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Home My WebLink AboutGREENBROOK BLK 5 LT 2 MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEAl_TH & ENVIRONMENTAL PRO'rECTION ENVIRONMENTAL ENGINEERING DIVISION 825 L Street- Anchorage, Alaska 99501 Telephone 264-4720 ON-SITE SEWAGE DISPOSAL SYSTEM AND/OR WEI,L INSPECTION REPORT NEW NAM E/,,.-~ MAI LI N~DDR ESS-~ DESCRIPTION LOCATIONFk~.,,~ I'"F- ~ Well /I I Absolption area ~ D,STANCETO: I I'f'Zrjq ~00 L Manufacturel~ ~ e~/-- [ Liq,~allons [ IF HOMEMADE: 'nzide length Dwelling Manufacturer Well '~ '' ~ Total len_~o~ Ii nas No. of ines~ ~Length~achline Top ~ tile to finish grade ~ - ~ Material beneath tile Length Width Deptl~ Type~f crJ~ Crib diamete~~ Crib depth ~~ Wel~ Building foundation DISTANCE TO: ' Width NO. O F _B..~OOM~S No. of co~..~tments Liquid depth PERMIT NO. jlYlateri_._~aI Liquid capacity in gallons ~-~ inches Dmtance LEZ~nas -- ~ O~r't'°narea inches Total effect' L~a~ p ' PERM T NO, -~ ~Class DISTANCE TO: Total effective absorption area Nearest lot line Depth Driller Distance to lot line PERMIT NO. Building foundation Sewer line Septic tank Absorption area(s) OTHER PIPE MATER IA~- SO,,TEST RAT, NO REMARKS DATE LEGAL PEF:H I T I'*i 3 FI P F'L I C F:IN'I' I '" r.":F:iT I 0 N L.. E G l::ll .... :ii:'" F~'GE Hh F.I~ I ::, _ I,I SE'.FI -- r . ..... ~. FII'.]CH. FII'::i F'l~i'. E I 'T'G t_C'f' 2 E:I...I.( 5 GF::EEI'.,IE:F.'.OOK '._:;,l_l~l L(]I'T T'T'F'E OF '.F:OII.._ FlEE ::F:F'TICff.,I .:,~ .:,1Erl ]:rE;' '1F. EP.,I_.H i'"IFI::.::IHUH t'.1 .i','IE:EF;: [)F: E:[~.E:,F.:OEd',IS := 'TF.Ili~:: F~:E:L::!U I F;.':EI:) :51 ZE OF "I"HE :E..';O I L RE:SOF;.:F'T I 01'.,1 .: ~ .r.' 7 E,I I I S: THE I....ENGTt'4 [:' I HENS I O1'.,I I '..:.; THE LEt"J.G'T'H ,:: I N F:EET ::, 01:"- TH.E: 'I"F;:EI'.,ICH OR [:,F::F:I I NFI EL.E:,. THI?. [:,EF"I"H OF:: R TF:ENCH CIR F'ZT I:.--., THE' [.',ISTF:INCE BETFIEEN THE SUF.':F::FIE:E OF "I"HI:'E: GF;:'.OI...IND FIN[:, THE BOTTOM LqF THE ENCR',,,'R'T'IEff',I ,:: :[1'.,I FEET'.:,. THERE: IS BIO SET 14I[:,TI~I FOR TRE:NCHES. THE (:.:iF;]'.I::I',,,~EL. DEF'TH I S THE M ! I'41 MUM E:,EF'TH f"lF GRFI'v'EI... E:ETHIEEN THE: OUTF-"'FtLI.... F'I FIND THE E:OT"I"OM OF'" THE E::.:',CFt'v'FITILqI'.4 (IN FEET). F::'EF.':M.I: T FIF'F:'L I E:FtI'.,IT HFIS THE F.:E::.'i;F'OI",IS ]: E: I L.. I T"r' T ] I NFOF::M 'FH I :.:..'; [:,EF'FIF..'.Tr,'!EI'.,tT [)l..J[;~: .f. I'.4G THE ItxI?..:;TFILL. FIT ]: Efi'.,I INSPE:CT;[CI'.,IS CIF FtI",I'T' NELL:5 FI[:'3RCEi",IT TO THI:;:, F"R~FEFq", FII",!.B' THE i'.IJr,llEEI;'. OF RE..-:,I[:,ENCES THFIT THE HELL HI[...L. SERVE. ................ T' L...~ ,.:Z~ ,:: ,~::.,~ 2, % P-,.li ~.~i; F" EZ ,.~:.*..: -T" 3: ~."Zi P",.~ :"2E;; tF:~ F." E: IF;L" E: {;;:..-" ILJ ][: tF~::: ~.::::. E:: ......................... ........ F',"r' I:::I::tCI-(F'"II....L]iI'.,I[!i (iF FIi",I'T' '.E;'¢STEr"I HITHOIJT F.T. iNFIL. II'.,I'.E;F'IECTICff.,I I:::ll'.,l[i:, I--FFF ,HI THIS I'.:,EF'FtF~:TH.EI'.,tT I.,.I ~ LL E:E '_::;UE:...TECT T(] F'tq:OSECI...IT .[ 0i'.,I. M I P.,I ~ MUM [:, :r. STF1NCE BETHEEN R HELL FIN[.', FIN"r' ON-".:{'; I 'TE SEI.,.IRGE D ]: SF::'O."..:.;FIL. S"P.:..:,"I"EM I S :l..EnEI FrEET F'OR Fl PR]:',,,'RTE 1.4EL. L OR :L50 TO ;.:.,~ElO FEET FROM FI F:'UE',L. ]: C: !4E:LL.. DE:F'EN[:,INEi I...IPOI'.,I TI...I[: T'T'F'E OF F'UBL. tC HELL. I"I ]: I'.,I ]: HUH [.".,ISTFINCE F'ROH FI PF;'.I',,,'FtTE I.,.IEL. L TO Fl F'F:'..f. VFI'T'E SEHEF.: L. ZNE ZS 25 F:'EET I::ll'.,Ig, TO I::1 COMMUNIT'T' SEI.,.IEF.: LII",IE ]:S '75 FEET. OTHER F.:EL".:!IJ I REHENTS MFI"r' FIF::'F'L"r'. ::.:;F'EC I F Z CRT :[ Fd",IS FIND COI",ISTF~:IJC'I" T ON [:' I FiGF.:FIr,'IS FIF;i'.E FI~,,,'FI I LFIE~I_E TO I I'.,ISUF?.E F'ROF'EF:: I I'.,I'.::~;TFiLLFIT 101'.,!. I CEI:;~iT I F'"r' 'I"HFI'T' t.' I I:11'"t FI::IHII...ZFIR I.,.IZ"I"FI THE REE:!IJ]:F',i:IEHEI",tT:::; FOF.: Ul",t-.:,I"t.:. :,E,LIEF .... FINE:' I.,.IELL. S R'.;.i; '::;ET FORTH IE',"r' THE MUNIE:IF'FIL. IT'T' OF RI'-ICHOF~:FIGE. t..UE. Ez,. ;2: I I.,.tII_L INSTFII_L. THE .: r'_-')Erl IN FICF:C~R[:,FINCE I.,.IITH 'I"HE ....... '" 2::: I I...II'.,![:,EF;i::E;TFII'.,I[:, TI'-IFIT THE -t'.!-'2;.~TE SEI.,.tEF;: :.:,r...TEfl MFI'¢ REE,!I..I]'.F~'.E: ENI..FIF;'GEI'"t[TNT ]:F' THE F.':ESIDENCE IS F'.EMODELE[:' "t"O INF:LU[:'E r,lo,~:E THI::II'.,t 4 E~E[:,F.:OOMS. L:i; I GI'.,!ED · ................ d ................................... 5' Z -'ff' ///__ , ,,,..,:- .......... .... ',,,',,,. ,',., Alaska Tes lab 4040 ~B" Street Anchorage, Alaska 99503 Phone (907) 278-1551 ( Telecopier (907) 272-5742 ) March 30, 1981 W.O. #A19708 Second and Fourth Anchorage Limited Partnership 4611 Business Park Blvd. Anchorage, Alaska 99503 Attention: Mr. Les Pace Re: Subsurface Investigation for Suitability of On-Site Sewage Disposal, Lot 7, Block 2, Lot 11, Block 4, Lot 2, Block 5, Greenbrook Subdivision Dear Mr. Pace: On March 14, 1981, we drilled a 15 foot boring on each of the above three lots and placed a perforated, 3/4 inch PVC pipe in each hole so that the water table could be monitored over a period of time and a percolation test run in the hole. The holes were drilled using a Nodwell mounted, Mobile B50 drill rig owned land operated by Denali Drilling, Inc. The drilling was supervised and the test holes logged by Mr. Ted Krupka, senior technician with Alaska Testlab. After th~ holes were drilled, our technician returned on March 18 and checked the water level in each of the test holes. He then returned again on March 23 and checked the water level again, then saturated the holes, let them stand for 24 hours and returned on March 24 to check the water level a third time and then ran a percolation test. The percolation test was run by monitoring the drop in the water table elevation at 10 minute intervals for a minimum of one hour. The percolation rate listed in this report was computed using the slowest 20 minutes of that percolation test. Included with this report is a test hole location sketch for each lot and a log of the boring placed on each lot. The results of this exploration are described as follows: Second and Fourth Anchorage Limited Partnership March 30, 1981 Page Two Lot 7, Block 2 The test hole was placed in the front of the lot, and this is where 'we would recommend the placement of the on-site sewage disposal system. The lot slopes to the back considerably and it appears there could be a water table problem at the very back end of the lot. At the time of drilling no observed ground water table was located. The soil appeared to be moist as the spring thaw was beginning, and there was some seepage near the top of the hole from thawing seasonal frost. When the water table was checked on March 18, there was water standing in the hole at 8..~ feet. When the water table was checked again on March 23, pf~br to saturation for the running of the perc test, the water table had dropped to ~1~1~.5_ feet. The next day when the percolation test was run the hole was dry and there was no water table encountered in the upper 15 feet of the hole. Percolation rate measured was zel~lve~y high 2.0 minutes Der inch. It is our opinion that the - -~'" ~ ground water encountered on March 18 was due to thawing seasonal frost and runoff associated with breakup. The water table dropped very quickly. However, it would be prudent to keep the system as high as possible, in the upper 8 to l0 feet,~ to avoid problems in the spring from breakup on the system. We would also recom~?~end using a more conservative design percolati°n rate Of 5.0 minutes per inch because the upper soils are slightly siltier than the lower soils. Lot 11, Block 4 Again, it would be important to keep the on-site sewage disposal system in the front of the lot near test hole as it appears that there is more of a ground water problem to the back of the lot. No ground water was encountered to ']5 feet in the boring at the time of the exploration on March 14, 1981. On returning on March 18, the water table was measured at 10.5 feet. It was again measured at 10.5 feet on March 23, and again on March 24. The percolation rate measured was 15.0 minutes per inch. Again, the system should be kept as high as possible, in the upper 8 to 10 feet, because of the water associated with the spring thaw, but it does appear that we picked up the highest level that the water rose to during this spring. Lot 2, Block 5 At the time the test hole was drilled on March 14, t981, saturated conditions were encountered at 13 feet. When the water table level was checked on March 18, standing water was in the pipe at Second and Fourth Anchorage Limited Partership March 30, 1981 11.5 feet. When it was checked again on March 23, the water level was at 13.5 feet. On March 24, prior to the running of the percolation test, the water level was at 11.5 feet. Measured percolation rate was 2.0 minutes per inch. However, because of the silty nature of the soil we would recommend a more conserva- tive value of 5.0 minutes per inch be used. Also, again, the system should be kept as high as possible to avoid any conflict with any seasonal fluctuation of the ground water associated with thaw. ~Should you have any questions with regard to these tests, please do not hesitate to contact us. Very sincerely, ALASKA TESTLAB Melvin R. Nichols, P.E. Manager MRN/mg Attachments cc: Ralph Westover, Tryck, Nyman & Hayes . 2t6.70 .60 ~30 .- N~go0~ 0~, -- .. '6'g5 ' i I 03,00', 2 183.00 Z ~03.00 4 183.00 103.00 ) Lot 7, Block 2 Table B MO #A19708 Date: 3/14/81 Logged by: T. Krupka Depth in Feet From To 0.0 7.0 7.0 15.0 Soil Description F-2/F-4, brown Silty Sand, SM, silt to 40%, moist F-2/F-4, brown Silty Gravelly Sand, SM, particles to 1", silt to 30%, saturated by 10' Set 3/4" perforated PVC pipe to run perc test and to monitor water table elevation. Measured perc rate = 2.0 minutes/inch. Recommended design rate = 5.0 minutes/inch. Bottom of Test Hole: Frost Line: -Free Water Level: 15.0 Feet 1o0 Foot 3/14/81 - 10.0 Feet 3/18/81 - 8.5 Feet 3/23/81 - 10.5 Feet 3/24/81 -.No Water Observed 1318.5G 08,0 1320.00 6.L.O. 1e,58 Rood ,~. 30 30 -- ".., 9.40 1~19140 --~_~.A=40Ol§' - T=97.11 /O 2 ~65. 122 ~,. /4 /3 '22'W // /2 tO.o Ulil, Esrn~. O N 89°5 G'lO"W 105.00 ? Lot 11, Block 4 Depth in Feet From To 0.0 0.5 0.5 15.0 Table A ~WO #A19708 Date: 3/14/81 Logged by: T. Krupka Soil Description Organic cover F-2/F-4, brown Silty Sand, SM, with some gravel (10%) to 3/4", silt to 30%, firm, moist Set 3/4" perforated PVC pipe to run perc test and to monitor water table elevation. Perc rate = 15.0 minutes/inch. Bottom of Test Hole: Frost Line: Free Water Level: 15.0 Feet 1.0 Foot 3/14/81 - Non Observed 3/18/81 - 10.5 Feet 3/23/81 - 10.5 Feet 3/24/81 - 10.5 Feet Lot 2, Block 5 Table C WO #A19708 Date: 3/14/81 Logged by: T. Krupka Depth in Feet From To 0.0 15.0 Soil Description F-2/F-4, brown Silty Gravelly Sand, SM, gravel to 3/4", silt content to 40%, saturated by 13.0' Set 3/4" perforated PVC pipe to run perc test and to monitor water table elevation. Measured per rate = 2.0 minutes/inch. Recommended design rate = 5.0 minutes/inch. Bottom of Test Hole: Frost Line: Free Water Level: 15.0 Feet 1.0 Foot 3/14/81 - 13.0 Feet 3/18/81 - 11.5 Feet 3/23/81 - 13.5 Feet 3/24/81 - 11.5 Feet Test Hole Lo!l - Description Guide The soil descriptions shown on the lugs are thc best estimate of the characteristics at thc time of field examinauon and as such do not achieve thc precision of a laboratory testing procedure. If the log includes soils samples, those samples receive an independent textural classification in the laboratory to verify the field examination. The logs often include the following items: Depth Interval - usually shown to 0.1 foot, within that zone no significant change in soil type was observed through drill action, direct ' observation or sampling. Frost Classification - NFS, Fl, F2, F3, F4, see "Soll Classification Chart" Texture tlr Soil -- An engineering classification of the soils by particle size and proportion, see "Soil Classification Chart", note the proportions are approximate and mudifications to the soil group due to stratification, inclusions and changes m properties are included. Moisture Content thisis a qualitative measure: d_iy_, ,, or little apparent surface moisture, damp, moisture forms portion of color, less than plastic limit, wet, no frec water, often soft, il' cohesive soil, saturated, free water may be squeezed out, if a free draining soil', ~ilatent at natural moisture content, if a non-plastic silt or fine sand. (The moisture content is further definedby reference to PI, LW, NP, M% or dilatency.) Density - refers to more-or-less non-cohesive softs, such as sand gravel mixtures with or without a fine fraction, derived from drilling action and/or sample data: usually described as: very loose, loose, medium dense, very dense. G~neral intent is to portray earthwork characteristics. Stiffness - refers to more.or-l~ss cohesive soils and fine grained silts of ~silt groups. Derived from drill action and/or sample data. Very soft, soft, stiff, very stiff and hard are commonly used terms. Particle size - The largest particle recovered by the split spoon is 1-3/8", Shelby tube 3", auger flights (minute-man) 2". Auger flights {B-50 hollow stem) 6"-8". Larger particles are described indirectly by action of the drftling and are referred to .~s cobbles, 3" to 8", or boulders 8"+. Therefore when reviewing the gradation sheets, if any, the description on the hole log must be considered for an indication of Larger particles. Unified Sod Classification - This is a two letter code. See Unified Classification sheet for further definition. In som~ cases AASHO and/or FAA soil classifications may be shown as well as the unified. Atterberg Limits - useful for fine grained and other plastic soils. Pli n~tur.H mmsturc content believed to be less than plastic limit PI+; natural moisture content believed to be between plastic and liquid L..~i natural moisture content believed to be greater than liquid limit · NP; non-plastic, useful as i modifying description of some silty Dilatencv - Is the ability of w,~ter to migrate to the surface of a saturated~'or nearly saturated ~od sample when vibrated or jolted -- used as an aid to determine If a fine grained soil ~s s shghtly or non-pls~tic silt or ~ volcanic ash, Rock flour - finely ground soil that is not plastic but otherwise appears simi~r to i clayey silt, Organic Content - usually described as Peat, PT, sometimes includes discrete particles such as wood, coal, etc. as a modifier to an inorganic soil. Quantity described as; trace, ar an estimate of volume, or, in case of all organic, - as Peat. This may include tundra, muskeg and bog material. Muck - a modifier used to describe very soft, semi-organic depostts usually occuring below a peat deposit. Arn0rphus pea! -. organic particles nearly or fully disintegrated. Fibrou~ Peat - organic particles more-or-less intact· Bottom of Testhole - includes last sample interval· Frost Line - seasonal frost depth as described by drilling action and/or ~the time of drilling. Frozen Ground - other than frost line, described by samples, usually includes description of ice content, often will include modified Unified Classification for frozen soil/ - this is a special case related to permafrost studies. Free Water Level - The free water level noted during drilling. This is not necessarily the static water table at the time of drilling or ar other seasons. Static water table determination in other than very permeable soils requires observation wells or piezometer installations, used only m special cases. Blow/6" - The number of blows of a 140 weight free falling 30" to advance a 2" split spoon 6"; the number of blows for a 12" advance is, by definition, the standard penetration. ,4% - natural moisture content of the soil sample, usually not performed on clean sands or gravels below the water table. Type of Sample - S._..P, relers to 2" split spoon driven into the soil by 140 pound weight, a disturbed sample, S, thin wall tube, "Shelby" used to obtain undisturbed samples of fine grained soil, fi, "grab" disturbed sample from auger flights or wall of trench, ~, cut sample, undisturbed sample from wall of trench. Dry Strength - a useful indicator of a soil's clayey fraction, N=None, L=Low, M=Medium, H=Higb Group - The r~mples are placed int. ~pparently similar groups based ~n color and texture and are arbitrarily assigned a group iette~. Further disturbed tests including Aucrbc~g Lmms. grain s~zc, moistu~e.dcnslly TEXTURAL SOIL CLASSIFICATION CHART GRAVEL 30 % CLAY ',1/ CLAYE CLAYEY / OR;: OR SIL'rY' : SILTY SAND k~: ~ SAND,, GRAVEL GRAVELLY SAND GRAVEL 0 I0 20; 30 40 50 60 70 80 90 I00 GRAVEL (+ ~4 SCREEN) % BY WEIGHT FROST CLASSIFICATION SYSTEM NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LESS THAN 3% FINER THAN 0,02 mm. GROUPS OF FROST-SUSCEPTIBLE SOILS: F1 GRAVELLY SOILS CONTAINING BETWEEN 3 AND 20% FINER THAN 0.02 mm, F2 SANDY SOILS CONTAINING BETWEEN 3 AND 15% FINER THAN 0.02 mm. F3 a. GRAVELLY SOILS CONTAINING N4ORETHAN 20% FINER THAN 0,02 mm. AND SANDY SOILS ' (EXCEPT FINE SILTY, SANDS) CONTAINING MORE THAN I5% FINER THAN 0.02 mm. b. CLAYS WITH PLAStTICITY INDEXES OF MORE THAN 12. EXCEPT VARVED CLAYS. F4 a, ALL SILTS INCLUDING SANDY SILTS. b. FINE SILTY SANDS CONTAINING MORE THAN 15% FINER THAN 0,02 mm. ¢. LEAN CLAYS WITH PLASTICITY INDEXES OF LESS THAN ]2. d. VARVED CLAYS. APPLF NT FILLS OUT UPPER HA' 'ONLY MailingAddress Atq(/,,/'z(t~-~ ~'~(/'~ Buyer Address / ¢' Zip Code Lending,nstit.tion ~ --'~;<~' ..... '< I ~'7 ~,~L ~.-,~'- ,:.-.:: P.ons Address Zip Code ~,~ Address Zip Code Legal Description .-, a" Street Location ._/~, ,,/5~-'~ r,~,~,, Type of Residence ('"".-.-"//I /~.:, Single Family Multiple Family NO. of Bedrooms [] Other Water Supply [] Individual ATTACH WELL LOG. A well log is required for all wells drilled since June 1975. ~,Community For wells drilled prior 1o that date, give well depth (attach log if available). [~ Public Utility Sewer Disposal ~_.lndividual Year Individual Installed: / r~// '~'~ ' [] Public Utility When Connected to Public Utility: [] Holding Tank NOTE: THE INSPECTION FEE MUST ACCOMPANY EACH REQUEST BEFORE PROCESSING CAN BE INITIATED, 'rime Time Time Time Inspector Inspeclor Inspector Inspector Field Notes: (_-~ } APPROVED BEDROOMS "CONDITIONS OF APPROVAL ( ) DISAPPROVED ( ) CONDITIONAL APPROVAL' DATE Soils Rating Date Sewer installed Well To Absorption Area Well Log Received ,~2.023 (3/82)