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Home My WebLink AboutROCKHILL BLK 2 LT 18Rockhill Block 2 Lot 18 #015-362-30 MUNICIPALITY OF ANCHORAGE Development Services Department Phone: 907-343-7904 On-Site Water & Wastewater Section Fax: 907-343-7997 Pump Installation Log Well Drilling Permit Number: _______________ Date of Issue: ____-____-____ Parcel Identification Number: ____-____-____ Legal Description Block Lot Property Owner Name & Address: Pump Installation Date: _____-_____-_____ Pump Intake Depth Below Top of Well Casing: __________ feet Pump Manufacturer’s Name: ___________________________ Pump Model: _____________________________________ Pump Size: ____________hp Pitless Adapter Burial Depth: _________ feet Pitless Adapter Manufacturer’s Name: _________________________ Pitless Adapter Installer: ____________________________ Well Disinfected Upon Completion? XX Yes No Method of Disinfection: _____________________________ Comments: Pump Installer Name: __________________________________ Company: ___________________________________________ Mailing Address: ______________________________________ City: ___________________ State: __________Zip: _________ Attention: The pump installer shall provide a pump installation log to On-site within 30 days of pump installation. Municipality of Anchorage Department of Health and Human Services : Division of Environmental Services On-Site Services Section 825 'L' Street Room 502 AK 995t 9-6650 Page of P.O. Box 1~3650 Anchorage. www.cl.anchorage,ak.u$ (907) 343-4744 ON-SITE WASTEWATER DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT Permit Number. ~-~000 ~ ~ PID Number. N'"',.~O~,,.t ;' /...4.0.~ Pb~P~ WastewaterSyetem: I~New r-lUpgrade ~='"~.g30 ~. 85't2/9~'. '4~'~'.~.-%T0'7 ABSORPTION FIELD LEGAL DESCRIPTION O* P~ Well: ~ New I'-I Upgrade c,,.v~ ~ ~'~ FI, J ~ SEPARATION DISTANCES ~ Septic r'] Holding I-I $.T.E.P. [-I Other:, Tank Field Station Tank Sewe~ L~e //~/~C/-~/3~ ~.O'- S<./.c~W~.L~Um 7SO~t.~¢t '~"~'}3; "-~_ ~ ~ s~. c~ ,,..u.~,.,.MFT STATION ..~ ~Tcr~.-.~ I~.S;'v%~..uO pc,,r~_. BENCH MARK Engin. eeffa Stamp. t ~,'n~,.,. o.., ~..,-,_ .4s-~.,,,-7 ¢ (.~---,-,,,-.+T...J D~*~'~r',5 .~.~'../e,I /~".~'.~& ,?,7'~ / }/~.~. Inspections performed by: To(~ne,J ~"P--,,e.~,.4-,/3 Dates: 1"~ '~'//~ 2" .5--.//'.7 t'.---~. Department of Health and Human Services approval Reviewed and approved by: .~~, ~"/ Date: I".~.,q-.'Ol Technical Field Services PO Box 215 llealy, Alaska 99743 SOILS LOG - PERCOLATION TEST Legal Description/Owner: Lot 18, Block 2, Rockhill Subdivision/Susie and Larry Phelps Performed By: Tobben Spurkland, PE Date Performed: 5117100 Depth Test llole #: ,fixed Gravel and Clay 3 *See site map for hole location Depth to Groundwate Date Dry 511710~ Dry 511810C 6 14-Feb Silty sand [)ale Reading Clock Time Net Time Water LevelNet Drop 17-May-0{~ Presoak 10:30 18 3:00 Add water and start 3:30 9 4:10 0:40 5 5/8 3 3/~ Set #2 4:10 5 5/8 4:40 0:30 2 1/4 3 ;et #3 4:40 6 5:10 0:3C 2 I/2 3 I/2 Set#4 5:10 6 5:40' 0:30 2 7/8 3 1/8 Percolation Rate: 9 (mln/in) 13 Hole Dim 6 in ~"~;'"~",~ -, ~, ,'~'Q3"'?.-. ......... ..'7 ~'~ Top of hole: ~c,t n .~7- ~,~,,,~'"'x ~.,,.''''ex , ,e~.7 '-.'T' '"'":"- %" ~ ' '" ~4 nase of hole: o.~ ,, ,.,Z;.~:...,-,,X j. ~, I ~X~' '":,.'~"' 15 )ca gravel ~ ..,,,,..A~gT.,,; ................... BOll at 15 ¥, ''~ % O..n'~l Cb}r ss Graham Comments: Pete test was performed on the more confining silty sand layer rather than~JPffa.yer ~Vadlibl~ .%-.. ,', with a faster pete rate for conservative design purposes. '-'. :,,.,,¢-"--..."- : ... ..'" ". ~' '.., Performed by Tobben Spurkland: I, Dan Graham, on behalf ofT. Spurkland, certify that this test was performe in accordance with all State and Municipal guidelines in effect on the date the test was performed. MUNICIPALITY OF ANCHORAGE Department of Health & Human Services On-Site Sewer/Well Permit Application ~:~)-~' SINGLE FAMILY DWELLING NOT~: A~.k~ on mu~t be I~lled out ¢~np~et~y Property Owner Name Mailing Address_ ~930 L=. E-o'~-~ ~)~cr' ~ Legal Description Day Phone · Zip Code _ LotSizeS~_ot.I Acres~) Number of Bedrooms '~ Inspections ~11 be conduced by: ~ Approved Engln~fing Fi~ ~ Municipali~ (pe~it fee included) D~s your house ~n~in any of ~e following: ~ HotTub ~ S~mming p~l ~ ~empy p~l ~ Jacu~i, ~ Water ~ffener Unit ~ls appli~fion Is fo~ ~ Sewer On~ ~Sewer and Well ~ Sewer Upgrade ~~. I ~er ceffi~ ~at I ~~', ~=~' ' ~ In a~o~ance ~ appli~ble Municip~ ~es. [:]Well Only []Water Storage pmpert'/Ovmer/Well D~ = Receipt il__ = Receipt I __ - Pem~it II Waiver Technical Field Services Daniel C. Graham, PE PO Box 215 llealy, Alaska 99743 (907) 683-2480 Municipality of Anchorage Department of Health and iluman Services Environmental Services Division On-Site Services PO Box 196650 Anchorage, Alaska 99519-6650 January 1,2001 RE: Request for Certificate to Operate Water and Wastewater System Lot 18, Block 2 Rockhill Subdivision Enclosed is information for your review for the above supply water and wastewater disposal system. The following information includes: · On-Site Wastewater Disposal System and Well Inspection Report · Copy ofwell log (you should have received this from the well driller) · As-built survey conducted by R.L. Button, Registered Land Surveyor · Certified As-built cross section from notes by T. Spurkland, PE · Required fee ($300) In addition to the plan survey, I hereby submit the following swing-tie table for your records. Mr. Button located the monitor tubes, well and clean-out pipes via standard survey methods, llowever, I have included these for your records. They match up with the submitted drawing. To/From A B C D I 16 33.5 2 22 38 3 83 94 4 19.5 19.5 Well 46 51 I apologize for the long delay in this submital. Please feel free to contact me at 683-9719 or Tobben Spurkland, supervising engineer at 279-3916 if you have any questions. Respect full,Submitted, Daniel C. Graham, PE Municipality of Anch_o.rage Department of Health and Human ~erv~ces 825 'L' Stm~ . '. · ' .... · p;o.'Box i~r~ Anchorage,,~aska ~:~ .. ~M~....,~. ........ . Pemit Number:. #$W000064 .l)aleof~,e'- 4- ~ 7-00 .par~ Idea tiflcaflo . Nmn be ~' 0 f 5'3 0 ~-3 0 Data Started: ~ Dale Compltqed: ~.1.00 Is well located at approved permlt location? [] ,Yes [] ~No Property Owner Name & Addre~: Suzio & Larry Phelps 3930 E 80~ Ave. Borehole D~rta: Soil T~pe, Thldmesa & W~ S~rata stick-up organic & ~ Gravelly silt sil~y gra vel gravelly stTt ' gravelly silt ? wet ' water send & gravel Depth (fl) ' Fram - To · 0 2 2 12 12 15 15 35 35 44 44 57 57 60 Method ofDrilling]~ a~r rot.,'u'y Casing type: stud Wall Tl~kness: ~025 inches · Diameter: _~ inches Depth: 6._~0 feet I~iner Type: D~ameter: incl~s Depth: Casing stiekup above ground: ~. feet ~] cabl~ tool Static water level (from ground level): 44 Pumping level:'60 feet after ~ hours pt~,n,'mg 20+ gpm Recovery Rate: 20+_ ~ Method of Testing:. airl~ · Well Intake Opening Type: · [] ~ End [] Open Hol~ [] Scr~'~ed Start , f~ [] perforatk~s. Start ~ Stopped feet Grout Type: ~¢ntonite #8 VolUme." · Depth: Stun_0 feet Stopped ± fro' Pump: Intake Depth feet Pump size . hp Brand Name Well Disinfected Upon CompletiOn? [] yes [] NO Method of Disinfection:. C/or/ne Tablets · Comments: Well Driller:. Alpine DrilFmg &'Enterprises ' PO Box.If0496 · Anchorage AK 995f I Attention: Thc w~l driller sEa~ p,-o-dde a v.~ll log to the property owner within 30 days ofcompletion and the property Municipality of Anchor. age Department of He 2a t. Lh. sa tHuman serv,ces P.O. Box 196650 Anchorage, Alaska 99519-6650 PJ'Ck Mystrom htr p:l/www.cl.a nchorage.a k.us Mayor Permit Number: #SW000064 Dateoflssue: 4-17-00 .parcel Identification aNamber: 015-362-30 Date Completed: 6-I-00. Is well located at approved permit location? [] Yes [] No Date Starte~.: ~ Legal Descr~pt~o~t Property Owner Name & Address: Suzie & Larry Phelps 3930 E 80~ Ave. Ioreholc Data: Depth (ft) Sell Type, Thickness & Wat~ Strata From · To stick-up 0 2 organic & silt 2 12 Gravelly silt 12 15 silty gravel 15 35 gravelly silt 35 44 gravelly silt - wet 44 57 water sand & gravel 57 60 Rockhi# BIk 2 It 18 RECEIVED dUN 06 2000 Munlclpality of Anchorage Dept. Health & Human Services Method of Drilling [] air rotary 'r'l cable tool Casing type: stoel Wall Thickness: .025 inches Diameter: 6 inches Depth: 60 feet Liner Type: Diameter: inches Depth: Casing stlckup above ground: _2 feet feet Static water level (from ground level): 44 feet Pumping level: 60.feet aRer _2 hours pumping 20+- gpm Recovery Rate: 20+. gpm Method of Testlng: airlift Well Intake Opening Type: [] Open End [] Open Hole [] Screened Start feet Stopped [] Perforations Start , feet Stopped Grout Type: Bentonite # 8 Volume: I bff Depth: Start _0. feet Stopped _+ feet Pump: Intake Depth feet Pump size hp Brand Name Well Disinfected Upon Completion'?. [] Yes [] No Method of Disinfection: Cledne Tablets Comments: Well Driller: Alpine Drilling & Enterprises P 0 Box .110496 Anchorage AK 99511 Attention: The well driller sha~ provide a well log to the property owner within 30 days of completion and the property Anchorage Recording Dlstrlct~ Alas t~. plat of reoord are not Date ' Prepared by: ~ L. BUT~O~ Registered Land S~rveyor 2 1 h~o~t 000 OALLON Irmm $ Barn1 Ho~e / /'~[PT1C TANK I N ~.1o ' I I '~=~.77 gT4 --4: 4.16 I ..or 18. Block 2. Rock I. GII $ul)d~:,.~'~ 7.16 Measurements ore based on F :~) Box 215 I' ~j,. AK 99743 installation inspection notes b.v T. Spurkland, PE, CEO0-O007 MUNICIPAUTY OF ANCHORAGE Department of Health and Human Sen/ices On-Site Sen/ices Program 825 L Street. Room 502 P.O, Box 196650, Anchorage, AK 99519-6650 (907) 343-4744 ON-SITE WASTEWATER DISPOSAL SYSTEM I WATER SUPPLY PERMIT Initial Date Issued: Apr 17, 2000 Expiration Date: Apr 17, 2001 Permit Number:. SW000064 Legal Description: ROCKHILL BLK 2 LT 18 Design Engineer:. 0818 Daniel C. Graham, PE Owner Name: Suzie & Larry Phelps Owner Address: 3930 E. 80th Ave. Anchorage, AK 99507- Parcel ID: 015-362-30 Site Address: 006430 LIMESTONE ClR Lot Size: 52061 SQ. FT. Total Bedrooms: 3 Permit Bedrooms: 3 This permit is for the construction of: [] Disposal Field [] Septic Tank [] Holding Tank [] Privy [] Private Well [] 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 engineer must notify DHHS at least 2 hours prior to each inspection. Provide notification by coiling (907) 343-4744 ( 24 hours ). ( Not required for a Water Supply Permit only ). 4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather must be either. A. Open and closed on the same day. B. Covered, sealed, and heated to prevent freezing. Receiv~ Date: ~'~'~7/ Date: DAN RENSHAW P.E. Consulting Engineer 519 West Eighth Ave. #209 Anchorage, Alaska 99501 CERTIFICATION The attached document represents engineering conducted under my direct supervision for which ! bear primary responsibility. Dan Renshaw has performed professional Civil Engineering Services from offices in Anchorage, Alaska since 1969. Technical Field Services Daniel C. Graham, PE PO Box 215 llealy, Alaska 99743 (907) 683-2480 I April, 2000 Municipality of Anchorage Department of Health and tluman Services Environmental Services Division On-Site Services PO Box 196650 Anchorage, Alaska 99519-6650 RE: Request for Approval to Construct Water and Wastewater System Lot 18, Block 2 Roekhill Subdivision Enclosed is information for your review for the above supply water and wastewater disposal system. The following information includes: · Narrative in support of Application · Results of Percolation testing (Including soil logs) · Design Criteria used to establish design parameters · Plan view of site · Cross section Details of leach field design · Copy of most recent lot survey by Mr. R.L.Button, RLS · Standard construction specifications · Required fee ($300) Please feel free to contact me at 683-9719 or Dan Renshaw, supervising engineer at 276-3474 if you have any questions. 1~ ~tted, Daniel C. Graham, PE Request for Approval to Construct Lot 18, Block 2 Rockhill Subdivision Page 2 Project Information Description: This application is for a new water and septic system for a yet-to-be constructed private residence. House plans call for a 3 bedroom house of standard wood-frame construction. Currently, a house exists on easterly adjoining Lot 17; a permit has been issued for a proposed structure on westerly adjoining Lot 19. Information from both of these structures has been considered in this design. No structure exists on adjoining Lot 26 to the south, nor could a plan or permit for any development be located. Owller: Larry and Suzie Phelps Anchorage, AK (907) 344-7294 Contact regarding project approval: Dan Graham, PE Technical Field Services PO Box 215 Healy, AK 99743 (907) 683-9719 OR Dan Renshaw, PE Anchorage, Alaska (907) 276-3474 Percolation Testing On September 6, 1998, on-site testing was conducted in the area that was tentatively planned for installation ora wastewater system. (Work had been conducted the previous day on the adjoining Lot 19 by Mr. Jeff Garness, PE, Alaska Water and Wastewater Consultants, Inc.) For this project, two test holes were excavated to a depth of 13.0 and 13.5 feet, respectively, at test hole locations I and 2 as shown on the accompanying site plan. The soil logs for these holes are also attached (photos of the holes can be made available upon request). A 2 foot gravel layer was revealed in both holes starting at depths of between 3.5 and 4.5 feet. To ensure the long term function ofthe proposed system, the more confining sand and silt layers below the gravel were tested to determine proper field sizing. In test hole !, a percolation test hole was placed in the silty sand to sandy silt layer below the gravel at a depth of 8 feet. This produced a percolation rate of 8 minutes per inch. This agrees quite well with the adjoining Lot 19 Test hole #2, which had a percolation rate of 9 minutes per inch in similiar strata. A second percolation test hole was located in a silty sand and produced a percolation rate of 27 minutes per inch, matching more closely with hole #1 on Lot 19, which had a rate of 20 minutes per inch. As the desired drain field location has tended closer to hole #1 from this testing ( 8 mirdin) and hole #2 on Lot 19 (9 mirdin), coupled with the fact that these percolation rates are in the middle to lower end of the published 6-15 Request for Approval to Construct Lot 18, Block 2 Rockhill Subdivision Page 3 mirdin range used by the municipality, an application rate of 0.8 gallons per day per square foot of field area wasselected. Both excavations encountered no water during excavation. A l-inch monitor pipe was placed in each test hole prior to backfilling. These were checked 1 week after testing and remained dry. Surrounding well logs show groundwater to be at a depth of near 50 feet. Project Design Criteria The following is a listing of the design steps and criteria used along with the final field sizing: Wastewater application rate: Application rate for design: Minimum initial absorption area: Depth to top of drain field: 3 BDR ~ 150 GPD/BDR = 450 gallons per day 0.8 GPD/Sq. Ft. 563 Sq. Ft. 4 feet Depth to base of drain field: 7 feet Allowance for pipe and gravel cover: 0.5 feet Effective gravel depth: 2.5 feet (30 inches) Published reduction factor for depth: 0.64 Drain field minimum width used: Initial drain field length: Corrected drain field length: Designed drain field length: Final effective absorption area: 5 feet 112.6 feet 72 feet 75 feet 586 Sq. Ft. > minimum area Summary - the wastewater can be adequately handled by a wide drainfield excavated to a depth of 7 feet deep, 75 feet long and a width of 5 feet. This can be filled with 30 inches of+l/2" by -2.5 inch washed drain rock up to a depth of 4.5 feet. Seventy feet of 4" perforated drain pipe will be placed on · top ofthis and another 6 inches of drain rock added to cover the pipe. After a filter cloth is placed over the drain field, the excavated soil can be replaced and mounded. This should provide in excess of 4 feet of cover over the top of the field. Other factors that were considered in the design: Separation distances from adjoining wells, leach fields and lot lines - the Site Plan shows that all separation distances have been met and no waivers are being requested. Topography - The area has no ground slope that needs to be considered for field sizing and design. Surface and Groundwater - As stated earlier, no groundwater was encountered and indications are that the top of the groundwater surface is near 50 feet below existing ground. No surface water were visible on this or the adjoining lots. Technical Field Services PO Box 215 llealy, Alaska 99743 SOILS LOG - PERCOLATION TEST Depth Legal Description/Owner: Lot 18, Block 2, Rockhill Subdivision/Susie and Larry Phelps Performed By: D.C.Graham, PE Date Performed: 9/6/98 Test Hole #: I *See site map for hole Depth to Groundwate Date Dry 9/6/98 Dry 9/16/98 0-2 GC - Mixed Gravel and Clay 2-3.5 ~' Silty sand Date Reading ClockTime ,lelTime WaterLevel NetDrop 06oSep-98 Presoak 11:55 8 I/4 Add water 3:55 7 7/8 and start 4:25 0:30 I I I/2 3 5/8 Set #2 4:25 7 13/16 4:55 0:30 II I/2 3 II/l~ Set #3' 4:55 8 1/4 5:25 0:3~ II 9/16 3 5/16 *Bad Reading ;et#4 5:25 7 1/16 5:55 0:30 l0 3/4 3 Il/16 ,, gravel 5.5-7.0 , Silty sand -13.0 ML/SM - Silt, Sandy silt BOll- 13.0 Percolation Rate: 8 (min/in) tlole Dia: 6 in Top ofhole: 8 ft Base ofhole: .8.5 R 14 Comments: Perc test was performed on the more confining silty sand layer rather than GP layer available with a faster perc rate for conservative design purposes. Performed by Technical Field Services: I, ~ ~Z~h,~4'--., certify that this test was performed in accordance with all State and Municipal guidelines in effect on the date the test was performed. CO CO CO CO ~'ound Man. Tube CO Comportment ~ of Ex~avation 0 3bric to cover drain rock Drain rock to be +1/2' by -2 1/2' Clean outs and Pipe between tank and bed to be 4' Dia D-3034 Non-perf DisstribuUon pipe to be 4" Dia F-180 Perf. Pipe Monitor tube to be perforated in drolnfield exposure Length of drainfield to be 75' minimum Width of drolnfield to be 5' minimum Sect;on Detans Lot 18. Block 2. Rock Hill Subdivision WkJe Dralnt~mld Technical Field Services I Scale** NA PO Box 215 I Heel),. AK 99743 Dr. By. DCG April 1. 2000 Technical Field Services PO Box 215 Healy, Alaska 99743 SOILS LOG - PERCOLATION TEST Legal Description/Owner: Lot 18, Block 2, Rockhill Subdivision/Susie and Larry Phelps Performed By: D.C.Graham, PE Date Performed: 9/6/98 Depth Test tlole #: 2 *See site map 0 2 3-2 SC - Mixed Gravel and Clay Depth to Groundwate Date Dry 9/6/9~ Dry 9/16/9[ 3 2-4.5 SP/SM - Grey Silty sand Sandy gravel 63-8.5 8 SP/SM - Grey Silty sand 8.5-I 1.5 SP - silty sand, dry Date Reading ClockTimc qctTimc WaterLevel %tDrop 06-Sep-98 Presoak I 1:50 6 5/8 Add water and start 3:50 6 4:20 0:30 7 I/4 I I/4 Set #2 4:20 6 I/8 4:50 0:30 7 I/4 I I/ii Set #3 4:50 6 5:20 0:30 7 I/8 I I/~ Percolation Rate: 27 (mtn/in) 12 tlole Dia: 6 in 11.5-13.5 Top ofhole: 8.5 ft 13 MtYSM - Silt, Sandy silt Base of hole: 9 ft BOllat 13.5 Comments: Perc test was performed on the more confining silty sand layer rather than GP layer available with a faster perc rate for conservative design purposes. Performed by Technical Field Services: I, ~ ~,..rvgO4~ , certify that this test was performed in accordance with all State and Municipal guidelines in effect on the date the test was performed. It ~s'lhe responCbility of the owne¢ or ~lldeto prior 1o construction, to verify propa~cl b,mildlng gro~o relollve to finish~ OrO~ on~ ~ii~ Con- ;LOT/'7' Prepared by: /?' £' BUTTON '.LEGEND Brasl or Aluminum caP~ed monumenl 0 Iron pipe and/or rebar recovered 2 x2 hub & tack recovered · 5/8"x~0" rebor set this survey Anchoroge Recording District, Alaska ~,OT SURVEY CERTIF CATION, Scale Date Ref. Registered Land Surveyor DAN RENSHAW P.E. Consulting Engineer 519 West Efghth Ave. #209 Anchorage, Alaska CERTIFICATION The attached document represents engineering conducted under my direct supervision for which I bear primary responsibility. Dan Renshaw has performed professional Civil Engineering Services from offices in Anchorage, Alaska since 1969. Technical Field Services PO Box 215 tlealy, AK 99743 Standard Construction Specifications Well (See attached relevant section of Anchorage Municipal Code 15-55) Wastewater Disposal System I. The scope of the project consists of installing ASTM D3034 (PVC) or ASTM D2661 (ABS) 4' diameter pipe from the foundation area to a new 1000 gallon 2 compartment septic tank, which is also a part of this project. The pipe shall be set at a grade no less than ¼" per foot. In addition, similar pipe shall be run at a grade no less than 1/8" per foot from the tank outlet to a wide bed drain field as depicted in the approved design, which is also part of thls project. 2. Construction shall be as depicted on the appruved site plan and deslgn drawings. Minordeviations from these drawings may be allowed or required by the engineer conducting the inspections. All construction procedures and material specifications shall conform with the Municipal and State requirements. 3. The contractor shall be responsible to obtain the necessary utility locates, and to work around any buried utilities. 4. The contractor shall provide adequate cover material and rough regrading over all system components to ensure that proper drainage is achieved after settlement and that there are no residual depressions. Insofar as possible the contractor shall minimize damage to trees and existing lawn areas. 5. Unless specifically agreed otherwise, the homeowner shall be responsible for finish grading after the soil is compacted, as well as placement of topsoil and seeding all areas disturbed by the construction. Septic Tank: I. The new 1000 gallon, 2 compartment septic tank shall be Municipality approved and shall be set level on undisturbed soil. Each compartment shall be equipped with a water tight manhole cover an a 4" clean-out. If the tank is buried less than 4 feet below final ground surface, it shall be insulated with 2 inches of appruved burial type, rigid insulation. 2. All pipe connections lo the tank shall be equipped with waterproof mechanical couplings. The waste line from the residence to the septic tank shall have a minimum slope of ¼" per foot, and the waste line from the tank to the soil absorption system shall have a minimum slope of I/g" per foot. A clean-out shall be installed greater than I foot but not greater than 5 feet from the foundation of the building. A clean-out shall also be installed at any 90 degree bends, at each end of the drain field pipe, and a double clean, out is required between the septic tank and the drain field. Soil Absorption System: I. The soil absorption system (also referred to as the drain field) shall be constructed by excavating a trench to a total depth of 7 feet below original ground level in the vicinity of test hole #1, This depth may be altered pending results of the post.excavation inspection (see below). 2. The bottom of the excavation shall be level. Any compacted or smeared surfaces shall be raked to allow for proper infiltration. Sand for leveling or serving as filter material shall comply with Municipality specifications. Technical Field Services PO Box215 llealy, AK 99743 3. A total of 4 feet of approved sewer gravel shall be placed in the bottom of the excavation with the perforated distribution line laid level such that the inverts are no less than 3.4 feet above the bottom of the sewer gravel. Sewer gravel shall be +1/2" and -2 Va" screened rock, with less than 3% passing the #200 sieve. 4. Monitor tubes and clean-out pipes shall be of 4" diameter and installed in the locations shown on the design drawings. The portion of the monitor tube extending through the gravel shall be perforated. 5. Approved filter fabric shall be placed over the entire top surface of the sewer gravel. A minimum of 3 feet of soil is to cover the fabric. 6. The top surface of the cover material shall be raised a minimum of 12 inches above the surrounding terrain to allow for settlement, and shall be graded to smooth contours. Fill slopes shall be no steeper than 311:IV. 7. Unless specifically agreed otherwise the homeowner shall be responsible for arranging to have the site finish graded after the backfill material has stabilized, and for placement of adequate topsoil and seed to promote rapid revegetation of all areas diturbed by the construction. I. A minimum of 4 engineering inspections will be required during the course of the project: (I) initlal stake-out with the contractor to establish the location of the system and to discuss the plans, specifications and construction procedures, (2) after the native material has been excavated to expose the infiltrative surface to ensure that it is level, at the right elevation, uncompacted and conforms with the soll log information, (3) after the sewer gravel is in place and the distribution pipes have been laid and connected up to the septic tank, but prior to placement of filter fabric, and (4) after rough backfill and grading is complete. The septic tank requires one inspection after it is set level and the piping is connected, but prior to backfill. This inspection may be incorporated with any of the other 4 inspections. 2. The installer shall coordinate the timing of the inspections with the angineer sufficiently far in advance Io ensure availability of the engineer. 15.55.060 MUNICIPAL COD£ ~fINIMUM SEFARATI TION DISTANCE SEPARATION OF FEET / ~nn FROM P~e sewer line 25 Cum~ dr~ 2~ Hydroca~n Sewer t~ ~e ~y so.ce of p~nti~ Solid waste hold~ 75 t~ Sep~c abso~fio~eld ~ ~00 Sewer or cle~out ~ ~ feed lo~, shel- :e~d cont~p~ent ~%%11 drilling. The commercial drilling of a well and subsequent recompletion/deepening op- eration shall be performed by a licensed well driller. Any drilling method used in the construc- tion of a well shall meet the following require- merits: 1. The ground surface surrounding the well for at least ten feet shall be sloped or contoured to allow surface water to dra~n away from the well. 2. The well driller shall exercise reasonable care during excavation or drilllng opera- tion to prevent contamination to any aqui- fer. 3. Organic drilling fluid may be used only ff' the fluid is approved for that use by the National Sanitation Foundation (NSF) or by an equivalent org..ization; these flu- ids ~re listed in NSF Stendard 60 and NSF Standard 61 and in associated prod- uct listings described in these two stan- dards. 4. Waterused in the ck4111~g process sh~11 be obtained from a source providing potable water. 5. Water wells sh~ll be drilled and cased with non.perforated pipe to a minimum depth of 40 feet in unconsolidated mate- rials such as sand and gravel. In cases where bedrock is encountered before the ~.~mum depth, the casing shall be driven and sealed at least three feet into bedrock or to casing refusal, except where the d~lllng contractor or property owner has obtained a written variance from this provision from the department. Such vari- ance shall be granted only upon a finding by the department that the construction permitted under the variance will be sound and will not materially reduce the purity and safety of the water supply. D. Well casing. All casing installed shall be of steel in new or Like new condition free of pits or bre~1~ or of the material best suited for this purpose available through the highest state of modern technology. The following wall thickness shall be used, except that all casing greater than the nominal size of six inches shall have a wall thickness of at least 0.250 inches: NOMINAL SIZE (INSIDE DI. OUTSIDE DI. WALL THICK. AMETER) AMETER NESS (INCHES) (INCHES) (INCHES) 4 4.50 0.237 5 5.50 O.244 5.5 6.00 0.245 6.125 (6Va~) I 6.625 (6~/s~) 0.250 Joints. All casing joints shall be screw- coupled or welded and shall be water tight. If welded joints axe used, the weld shall be at least as thick as the thickness of the well casing. Grouting. Grouting the outer ~--ular space is necessary to prevent shallow non- potable water or surface waters from eh- ter~g into a potable water aquifer. All wells shall be grouted with bentonite slurry or granules as follows: a. From the pitless adapter level to at least ten feet below the pitless adapter installation; or Supp. No. I~L~. 1 AMC 15.55--6 WATER ~q~LLS b. From the pitless adapter level three feet into bedrock or to casing refusal if bedrock is encountered at a depth of 15 feet or less; or c. From the surface to a minimum of 20 feet below the surface. 3. Pitless adapters. When installed, pitless adapters shall be one of the types ap- proved by the department. 4. Well ce, zing stick up. All well casing shall extend a minimum of 18 inches above the natural ground surface with the ground sloped to drain away from the casing. 5. Well seal. The top of the casing shall be closed with a sanitary seal of a type ap- proved by the department. 6. Drive shve. When the casing is driven or otherwise forced into the well bore, the bottom of the casing shall be protected from damage by the use of a drive shoe or mechanical device. 7. Perforating or slotting, perforating or slot- ting cf the casing utilized for the purpose of allowing water to enter the well from water bearing aquifers encountered above the bottom cf the casing shall not extend higher than 40 feet below the ground surface, unless it meets the requirements of subsection 15.55.060.C.5. E. Minimum water well production and test- ing. If the minimum sustained rate of production and recovery of a well is less than 150 gallons per day per bedroom as determined by a well yield test and/or recovery test, water storage facilities shall be installed. 1. Well yield testing. A well yield test shall be performed by a licensed well driller or pump installer er a registered civil engi- neer or a hydrogeologist. The well yield test shall be performed by bailing, air lifting or by pumping. The well yield test shall accurately determine the well's sus- tained productivity from test data includ- ing but not limited to static water level, pumping water level, drawdo~a rate, re- covery rate or any other information use- ful in determining the sustained produc- lng rate. If the well's initia~ product'ion rate is less than 1.U. per minute, the department may re~. additional testing by alternative methoc~ F. Well disinfection. Wells shall be dis/nfected~- in accordance with this subsection as follows: New or deepened wells. Immediately after completion of d.~lling or deepening wells, the well shall be disinfected. After the well has been flushed of drill cut'tings, apply a chlorine compound proportioned to provide a concentration of at least 50 ppm as free chlorine to the entire volume of water in the well bore. The chlorine shall be introduced into the well in a manner which will distribute it through- out the entire water depth. Allow the chlorinated water to remain in the well undisturbed for at least 24 liours. 2. Hydrofractured or re.developed wel~. ~2(de redeveloping or hydrofracturing wells and insofar as possible, a free chlorine resid- ual in the well of at least five ppm shall be maintained. 3. Pump work. On completion of pump in- stallation work, a chlorine compound pro- portioned to provide a concentration of at least 50 ppm as free chlorine to the entire volume of water in the well bore shall be applied. After chlorine is introduced, wa- ter sh~ll be circulated in the well so that it reaches all parts of the pumping equip- ment, inside and out and the chlorinated water shall be allowed to remain in the well for at least ! hour. 4. Flushing. After the required disinfection time has expired the well shall be flushed of ail chlorinated water before being placed in service. If the chlorinated wa~er must be discharged d/rectly to a sensitive re- ceiving environment, the chlorine shall be neutralized before discharge. G. Well identification. All wells shall be la- beled with a durable form of construction infor- mation upon completion. The construction infor- mation source shall be secured to the well casing and contain the following information: 1. The name of the drilling contractor; Supp. No. I~L~. 1 AMC 15.55--7 15.55.060 ANCHOKAGE MUNICIPAL CODE 2. The date the well was completed; 3. The total depth; 4. The total depth of casing; 5. The location and type of well completion; 6. Static water level below the top of the casing; ?. Yield; and 8. Height of casing above fmlshed grade. 'H. Well logs and as.built. The licensed well driller shall provide a well log to the property owner within 30 days of completion of the well. Within 60 days following the completion of the well or drilling activity, the property owner shall submit to the department a copy of the well log, the results of other drilling activities conducted under the permit, and an as-built drawing on an 8V2 by 11 inch sheet to a scale of not smaller than one inch to 50 feet showing all data and informa- tion shown on the site permit plan including the location of the well and/or other drilling activities. 1. The well log shall include at least the following pertinent information: a. The property owner's name; b. The legal description and street ad- dress; c. The method of ch-illlng (rotar); cable tool, etc.); d. A description, relative depth, and thickness of each soil stratum pene- trated from the ground surface to the total depth; e. The relative depth and thickness of each water bearing stratum (aqul- fer) penetrated; f. The total depth drilled; g. The length, diameter, wall thickness ' and type of casing used; h. A description of the liner (if used) and the length and setting depth; i. The depth and number of perfora- tions, (if any) in the casing and/or liner; j. The type and location of any screens used; k. The static water level and drawdown level; 1. The well production test results in- cluding the method of testing; m. The dates of commencement and com- pletion of drill~g operations; n. The number and date of the well drilling permit issu. ed by the dep~r~- merit; o. The name and address of the li- censed well driller; and p. A description of the method of disin- fection process used upon comple- tion of the well. I. Water quality standards. Water used for domestic purposes shall not contain concentra- tions exceeding the following ratios: l. Total coliform bacteria- 0 colon/es per 100 mi. 2. Nitrate - 10 mg per liter. 3. Other bacteria - 10 colon/es per 100 ml. or permanently decommissioned in subsection: cap 2. Permanent~ md in- tight ,oneof the followin a. Perforate th, g from the bottom to within five land sur- face, remove five feet, then pressure ~gth. b. and fill the borehol clay, or be[ngwith- Co below ground level and ing with a concrete m feet cas- Supp. No. },IA 1 AMC 15.55--8