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Home My WebLink AboutMARYLAND Lots 3-6 General Information MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION ENVIRONMENTAL HEALTH CASE REVIEW WORK SHEET ~ PLATTING BOARD [] PLANNING & ZONING CASE NUMBER NAME S-6371 Lots 3A, 4A, 5A, 6A Maryland Subdivision DATE RECEIVED June 3, 1982 COMMENT TO PLANNING BY July 7, 1982 FOR MEETING OF CASE OF ~(~-WATER NOT AVAILABLE TO PETITION AREA L~' PUBLIC SEWER NOT AVAILABLE TO PETITION AREA R EVl EW~'R'S CQMMENTS: I '~" t - f_f" "~ ' - ' J ; '~ - 71-014 (Rev. 2/78) 0 .52 '1.2 AC. k. .SA 000 5.~. 1:21 AC, 450 ¥. e. I. 2.-3 AC, R-O-W TO BE VACATED JUL 2 i ~982 E. 99TH July 6~ !977 Fih.~ ,~o.: 6-20 99503 Bob Subj~ ct: 'Soils ~ for Maryla~d Subdivision This Depart~:~::n~ has r-aview~d S '~,~-~ .... ' will meet ~' ~ ~ '~"- , ~ c~m~ons wi~ .-nit, this Depar~nent is concerned prior to Fi~al Approval by this De?artm~nt, Sln(~rely, John W. l.ym$ Envi foremen tat Eh!il neeri ng cc: o~ll Oo,~es 4040 "B" STREEI', ANCHORAGE, ALASKA 99503 PHONE: 907-279.2581 September 14, 1976 W.O. 9460 Grid 2439 Mrs. Mary Nettleton c/o DOWL Engineers 4040 B Street Anchorage, AK 99503 Subject: Subsurface Investigation for Suitability of On-Site Sewer - Maryland Subdivision Dear Mrs. Nettleton: Transmitted herein in accordance with your instructions are the results of the above referenced investigation as performed by us on August 28 and 29, 1976. The scope of this project is investigation for suitability of an on-site sewerage system. Included in this transmittal are: Test Hole Location Sketch Figure 1 Test Hole Log Table A Explanatory Information Sheets 1-3 Adjacent Soils Information Appendix A The exploration was conducted using a Nodwell mounted Mobile Dr~ll Model B-50 drill rig with a continuous flight solid stem auger. The rig is owned and operated by Denali Drilling' Inc. Drilling was supervised, the test holes logged and percolation test performed by Mr. Wallace Oliver, staff technician with Alaska Testlab. The test hole was placed at the approximate location shown on Figure 1. The log of this test hole is included as Table A of this report. In interpreting the log it would be helpful to utilize the explanatory information contained in Sheets 1 to 3 of this report. Mrs. Mary Nettleton September 14, 1976 Page 2 When drilling was completed a 3/4" slotted PVC pipe was inserted in the hole to aid in determining the fr~e water level. For the percolation.test, the test hole was filled with water and left overnight to saturate. On returning the next day, the hole was refilled with water and the drop in the waLer level carefully monitored over the next 60 minutes. This procedure is not a standardized percolation test, however, we understand.that the Municipality of Anchorage, Department of Health & Environmental Protection, prefers' tests performed in this manner to evaluate a site for a proposed on-site~sewera~e sytem. using the above test, the observed minimum percolation rate was 3.5 miDutes per inch. No water table was observed during drilling, but it should be noted that the free water level.normally fluctuates seasonally and with precipita~i[on. We hope this report meets your present needs. If we can be of further service, please feel fr~e to contact us. Yours very truly, ALASKA TESTLAB Melvin R. Nichols, PE Laboratory Manager MRN/mfm Attacb~nents 190.00 49~ d, 9:~ s.f. 7 56,751 ..f. 180.00 N 89° 57" 18" W 48,873 s.f. '~o' o I ':l ../", / 225,547. s.f. 5,127 Ac, O $ 89° 55' 20" Vt 50' RADIUS TEMPORARY TURN AROUND-- ); !i 550.82 Maryland Subdivision Depth in Feet From To 0.0 10.0 10.0 20.0 Bottom of Test Hole: Frost Line: Free Water Level: TABLE' A Date: August 28, 1976 Logged by: JW Oliver WOtt 9460 SOIL DESCRIPTION NFS/F-l, brown slightly Silty Sandjf. ~ravel, GM, few cobble~,-damp, subrounded particles to 2". F-l, brown Silty Sandy. Gravel, GM, dsmp. 20.0 ft. None observed None observed Test Hole Log - Description Guide ~ soil descriptions shown on the logs are the best estimate of the soil's dnaractcristics at thc time of fickl exa~nination ami as such do not achieve tile precision of a laboratory testing procedure. If thc log includes soils ~amples, ,'~se samples receive au indcpeudent textural classification iu thc Inboratory ~ ~crify the field examination. logs often include the following items: Depth lntctval- usually shown to 0.1 foot, within that zonc no s-ignifica~' change ill soil type was observed through drill action, direct observation or sampling. Frost Classification -- NFS. Fl, F2, F3, F4, see "Soil Classification Chart" Texture of Soil - /tn engineering classification of the soils by particle size and p~oportion, see "Soil Classification Chart", note tile proportions are approximate and modifications to ibc soil group due t0 stratification, inclusions and changes in properties are included. Moisture Content ~ this is a qualitative measm'e: ~, no or little apparent surface moisture, damp, moisture forms portion of color, less than plastic m t, wet, no free water, often soft, if cohesive soil. ' ' saturated, free wate~ may be squeezed out, ifa free draining soil;· ' ~ilatent at natura] moisture content, ifa non-plastic silt or fine sand. {The moisture content isfmtber defi edbyreference toPI, LW ~P.M%or diiatency.) Density - refers to more-or-less non-cohesive soils, such as sand gravel mixtures with or witbout a fine fraction, derived from drilling action and/or ~mple data; usually described as: very loose, loose, medium dense, very dense. General intent is to portray earthwork characteristics. Stiffness - refers to more-or-less cohesive soils and fine grained silts of ~silt groups. Derived from drill action and/or sample data. Very soft, soft, stiff, very stiff and ha~d are commonly ~sed terms. Particle size - The largest particle recovered by the split spoon is ~-3/8", Shelby tube 3", auger flights (miuute-man) 2", Auger flights (B-S0 hollow stem) 6"-8" Larger particles are described indh-ectly by actiou of the dr~ling and ate referred to as cobbles, 3" to 8', or boulders 8"+. Therefore when reviewing the gradation sheets, if any, the dcsctiptio9 on the hole log must be cohsidered for an mdicatiou of larger particles. Uuified Soil Classification - This is a two letter code. See Unified Classification sheet for further definition. In some cases AASIIO and/or FAA soil classificatiour may be shown as well as the unified. Attetberg Limits - useful for fine grained and other plastic soils. P~; natural moisture content believed to be less d~an plastic limit PD; natural moisture content believed to bc between plastic aud liquid ~uit~ Lx~}; natural muisture content believed to be greater than liquid limit NP; mmq~lastic, useful as a modifying description of sonu' sihy l)il,~tcucy - is thc ,ilitx of water to mig~ale to the surface of .~ ~[~m.,l~;d or nc.nly s., m.,h-d soil :; ,topic wt.'n vibrah'd m jMtcd used sill or a v.lc,mi, ash. Rock flour -- finely ground soil that is not plastic but otherwise appears ~imilar to a clayey silt. Organic Content - usually described as Peat, PT, sometimes includes ~]~crcte paiticle~ such as wood, coal, etc. as a ~nodifier to an inorganic soil· Quantity described as; trace, or 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 deposits ~y occuring below a peat deposit· Amorphus peat - organic particles nearly or fully disintegrated. Fibrous Peat - organic particles more-or-less intact. Bottom of Testhole - includes last sample interval. F*ost Line - seasonal frost depth as described by drilling action aud/or. rumples at the time of drilline. Frozen Ground -- other than frost line, described by samples, Usually .inc udes description of ice content, often will inClude modified Unified Classification for frozen soils - this is a special case related to permafrost atudics. Free Water Level - The free water level noted during drilling. This is not necessarily the static water table at the time of drilling or at other seasons. Static water table determination iu other than very permeable soils requires obserw~tion wells or piczomcter installations, uscd only in special cases. Blow/6" - The number of bloxvs of a 140 weigh/ fief falling 30" to advance a 2" split spoon 6"; the number of blows for a 12" advance is, by definition, the standard penetration. ,d% - uatural moisture content of the soil sample, usually not ~ormed on dean sands or gravels below the water table. Type of Sam~l~ - S~, refers to 2" split spoon drivcu into the soil by 1,10 pound weight, a disturbed sample, ~, thin wall tube, "Shelby" used to obtaiu undisturbed samples of fine grained soil, ~, "grab" disturbed sample from auger flights ~r wall of trench, ~, cut sample, undisturbed sample from wall of trench. Dry Strength - a useful indicator ~f a soil's clayey fraction, N=Noue, L=l.ow, M=Medium, I I=ttigh Grou~ -. The samples are placed intn apparently similar t" raps based distmbu'd tesls indudinl~ AlttqhcD~ I.imil~.grain size In s rcdensity reflect Iht' gcuOral dislluhed t-h,ml~h'rist~t:; of tbt' soils ,~s.,igncd t~* the ~,. ~ p. This is an impo~l,mt phase rd' Ibc stdl .lualysi:; and is ust'd tl~ SOIL CLASSIFICATION CHART 30% GRAVEL CLAY CLAYEY OR SI LTY CLAYEY SILTY CLAYEY SILTY CLAYEY SILTY SAND GRAVELLY SAND SANDY GRAVEL \/ GRAVEL SAND GRAVELLY SAND SANDY GRAVEL GRAVEL , \ ~10 20 30 40 50 60 70 80 90 GRAVEL (+#4 SCREEN) % BY WEIGHT 100 NONFROST SUSCEP FIBI_E SOILS ARE INORGANIC SOILS CONTAINING LESS Tt4AN 3% FINER Tt4AN 0.02 mm. GROUPS OF FROST-SUSCEP FII3LE SOILS; I::1 GRAVELLY SOILS CONTAINING BETWEEN 3 AND 20% FINER TIIAN 0.02 F2 SANDY SOILS CONIAINING BETWEEN 3 AND lb% FINER TIIAN 0.02 mm. t:3 a. GRAVELLY SOILS CONTAINING MORETliAN 20% FINER TIIAN 0.02 mm, AN[)SANOY SOILS (EXCEPI' FINE SILTY, SANDS) CONI-AINING MOIH~ THAN ! S% FINER I'I'IAN 0.02 b. CLAYS WlTII PLASTICITY INt)EX[ S OF MORL TI-lAN 12. EXCEPI' VARVEI} CLAYS. 1:4 a. ALI_. SILLS INCLUI)ING SANDY SIL'IS. b, I-INI£ SILTY SANIJ:; CONTAINING MORE TIIAN 15% FINEI;I TIIAN 0.02 C, LEAN CLAYS Wl'l II PLASTICITY INL)I:.XES OI- LESS TtlAN ] 2. d, VARVED CLAYS. APPENDIX A W.0. It7929 June 17, ].975 DOWL Engineers 4040 "B" Street Anchorage, Ali Attn: A. Lahnum Subject: Gentlemen: Nettleton Acres, Soils In response to your request fourteen testholes were placed at the requested locations for examination of the soils for on-site individual sewage treatment systems. ' The holes were placed and examined in conformance with Greater criteria. The testhole locations are shown on fig. 1. The testhole logs, on Table A. Standard exp%anatory information, on sheets 1 to 3. The GAAB published correlation of soil textural types the Unified Classification system in terms of square feet of seepage area per bedrooms is as follows: Unified Soil Class Seepage Area in Sq. ft./bedroom GW 85 GP 85 GM 225 SW 125 SP ].5O SM 250 M 275 CL 350 CH 350 ~Hole No. ~.~ / Wafer Level While Drilling Location "'~. ".-"' '.~.~:, '*' J,' Wafer Level After Drilling ' 4f ,~/'. ',~-~-~s. Frost , Hole Field Log w.o..o. Logged By ~' /_,:? Driller ,./~' Weather Standard Penetration BLOWS/6" ~'~ALA"~'~SK~~ES~LAB Test Hole Fie'id... Log /)~,z_//.~ 7~;'.~ ~.o. ~o.~-!o~ Client ', )roject Hole No. ~.ocation Water Level While Drilling Water Level A. ffer Drilling Frost '~ .~_.--"~- Drill Logged Driller Weather Standard Penetration BLOWS/6" DOWI, EngJ Akin: h. Lahnum June '17-, ].975 Page. 2 Soil with seepage rates in excess of 250 sq. ft/bedr0om are usually not allowed un].css a higher rate is determined by on-site perco].ation %est. AddJ_tionally the bottom of thc seepage pit is currently required to be 4' above the water table. Based on these criteria we suggest the fol].owing fo]: the areas descrJ, bed by the several test holes. Test Hole Depth Interval in Feet Seepage Area in Sq. Ft./Bedrooms 1 3 4 5 6 · t0 11 12 13 14 2.0- 9.0 85 9.0-~.1.0 200 1.5-12.0 85 12.0-14.0 200 1.5-14.0 85 1.5-14.0 85 2.5-12 0 85 12. 0-1~ 0 1.0-60 6.0-80 8.0-13 0 3.0-75 7.5-11.0 11.0-14. 0 25O D5 20O 200 2.5- 7.5 .................... 200 2O0 7.5-12.0 12.0-14.0 200 1.5- 4.5 85 4.5-11.0 200 11.0-14.0 250 2.0-14.0 85 1.0-14.0' ...................... 85 ...... 3.0-14.0 85 0.5-].0.0 85 10.0-14.0 - 125 85 1.0-13.0 13.0-14'. 0 125 ' The only free water ancounta]?~-d Was bO..~OW 9' in ho]:e ~6. This appeared to be the low point in tho area. _ Even ..... in that case only J. solated seeDagc was encountered. DOWL Engineer:; Attn: A. La]mum June ].7, ].975 Page 3 The soils were generally open and permeable, being sand gravel mi×tures. The exploration was accomplished with a track mounted Mobile B-50 drill fitted with solid flight auger. Samples were taken from the bit at several depths an(] cuttings from all depths were obse~zved. The soils wcrc examined by. O.M. Hatch of our staff and the classification estimated. A minimum of confir- mative tests have been performed in the laboratory. The drill and crew were provided by Denali Drilling Inc. We trust the foregoing is sufficient to your immediate needs though not necessarily exhaustive of the possibilities. Should there be questions do not hesitate to contact our of.lice. Very truly yours, HRL:cc Enclosures ltole No. 1 DePth in Feet From To 0.0' 1.0' i.0' 2.0' 2.0' 7.0' 7.0' 9.0' 9.0' 11.0' 11.0' 16.0' 9. AB].,]:, A W.O. 117929 Soil Descriphion 3"- bi{] F1 Brown ~J.?ty Sandy Grave]_, damp, 2 "- GM NFS Brown Sandy Gravel~ damp, 2 .... , GP NI"S .Brown Gravelly Sand, damp,. SP NFS/F2 Brown Silty Sand, damp, SP/SM ( ~ 10% - #200) F2 Tqn::~siity Sand with Silt layers, damp.,:: stiff, NP, SM (30% to 40% - ~200) 1F~.O' Frost Line: None Observed Free Water Level: None Observed ~ype of Sample Depth ~Sample 1 5.0' Grab 2 10.0' Grab 3 15.0' Grab llole No. 2 Depth in Feet From To 0.0' 0.5' 0.5' 1.5' 1.5' 12.0' 12.0' 16.0' TABLE A W.O. I[7929 Soil Description F4 Brown Peat damp, soft, PT F4 Brown Grave].].y Sandy Silt, damp stiff, NP, 1"-, M1 NFS Brown Sandy Gravel (more sand at 10.0' to 12.0') damp, 3"-, GP NFS/F2 Brown Sand with traces of Silt and Gravel, damp, SP/S~I Bottom of Test Hole: 16.0' ~. Frost Line: None Observed Free Water Level: None Observed Type of Sample Depth Sample 1 5.0' Grab 2 10.0' Grab 3 15.0' Grab Hole No. 3 Depth in Feet From To 0.0' 0.5' 0.5' 1.5' 1.5' 8.0' 8.0' 14.0' 14.0' 16.0' TABLE A W.O. tt7929 Soil DescrY. priori F4' Brown Peat damp soft, Pt F4 Brown ~9~.~..~andy Silt,-damp, stiff, M1 NFS Brown Sandy Grave]. damp, 3"-, NFS Brown Sand, dry, SP F2 Brown Silty Sand damp SP/SM ('~15% - ~200) Bottom of Test Hole: 16.0' Frost LJ. ne: Trace Free Water Level: None Observed GP Sample Depth Type of Sample 5.0' Grab 10.0' Grab 15.0' Grab Hole No. 4 Depth in Feet From To 0.0' 0.5' 0.5' 1.5' 1.5' 12.5' 12.5' 16.0' Bottom of Tes{ Hole: Frost Line: Trace Free Water Level: Sample ,Depth 1 5.0' 2 10.0' 3 15.0' TABLE A W.O. It7929 Soll Description F4 Bro~n Peat damp, soft, Pt Brown Silty Sa~Jdy Gravel, GM, ~25% - ~200) NFS Brown Sandy Gravel damp, 3"-, (Gravelly Sand layer at 5.0' to 6.5') damp 3"- GP NFS Brown Gravelly Sand, damp, 2"-, SW 16.0' None Observed Type of ~ampte Grab Grab -Grab Hole No. 5 Depth in Feet From To 0.0' 0.5' 0.5' 1.0' 1.0' 2.'5' 2.5' 12.0' !2.0' 16.0' TABLE A W.O. t;7929 Soil Description F4 Brown Pent, damp, soft, Pt F4 Brown ~andy Silt with a trace of Gravel, damp NP, M1 F1 Brown Silty Sandy Grave]. damp, 3"-, GM NFS Brown Sandy Gravel, damp, 3"-, GP NFS Brown Gravelly Sand, dJy, 1"-, SW Bottom of Test Hole: 16.0' Frost Line: Trace Free Water Level: None Observed '. Type of Sample pepth Sample 1 5.0' Grab 2 10.0' Grab 3 15.0' Grab .Hole No. 6 Depth in Feet From To 0.0' 0.5' 0.5' 1.0' 1.0' 6.0' 6.. 0'. 8..0' 8.'0' _].3. O' ~3.. 0' 16.. 0' TABLE A W.O. 117929 Soil D(~..~;cr ipt ion F4 Brown Peat, damp, soft, Pt F4 Brown Sandy Silt with a trace of Gravel, damp, NP, MI .NFS Brown Sandy Gravel damp, 2"-, GP 'F2 iBrown Silty Gravelly Sand, damp, 3F2/F4 Brown Si].ty Sand to Sandy Silt, .~amp to saturated, NP, F2/M1 ~4 _Tan Sandy Silt damp, NP, M1 (Wate~.-.from .seepage between 9.0' and ~3..0'.,~>during drilling, hole reopened, .~tabilized at 10.0' on the third day) ~ottom of Test Hole: !~rost Line: !Fmace ]~ree Water [Level: .9.0' to 13.0' '~2ype of Sample Depth Sample 1 5.0 ' Grab 2 10.0 ' Grab 3 15.0 ' Grab llole No. 7 Depth in Feet From To 0.0' 0.5' 0.5' 3.0' 3.0' 7.'5' 7.5' 11.0' 11.0' 16.0' ].ABLZ, A W.O. t~7929 Soil Description F4 Brown Peat damp, sofh, Pt F4 Brown Sandy Silt damp, NP, M1 NFS Brown G[-ave].].y Sand damp, i1"-, SP F2 Brown Si].ty Sand damp SP/SM (~ 10% to 15% - #200) F! Brown Silty Sandy Gravel damp, 3"- GP/GM (~3 10% - ~i200) Bottom of Test Hole: 16.0' Frost Line: Trace Free ~"~ Le~'e!~' _None Observed Type of · Sample pepth Sample 1 5.0' Grab 2 10.0' Grab 3 15.0' Grab llo].o No. 8 Depth in Feet From To 0,0' 0.5' 0.5' 1.0' 1.0' 2.5' 2.5' 4.5' '4.5' 7.5' 7.5' 12.0' 12.0' 16.0' TABLE A W.O. #7929 Soil Description F4 Brown ]?eat dalup Pt F4 Brown Gravelly Sandy Silt damp NP Mi F2 Brown Gravel].y Silty Sand, damp, 1"- SM NFS/F2 Brown Silty Sand damp, SP/SM (~10% - t~200) 'NFS/F2 Brown Silty Gravel Sand, damp, 2"-, SP/SM (~10%- ~i200) F2 Brown Silty Gravelly Sand, .damp, 3"- SM ( ~ 24% - #200) · F2 Brown Silty Sand, damp SM (' 30% to 40% - ~7200) , Bottom o'f Test Hole: 16.0' Frost Line: Trace Free Water Level: None Observed Type of Sample Depth Sample 5.0' Grab 10.0' Grab 15.0' Grab Hole No. 9 Depth in Feet From To 0.0' 0.5' 0.5' 1.5' 1.5' 4.5' 4.5' 11.0' 11.0' 16.0' Bottom of Test Hole: Frost Line: Trace Free Water Level: Sample Depth TABLE A W.O. I{7929 Soil l)escrip~j, on F4' Brown Peat damp PT F4 Brown Gravelly Sand), Silt 'damp, 2"-, M1 NFS Brov~n Sandy (]ravel wi_Ch trace of Silt, damp 3"-, GP F2 Brown Silty Sand trace of Gravel, damp, SM (~20% - ~200 @ 5.0', ~10% to 15% - ~200 @ 10.0') F2 Brown Silty Gravelly Sand, damp, 2"- SM, (~,15% to 20% --#200) 16.0' NOne Observed Type of Sample 1 5.0' Grab 2 10.0' Grab 3 15.0' Grab ]]ole No. 10 Depth in Fee~ ~['0 0.0' 0.5' 0.5' 1.0' 1.0' 2.0' 2.0' 16.0' Bottom of Test Hole: Frosh Line: Trace Free Water Level: Sample Depth TABLE A W.O. It7929 Soil Description F4 Brown Peat damp, PT F4 Brown Sandy Silt damp, NP, MI F1 Brown Silty Sandy Grave]_, damp, 2"-, GM NFS Brown Sandy Gravel with a trace of silt, damp, 3"-, GP 16.0' None Observed Type of Sample 1 5.0' Grab 2 10.0' Grab 3 15.0' Grab l]ole No. 11 Depth in Feet From To 0.0' 0.5' 0.5' 1.0' 1.0' ]_6.0' TABLE A W.O. 4t 7929 Soil Description F4 Brown Peat damp, PT F4 Brown Sandy Silt, damp, NP, Mi NFS Brown Sandy Grave]., with a trace of Silt, damp, 3"-, GP Bottom of Test Hole: 16.0' Frost Line: None Observed Free Water Level: None Observed Type of Sample Depth Sample 1 5.0' Grab 2 10.0~ Grab 3 15.0' Grab 11o.'[~ No. '12 Depth in t?eotz From To 0.0' 0.5' 0.5' 1.5' 1.5' 3.0' 3.0' 16.0' TABLE A W.O. t17929 Soil Description F4 Browff PeEt damp, PT F4 Brown Gravelly Sandy'Silt, da]np, NP,M1 F1 Brown Silty Sandy Gravel, damp., 2"-, GM NFS/F1 Brown to Grey Sandy Gravel with a trace of Silt, and a few cobbles, damp, 6"- ~P/GM (less than 10% - ~200 3.0' to 6.0' and 13.0' to 16.0', ~10% - ~t2oo @.lo.o') Bottom of Test Hole:' 16.0' Frost Line: Trace Free Water Level: None Observed Type'of Sample Depth Sample .1 5.0' Grab 2 10.0' 'Grab 3 15.0' Grab llo].e No. '1.3 Depth in Feet Frora To 0.0' 0.5' 0.5' 10.0' 10.0' 16.0' TABLE A W.O. ~t7929 Soil. DescrJ.ption F4 Brown Gravelly Sandy Silt, damp, Mi NFS Brown Sandy Gravel (trace of Silt below 7.0') damp, 3"-,' GP 'NFS/F1 Brown to Grey Silty Sandy Gravel, damp, 3"-, GP/GM (N10% - ~200) Bottom of Test Hole: 16.0' Frosf- Line: None Observed Free Water Level: None Observed Type of Sa? e 1 S.O' Grab 2 " 10.0' Grab 3 15.0' Grab Hole No. 14 Depth in Feet From To 0.0' 0.5' 0.5' !.0' 1.0' 13.0' 13.0' 16.0' TABLE A W.O. #7929 Soil Description F4' Brow]] Peat damp, PT F4 Brown Gravelly Sandy Silt,' damp, SM NFS Brown Sandy Gravel (Sandier 1.0' to 3.0') damp, 2"-, GP NFS/F2 Brown Sand with a trace of Silt, dry, SP/SM Bottom of Test' Hole: 16.0' Frost Line: Trace ' Free Water Level: None Observed Typc of Sample Dept~ Sample 1 5.0' Grab 2 10.0' Grab 3 15.0' Grab February 26, 1976 W.O. #17612 · Grid #2439 Metropolitan Co~nunity Church P.O. Box 3-091 Anchorage, AK 99501 Attention: Subject: Mr. Bill Byrne Subsurface Investication on Lots 1, 2, 3, 4 DeSpirito Subdivision Dear Mr. Byrne: We performed a subsurface investighti0n on Lots'l,' 2, 3, and 4 of DeSpirito Subdivision on February 21, 22, 25 and 26, 1976. · ],e exD!oration co:]g~st~d of one 20 ~ont and four lq fo.~z test boles placed witb a B-50 ~4obile drill rig mounted on a Flextrac-Nodwell tracked vehicle and utilizing a continuous~ solid flight auger. The drill rig was owned and operated by Denali DrillJ.ng, Inc. The drilling was supervised and the test holes logged by Mr. Wallace Oliver, staff technician with Alaska Testlab. Following this report' are: Vicinity Map Test Hole Location Sketch Grain Size Distribution Curves Standard Explanatory Information Figure 1 Figure 2 Sheets 1-5 Sheets 6-8 Grab samples were taken off the auger flights in five foot intervals in test holes 1 through 4 and two and one-half foot intervals in test hole 5. Samples were visually classified in the laboratory with samples of similar color, texture and grain size distribu- tion being grouped toocther and laboratory analysis being performed on the group as a who:Lo. ~?i ,t.ve groups were identified: Group A is a ~.[!m!.)[ ?'~:t_v_.t]:l:. that J.:: nou--frost ;suscel.d:ib].e and ii:t; g.t:,~dat':ion :i.s shown on s]~(~(~t oho. Metrol.~olJ. tan Community Church February 26, 1976 Page 2 Group B Group C Group D is 'a silty_ ~_ravelly sa]][]' that J_s moderately frost susceptSble being rated ]?-2. Its unified classifi- cation is SM and its gradation is on sheet two. is a Ej.~t__y_ q9.n_d~z ~ravel that is moderat.ely frost susceptible being rated.F-1. Its unified classi- · fication is GM and its g½adation is on sheet three. Group E is a silty sand that is moderately frost, susceptible being rated F-2. Its unified classification is sM and its gradation is on sheet four. is a sand~ silt that is highly frost susceptible being rated F-4. Its unified classification is ML and its gradation is on sheet five. It is ~on- plastic. Water was placed in test holes one ·through four, left to saturate overnight, refilled in the morning and the drop 'mn the water level monitored. (Each hole was cased ·with 3/4 inch, slotted PVC pipe). The rate the water level dropped' over the period of an hour was: Test Hole #1 3.5 minutes/inch Test Hole ~2 '4.0 minutes/inch Test Hole #3 8.5 minutes/inch Test Hole #4 5.5 minutes/inch. Test Hole =5 was pi. ac.ed in the right-0fLway fo]? the planned extension of Nain Tree Drive. We hope this is sufficient ho your present needs. Please do not hesitate to contact us if we can clarify any item. very sincerel.y, ALASKA TESTLAB_ Me]x.~n R. Nichol3, (_.E. Laboratory Supervisor IqRN: rb ,d:-. 0££ ~Z~Z 'OC~: ~/A~ ~f~ ~OoOON . Test: Hole I[1~ ~Depth in Feet From To 0.0' - 1.0' 1.0' - 10.0' 10.0' - 20-0~ Bottom of Test Hole: Frost Line: Free Water Level: Samtole I 5.0' 2 10.0' 3 15.0' 4 20.0' Remarks: 1. 2. 3. 4. 5. Table A we ti 17612 ~' ' 1976 Iebruary 21, Logged By: JWO Soil Descripkion F-4, brown o?_:cjanic overburden. NFS, brown Sandy_ Graw-~]., GP, damp, maxlmum subrounded l)articles to '2", Group A. F-2, brown Silty Gravelly Sand, SM, d'amp, maximum subrounJed panicles to 2", Group B. 2.5' None Observed Type of Sample G~oup .D A ~ B G B~ G B Unified GP SM SM .SM Type of Sample, G=Grab, SP = Standard Penetration. Group refers to similar ma[:.erial, this study only. General I]~.formation, see Sheet 1. Frost and Textural ClassJ. fication, see Sheet 2-3. unified Classification, see Sheet 4. Test llo].c tl2 · Table A WO II17612 February 21, 1976 Logged By: JWO pepth in Feet From To 0.0"- 1.0' 1.0' - 5.0' 5.0' - 10.0' 10.0' - 15.0' Soil Description F-4, brown O_r._g~anic Overburden. F-l, brown S~lSy Sandy Gravel, GM, damp, Group C. NFS, brown S__a,ndy ~rDve~l, GP, damp, maximum subrounded particles, 2", Group A. F-2, brown Silty Sand, SM, damp, Group D. Bottom of Test Hole: 'Frost Line: Free Water Level: Sample D~pLh 15.0' 2.5' None Observed Type of 5.0' G C GM 10.0% G A GP 15.0' G D GM Remarks: 2. 3. 4. 5. Type of Sample, G=Grab, SP = Sqandard Penetr~tJ.on. Group refers to similar material, this study on].y. General Informal:ion, see Sheet 1. ~ro~.t and Textural Classification, see Shee~ 2-3. Unified Classification, see Sheet 4. Test Hole. Dgpth in Feet: From To 0.0' - 1.0' 1.0' - 5.0' 5.0' - 15.0" Table A WO II 17612 February 21, 1976 Logged By: JWO Soil Description F-4, brown Organic Overburden." F-l, brown Silty Sandy Gravel, GM, damp, maximum subrounded particle, size 2", Group C. F-2; brown Silty Sand, SM, damp, Group D. Bottom of Test Hole: Frost Line: Free Water Level: Sample Depth 5.0' 10.0' 15.0' J5.0' 2.0' None Observed Type of .i~' ~ample' ':'~ G G G Group Unified C GM D SM D · SM Remarks: 2. 3. 4. 5. Type of Sample, G=Grab, SP = Standard Penetration. Group refers bo sJ.milar material, this study only. Genera.]. Information, see Sheet 1. Frost and .Textural Classification, see Sheet 2-3. Unified Classification, see Sheet 4. Test ltole ti4 ?ep%h in F~et From To 0.0'. - 1.0' 1,0' - 5.0' 5.0' - 15.0" Table A WO I[17612 February 21, 1976 Logged By: JWO Soil DoscriptJon F-4, brown 9r~pic 9verburdg~. F-4, brown ~9~Y. ~, MI,, with trace, of gravel, damp, NP, Group E. F-2, brown ~ilt~ ~ravell~ Sand, SM, damp, Group D. Bottom of Test Hole: Frost Line: · Free Water Level: 15.0' 2.0' l~one Observed .~ampl~ 1 2 3 Remarks: Type of Depth Sample Group 5.0' G E i,~i, 10.0' G B SM ~5.0' G B SM unified 1. Type of Sample, G=Grab, SP = Stan~ar penetration 2. Group refers to simi].ar material, this study only. 3. General Info~-mation, see Sheet 1. see Sheet. 2-3. 4. ~ro._.t and Tex-tural Classification, 5. unified Classification, see Sheet 4. Ho.lc l} 5 Table A we t~ 17612 F<:bruary 21, 1976 Logged Dy: JWO Depth in Feet .From To 0.0' - 1.0' · 1.0'-- 5.0' 5.0' - 15.0' Soil Description F-d, brown Orqanic Overburden. F-2, brown S]l'[:y Gravelly Sand, SM, damp, Group B. F-4, brown Sandy Silt, ML, damp, NP, Group E. Bottom of Test Hole: Frost Line: Free Water Level: 15.0' 2.5' Nonq Observed Sample .Depth 2.5' 5.0' 7.5' 10.0' 12.5' 15.0' Type of Sample Group Unified G B SM G E ~'~L G E ML G E ML G E ML G E ML Remarks: 2. 3. 4. 5. Type of Saraple, G=Grab, SP = Standard Penetration. Group refers to similar materJ_al, this study only. General Information, see Sheet 1. Frost and Textural Classification, see Sheet 2-3. UnifJed Classification, see Sheet 4. °~I1TiT o,I ~o o o ~o ~o p., ,-., ',,,C tL ~o ~o o ~o o ~ i~z o -t MAIN TREE DRIVE MAIN TREE DRIVE 381.T7 i92.09 'HOMESTEAD 4.~4.s~ TRAIL g~'O 1,001.1.(] (.% BASIS OF BEARING o~ [9 S.00°03 17 E.(R) / /