4700 Elmore Road Anchorage, AK 99507 RE: SEPTIC TANK UPGRADE PERMIT LEGAL: LAKE HILL ACRES #1 LOT 35 The owner has requested that we obtain a septic permit to upgrade the existing aged steel septic tank on the above referenced lot. We propose to install a 1500-gallon HDPE tank per the attached design to serve the existing 5-bedroom residence. Per the owner there is a 4BR main house and the MOA approved a 1BR ADU with garage as shown on the attached asbuilt survey and design. Also, pet the owner Steve Pannone, PE tested the existing leach field recently and it passed a septic adequacy test. All well radii, property lines and foundation are to be staked by a RLS prior to construction. The lot and area are served by private wells. The design will not impact any of the neighboring properties. Please contact us if you have any questions. Sincerely, Curtis Huffman, P.E. Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP221157, Rebecca Carroll, 06/01/22 Municipality of Anchorage On-site Water and Wastewater REVIEWED FOR CODE COMPLIANCE OSP221157, Rebecca Carroll, 06/01/22 30' w ^1 J' Y GRACE STREET w 1 V N90°00'00"E 113.47 1r—x]'r� X GRAVEL • ui D /W '� X r- o6 r- • DECK 54.0' X_.__J EXISTING o N HOUSE N0 54.0' SEPTIC VENT 0 0 o (tYP) r 29.2' o 1 0 26.0' o 1 0 0i ' 0 Y 6.0' v X I > LOT 35 w o r a r- Z Ld w 6.0'ZD o O O o Lli "7j o Q w 0 GRAVEL 04 Q \e O D/W o Q z --� 26.0' 32.3' U �X x x x Uj Q x WELL x X 10' UTILITY ESMT . i----X----x x x x __ __/ 30' N 90.00 oa E 113.08 I I ANCHORAGE RECORDING DISTRICT, ALASKA AS -BUILT OF: LAKE HILL ACRES 1st ADDITION LOT 35 PLAT 64-90 SURVEY CERTIFICATE: I, John L. Schuller, Have conducted a physical survey of this property as shown on this drawing and that the improvements situated hereon are within the property lines and no enchroachments exist other than noted. Under no circumstance shoul4 any information on this drawing be used for construction of fences, structures, improvements, or for establishing boundary lines. EXCLUSION NOTES: It is the owners responsibility to determine the existence of any easements, covenants, or restrictions which do not appear on the recorded subdivision plat. WORK ORDER NUMBER: DATE- SCALE;E-MAIL MAY 21, 2022 1"=30' schulier®ak.net 22-046 DRAWN BY: CHECKED BY GRAD NUMBER: BOOK AGE: JLS N W1561 220202 * = FND 5/8" REBAR AW14416" O F � �� lP �4. AW 0 ' C�) 4 9 T H - .'A.`................. ... L..' ° n� ........ .. .......... @ J HN L. SCHULLER.� / `• , . , LS --10408 • ' ,�� / 1831 Talkeetna Street 4 �a • ' ; . y' a ;��'' Anchorage, Alaska 99508 (907) 227-1455 office ,`a ssio` ,,�•..• (907) 274--4992 fax o.DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION ENVIRONMENTAL ENGINEERING DIVISION 825 L Street- Anchorage, Alaska 99501 Telephone 264-4720 ON-SiTE SEWAGE DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT NAME ~,)(~ ~0 J~HON E LEGAL DESCRIPTION ~' DISTANCE TO: Well/o~/ * I Abs~i°Farea Dwelling ~<NZ Manufacturer ~ ~ Materia~6/~/L No. of compartments Liq. capacity, in gallons Inside length Width Liquid depth ~0~ IF HOME,DE: 0 Z ~ Manufacturer/~/~ Material Liquid capacity in gallons ~ Well Foundation Total length of lines ~ Trench ~.. No, of lines Length o~lip~ Distance between ~'' Top of tile to}finish grade'1~ /~J Matorialb~&Er ~ inches ' Total effe~s~ion area Length Depth PERMIT NO. ~ ~ Type of crib Crib diameter Crib depth Total effective absorption area m Well Building foundation Nearest lot line ~ DISTANCE TQ: ~ Class Depth Driller Distance to lot line PERMIT NO. m Building foundation Sewer line Septic tank Absorption area(s) ~ DISTANCE TO: OTHER REMARKS - APPROVE~ /~ DATE LEGAL A CK JLj II'll U IJ Al N Y hil BIOX97,IEAGLERIVEF,,AL-4"i�AT�iL T7 Z -*-vrll OF 'AILL Q Vj? STrVrIC L 1- OF IW A I EIR F T, WN FT. U -S, PER 111t. K V) . FCASING IiINABER IN '0 �Y 0R T l0_„, F 0 N, NI ATI 0, N - F1.41111qt _ r. F, From From rd. do-- Ft - 1 -4. AO T T ------ Ft- Yt to-_ F Ft, t. loFl, Fri an 'Ft. f.t-t. Ft. t �rFL yt- 6 F ft I to Fl. to Ili 40 nn, Fa_ to to 7 From Ft. to Ff Fl� to - From. FE. to I- t Firon) -Ft. tv Fil, F 0 N, NI ATI 0, N - F1.41111qt _ r. 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Tt'-il:!!; S'./'.:i:;'T'l:ii;!'"! ! ~..!, I:::IC:C(])i:;~:DI:::!I',!C!!!; i.,.I ;.'; 'T'H THE] }i:; :[ I...!I",I[)IE!:;i:::~;'T'FI!',ID "!"HI::IT 'T'H!:~!; ~)N'"'-S];'I"Ii:~; :!i!;.Et.,.ll~i:;i: S'./?:;TIEH i"!t'::i") l:;i:l.'!~I~;!l_l);~i:~ E:]",!!...I::!!:;i;(3EH!ii;?'4'T' I!:::' Tl"il~i; i:;;:F!;:iii;.1;l;)i:ii;!',!C:E ~;'.:]; F::.E:I-'IC!I)!ii[LI~;D "i'O :[i'-,!(3t._I...I[:,I!Z !'"l(;)Ri:!i: TH!:::Ii",! !!:5 t!~:EZ:,I:;~'.OCff'i::~;. , 2204 Pe~for~ed "Fo~ Robert Zwicker teoal ~escriotion: Lot 35 Block _ This Form Reoorts Soils Ar, chorage, Ale ~ 99503' Date Performed~26-78 Subd~¥i~ion Lake Hill Acres Yes Percolation Test Denth Feet 10 - 12 14 . 16 18 20 - Soil Characteristics Brown Silty Sandy Gravel Bottom of-Test H61e Was Ground 1~ Yes, At Water Encountered? :No ~/ what Depth? Readinq Date . Percolation Frnposed De~th of Cn~PE~TS:_ Gross Time 150 ~q. Ft. Net Time Depth to H20 l~et Dron Rate !linute iostal~ation: Seenaoe Pit Drain Field Inlet Depth To Bottom Of Pit Or Trench Data Certified Date: 8-26-78 Test Performed By__ David Paul MUNICIPALITY OF ANCHORAGE 0 Development Services Department p p Phone: 907-343-7904 On -Site Water & Wastewater Section Fax: 907-343-7997 Certificate of On -Site Systems Approval Parcel I.D. 051-052-28 Legal description LAKE HILL ACRES #1 LT 35 Site address 22625 LAKE HILL DR Expiration Date: Current property owner(s) EAGLE ROCK CORPORATION INC X The On-site system(s) is/are approved for 5 bedrooms Conditional approval for Comments or advisories: 11/16/23 bedrooms, with the following stipulations: By:. Original Certificate Date: 8/16/23 This Certificate of On -Site Systems Approval (COSA) is intended to demonstrate the subject system(s) islare in substantial compliance with municipal code. The Municipality of Anchorage, Development Services 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 work. ATTACHMENTS: COSA Checklist Absorption Field Advisory Tank Age Advisory Other X Well Flow Advisory Nitrate Advisory Arsenic Advisory COSA Approval—June 2022 MUHU ,, UT Y OF AHCHORA OE artment Development Services Dep p 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. 051-052-28 Complete legal description Lake Hill Acres #1, Lot 35 Location (site address) 22625 Lake Hill Drive, Chugiak Current property owner(s) Eagle Rock Corporation, Inc. 2. ON-SITE SYSTEMS SIZED FOR 5 BEDROOMS Day phone 907-231-3227 3. TYPE OF WATER SUPPLY: ❑ Private Well 0 Private Well serving 2 dwelling units ❑ Private Well serving 3+ dwelling units ❑ Community Well or Public ❑ Water Storage 4. TYPE OF WASTEWATER DISPOSAL: ❑ Private Septic ❑® Private Septic serving 2 dwelling units ❑ Holding Tank ❑ Community Septic or Public Sewer 5. SEPTIC TANK: ❑ Steel 0 Plastic ❑ Concrete ❑ Fiberglass Age 1 - See advisory if steel older than 20 years 6. ABSORPTION FIELD: ❑ AWWTS ❑ Bed ❑i Deep Trench ❑ Wide Trench ❑ Seepage Pit Field distance to property line, field distance to foundation, field under driveway. o' Waiver request for: Distance: Expedited review requested: ❑ By applying for this entitlement, this property is subject to inspection by municipal On-site staff to verify the accuracy of the information provided. COSA Fee $ 5-60 Date of Payment 71�1z�2 COSA # OSC 2,31266 Waiver Fee $ 2.25 Date of Payment Waiver # 05 x(23 i o37 COSA Application—June 2022 COSA Checklist Legal Description: Lake Hill Acres #1, Lot 35 Parcel ID: 051-052-28 If more than 1 well and/or septic system on lot, provide separate checklist. Structure served by this system 2 A. WELL DATA ❑E Well log is filed with Onsite (or attached) Date drilled 9/25/1978 Total depth 253 ft Cased to 253 ft ❑■ Sanitary seal is functioning correctly 0 Wires are properly protected Casing height (above ground) 21 in. Date of flow test for COSA 7/12/2023 Static water level at beginning of test 180 ft. Comments No water storage tank. B. TANK DATA Measured operating fluid level in septic tank 5.5' Date of pumping 7/25/2023 ❑ Required maintenance completed, if AWWTS Comments: Not a AWWTS D. ABSORPTION FIELD DATA Which system tested (date installed) 10/13/78 ❑Q ALL standpipes present per record drawing Total measured depth from grade 10.4 ft (max) Measured depth to pipe invert from grade 5.1 ft (min) ❑ N/A — pressurized field. ❑ Per record drawings, field is insulated. EW 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 Well production at time of test +10 gpm Water storage tank volume 0 gallons Well disinfected for coliform test? ❑ Yes 0 No ❑ Coliform bacteria is Negative Nitrate mg/L ❑■ Nitrate less than MRL (ND) Arsenic ug/L❑ Arsenic less than MRL (ND) Collected by Robert Colles, PE Date 7/12/2023 C. LIFT STATION ❑ Required maintenance completed Age of lift station years Lift station material Comments: N/A, no lift station Adequacy test date 7/12/2023 Results 0 Pass Fluid depth prior to test _ Water added 758 gal New fluid depth 60 it Elapsed time 240 min 42 in Final fluid depth 38 in Absorption rate 750 gpd FIELD STATUS — POST RECOVERY Effective depth (per record drawings) 60 in Effective depth used 38 in Effective depth remaining 22 in Comments/Deficiencies: No pre-soak required. No rejuvenation within past 12 months. COSA Checklist June 2022 �\ pleat S' Municipality of Anchorage _ Department P.O. Box 196650 ® 4700 Elmore Road Anchorage, Alaska 99519-6650 6 (907) 343-7904 ® Fax (907) 343-7997 http://www.muni.org/Onsite Development Services Division On -Site Water and Wastewater Program * * * * VARIANCE/WAIVER REVIEW * * * * Waiver#: OSV231037 COSA#:OSC231266 Permit#: PID#: 051-052-28 Legal Description: LAKE HILL ACRES #1 LT 35 Engineer: AK Construction & Design Your request for a waiver of the required 10 feet horizontal separation from the absorption field to the property line has been approved. The approved separation distance is 7.0 feet. In addition, the absorption field is under the driveway and foundation. See the engineers waiver justification letter. 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. ............................................... ■ ............................. ■ 1 Waiver is Granted: X Waiver is not Granted: Date: '3//6/23 Approved by: Name of RevoCer ......................... ■ .............................■ ■ .................. ■ 1 **** VARIAN C E/WAIVER REVIEW **** AK Built Construction & Design, LLC General Contracting – Engineering – Project Administration PO Box 771203, Eagle River, AK 99577 – Phone: (907) 854-9115 Page 1 of 2 August 15, 2023 Municipality of Anchorage Onsite Water & Wastewater Program 4700 Elmore Rd Anchorage, AK 99507 RE: COSA Inspection Waiver Requests for Lake Hill Acres #1, Lot 35 Onsite Water & Wastewater Reviewer, AK Built Construction & Design, LLC has been employed to perform a COSA inspection for the subject property. During the inspection process it was determined the existing soil absorption system does not meet specified separation distances for field to building foundations and field to property line. It is also noted that the field is located under a driveway and under a building foundation. Requirement Standard Actual Absorption Field to Building Foundations ≥10’ 0’ Absorption Field to Property Lines ≥10’ 7’ Absorption Field Located Under Driveway No Yes The absorption field inspected was installed in 1978 prior to the construction of the garage on the subject parcel. The garage foundation is located over the absorption field. Note that only a portion of the absorption field is under the building foundation; the absorption field was not installed in a straight line but rather angles towards the building foundation, parallels under the building foundation, and then angles away from the building foundation. It is unknown if the construction of the garage required the field locating of the absorption field. AK Built is requesting a waiver of absorption field located under the building foundation be granted. The garage shows no signs of impacts influenced by the absorption field. The garage structure is a slab-on-grade construction. Based on historical performance of the structure and slab-on-grade construction there is no anticipated adverse impact to the existing building foundation. There is no crawl space in which effluent from the field could present a health impact on a building occupant. Inspection of the structure’s interior shows no signs of building failure due to the location of the absorption field. Furthermore, the absorption field is under the foundation where the structural load is bridged via the garage door header to the side jambs of the opening. The absorption field under the foundation is located approximately in the middle of the garage door opening. Photo 1: Field Locate Adjacent to Foundation Photo 2: Field Locate Looking East ZAK, UILT s CONSTRUCTION . DESIGN AK Built Construction & Design, LLC PO Box 771203, Eagle River, AK 99577 (907)854-9115 Project No.: 0014.01 Client: Malcom Ray Legal: Lake Hill Acres #1, Lot 35 Parcel ID: 051-052-28 Address: 22625 Lake Hill Dirve, Chugiak Absorption Field Pipe Crush Analysis Calculated By: RLC Date: 7/19/2023 Checked By: RLC Date: 7/19/2023 Notes: 1) Per record drawings of 1978 system install, absorbtion field pipe conforms to ASTM D3034. 2) Pipe adequacy evaluated based on deflection control, maximum 7.5% deflection recommended per ASTM D3034, section X1.1. 3) Pipe stiffness assumed to be 46 psi, per minimum performance requirements deifned by ASTM D3034, Table 3. 4) Unit weight of soil above pipe assumed to be 120 pcf. 5) Live load assumes full ton pickup truck applying a ground pressure of 70 psi. 6) Deflection analysis performed using Modifed Iowa Formula, (Masada, 2000) 7) E' value based on Hartley, 1987, as found in Journal of Transporation Engineering, 1987, 113(5): 538-553 Modified Iowa Formula Ax 100DLKP o AX d 0.149(PS) + 0.061E' d (%) = 3.96, < 7.5 here, Ax = horizontal diameter change d = diameter of undeformed pipe 4 in DL = time lag factor 1.2 Typ range is 1.0-1.5 K = bedding constant 0.1100 Table 1 from Masada, 2000 P = vertical pressure on pipe; W/2r 18.54 Ib/in PS = pipe stiffness 46 psi Min. required by ASTM D3034 E'= modulus of soil reaction 900 psi Table 3 from Hartley, 1987 W = vertical load on pipe 74.17 psi Soil load (DL) plus vehicle load (LL) r = pipe radius 2 in Unite weight of soil 120 pcf Soil depth 5 ft Soil load on pipe (unit weight * depth) 4.17 psi Vehicle load on pipe 70 psi '4a �a