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HomeMy WebLinkAboutSAND LAKE #2 BLK 2 LT 22Sandlake #2 Block 2 Lot 22 #011-133-03 Municipality of Anchorage Page 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/or Well Inspection Report Permit Number: 4- u•/ u7 O J_ > PID Number: '*2// /'z 3 0 '� Name 6eoraa dna 4r/l lreai�l+er Wastewater System: C' New O y Upgrade Address: / 4n 4ernwv ABSORPTION FIELD Phone: No. of Bedrooms: GrOeep Trench O Shallow Trench D Bed O Mound O Other LEGAL DESCRIPTION sod Rating.^ Total Depth from original grade: • h GPD/Sq Ft 17.5 Lotn block: Subdivision: 22 Depth to pipe bottom from criginal grade: Gravel depth beneath pipe Ft F1 Township: Range: Section: Fill added above original grade: Gravel length; r n Ft. ,{ /� 'r '/ Ft. WELL 21 New 0Upgrade Gravel width: Number of lines: DtJnpa.tsn ries Ft. CULWllcstlon (Prints. A.S.C): Total Depth: Cased To: Total absorption area: Pipe material; ! 40S Ft. •%%= Ft. 794 sD Ft PYC Driller. Al Date Drilled: �%-�/7 Stavc Wates Levet. ��(% installer. Data stalled: ne Ft. SO/T/� 7 /Oi qii Yield:Pump '� Set at CapngHeghtAOMGround: TANK GPM Ft, 2 Ft. SEPARATION DISTANCES O'septic 0Holding 0S.T.EP. To Septic Absorption Lfh Hw -nq PutwWPmarts Manufacturer. Capacity in gallons: From Tank Flek Station Tank Sewer Lints -r ry / /i Cl /faQ I / I /� k / Qv 0 Wall, JJS' /2-7 _ _ Material: f Number of 7 panmenta: tP� Surface Water — _ — _ -' LIFT STATION NanP Lot Line 37 16 — — Size In gallons: — Manufacturer. — Foundation 2 5 3 — — _ 'Pump on' keel at: Rump ofr lwaI at High water-alarm at: Curtain Pump Make d Model Electrical Inspections perfomwdby: Drain — — — I Remarks: BENCH MARK Location and Description: '/ / OUPY P.7nlP /, W / res e r 'qt" Lof 22 Assumed Elevation: /OV,O EN SEAL 8A�9 Inspections performed by: S. 25ellAf"k Dates: lst15 /s 4R """e" ii�e--•«-««-.`y�VV1 M� �t `WTHER !R 2nd 6 10 02 C l Ae,.� O. SCOTT CROWTHER f'�% Department of Health and Human Services approvalsr� cs CE-6491 Reviewed and approved by: &e-7— Date: / 04 111\a\Os�at'�~p Hata RW.a )MOAa O Water Well Swing Tie distances (feet) Point I A 1 B scot 52.5 59.7 scot 69.2 57.1 mt3 57.1 56.2 co4 37.6 35.6 c05 36.6 34.9 tco6 34.9 32.9 tco7 29.3 27.2 fco8 16.3 7.7 PID 011 13303 Wilcox Street House I i q fca8 g I 1000 gallon ° tco7 tank G tco6 cos Altemate Skotic Trench I scot , (Septic Trench 49 feet tong by 8 feet Deep -----_j Lot line 0 20 40 SCALE IN FEET Permit Number. SW 97 0208 scot Crowther Associates Septic As—Built Plate Geotechnical Engineering Services Sand Lake Subdivision No.2, Block 2, Lot 22 Anchorage, Alaska Job No. 001.021 nle No. 001027p223 Date July 1998 Clean Out Monitoring Tube Clean Out o iF w M M I 1 IIII mm Foundation .'.'.'.' ' 8 e. ,o Clean Out r 8 e NS' q g. u t0 d . . . . 'I 'II I V � • I io y r, � .... III III I cc Clean Out 7X n p_ Clean Out ' ' ' ' ' m n I I 8 � a .•. IIII Clean Out Clean Out I I to V 'III A � N 1�0 :�•V- ��j� 4 V d Clean Out Monitoring Tube Clean Out e r Municipality of Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG — PERCOLATION TEST PERFORMED FOR:_ 6t--rA P �`?Al^,9 �^�l C/O�<%r/� or DATE r I LEGAL DESCRIPTION:-artOOLgKP Z /: 41 7 - Township, Range, Section: DEPTH L SLOPE (FEET) LO/ zZ fTt•T� r- 2 I I Gray Si /t (/rJL) 3- 4- 5- 6- 7- a567 MI- 8- 9- 10- 11 - 691011 12- 13- 14- is- 16- 17- 18- 19- 204— COMMENTS 21314151617181920 — COMMENTS Sor„P Sahel ler/S�g %, V C /h$ 7uA-i 80H WAS GROUND WATER ENCOUNTERED? NO IF YES, AT WHAT DEPTH? —� Wo toring? u liter o 7 aIE, 6 /o 9� SITE 0, SCOTT CROWTHER �. CE -6491 PERCOLATION RATE (mmutevmch) PERC HOLE DIAMETER TEST RUN BETWEEN FT AND FT PERFORMEDBY: /; "'rl7U irni.i-104oi^ I J_%l.�'i�a�u, w� CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALLSTATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE % q g 72-008 (Rev. 4165) M 04 < cpr MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND HUMAN SERVICES P.O. BOX 196650, 825 ^L" STREET, ROOM 502 ANCHORAGE, ALASKA 99519-6650 ON-SITE WASTEWATER DISPOSAL SYSTEM PERMIT PERMIT NUMBER:SW970208 DESIGN ENGINEER:G. SCOTT CROWTHER, P.E. OWNER NAME:CROWTHER GEORGE S OWNER ADDRESS:BOX 1605 PALMER, ALASKA 99645 PARCEL ID:01113303 LEGAL DESCRIPTION: SAND LAKE #2 BLK 2 LT 22 LOT SIZE: 6750 (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: PAGE 1 OF 1 DATE ISSUED: 7/24/97 EXPIRATION DATE: 7/24/98 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: E GINEER SHALL PERFORM AN ADDITIONAL SOILS TEST ATTTHE TIME "'OF CONSTRUCTION TO A MINIMUM DEPTH OF 6 FEET BELOW THE ,;BOTTOM OF THE ABSORPTION FIELD. RECEIVED BY: DATE: 7 Z S 92 ISSUED BY: Zell a DATE: -2.5--2z •� Municipality of Anchorage A Department of Health and Human Services Rick Mystrom, 825 "L" Street Mayor P.O. Box 196650 Anchorage, Alaska 99519-6650 July 29, 1997 G. Scott Crowther, P.E. Box 1605 Palmer, Alaska 99645 Subject: Waiver Request for Lot 22 Block 2 Sand Lake #2 Waiver Request #WR970034, PID #011-133-03, SW970208 Dear Mr. Crowther: Your request for a waiver of the required 10 foot separation between an on-site wastewater disposal system and a lot line has been approved. The waived distance is 0 feet from the south and north property lines to the leachfield. 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, y, �. �� Daniel J. Roth On-site Services ljw #7 Crowther .• n n MUNICIPALITY OF ANCHORAGE Department of Health and Human Services On-site Services Section Waiver Review Worksheet WR# WR970034 PID# 011-133-03 HA# Permit # Date Received: June 30. 1997 Legal Description: Lot 22 BLock 2 Sand Lake #2 Engineer: G. Scott Crowther, P.E. Box 1605, Palmer, Alaska 99645 Applicant: Ceorge S. Crowther **eOtt seri%� �.� �inYh � LY Waiver Requested: Lot line waiver offeet to 3? lpirrAsnes. Criteria: 1. Geology: Points: A. Water Table B. Soil Sorption C. Permeability D. Water Table Gradient E. Horizontal Separation TOTAL: 2. Special Conditions: 3. Other: Waiver is Granted: X Waiver is NOT Granted: List Conditions or Reasons for above: SEf t,�G/,vEE.P1 A7/19[s/�O tE7�� OF 7"Q'IFM42740.v Date: 7-:29-97 By: VIM-' Name of Reviewer Rec #: 02776/0336 Amount: $ 115.00 Date Paid: June 30. 1997 001.017 July 25, 1997 Municipality of Anchorage Department of Health and Human Services Environmental Services Division 825 L Street, Suite 502 Anchorage, Alaska Attention: Mr. Dan Roth Permit Application On -Site Wastewater Disposal Systems Sand Lake Subdivision #2 Lot 22, Block 2 Anchorage, Alaska This letter presents Mr. John Colliandees of Colliander Construction request for a permit to construct on site deep dminfield wastewater disposal system on Lot 22 of Sand Lake Subdivision Number 2, Block 2. Colliander Construction plans to construct a three-bedroom house on the lot during 1997 or 1998. The lot is south west of the intersection of Wilcox Street and 80th Avenue in Anchorage, Alaska as shown on Plate 1. Both Wilcox Street and 80th Avenue are 2 -lane unpaved streets. The lots in Sand Lake Subdivi- sion #2 are 50 feet wide by 135 feet deep. Sand Lake Subdivision #2 is about 90 percent developed with two and three bedroom houses. Each house has an on-site septic system consisting of a deep drainfield. The houses are serviced by class C community wells for their water supply. The location of septic systems and wells on adjacent lots are presented on the Vicinity Map Plate 1. For each existing well in the subdivision the Alaska Department of Environment Conservation (ADEC) has waved its required separation distance to the nearest septic system from 150 to 100 fat CR01VTNPR ASSOCIATES SITE CONDITIONS The subject lot is covered by spruce and alder tress. As shown on the Site Plan, Plate 2 the ground surface gent- ly slopes downward towards the southeast between Elevations 96 and 90 feet (Elevations are based on the assumption that the ground at the northwest comer of the site is at Elevation 100 feet). Table 1 presents a description of the deep soil profile and its geologic origin at the subject lot. The informa- tion presented in Table l is based both on adjacent wa- ter well logs and septic system test pit logs. Table 1. Deep Soil Profile and Geologic Origin Depth Interval (feet below surface) Soil Description and (Geologic Origin) to 2 silt (residual) to 15 fine grained sand and silt (alluvial) 15 to 100 sandy silt (glacial till) 100 to 260 gravely clayey silt (glacial lacustrine) 60 to 390 gravely clay (glacial drift) 390 to 410 Sandy Gravel (alluvial) Most existing wells in Sand Lake Subdivision #2 have a 6 -inch casing. They have been drilled to about a 400 foot depth where they encountered an alluvial sandy gravel. The gravel contains an aquifer that has an abundant water supply. The aquifers' static water level, which has been measured in the wells, ranges between 110 and 120 fat below the surface. Pump tests per- formed at 20 and 35 gallons per minute respectively have drawn down the water level 3 and 6 fat in the wells. Laboratory tests performed on samples of water from existing subdivision wells have historically not de- tected either coliform bacteria or nitrate. Page 1 P. O. Box 110854 /Anchorage, Alaska 99511-0854 Telephone (907) 349-1198 /Teleeopy (907) 512-3885 001.017 On April 21, 1997 a class C well permit and a waver to reduce the required separation distance between the proposed well and septic systems from 150 to 100 feet was applied for at the ADEC for the subject property. As part of the application a water sample was obtained from the well on the adjacent lot (Lot 21 of Block 2). Laboratory test results indicate that both Nitrate -N and Total Coliform concentrations in the well water are at non detectable levels. Laboratory test summaries are presented on the attached sheets. Based on the above data the ADEC has approved a re- quest to install a class C well at the location presented on Plate 2. They have also waved the required separa- tion distance between septic systems and the well from 150 to 100 fat The location for a water line that will connect the house to the well is shown on Plate 2. INVESTIGATION Subsurface conditions were explored at the lot by exca- vating a backhoe test pit at the location shown on Plate 2. The test pit was excavated to a 12 foot depth. Our engineer was on site to log the soil and groundwater conditions encountered A log of the test pit is presented on the attached MOA Soils Log - Percolation Test form. The soil has been classified in accordance to the unified soil classification system. A percolation test was performed at the test pit in a I- to 8 -inch diameter bole, hand dug 12- to 18 -inches deep. The hole was presoaked with water, which seeped into the soil. The percolation tests was perfor- med immediately atter the presoak. The rate that water seeped into the soil was monitored and recorded Per- colation test results are presented on the attached MOA Soil Log - Percolation Test form. CROWTIM ASSOCIATES SEPTIC SYSTEMS Lot 22 Test Pit 3 was excavated at Lot 22. Subsurface condi- tions encountered consist of 9.5 feet of sandy silt over sand to the 12 foot depth explored Groundwater was not encountered in the test pit A percolation test was performed in the sandy silt at a 6 foot depth below the surface. Based on percolation test results we conclude that a deep trench septic system on Lot 22 should be designed for a percolation rate of 17 minutes per inch and an application rate of 0.6 gallons per day/square foot (gpd/sf). For that application rate we conclude a deep trench septic system for a three bed- room house should have a 7.5 foot effective depth and be 50 fat long. Calculations for the septic system depth and length are attached The recommended loca- tion for both primary and replacement systems are pres- ented on Plate 2. Recommended details for a dminfield are presented on Plate 7. This septic system location is outside of the 100 foot ra- dius for both the existing and proposed wells. This location does not encroach on the required separation distances of existing septic systems and wells. It will not impact the performance of existing or future septic systems and wells. Septic Tanks A 1,000 gallon septic tank will be installed on each lot Locations for the septic tanks are presented on Plate 2. Sptic Pinin¢ Septic piping connecting the house to the drainfield will be installed with cleanouts as shown on Plate 7. They will be 4 -inches in diameter and sloped to drain at 1 to 2 percent Installation Requirements Both the deep drainfields and the septic tanks will be installed in accordance to the "Typical Dap Trench Re- quirements and Specifications" presented in the An- chorage Municipal Code section 15.65. Page 2 P. O. Box 110854 /Anchorage, Alaska 99511-0854 Telephone (907) 349-11981 Telecopy (907) 512-3885 001.027 Installation Exploration and Monitorine The following exploration and monitoring will be per- formed during construction: • A test pit will be excavated to a 14.3 foot depth to check the soil type and for groundwater. • A PVC pipe will be installed in the test pit as a ground water monitoring tube. Ground water moni- toring will be performed for 7 days after the PVC pipe is installed. WAVER REQUEST The MOA requires that drainfields be setback 10 feet from property lines. To install a dap trench drainfield on the lot it will need to be inside of the require! 10 foot setback of both the north and south property line. So we request that the north and south property line 10 foot setback requirement be waved for the drain5eld. We trust this provides the information that you require. Please call if you have any questions. Your very truly, G. Scott Crowther, P.E. Civil Engineer 6491 Attachments: Plate 1 Vicinity Map Plate 2 Site Plan Soils Log - Percolation Test Dap Trench Calculation Sheet Plate 3 Deep Trench Details ADEC Letter of June 11, 1997 CMUHERASSOMTES G. SCOTT CROWTHER �Q CE - 6491 / z� ; III�F9F `•••.........•-''i�;� II��� p80FES5tONa�� Page 3 P. O. Box 1108S4 /Anchorage, Alaska 99SH-0834 Telephone (907) 349-2198 /Telecopy (907) 512-3885 West 80th Avenue 1 L ETIP 2 I P 3 If 4 6 7 9 10 11 12 West 82nd Avenue F—i Existing Septic System Trench 0 100 200 FPI Proposed Septic System Trench Existing Well SCALE IN FEET P Proposed Well Crowther Associates Vicinity Map Plate Geotechnical Engineering Services Sand Lake Subdivision 12, Block 2 Mchoroge, Alaska Job No. 001.027I Fie No. 001027PB Date June 1997 Edge of West 80th Avenue 100' Right of Way Line 100' 98' Lot Line 96' TP-1 A Q 100' Radius for Lot 24 94' N Proposed Well ; LU Lot Line Y M % . 92' g o ' O 1 O W 2 0, C ' Z' I A ^ Lot 23 OF Aap' Lot Lin'} \k%y �P A h /�j Nip —3 I _ 0 Q J Drivew '/ 1 A G. I Orr CRO ER CE-6491 CD A / r � 90• Illll � ROF� E SjpN=���.r Lot 22 100' Radius of Existinq Well Lot Line --- Waterline Piping �• Septic Piping 1000 galllon 0 30 60 Septic Tank Auxiliary Septic droinfield SCALE IN FEET Test Pit Location droinfield 3 feet wide 1P-1 and Number A location and a 7.5 foot Note: Contours ore based on the assumption effective depth that the ground at the north west comer of the Proposed Well site is at elevation 100 feet. Crowther Associates Site Plan Plate Geotechnical Engineering Services Sand Lake Subdivision +2, Block 2, Lot 22 Anchorage, Alaska Job No. 001.027 File No. 001027P3 Date June 1997 4� 1 %a n �� m T �° T W O W �] Pr Pr M +6� � Fi N � � � Er Pr N O m o is' o_ D a. V Z A 0 m V =• � O m•.�. •. Foundation .' Clean Out s • • • Ill o1111 � IIII I I 8 Qg Clean Out IF. C Ln 1111 6 �• "• O Clean Out III I Ii1 Fgw � .�. •. •. IIII I I Clean Out o o Clean Out $ I I v S v as 3 v N R III I H 1 O � fD E Clean Out Monitoring Tube Clean Out e Municipality of Anchorage DEPARTMENT OF HEALTH 8 HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG — PERCOLATION TEST PERFORMED FOR: _Coen c sri/•r LO.,ltN s>iiOh DATE LEGAL DESCRIPTION: S'ogW Lal(e Sudoivif/ov o'2 Township. Range, Section: SLOPE (FEET) 2- 34 3- 4 5 1 ) 6 7 I 8 ! 6eco*+rs c✓¢f 9 10 t ./O 6'rdy Sarycl (SP) WASGR IVO ENCOU , mtrlwm (iPrtfC� S 11 r+0/Stl {vqe /o IF YES. AT WHAT OL 12 Coo/co Groin P4 DEPTH? E G 13 DW Is Water After NA 1q1 wut 14 15 16 17 18 19 20 COMMENTS PERCOLATION RATE 17 (minutes/inch) PERC HOLE DIAMETER TEST RUN BETWEEN G FT AND 7 FT PERFORMED BY:I -f ` 3 T7 CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALLSTATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE DATE U 23 197 12-008 (Rev. 4185) 11,111 .�SSS�3 :goo �awa�t AQRg� min =77777 _% Sonrl /wlce Svbo%visioi. >yZ . Lof 2 Z cK z peep Treoc4 Zeoc4 .Fie/d 21•. so opt/cr,>tioOT, .^afe-. o F' 0. 6��od�fC2 3� free. _besrporn _^so ¢SD _9pc% � desya .rad 4)-- 45o.9pd/ � '�-- �. 750 ft: Z6 Feef � G� _trer,cti ../myth �:_ :_}-_� _s _ _. ... � - � • --• - --- -6''43 FAL '_��0 - - . --_ ! "" t. 'r,9 frevlcl r. • T �- _-r--._� ,-. :-;-_--� _-«.«.-may Al 177 •7,,. Q S= CRON�MER C f* } CE -6191 1 17 , - 1.� 1 1 -.- DEPT. OF ENVIRONMENTAL CONSERVATION APIC-s:ORAG=- v ---=ERN _7 J=L1C SEE RVI OFF—ICE 555 Cordova Anchorage, Alaska 99501 Crowther Associates P.O. Box 110854 Anchorage, Alaska 99511-0854 TONYKNOWLES, GOVERNOR 269-7519 (fax) 269-7506 11 June 1997 Re:Sandlake Subdivision #2, Block 2, Lots 22,23 & 24 Dear Mr. Crowther: ADEC # 9721 -DW -111-111; 9721 -WV -111-045 Your plan submittal for an on -lot disposal system with waver on the above listed lots have been reviewed. Please proceed as you have proposed. Attached you will find approval to construct documents for the class "C" drinking water well and the on -lot disposal systems for your wastewater needs. Inspection and sign -off of as -built plans shall be performed by a professional engineer registered in the State of Alaska. Arrangements for this work are the responsibility of the developer. The "Certificate to Operate" for the water system will be issued when the Department has approved the applicant's as -built plans. If construction or operation have not begun within two years after issuance of the plan approval, the approval is void, and plans must be resubmitted to the Department for review and approval. Respectfully, William R. Rieth Environmental Engineer 001.027 April 21, 1997 Alaska Department of Environmental Conservation 555 Cordova Street Anchorage, Alaska 99501-2617 Attention: Mr. Mike Lu Well Permit Application Sand Lake Subdivision #2 Block 2, Lots 22, 23, and 24 Anchorage, Alaska This letter presents Mr. John Colliander of Colliander Construction request for a class C well permit and a waver to reduce the required separation distance be. tween the proposed well and septic systems. Colliander Construction plans to construct three bedroom houses on lots 22, 23 and 24 during 1997 or 1998. The three lots are south west of the intersection of Wil- cox Stmt and 80th Avenue in Anchorage, Alaska as Shown on Plate 1. Both Wilcox Street and 80th Avenue are 2 -lane unpaved streets. The lots in Sand Lake Sub- division #2 are 50 feet wide by 135 feet dap. Sand Lake Subdivision N2 is about 90 percent developed with two and three bedroom houses. Each house has an on- site septic system consisting of a deep absorption trench. The houses are serviced by class C community wells for their water supply. For each existing well in the subdivision the Alaska Department of Environment Conservation (ADEC) has waved its required se. paration distance to the nearest septic system from 150 to 100 fat. SITE CONDITIONS The three subject lots are covered by a dense growth of spruce and alder trees. The ground surface gently slopes downward towards the southeast between Eleva- tions 160 and 150 feet Locations of existing wells and septic systems within the vicinity of the subject lots are presented on Plate 1. Table 1 presents a description of the soil profile and its geologic origin at the subject lots. The information Presented in Table 1 is based both on adjacent water well logs and septic system test pit logs. CROIiTHER ASSOCIATES Table 1. Soil Profile and Geologic Origin Depth Interval (feet below surface) Soil Description and (Geologic Origin) to 2 silt (residual) 2 to 11 fine grained sand (eolian) with some runoff seepage at I 1 feet 11 to 100 sandy silt (glacial till) 100 to 260 gravely clayey silt (glacial lacustrine) 260 to 390 gravely clay (glacial drift) 390 to 410 Sandy Gravel (alluvial) Most existing wells in Sandlake Subdivision ill have a 6 -inch casing. They have been drilled to about a 400 foot depth where they encountered an alluvial sandy gravel. The gravel contains an aquifer that has an abundant water supply. The aquifers, static water level, which has been measured in the wells, ranges between 110 and 120 feet below the surface. Pump tests per- formed at 20 and 35 gallons per minute respectively have drawn down the water level 3 and 6 feet in the wells. Laboratory tests performed on samples of water from existing subdivision wells have historically not de- tected either coliform bacteria or nitrate. PROPOSED WELL The proposed locations for a new well and three septic system trenches on lots 22, 23 and 24 are shown on Plate 1. The proposed well will have the following fea- tures, which are similar to other wells in the subdivision. • The well will have a 6 -inch casing and be drilled to about a 400 foot depth. • A well -screen will be installed on the lower 20 feet of the well. • A bentonite sanitary seal will be placed around the well casing between the ground surface and a 20 foot depth. • The well casing will extend 12 inches above the ground surface. • The ground surface within 10 fat of the well will be graded so that it slopes downward. Page 1 P. O. Box 110834 /Anchorage, Alaska 99511-0854 Telephone (907) 349-2198 /Telecopy (907) 522-3885 001.017 CROIMIER AZOCIATES • The well will be designed for a 24 gallon per minute (gpm) discharge. • A 3 horsepower pump will be set at a 160 foot depth with in the well casing. • A 1.25 -inch diameter galvanized pipe will connect the pump to the surface. • A pitless adapter will be attached to the galvanized Pipe at a 10 foot depth below the surface. • One inch, type K copper pipes will be connected to the pitiess adapter and service the houses. The ADEC requires that a class C well be separated at least 150 feet from all existing and proposed on site septic systems. As shown on Plate 1 one existing and the three proposed septic systems are within a 150 foot radius of the proposed well. So we request that a waver be given to reduce the required separation distance from 150 to 100 feet for the proposed well. This request con- forms to previous wavers granted for other class C well permits in the subdivision. We trust this provides the information that you require. Please call if you have any questions. Yours very truly G. Scott Crowther, P.E. Civil Engineer 6491 Attachment: Plate 1 Site Plan Page 2 P. O. Box 110854 /Anchorage, Alaska 99511-0854 Telephone (907) 349-2198 /Telecopy (907) 522-3885 1 II West 80th Avenue 100 well foot 150 foot well radius radius 3 P P 24 20 6 g 7 18 17 9 i6 10 15 11 14 12 13 s N 8 West 82nd Avenue F-1 Existing Septic System Trench 0 100 200 F P I Proposed Septic System Trench SCALE IN FEET # Existing Well P Proposed Well Crowther Associates Geotechnical Engineering Services:1 Site Plan Sand Lake Subdivision 1i2, Block 2 Anchorage, Alaska Plate Job No. 001.027 File No. 001027P1 Date March 1997 1 II P 2 IP 23 3 P 4 20 6 g 7 18 17 9 i6 10 15 11 14 12 13 Al L ME Environmental Services Inc. CTSE Ref.# Client Name Project Name/# Client Sample ID Matrix Ordered By PWSID Parameter Nitrate -N Total Coliform 972587001 Crowther Associates Lot 21 Bk 2 Sandlake SID #2 Lot 21 Bk 2 Sandlake SID #2 Drinking Water Client PO# Printed Date/Time 05/29/97 11:19 Collected Date/Time 05/27/97 15:00 Received Date/Time 05/27/97 15:30 Technical Director: Stephen C. Ede Released Allowable Prep Analysis Results POL Units Method Limits Date Date Init 0.100 U 0.100 "A SM18 4500-NO3F 10 max 05/27/97 GCP 0 c0l/100mL SM18 92228 05/27/97 RAM MUNICIPALITY IPALITY OF ANCHORAGE fes',:. Development Services Department Phone: 907-343-7904 On -Site Water & Wastewater Section Fax: 907-343-7997 Certificate of On -Site Systems Approval Parcel I.D. 01-1-133-03- 1. GENERAL INFORMATION Expration_Date: Complete legal description Sand Lake#2 Block 2 Lot 22 Location (site address) 8030 Wilcox Current property owner(s) Mike McCabe Mailing address Real estate agent 2. TYPE OF DWELLING: El Single Family (w/wo ADU) ❑ Duplex ❑ Multiple Dwellings (Single Family and/or Duplex) 3. NUMBER OF BEDROOMS: 3 Day phone Day phone 4. TYPE OF WATER SUPPLY: TYPE OF WASTEWATER DISPOSAL: Private Well ❑ Private Septic 0 Water Storage ❑ Holding Tank ❑ Community Well 0 Community ❑ Public Water System ❑ Public Sewer ❑ Waiver request for: Distance: Received by: Date: COSA to be released to the engineer, unless otherwise requested by the engineer. COSA Fee $ 575-b Date of Payment to %.3l l9l Receipt Number OgLt'�-}p COSA# 05C I g1Q?6 Waiver Fee $ Date of Payment Receipt Number 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 C&M ENGINEERING Phone 8545558 Address 20182 TULWAR Engineer's Printed Name CHARLES BALZARINI Date 9/18/2019 o� :�C,q�� co 49 *� 6. DSD SIGNATURE - / W .. ... T System #1 Approved for bedrooms % ' ' ' ' ' ' ' ' ' ' ' ' ' CHARLES G BALZARINI System #2 Approved for bedrooms ��F���..• CE -13854 Disapproved �lliF�PROFESSIONP� �r Conditional approval for bedrooms, with the following stipulations: p�LIrV.'''��, o Vyq M m 1 %9 SA 0 � q Original Certificate Date:��^� 1 1 The Municipality of Anchorage 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 civil 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 Septic System Advisory Well Flow Advisory COSA Checklist blue sheet Nitrate Advisory Arsenic Advisory �J Other C 6tA i 4 � Legal Description: SAND LAKE #2 BLOCK 2 LOT 22 If more than 1 septic system on lot: COSA Checklist # 1 of 1 Parcel ID: 011-133-03 Structure served by this system 1 A. WELL DATA ❑ Well log is filed with Onsite (or attached) Well production at time of test " gpm --- - -Date drilled- 9/19/97 -- Water storage -tank -volume - -gallons -- Total depth '402 ft Well disinfected for coliform test? F-1 Yes ❑ No Cased to 402 ft ❑ Coliform bacteria is Negative ❑ Sanitary seal is functioning correctly Nitrate ND mg/L ❑ Nitrate less than MRL (ND) ❑ Wires are properly protected Arsenic 55.4 ug/L ❑ Arsenic less than MRL (ND) Casing height (above ground) +18 in. Collected by C&M ENGINEERING Date of flow test for COSA 91919 Date of Sample 9/17/19 Static water level at beginning of test ft. Comments well is a private community well, previously a class c water supply 218621 B. TANK DATA C. LIFT STATION Age of tank(s) 21 years ❑ Required maintenance completed Tank type/material STEEL Age of lift station years ❑ Standpipes/foundation cleanout per record drawing Lift station material Date of pumping 9/10/19 Comments: tank level normal, 50" D. ABSORPTION FIELD DATA DEEP TRENCH Which system tested (date installed) 1998 ❑ ALL standpipes present per record drawing Total measured depth from grade 12 ft (max) Measured depth to pipe invert from grade 4 ft (min) ❑ N/A — pressurized field ❑ Monitor tubes go to bottom of drainfield. If not, state depth into effective Al Code -required soil cover over field ❑ System presoaked (Required if vacant for greater than 30 days prior to date of test) Gallons introduced gallons Comments/Deficiencies: COSA Checklist yellow sheet Adequacy test date 9/919 Results P Pass For 3 bedrooms Fluid depth prior to test 24 in Water added 450 gal New depth 32 in Elapsed time 1440 min Final fluid depth 24 in Absorption rate 450 gpd Any rejuvenation treatment (past 12 months) If yes, enter date N/A Im E. SEPARATION DISTANCES From Private Well on Lot to: (Please enter distances if less than required or if community well) F41 Yes if No ft Septic Tank/Lift Station on Lot > 100' 0 Yes if No, comment Property Line > 10' Community Sewer Manhole/Cleanout > 100' ft Q Yes if No ft ® Yes QYes if No ft Neighboring Tank > 100' QYes if No ft Private Sewer/Septic Line > 25' ®Yes if No ft Absorption Field on Lot > 100' QYes if No ft Holding Tank > 100' ®Yes if No ft Neighboring Absorption fields > 100' Animal Containment > 50'4Q Yes if No ft Q Yes if No ft Manure/Animal Excreta Storage > 100' Community Sewer Main > 75' F4-1 Yes if No ft F4-1 Yes if No ft From"Septic/Holding Tank on Lot to: (Please enter distances if less than required) Building Foundations > 10' ® Yes if No ft Surface Water > 100' 0 Yes if No ft Property Line > 5' QYes if No ft Driveway/Parking > 0' ® Yes if No, comment Absorption Field > 5' F4-1 Yes if No ft Wells on Adjacent Lots: Water Main > 10' ® Yes if No ft Private Wells > 100' ®Yes if No ft Water Service Line > 10' ® Yes if No ft Community Wells > 200' ® Yes if No ft From Absorption Field on Lot to: (Please enter distances if less than required) Building Foundation > 10' F41 Yes if No ft Driveway/Parking > 0' 0 Yes if No, comment Property Line > 10' F-1 Yes if No 0.5 ft Wells on Adjacent Lots: Water Main > 10' ® Yes if No ft Private Wells > 100' ® Yes if No ft Water Service Line > 10' ® Yes if No ft Community Wells > 200' ®Yes if No ft Surface Water > 100' F41 Yes if No ft F. ENGINEER'S COMMENTS Septic cleanouts repaired / extended to meet code requirements. G. ENGINEER'S CERTIFICATION I certify that l 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. 10/10/19 COSA Checklist yellow sheet ..W �F AAw Cgsl>t ®sem ,•• TH •;y�$r o ,49 —..� .z . • �� CCHARLES G BALZARINI O CE -13854 �1�FloPRaFESS10NQ� Septic 'Tank Advisory Certificate of On -Site Systems Approval #OSC191480 Subdivision: Sand Lake #2 Block 2 Lot 22 Starting at 20 years of age the MOA issues Advisory's for steel septic tanks. The septic tank for this property is 21 years old. Typical replacement costs range from $8,000 to $11,000. This advisory must be attached to all copies of the subject Certificate of On -Site Systems Approval. This is an example of what the metal of a 20 year old steel tank MAY look like. ��lrn��ties�P0�8o 665Ec'or2i askI 9�*���x� Arsenic Advisory - - CertificateofOn-Site-Systems Approval #-OSC191480 - Subdivision: Sand Lake #2 ,Block 2, Lot 22 A water sample revealed an arsenic concentration of 55.4 micrograms per liter (ug/L). The Environmental Protection Agency (EPA) has established a maximum contaminant level (MCL) of 10.0 ug/L for public drinking water systems. While private wells are not subject to this regulation, EPA standards are based on existing health information and can therefore be used to gauge the relative quality of water from private wells. information on arsenic is available from the On -Site Water and Wastewater Program website (www.muni.org/onsite) or at 343-7904. This advisory must be attached to all copies of the subject Certificate of On -Site Systems Approval. C"rc a"."`3�'� s�e"`;`.r^"sr.,",?..:.�r ``�w'� �.,r'"C'-`� ����� ��ila�lingAdc�ressO�k�ox�fi9665'O�Ancito�gAlaska:�9�1� 6650 * wwinr rr�unMo g�� MUNICIPALITY OF ANCHORAGE ' DEPARTMENT OF HEALTH d HUMAN SERVICES MW Division of Environmental Services On -Site Services Section P.O. Box 196650 Anchorage, Alaska 99519-6650 343-4744 CERTIFICATE OF HEALTH AUTHORITY APPROVAL FOR A SINGLE FAMILY DWELLING( Parcel I.D. # _4,2/1 / 3 3 03 HAA M r / 1. GENERAL INFORMATION Complete legal description S Lot 2-2 1 Location (site address or directions) 9703 G✓,/cox• Property owner __ OW'i,1 Ce/, ., / N Day phone —24P3 39/Z! Mailing address a92c V P-tSz5Vac;?_T ,D P_ 74e, Lending agency Mailing address. Agent Address Unless otherwise requested, HAA will be held for pickup. 2. NUMBER OF BEDROOMS: 3 3. TYPE OF WATER SUPPLY: Individual well Community well x Public water Day phone Day phone NOTE: If community well system, provide written confirmation from State ADEC attest- ing to the legality and status of system. 4. TYPE OF WASTEWATER DISPOSAL: Individual on-site X Holding tank Community on-site Public sewer NOTE: If community wastewater system, provide written confirmation from State ADEC attesting to the legality and status of system. 72-025 JR. 1911 Front MOA .71 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 of this Health Authority Approval application shows that the on-site water supply and/or wastewater disposal system is safe, functional and adequate for the number of bedrooms and type of structure indicated herein. I furtherverify 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 in compliance with all Municipal and State codes, ordinances, and regulations in effect on the date of this inspection. Name of Firm A55oCo ele5 Phone 349�Z1 �a� Address Engineer's signature 6. DHHS. SIGNATURE Approved for L, eLE bedrooms. Disapproved. Conditional approval for Additional Comments L-0 • Date &4-C-4 21�, KOTT.CBC'hTHE3��ii` `c CE.6491 bedrooms, with the following stipulations: Date The Municipality of Anchorage Department of Health and Human Services (DHHS) Issues Health Authority Approval Certificates based only upon the representations given in paragraph 5 above by an independent professional engineer registered in the State of Alaska. The DHHS does this as a courtesy to purchasers of homes and their lending institutions in order to satisfy certain federal and state requirements. Employees of DHHS do not conduct inspections or analyze data before a certificate is issued. The Municipality of Anchorage is not responsible for errors or omissions in the professional engineer's work. 72.=(Aw 1/911 8i k MOA -21 Municipality of Anchorage DEC c':' 1999 DEPARTMENT OF HEALTH & HUMAN SER uY ur AN-HURAGE Environmental Services Division t'�'^Ot .'ENTAL SrRV!`-`S CPASC 825 L Street, Room 502 • Anchorage, Alaska 99501 • (907) 343-4744 Health Authority Approval Checklist Legal Description: S4edbke Sala, N/ArA2 Zg,0 22 Parcel I.D.: O// 133OW A. WELL DATA Well type 6 if A, 6, or C, attach ADEC letter. ADEC water system number Z/8621 Log present (Y/N) 1/ls Date completed CI / 9 C/ 7 Total depth 4 0 Z Cased to ¢ti Z Casing height (above ground) Z Sanitary seal (YM) YPS Wires properly protected (Y/N) Ye 6, FROM WELL LOG Date of test 4 9 er9 Static water level / /D 41r►f Well production 24 00" g.p.m. WATER SAMPLE RESULTS: AT INSPECTION Coliform we Nitrate / y Other bacteria Date of sample: // 2 9 /C19 a Collected by: 6 Sc a, # Cro �%i Pv B. SEPTIC/HOLDING TANK DATA g.p.m. Date installed S /S #A Tank size ! 00op Number of Compartments Z Cleanouts (Y/N) Ye e Foundation cleanout (YM) Ydf ' Depression (Y/N)1/I'Q_ High water alarm (Y/N) /[140 Date of Pumping //*-A.i Pumper C. ABSORPTION FIELD DATA Date installed _ S /7 rl$ Soil rating (g.p.d./W or ft2/bdnn) O. 6 System type Trek a /. Length 4R Width 2 / Gravel thickness below pipe _a ' Total depth I Z r Effective absorption area Monitoring Tube present (Y/N)_Yef_ Depression over field (Y/N) __Zy4p. Date of adequacy test Results (Pass/Fail) For bedrooms Fluid depth in absorption field before test (in.); Immediately after_ gal. water added (in.): _ Fluid depth (ins) Minutes later: Absorption rate = a.p.d. Peroxide treatment (past 12 months) (YM) If yes, give date 72-026 (Rev. 3/96)' D. UFT STATION /Y/# /'r Date installed Manhole/Access (Y/N) High water alarm level at' _ Cycles tested E. SEPARATION_ DISTANCES Size in gallons 'Pump on" level at' 'Datum </s// u +e L.14 24' "Pump off level at' !t,DEC waled se va.rs+�n W&Aw ser to SEPARATION DISTANCES FROM WELL ON LOT TO: moo ,te.A. Septic/holding tank on lot //S 11 On adjacent lots /ri0 AVA of&x Absorption field on lot / Z 7 / On adjacent lots /W Xref- rAaeml Public sewer main Sewer /septic service line Public sewer manhole/cleanout Lift station �- SEPARATION DISTANCES FROM SEPTIC/HOLDING TANK ON LOT TO: Foundation 2 r Property line Z S Absorption field Z 3 /!�G' f Water main/service line — Surface water/drainage l� f Wells on adjacent lots SEPARATION DISTANCE FROM ABSORPTION FIELD ON LOT TO: Property line D. S Building foundation SD Water main/service line Surface water -- /Od /ekl Driveway, parking/vehide storage area Illi Curtain drain Wells on adjacent lots F. ENGINEER'S CERTIFICATION I cantly that I have determined thru field inspections and review of Municipal in conformance with MOA HAA guidelines in effect on this date. /� Signature At Amite, (rCptrJ� Engineer's Name G Sc mf& . 6iaL,,,Mek- Date PQC -2 [ HAA Fee $ ��p Waiver Fee $ Date of Payment -IoZ a I A% 9 Receipt Number ©JV 1,7 72.026 (Rev. 3/96)' Date of Payment Receipt Number O. 8C4rr CROWTMR .. CE - 6491 EE,