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HomeMy WebLinkAboutMOON #2 S12554Onsite File July 6 2020 Municipalities of Anchorage Departments of Health and Human Services P.O. Box 196650 Anchorage, Alaska 99519-6650 Fax 249-7847 Re: Proposed Moon #2 Subdivision Legal: T12N R3W SEC 33 LT 38 (Moon Subd. #2 Lot 38A & 38B (S-12554) To Whom it may concern: The letter is to answer the questions concerning the proposed new on-site septic and well design for the above referenced lots. Proposed Lot 38B has an existing well and septic system, see MOA permit OSP 191160. Proposed Lot 38A has a perc test and water monitoring through the seasonal spring 2020 high water period. Attached to this letter is site plan, C1, showing all of the surrounding wells with their flow rates and depths. The wells typically are all shallow less than 160 feet, and flow over 5 gallons per minute (GPM). On the new proposed Moon #2 lot 38B the well is 142 feet deep with a flow rate of 10 GPM. 1. For proposed lot 38A the lot size is 1.05 acres and the soils consisted of silty gravels and sands (GM/SM) for the entire 9 foot test hole depth. The seasonal high ground water was measured at 5.2 feet below grade. The existing soils and well flow rates are excellent and will support an on-site septic and well system with no impact to the surrounding properties. Please call me with any questions or comments concerning this new proposed subdivision. Sincerely, Michael N. Anderson, P.E. 4661 Natrona Ave. Anchorage, Alaska 99516 Phone 727-8864 Fax 345-1391 Attachments: Soils log and Cl site plan T12N R3W SEC 33 LT 26 Well depth >120'@ 5gpm NO NITR6jE.LEVELAVAILABLE / 1 I I jEXISTING WELL i I \ J---- <� / — — — — — — — — — — I1 0 T12N R30 SEC 33 LT 39B DESIGNED: MNA L Well depll 120'@ 10gpm EXISyWGISERTII_C Lr)a% N O) n O C L"QZ I I` ` \ \ I Z QQ� Zw �\ 1 l I� SEPTIC ) ° �Zo !} Q 0�1 -,CK MAS BEEN FlLLEf \ -------. T12N R3W SEC 33 LT 58B / Well depth 118'@ 12gpm / I / NITRATE LEVEL 0.293 I / N c+) 1 I / I I I It e EXISTING WELL J \ C6 I Q 00U) I \ I\ < O ('0 O a UO —nilllll�r— SITE PLAN SCALE: 1"=50'X2 (11x17) T12N R3W SEC 33 LT 27 NO WELL LOG \ \ VACANTLOT \ 1 \ 1 II `r` — — — — J)FIbSEMOON #2 I I p LO 1 38A I I SIZE 11052 ACRES / - / / - I I / / i _ 1 TLFST HUgE 1 11 SEQIGR SEPJ6ppFA o I IL--l� I )SED MOON ; LOT 38B ..'• .' aEXI: T{2N,R3W,Sec33,LOT34W •: Wa� epth 142'@ 10gpm NITRATE LEVEL 10.1 , / LOT LINE / \\ EXISTING WELL ) T121J R3W ,Sec33,LOT 59 ( WELL�EPTH 129', 8 GPM NO NITRAA LEVELAVAILABLE I \ 1 � I KEY NOTES tO LOT 388 HAS A NEW SEPTIC SYSTEM INSTALLED SEE MOA PERMIT p OSP 191160 2O THE WELL ON LOT 38B WAS INSTALLED, DEPTH IS 142'W/ 10 GPM. WATER MONITORING WAS CONDUCTED THROUGH THE SEASONAL OHIGH WATER PERIOD (SPRING OF 2020) T12N R3W SEC 33 LT 28 Well depth 51'@ 7gpm NITRATE LEVEL 4.58 — =LL i ® EXIS ING WELL II �I I 1 / i \ / l 1 SEPTIC L) 1 / T12N R3W SEC 33 LT 37A Well depth 102'@ 2gpm / / \ / \ I SEPTIC / 1 1 EXISTING WELL T12N R3W SEC 33 LT 60 / Well depth 118'@ 12gpm / \\ NITRATE LEVEL < 0.1 % .� OF :{+f 49 rx /.» «..., ��c�•y lJichvel N, Anderson: Wi 11 j,. CE -9469 +� W �I DATE: 7/5/2020 I\ DESIGNED: MNA O 'D 't EXISyWGISERTII_C Lr)a% N O) n O C L"QZ CHECKED: MNA Q Q Ln x Z QQ� Zw '— o U co crs Q 0 1, =Zo U U PR E1100SSLOPEAREA12 ° �Zo !} Q 0�1 -,CK MAS BEEN FlLLEf \ z / ORIGMAL PERMIT / I Ls) < 00 / N c+) / LOT LINE / \\ EXISTING WELL ) T121J R3W ,Sec33,LOT 59 ( WELL�EPTH 129', 8 GPM NO NITRAA LEVELAVAILABLE I \ 1 � I KEY NOTES tO LOT 388 HAS A NEW SEPTIC SYSTEM INSTALLED SEE MOA PERMIT p OSP 191160 2O THE WELL ON LOT 38B WAS INSTALLED, DEPTH IS 142'W/ 10 GPM. WATER MONITORING WAS CONDUCTED THROUGH THE SEASONAL OHIGH WATER PERIOD (SPRING OF 2020) T12N R3W SEC 33 LT 28 Well depth 51'@ 7gpm NITRATE LEVEL 4.58 — =LL i ® EXIS ING WELL II �I I 1 / i \ / l 1 SEPTIC L) 1 / T12N R3W SEC 33 LT 37A Well depth 102'@ 2gpm / / \ / \ I SEPTIC / 1 1 EXISTING WELL T12N R3W SEC 33 LT 60 / Well depth 118'@ 12gpm / \\ NITRATE LEVEL < 0.1 % .� OF :{+f 49 rx /.» «..., ��c�•y lJichvel N, Anderson: Wi 11 j,. CE -9469 +� W DATE: 7/5/2020 � M C DESIGNED: MNA O 'D 't Lr)a% N O) n O C L"QZ CHECKED: MNA Q Q Ln x Z QQ� Zw '— o U co crs Q 0 1, =Zo U U o R �Zo !} Q 0�1 m 00 M IT 06 Ls) < 00 N c+) � 0 J C6 Q 00U) * < O ('0 O a UO m z u0 <t Q 3:Q w ai —1 ch U) 0 o 6 U cy) CL of O T m O W W Z0_ U o U CL Ui F- 0- Q O Q DRAWING TITLE: SITE PLAN MR DATE: 7/5/2020 DESIGNED: MNA DRAWN: DJR CHECKED: MNA SHEET MR OF At Municipality of Anchorage ,� .` . GINEE 's SE Development Services Department ''°' h.•• •'.� On -Site Water and 41+astewater Section ; 4 9 T t-1 •. �� 4700 Elmore St. ••••°•0••••• •t P.O. Box 196650 Anchorage. AK 99519-6650 "r WWW.muni.org/onsite , .. ./ (907) 343-7906 MICHAEL N. ANDERSON •:� /W ••, CE -9469 .•,: ,� Soils Log - Percolation Test l� ©P��fEssl�Xa` Performed For;C^C.�'u�yiTy� j�/f p0 V1 Date Performed: z/ z Lega! Description: 7" / 2 /� 2 uo �i 7 L 3 3 Township, Range, Section,: 1- 2- 3- 4- 5- 6- 7- 8- 9- 10- 11- 12- 13- 14- 15- 16- 17- 18- 19- 20 - Lai 3� 0"' C'j . �—o 0 ,JAS GROUND WATER Date ENCOUNTERED? Net Time ,t Net Drop IF YES, AT WHAT DEPTH? c Depth to Water Atter o Monitoring? r� p F Date: S iv zp Site Plan Reading Date Gross Time Net Time Depth to Water Net Drop moi( P11 70 /0",1 t it S 7-1 Reading Date Gross Time Net Time Depth to Water Net Drop moi( P11 70 /0",1 it S 7-1 ."�.�,.� � ...1 111 c Zr— (minutesiinch) FERC HOLE MAMIETER („p �7 TEST RUN BETWEEN j, FT AND_FT COMMENTS /'�. � � �t -cP �i.. ' {. I t �t l'` �y� PERFORMED BY; 1\ I CERTIFY THAT THIS PEST VIAS PERFORMED IN ACCORDANCE bVITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: (p -Zo