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Home My WebLink AboutGROLL #1 Block 1 Lots 2 & 3 Tract A S-5681 ,, ~ MUNICIPALITY OF ANCHORAGE DEPARTMENT OF FIEALTH & ENVIRONMENTAL PROTECTION FNVIRONMENTAL HEALTH CASE REVIEW WORK SHEET L~ PLATTING BOARD [~] PLANNING & ZONING CASE NUMBER NAME S-5681 Lots 2, 3 Block 1, Tract A Groll Subdivision #1 DATE RECEIVED April 29, 1981 COMMENT TO PLANNING BY May 14, 1981 FOR MEETING OF CASE OF -L~'~P~BLIC WATER NOT AVAILABLE TO PETITION AREA ~2,~E~BLIC SEWER NOT_,,,AVAILABLE~ TO PETITION AREA REVIEWER'S COMMENTS: 71-014 (Rev. 2/78) TO ALASKA I. AND DEVELOPMENT SI:RVICE5, ,NC. 4546 Business Park Blvd. ANCHORAGE, ALASKA 99503 (907) 279.7451 Municipality of Anchorage Dept. of Health & Environmental Conservation _815_L_$treet Anchorage, AK 99501 Mr. John Lynn Groll Subdivision SE~, NWL, Sec 23~ WE ARE SENDING YOU ~ Attached [] Under separate cover via [] Shop drawings [] Prints [] Plans [] Copy of letter [] Change order [] OPIES DATE NO, 1 Soil Log - Percolation Te~ 1 Soil Log - Percolation Tea -- the following items: [] Samples [] Specifications ~ts Dated December 9, 1981 DESCRIPTION Dated August 1.4, 1982 THESE ARE TRANSM TTED as checked below: ~ For approval ~.Ap~roved as submitteF~ [] Resubmit __co?)e~.f2r approval [] For your use ./.--"'~] Approved as noted [] Subtile_ .~//:c~'~l'pies for ~,~bution ~ As requested ~ Returned for corrections ~-- ~ Retu~corrected prints~ ~ For review and comment ~ . ~ FOR BIDS DUE~,' , { ', ~,'"9~__ ~ PRINTS?RETURNED~A~R' LOAN TO US / ~"q ,~/ ~ -~:' : I ~ ',A.~/ " ',. ~ ," .: ...~5 ' V_.~:g,: :~~ ' Sincerely, _S~:)~ ~ ~ ~ ~ASKA LAND DEVELOPMENT SERVICES, INC Bob Lecklider COPY TO. SIGNED:. If enclosures are .or as noted, I{i~dly ~ot~fy ~s at once. Alaska Tesdab 4040 "B" Street Anchorage, Alaska 99503 December W.O. Phone (907) 278-1551 9, 1981 #A20258 ( Telecopier (907) 272-5742 ) Alaska Land Development Services 4546 Business Park Blvd. Anchorage, Alaska 99503 Attention: Mr. Tucker ~_~%4./.~/~~:_ Subject: Groll Subdivision, Lots 2 and 3 Block 1, Percolation Tests £\ Dear Mr. Tucker: ./ Test holes were drilled on the subject lots touu 3~ -~e/te~mine subsoil conditions and to determine suitabilifl~ for~°n-*site sewage disposal. The test holes were drill~ on November 27, 1981, using a Nodwell mounted MObile ~61 drill fitted with a solid flight auger. The drill rig is owned and operated by Denali Drilling, Inc. The/~st holes were logged by Denali Drilling personnel; /~ples were obtained at five foot intervals in each test/hole and were sealed in plastic bags and forwarded to Ala~a Testlab for identifi- cation. / On November 30, 1981, both te~ holes were checked by Mr. David Paul of Alaska Testlab/ The test hole on lot 3, Block ~, (Te~t hole ~2~ w~s fzlle~ wz=n groundwat.= an= a perco- lation tes~ could not be p~rformed. It is recommened that further subsurface investigation be performed on this lot, due to the subsurface groundwater conditions. A percolation test was ~erformed on Lot 2, B!oc~ 3] (Test Hole ~1) by~~ t~6" diameter test hole w~water an~ allowzng it -~o saturate ~or 24 hours. The tollow~n~ day, /~ the hole was re~zlled with water, and the evaluation o~ .~water in the hole was measured in !0 mlnute ~.ntervals for ~a ~ ]/~O~% hour period. The minimum observed perco.~ation rate wa% k~JEou have an~ questions regardkn9 th~s ~nvesgigaE~o~ff/~,/ please do not heszta'te to contact us. ~-~'.' ~ %?' ',~ b&ASKA TESTLAB MRN/kf Melvin R. Nichols, P.E. Manager ! I I '/, , I ' I /'/ Test Hole Table A Date: 11-30-81 Logged by: Denali Drilling W.O.: #A20258 Depth in Feet From To .... 0.0' - 6" 6" - 8o0' 8.0'.- 15.0' Bottom of Test Hole: Frost Depth: Free Water Level: Remarks: Soil Description Peat. Brown Silty Sandy Gravel, moist, F-l, GM. Brown Silty Gravelly Sand, moist-damp, F-2, SM. 15.0' 3-4" None Observed No H20 in hole after drilling. Type of Sample Depth Sample Unified 1 5 · 0 ' G GM 2 10 · 0' G SM 3 15 . 0 ' G SM Remark s: 1. Type of Sample, G = Grab, SPT = Standard Penetranion, U = undisturbed. 2. Dry Strength, N = None, L = Low, M = Medium, H = High. 3. Group refers to similar material, this study only. 4. General Information, see Sheet 1. 5. Frost ~nd Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole ~2 Table B Date: 11-30-81 Logged by: Denali Drilling W.O.: ~A20258 Depth in Feet From To 0.0' - 6" 6" - 11.0' 11.0' - 15.0' Soil Description Peat. Brown Silty Sand with some gravel, F-2/F-4 SM, damp to wet. Brown Silty Gravelly Sand, wet, F-4, SM. Bottom of Test Hole: Frost Depth: Free Water Level: Remarks: 15.0' 3" None Observed No water at time of drilling. Type of Sample Depth Sample Unified 1 5.0' G SM 2 10.0' G SM 3 15.0' G SM Remarks: 1. Type of Sample, G = Grab, SPT = Standard Penetration, U = Undisturbed. 2. Dry Strength, N = None, L = Low, M = Medium, H = High. 3. Group refers to similar~material, this study only. 4. General Information, see Sheet 1. 5. Frost and Textural Classification, see Sheet 2. 6. Unified Classification, see Sheet 3. Test Hole Log - Description Guide The soil descriptions ,,b.wn .n the logs are the best estimate of the soil'l to verify the lield examination. The logs often include the t.llowmg items: Depth Interval usually shown to 0.1 foot, within that zone no significant change m s,nl typc was observed through drill action, d~rect observati,Jt ?~.s~t p~.g Frost Classificatibn' - NPS, Fl, F2, F3, F4, see "Soil Classification Chart" Texture ,~1 Sod ^n engineering classification of the soils by particle size and proportion, see "S,)l[ Classification Chart", note tile proportions are approximate and rn.dil'ications to the soil group due to dr~ , -,~ or tittie apparent Mlrfacc moisture, damp. mm.tore forms pornon of color. {ess than plastic limit, sl.,.,..<~.,- r-~ f'rec waler :a.v. be squeezed out. ifa free draining sod; sand. 4Th,: moisture ,:ontent is ~urther definedbv reference to PI, LW. N l'.Mq, or dilatency., and/or sarnplc d.~ta: usuall5 dcscribcdas: very loose, loose, mcdmm Stillness rotors io more-or4css collcsive ·.oils and fine grained silts ol t~T clay-silt groups. Derived fro!n drill action and/or sample data. Very soft, soft. stiff vet) still'and hard are commonly used terms. Particle s~zc The largest particle recovered by the split spoon is 1-3/8", Shelb5 tube 3", auger l:ights (minute-m~m) 2", Auger flights lB-50 hollow stcml 0"-8", Larger particles ,ire described indh'ecdy by action o~' thc d:iHing and arc referred to as cobbles, 3" to 8", or boulders $"*. There(ore when rcmcwmg the gradation sheets, if any, the descripnun .n the hole log must be considered for an indication of larger p~rticles. Unified Sod Cl.~ssification -- This is a two letter code. See Unified ~tqcatian shcct i~,r ['u~r-ther dc{inition. In same cases AASHO and/or FAA soil classtticalions may be slmwn 4s well as the unified. Atterbcrg Llmus useful for fmc grained and other plastic soils. PI+; ndttlza! nlol~tUlt' t~Oll[ellt bel:eved to be be:ween plastic and liquid ~nits L~w+; natural moisture content believed to be greater than liqmd limit NP; nou-pl,tslic, useful as a mat~ri~ls. nlodifying description of some :,dry Ddatencv - t~ the ability of water :o migrate ~o the ~urfa:x' of a ~aturated or nearly saturated ~od Sarllp[e when vibrated orjo'ted used as ~,n .~id to detetlmne t(' a fine grMned *oil is ~ slightly or non.plastic s~t or a volcanic ash. Rock flour - finely ground soil that is not plastic but other,.viseappears similar to a clayey silt. Organic Content - usually described as Peat, PT, so,netimes includes discrete particles such as wood, coal, etc. as a ~nodifier to .m inorgamc soil. Quantity described as; trace, or an estimate of volume, or, in c~Se of all organic, - as Peat. This may include tundra, muskeg and bog material. Muck - a modifier used t() describe very soft. semi-organic flcposlts us~ua yoccuringbelowa peat deposit. A~morphus peat - organic particles nearly or fully disintegrated. Fibrous Feat - organic particles more-or less intact. Bottom of Tcsthole mc]tides last sample interval. Frost Line - seasonal frostdeptb asdescnbed bvdriiiingactiona.d/or samples at the time of dril!ing. Classification for ftc. zen soils - this ~s a special c~se related to Free Watcr Level - Thc free water level noted duri:,g d~iili~.. This ~:, not necessarily thc static water table ,it thc tinlc o[ drilling or at other seasons. Static water table determinntlOn !n other than very perlneab[e soils requires observation wells or pie?omelet installations, used only m special cases. Blow/6" - The number of blows ufa 140 weight free falling 30" to advance a 2" split spoon 6";the nmnber of blows for a 12" advance is. by definition, the standard penetration. natural moisture content of the soil sample, usually ~:~-formed on ch'~n s~,ds or graven below the water table. TypeofSample - SP, refers to 2" split spoon driven into the sod by 140 pound weight, a disturbed sample, ~S, thin wall tube, "Shelby" used to obtain undisturbed samples of fine grained soil, G,"grab" dilturbed sample from au,lee flightserwaiioftrench. g., cut sampk, undisturbed sample from wall of trench. Dry Sir_on,th - a useful and=cater of a sml's clayey fraction, N~None, L=Low, M=Medium, H=Higb Gro_u.f~ - Tile samples are placed int. apparently sim Jar g~uups based on color and texturc and are arbitrarily assigned a grm~p '.citer Further disturbed tests including Ancrbcrg Limits. gram site, moistun' density TEXTURAL SOIL CLASSIFICATION CHART GRAVEL 50 % CLAY CLAYE S Cg~AYEY O I0 SAND \ : :::i: SiLT Y Sl LT Y . i 6RAYEL 6 SAND;: GRAVEL / \ GRAVELLY SAND GRAVEL 20 50 40 50 60 70 80 90 IOO GRAVEL (+ ~ 4 SCREEN) % BY WFIGPIT FROST CLASSIFICATION SYSTEM NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LESS THAN 3% FINER THAN 0.02,nm. GROUPS OF FROST-SUSCEPTIBLE SOILS: GRAVELLY SOILS CONTAINING BETWEEN 3AND 20% FINER THAN 0.02 mm. F2 SANDY SOILS CONTAINING BETWEEN 3 AND 15% FINER THAN 0.02 rnm. F3 a. GRAVELLY SOILS CONTAINING MORE THAN 20% FINER THAN 0.02 mm. AND SANDY SOILS (EXCEPT FINE SILTY, SANDS) CONTAINING MORE THAN 15% FINER THAN 0.02 mm. b. CLAYS WITH PLASTICITY INDEXES OF MORE THAN 12.. EXCEPT VARVED CLAYS. F4 a. ALL SILTS INCLUDING SANDY SILTS. b. FINE$1LYY SANDS CONTAINING MORETtlAN 15% FINER THAN 0.02 mm. ¢. LEAN CLAYS W;TI4 PI. ASTICITY I,"IDEXES OF LESS THAN 12. d. VARVED (:.LAYS.