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Home My WebLink AboutLot 01 C~ 3qlA lq ~ c~ Nfl / 0 ~,,oo o~o~oo N L~ 7 I~UNICIPALIT¥ OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION ~0 C STREET, ANCHORAGE, ALASKA 9950~ 274-45G1 WELL ~:.l~4[) Or-I--SITE SEWER PERMIT PERMIT NO. ( JUDY MORRISO~ ~0~? WEST ~OTH Eb~TION SUMMER DR OFF LK OTIS PKY LEGAL L1 BLK2 BIRCH FORREST ESTATES LOT SIZE 49000 SQFT TYPE OF SOIL ABSORPTION SYSTEM...TRENCH NUMBER OF BEDROOMS 3 SOIL RATING, SQFT/BR ii0 THE REQUIRED SIZE ~FIHE SOIL ABSORPTION SYSTEM IS'DEPTH= 14.5 LENGTH= 19.4i176470588 THE MINIMUM DEPTH OF GRAVEL BETWEEN THE OUTFALL PIPE AND THE EXCAVATION BOTTOM IS 8.5 FT THERE IS NO SET WIDTH FOR TRENCHES. FOR DRAINFIELDS, THE WIDTH IS 3 FT. THE DEPTH OF TRENCH OR PIT IS THE DISTANCE BETWEEN THE GROUND SURFACE AND THE 80TTOM OF THE EXCAVATION. THE LENGTH DIMENSION IS THE LENGTH OF EACH SIDE FOR A SEEPAGE PIT OR THE LENGTH OF THE TRENCH, OR DRAINFIELD. THE REQUIRED SEPTIC TANK SIZE IS i000 GALLONS BACKFILLING OF ANY SYSTEM WITHOUT FINAL INSPECTION BY THIS DEPARTMENT WILL 8E SUBJECT TO PROSECUTION. MINIMUM DISTANCE FROM WELL TO ANY SEPTIC TANK/PACKAGE PLANT OR SOIL ABSORPTION SYSTEM IS i00 FT FOR A PRIVATE WELL RND 200 FT FOR A PUBLIC WELL. WELL LOGS MUST BE RETURNED TO THE DEPARTMENT WITHIN 30 DAYS OF THE WELL COMPLETION. SPECIFICATIONS AND CONSTRUCTION DIAGRAMS ARE AVAILABLE TO INSURE PROPER INSTALLATION. I CERTIFY THAT I AM FAMILIAR WITH THE REQUIREMENTS FOR ON-SITE SEWERS AND WELLS AS SET FORTH BY THE MUNICIPALITY OF ANCHORAGE AND WILL INSTALL IN ACCORDANCE WITH THE CODE. ANCHORAGE ALASKA 99503 October 2, 1975 W.O. ~8693 Ms. Judy Morrison c/o DOWL Engineers 4040 "B" Street Anchorage, Alaska 99503 ATTENTION: Mr. Tom Garrod RE: Subsurface Investigation for Suitability of On-site Sewer, Lot 1, Block 2, Birch Forrest Estates Dear Ms. Morrison: On Wednesday, September 29, 1975, we placed a test hole on the above referenced lot to a depth of 17.5 feet. The approximate location of the 'test hole is sketched on the enclosed Figure 1. The log of that 'test hole is included as Table A of this report. (It may be helpful to read 'the Standard Explanatory Information at the back of this report to interpret the data). The drilling was conducted with a Mobile Drill B-50 drill rig mounted on a Flextrack-Nodwell tracked vehicle owned and operated by Denali Drilling, Inc. The drilling was supervised and the test hole logged by Mr. Pete Herstek, staff techincian with Alaska Testlab. After the testhole was drilled, it was filled with water and left to stand over night and saturate. Mr. Herstek returned at 9:00 AM the next morning, refilled the hole, and measured the drop in the water level over the next hour. The water level fell 18" in one hour, for a percolation rate of 3.3 minutes per inch.~ Utilizing the data published in Table A, "Absorption Area Require- ments For Individual Residences" on page 8, of the "Manual of Septic Tank Practice" published by the U.S. Department of Health, Education & Welfare the required absorption area, per bedroom, for a seepage pit placed in the material represented by the test hole is 110 square feet. A water table was not detected during the exploration. It should be noted though, that water tables will fluctuate with seasonal and climatic changes. 'Ms. Judy Morrison Page 2 October 2, 1975 If we can be of further service or'offer clarificatJ.on to any of the data presented, please do not hesitate to contact the writer. Very sincerely yours, ALASKA TESTLAB Melvin R. Nichols, C.E. Laboratory Supervisor M R N / v m ~ Enclosure ¥-~_S'-F HOLE. LOdATIO/',-\ ~S~<~-l"(] Pi · SE I/4- NE I/4 I I Lot 1, Block 2 Depth.in Feet From 0.0' To 3.0' 3.0' 6.5' 6.5' 12.0' 12.0' 16.0' 16.0' 17.5' Bottom of Test Hole: Frost Line: Free Water Level.: TABLE A W.O. ~8693 Soil Description F-4, brown, organic san_d~2 silt, OL, wet, medium density, damp F-2, brown, gravelly sil~y£ Sand, SM, damp, m e d i um--~.~'~'J[~.'~ F-2, brown to olive, silt~ gravel~. sand, SM, damp, mediu[n--~[~s'~ F-l, brown to olive, sil]~_~ sandy gravel, GM, damp; medzum to hzgh density F-2, brown to olive, gravelly sand, SM, damp~ high density 17.5' None Observed None Observed Test Hole Lo9 -- Description GuMe Thc soil descriptions shown on thc logs arc thc best estimate of the soil's characteiistics at the time of field examination and as such do not achieve the precision of a laboratory testiug procedure. If the log includes soils samples, those samples rccciw, an iudependcnt textural classification in the laboratory to verify the field examination. The lugs often include the following items: Depth Interval usually shown to' 0.1 foot, witbiu that zooe no siguificant cbauge m soil type was ohserved through drill action, direct observation or sampliug. Frost Classification -- NFS, Fi, F2, F3, F4, see "Soil Classification Chart" Texture of S(dt - An engiueering classificatiou of the soils by particle ~ize and proportion, see "Soil Classification Chart", uote the propm'tious are approximate and modifications to the soil group due to stratification, inclusions and changes in properties are iucludcd. Moisture Content - this is a qualitative measure: ..... ~ n~j"~Tlittle apparent surface moisture, damp, moisture forms portion of color, less than plastic limit, wet, no free water, often soft, if cohesive soil, saturated, free water may be squeezed out, if a free draiuing soil; ~-i'F~7*t natural moisture content, if a nonq)lastic silt or flue sand. (Tbe moisture content is further definedby reference Io PI, LW, NP, M% or dilatency.) Densit3 .... refers to more-or-less non-cohesive soils, such as sand gravel mixt4[~s ~vitb or without a flue fraction, derived from drilling action and/or sample data; usually described as: very loose, loose, medium dense, very dense. General intent is to portray earthwork characteristics. Stiffness - refers to morc-ordess cohesive soils and fiuegrained siltsof the clay-silt groups. Derived from drill action and/or sample data. Very soft, soft, stiff, very stiff aud hard are commonly used terms. Particle size -- The largest particle ~ecovered by the split spoon is ~-3/8", Shelby tube Y', auger flights (minute-man) 2", Auger flights CB-50 hollow stem) 6"-8". Larger particles are described iudirectly by action of the drilling and are referred to as cobbles, 3" to 8", or boulders 8"-I. Therefore when reviewing the gradation sheets, if auy, the description on the hole log must be considered for an indication of larger part icles. Unified Soil Classifica.~iou ~ This is a two letter code. Sec Unified ~jf;~Fcii~i~f'23~JJ[TOFT{iaher dcfinitiou. In sumc cases AASI40 and/or FAA soil classifications may bc shuwn as wcli as the unified. Atterberg Limits .- useful for fine grained and other plastic soils. PI; natural muistm'e content believed to be less than plastic limit Pl+; natural moisture content believed to be between plastic and liquid ~nits Lw+; 'natural moisture content believed tu be greatei than liquid limit NP; non-plastic, useful as il modifying description uf sumc silty i'{{~it erials. ?_(l~2j.t,)_}.t/y is the ability of watt'r tt) migrate to the surface of a SiltUrilled or llearly saturatt'd soil sample when vibrated ~' jo]led · used as au aid lo determine if a fine r, rai'wd s(fil is a slil,,btly ur m)u.plastir silt m' a vulcanic ash, Rock flu't~r- finely ground soil tb'at is not plastic but otherwise appears ~lTf/J ii clayey silt. Organic Content usually described as Peat, PT, sometimes includes ~ ps]~ such as wuod, coal, etc. as a modifier to an inorganic soil. Quantity described as; trace, or an estimate of volume, or, in case. of all orgauic, -- as Peat. This may iuclude tuudra, muskeg and bog material. Muck -- a ~nodificr used to describe very soft, semi-organic deposits occuring below a peat deposit. Amorphus peat - organic pmticles nearly or fu]ty disintegraled. Fibrous Peat organic particles more-or-less intact. Bottom of Testhole - includes last sample interval. Frost Line - seasonal frost depth as described hy drilling ac[ion aud/or kamplcs at thc time of drilling. Frozcu Ground other than frost line, described by samples, usually includes dcscriptmn of ice content, often will include modified Unified Classification for froze~ soils - this is a special case related pe~ mafl'ost studies. Free Water I,cvel -- The free water level noted during drilling. This is not necessarily the static water table at thc time of &illing or at other seasons. Static water table dctm'miualion in other than very permeable soils requires obserw~tion ~vel]s or piezometcr installatious, used only iu special cases. Blow/6" · The number of b]uws of a 1 40 weight fi'ce falling 30" to ]dwmce a 2" split spoon C'; thc number of bluws for a 12" advance by dcfiuitiou, Ibc standard penetration. M% - natural moisture content of thc soil sample, usually performed on clean sands or gravels below thc water table. Type of Sample - :5~', refers ~o 2" split spoon driven into the soil by 1'10 puund xveigbt, a disturbed sample, ~, tbiu wall tube, "Shelby" used to obtaiu undisturbed samples of fine grained soil, ~, "Wab" disturbed sample from auger flights or wall of,'cnch, ~, cut sample, undisturbed sample fr()m wall of trench. ~25t[~?g[}~ a useful indicator of a soil's clayey fraction. N:':Ntmc. L=l,uw, M-:Medmm, 1t=} ligb ?'p.~}l] - Thc samples are placed into apparently similar ~,youp:~based on color and textm~c and ate arbitrarily assi},,nt'd a gr*)up Iclt,'r. I'urlbc~ disturbed lesls inclucting Attelberg I,imits, p,~ain size, mui,,tm'e deusity relationship, etc. Illay be pc~fo~lned on tlW group and ate as=.UlUed rcflccl the gcm'~al di:mul,ed characlr~i~;tics of the soils assii',m"t t,, Ibc group. This is an important phase tfl' thc ~anl au.dysis and is u:.cd standa.tize Ibc vilri~)/IS qua]ilalive delell]li]mtio~s and Io rcd~.c the ilUlllbcI I~f qtliUlliUtliVC lesls I/t'CUSSilI'y Ill desclibe lhe soil III;ISS. SOIL CLASSIFiCATiON CHART ¢/"~ ,b CLAY /,,. 30% GRAVEL oX':' cz CLAYEY CLAYEY CLAYEY / ~ OR ~ CLAYEY OR SI LTY SI LTY SILTY GRAVELLY SAND SANDY GRAVEL \ \ SA N D R SI LTY GRAVEL \ / SAND GRAVELLY SAND SANDY' GRAVEL GRAVEL 0 10 20 30 40 50 60 70 80 90 100 GRAVEL (+#4.SCREEN) % BY WEIGHT NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LESS THAN 3% FINER THAN 0.02 mm. GROUPS OF FROST-SUSCEPTIBLI)_' SOILS: F1 GRAVELLY SOILS CONTAINING BE'¥WEEN 3 AND 20% FINER TFIAN 0,02 mm. F2 SANDY SOILS CONTAINING BETWE:IFN 3 AND 15% FINER TIIAN 0.02 mm. F3 a. GRAVELLY SOILS CONTAINING MORlETt-lAN20% F-INER TI-lAN 0.02 mm. AND SANDY SOILS· (EXCEPT FINE SILTY, SANDS) CONTAINING MORETltAN 15% FINER TI4AN 0.02 mm. b. CLAYS WI-I'I-I PLASTICITY INDEXES OF MORL. Tt. IAN 12. EXCEPT VARVLD CLAYS. F4. a. AL[_ SILTS INCLUDING SANDY SILTS. b, FINE SII.TY SANDS CONTAINING MORE 'fl lAN 15% I-'INEtt THAN 0.02 mm. c. LE-AN CLAYS WIT'II PL.AS'FICI'I Y INDEXES O1: LESS TI lAN 12. d. VARVEL) CLAYS. (. ¢ 7:) :,3 War.; Groun:i liater Encountered:_ueL~,'--~) I-r Yes, /\t what Depkh? ...... P, ear.linfl I Da. re Gross Time l'let' Time J IDe?~.h to H20' I i ' I Hat Dronl i ! '1 I 099 iO o00 N I :: :.'.