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HomeMy WebLinkAboutMCCABE EAST Plat# 83-344 S-6305 'Alaska Testlab 4040 "B" Street Anchorage, Alaska 99503 Phone (907) 278-1551 March 22, 1982 W.O. ~A20327 ® ( Telecopier (9071 272-5742 ) [-t.V~ Lounsbury & Associates 723 West 6th Aw~nue Anchorage, Alaska 99501 At,~entlon. Mr. Darl Kausvger Subject: DeArmoun Property Site Investigat±on Gentlemen: Transmitted here~n are the results of a soils investi~at:[on per'formed by Alaska Test!ab on March 12 through March !7, 1982, for the pu:cpt~se of determmnmng soil sui.tab[]fLy o~ on.- site sewage disposal systems at the above re~erenced Pi.ye test h.oles were drilled uffilyzing a B-50 track mounte,i Nodwell drill rig us:kng a four (4) inch, cent.l, nu,:_~us sol'Nfl flight auger, owned and operated by Dena!J Dri!ifr~g~ inc~ Test holes were logged by Mr. Terry Barber, Engineering Geologist with Alaska Teshlab. Grab samples were colieeLed from 'the a. ugeF cuttings at approximaheiy five (5) foot intervals, placed in plastic bags to p~eserve the natural moisture content, and transoorted to Alaska Tes-tlab~ The site is vegetated with alder, birch and black spruce trees, llt grades down ~owards the southwest with a hollow' diagonally crossing from the northeast to the southwest corner of the propert}~. There is considerable topographic relief {approximately 30 to 40 f~e~t) frem the rep of the northeast corner to the bottem ef the hollow. Figure 1 is a topographic sketch of the si.re, and incl. udes test ho].e locations. He stibsu, rface groundwater was obse£ve{[ 111 a[iy o~l {:]ie t(!st ho].es during drilling, or 24 hours after d};i!ling. The soils encountered censist of a thin mantle of topsoil p]]eximately 1.5 ~eet hhick underlaltl by layerod silts (ML) , ....... ]t~ ~,il.. (SM, SP/SM) and silty sa'hdv gravels (GH/GP) !F-est holes ], z, 3, and 5 were presoaked f'or 24 hours and ~erc(~lation tests run in each hole in accordance wi'th pro- cedures s~h ~:orLn in tne~ ~_~:.[.i~n,t ~ ~~ ............ ~r~. ~.t .... m.d ,.kt.,e~.n depths of ,~ f:eet:, and $ 6 0.5 JUN 1 6 1982 .. uoeat 2. I% We recommend the fo].lowin~; percolation Fates ho be ~ ~'' the d~s~¢.tn of disposal systems at these locations: Test Hol:. ~tl 2 o 5 minutes per inch Test [lo].e ~2 10 minutes per inch '7{r.l~ T.~st IIole ~4 34 m/[nutes per inch~f Test HoJ.e ~5 -- ]l~mSnut~:s':~ per inch . The test holes shown were located by pacing, and thero, fore are only approximate. The attached locat]_on sketch, test bole logs, grain size curves and explanatory information complete this report. !f you have any questions, please do not hesitate to con-tack ~l S. Sincerely, ALASKA TESTY,AB ..... ' /f2 ,/ Terry ~. Barber Engineering Geologist: App,_ o ,, ~-d; Nelvin R. Nichols Manager 'I'LB: k f Attachmer, t (s) DEARHOt~ PROPERTY !4.0. !',20327 C, RI. D 2937 IIOLE LOCATIO;~ TEST ligTE Test Hole #1 Table WO ~.A20:327 Date: ../1-)/~,, hogged Dy: TB pS[~.!L_jl'L_FFet.. From To 0 1,5 1.5 2,5 2,5 8,0 8.0 11.0 11. o 16.5 Soil F4, Brown organic aandy Silt, 1'2 L_own gravelly Sa. nd (SM) (OL) ~ (Topseii} .5, Brown silty sandy 9:'/i{[y.%]m, (G,M/GP), sub- rounded ].-1/2" tO 2" 9'ravel~ i0%. to 20% ,.~.~mp, medium dense F2/NFS, Brown graw~.~ly. =~;---San~) ,, ,, with ~.~ trace silt, subrouneed i t~ 2" gr~ve.l, med~uin dense, damp k ~/ 5% tO 15% silt, subr~Ri-~-~' 2'~ gravel, dry to damp, medxum dense 16.5 Ft. Bottom of Teat: hole: Frost: Line: Free. Water Level: 2.5 Ft. None observed. Sample Type of Number Depth Sample Unified 1 2,5' 2 5,0' 3. 10~0' 4 16,5' G GM/GP G SP/SM G GP/GM - G GP,/GH ~ Reiuark. s: I. 3. 4. 5. 6. Type of Sample, G=Grab, SPT = Standard Penetrat:ton, U = Undisturbed. Dry Strength, N=None, L=Low, M,-Medium, H=HJ~gh~ Group refers to similar material, this study General lnfcM'mation, see Sheet '1 . Frost and Textural C].assifJ.cation,, cee Sheet: 2. Unified Classificatien. see Sheet 3_ Hole # 2 Table A %JO aAz. 032, [)ate: 3/_].5/82 Logged by: TB From To 0 1.0 1o0 2.5 2.5 6.O 6.0 19.0 Soil Description F4, Brown sandy Silt, (PI,), with organics, (Topsoil) Fl, Brown silty sandy Gravel, (GM), sub- rounded 1" gravel, dry to damp, medium dense F4, Brown silty Sand, (SM), with a trace of 3/8" gravel, dry, medium dense F4, Brown very sandy Silt, (ML/SM), fine to medium sand, damp to wet, very stiff Bottom of Test Hole: Izost Line: Free Water Level: 19.0 Pt, 3.5 Ft. None observed° Sample Number 1 2 3 4 5 10.0 15.0 19.0 Typ'e of S amp 1 e 2n_i_f G OL G SM G ML./SM G ML/SM G ML/SM Remarks: ¢ 3. 4. 5. 6. Type of Sample, G=Grab, SPT = Standard Penetration, U := Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1. Frosl: and Textural Classification~ see Sheet 2. Unified Classification, see Sheet 3. Test Hole Table A WO #A20327 Date: 3/15/82 Logged by: TB Dephh in Peet From To 0 0.75 0.75 7.0 7.0 ]_6.5 Bottom of Test Hole: Frost Line: Free Water 1,evel: Soil Description F4, Brown organic Silt, (OL), (Topsoil) F2, Brown silty gravelly Sand, (SM), sub- rounded l" gravel, dry to damp, medium dense F4, Brown gravelly sandy Si_lt., (ML/SM), NP, suorounded 1:' to 1-1/2" gravel, damp, stiff 16.5 Ft. 3.0 Ft. None observed Sample Number I 2.5' 2 5.0' 3 10.0' 4 15.0' Type of Sample Unified G SM G ML/SM G ML/SM G ML/SM Remarks: 1. 3. 4. 5. 6. Type o~ Sample, G=Grab, SPT = Standard Penetration, U = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=High. Group refers to similar material, this study only. General Information, see Sheet 1~ Frost and Textural Ctassification~ see Sheet 2. Unified Classification, see Sheet 3. Test tlole ~4 Table A WO #A20327 Da te: 3/1. ~:. 82 Logged by: [OJ3 F r o m T o 0 1.5 1.5 7.0 7.0 15.9 Soil Description F4, Brown organic sandy SiIt, (OL), (Topsoil) F2, Brown si]_%y Sand, (SM), fine bo medium sand, damp, loose ho medium dense F4, Brown gravelly sandy Sil[., (.ML) ~ NP, damp, stiff Bob%om of Test Hole: Frost Line: Free Water Level: 15. 9 Ft. 3.0 Ft. No'~e observed. Sample Type of Number Depth Sample Unified 1 2.5' G SM 2 5.0' G SM 3 10.0' ~ ML 4 15.9 G ML Remarks: 1. 3. 4. 5. 6. Type of Sample~ G=Grab, SPT = Standard Penetra-tion, U = Undisturbed. Dry Strength~ N=None, L=Low, M=Medium, H=High. Group refers to smmi]_ar material~ this study only. General Information, see Sheet 1. Frost and Textural Classificakion, see Sheet 2. Unified ClassJ..fication, see Sheet 3. Table A WO ~A20327 Date: 3/ 1.~/[ 2 ]~,Oq(~e!d by: TB Dep'hh itl I From To 0 ]_o5 1.5 3.0 3.0 4.0, 4.0 8,,0 8.0 16.5 ~ ~om of Hole: Test Frz~s~ Line: r'/ Sample Number Depth 1 2.5' 2 5.0' · 3 t0.0' 4 16.5' F4, Brown organic sandy Silt, (OL) , F4, Brown gravelly sandy ~j:]:jh_,, (Mi,) Fl~ Bro~n silty saridy Gravel, (GM) F~, Brown gravelly sandy Silt, (ML) P4, Brown very gravelly sandy subrounded 2" gravel, damp, ]'ard ........ p o il !?pS.!j.p_tDL '-'2.P (Topsoil) (ML) , 16.5 Ft. 2.5 Ft. None observed. Type of S amp 1 e Unified G ML G ML G ML G ML hemarks: 1 o 3. 4. 5. 6. Type of Sample~ G--=Grab, SPT = Standard Penetration, g = Undisturbed. Dry Strength, N=None, L=Low, M=Medium, H=Hi9h. Group refers to similar material, this study only. General Informahion, see Sheet '~. Frost and Textural ClassifJ.cation, see Sheet 2. Unified Classification, see Sheet 3. © Te~t Holo Lo~_ - De.~criffdon Guida s'(i:'n~iT~,:.[,5'( c--h:::,:c m so!l type was observed through drill actim: direct Frost Ctassificati,)n NFS. Fl. 1:2. F3, F4, see "Soil Classificauon ~7" - ...... '1 e:au~e ,,t' Soil An engineering classification of the soils by [ article ~a_!n[~, moisture forms uortion of color less than plastic limit. sand. tThc moisture content is further defined Dy reference to LW, NP. M% or dilatent y.) an~ ui sample d.ta lsua]lf described 0~ very loose. [oose. medium Stiffness - refers tu more-m-less cohesive soils and fine grained silts of i]~Zsilt groups. Derivad (ton drill action and/or sample data. Very soft, soft. stiff, very s:~ff and hard are commonly used terms, Particle s:ze -- Thc largest particle recovered by the split spoon is 1-3/8'. Shelby tube 3", auger flights minute-man} 2". Auger flights lB-5( hollow stem ~"-8". Larger ,)aiticles axe described indirectly oy actmn of the dr~li~g and ate referred to as cobbles. 3" to 8", or boulders 8"+. Therefore when revmwmg the gradation sheets, if any, the dcscnpr.m on the hole log mus~ be considered for an'indication of larger [~rticles Unified Stol Ciasxiflcativn - This ~s a ~wo letter code, See Unified C,assltlcatloit sht'ct or turther definition. In some cases AASHO aud/or FAA suil dass~(icatimis may ue shown as well as the unified. ~tt~,~_~f~.g t,i??? - useful foz fine grained znd othe~ plastic sous PI~; nztt,xM moisture content believed to be between plastic and ~:quid L~+i hart=al mo~s~me tontent believed to be greater than li:luid dmit ~; non-plasuc, useful as a modi/ymg dcscripuon of some lilty ~{~?.~5~S~ - ~ ~h,' atdily of water t. n ~r~te ,~ the surface of a F. ock tqom -., finely g~ mxd so;I that ~s not plastic but utberwisc appears giT~;J~aF"t~ ~ ck~ye~ silt. Orgamc Content u~ually described ~ Peat. f'T, 5~ meiimes i c afi'&sv~}~Ei~i such as wood. coal, etc. as a modifier to ,m inorgamc of all mgamt - as Peal This may include tundra, muskeg and bog material. Muck - a modifier used ~o describe very soft, semi.organic deposits ~lly occuring below .~ pca~ deposn /~?~??~,ea~ - re'game particles nearly oi fully disimegrated. Fibrous Peat -- olgalllC particles more.or less intact. Bottom of'Pesthole - includes last sample interval. Frost Line - seasonal frost depth as described by drilling ~ction and/m rumples at thc t tme of drilling. Frozen Ground other than frost line, described hy samples, usually includes descripuon of ~ce content, often will include modifwd Unified Classification for frozen soils - this is a special case related to permafrost studies Free Water Level - The free water level noted during drilling. Tiffs not necessaxily the static water tahle at thc time of drilling or at other ~ea~ons Stanc water table determmatmn in othe~ than very permeable soils reqmres observation wells or piezometer inst,d]ations, used only special cases, Blo2~ -- The number of blows of ~ 140 weight free falling 30" to advance a 2" split spoon 6": the numbel o(blows for a 12" advahce by definition, the standard penetration M% - natural mois~me content of the soil sample, usually not pe--T'formed on dean sands or gravels below the water table, ~ of S~le "~]~Ts ,o 2" split spoon drwen into the soil by 140 pound weight adisturbed sample, ~5, thin wall tuhe. "Shelby" used to obtain undisturbed samples of fine grained soil. ~, "grab" disturbed sample from auger flights or wall of trench, ~, cut sample undisturbed sami: te fi'on* wall of trench. D_~y_~t__[_f~tl~ - a useful indicator of a soil's clayey fraction, N=None, I? Low, M =Medium. }.t=High (;rot~ -- The samples are placed into apparently similar gr ~ tp:; based ~;TTolor and texture and tre arb tr tr 15 assigned a gruuo '.otter. Further disturbed test~includmg ~tte~bcrg limits, grain size, moistmcden~.y group. This is an important phase ot tile soil analysis and is used to EX" UF AL CLASS[FICAT ON C,,ART GRAVEL 30 % CLAY OR / SILTy SAND GRAVEL O IO GRAVELLY SAND 20 ~50 40 50 60 70 GRAVEL (+ :k~ 4 SCREEN) % BY WEIGHT GRAVEL 80 90 I00 hOoT CLASSIFICATION SY;~ I EM NONFRO?;T SUSCEPTIBLE $OI!..S ARE INORGANIC SOILS CONTAINING tESS THAN 3% FINER TI-SAN 0.02 mm. GROUPS OF FROST-SUSCEPTiBLE SOIt_S: F! GRAVEI..LY SOILS CONTAINING BETWEEN 3 AND 20% FINER THAN 0.02 F:2 SANDY SOILS CONTAINING BETWEEN 3 AND 15% FINER THAN 0.02 mm. F3 a. GRAVELLY SOILS CONTAINING M'ORETttAN 20% FINER THANO.O2. mm. AN[) SANDY SOILS (EXCEPT FINE SILTY, SANDS) CONTAINING MORE THAN 15% FINER I'HAN 0.02 b. CI.AYS WITH PLAS'I IClTY INDEXES OF MORE THAN 12. EXCEPT VARVE[) CLAYS. F4 a. ALL SIL'I'.*; INCLt. JDIN(; SANDY SILTS. b. FINE SILTY SANDS CON YAIN~WG MOBE THAN i5% FINER '¥1-1i\N 0.02 mm. c. LEAN CLAYS WITll PLASTICITY INDEXES OF LESS TI-lAN d. VA~VED CLAW'S. ./ .0/..X, / / / j65~.44 Pa~-~) ~58.45 BAINBRIDGE S 0°04'05"E 656.75 SECI_UDED /HILLS SL/BD : qOAD ~>oxoO