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HomeMy WebLinkAboutZANTHA VISTA Soils Log October 27, 1976 R & M No. 656317 Carl Luchsinger SRA BOX 94 Anchorage, Alaska 99507 RE: Test Hole and Soil Log Report for Sanitary System Parcel 41, NW%, Section 24, T12N, R3W, Anchorage, Alaska Dear Mr. Luchsinger: We are submitting herewith the test boring results and our comments regarding soil conditions encountered at the subject site. This in- vestigation was performed in accordance wi~h your request of October 25, 1976, and those procedures outlined in a letter dated July 15, 1975, by Mr. Rolf Stri6kland of the Muncipality of Anchorage Dep~rtment of Environmental Quality. · wo test holes were put do~ within the subject site area for the purpose of defining general subsurface soil conditions for the proposed sanitary systems. Excavation was accomplished with an auger type drilling rig. Test Hole 1 was drilled to 24 feet below ground surface; Test Hole 2 to 24.5 feet. The final log prepared for the test holes has been included in Drawing A-01 and Drawing A-02. Grour~dwater was not encountered in either test hole whi]Je drilling. A percolation test was performed on ~est Hole 2 from a depth indicated and reflects average infiltration from tha~% depth to the bottom of the hole. We appreciate being given this opportunity to be of seruice to you. Should you have any questions with regard to the above, please do not hesitate to contact us. Very truly yours, R & M CONSULTANTS, INC. Vice President ~qR/sc xc: Municipality of Anchorage TH-1 ~ PARCEL 41 TI{-2 ~ Test Hole locations are approximate and have not been located by survey methods [D-A~E: - 10-25-76 [SCALE: LOCATION DIAGRAm4 PARCEL 41, NW ¼ SECTION 24 T12~], R3W ~]CHORAGE, ALASU~ 656317 TH- 1 10-25-76 SAND W/SOME SILT AND SOME GRAVEL Brown 0.07 -- 2.5' SAND W~SOME SILT AND TRACE GRAVEL, Brown 3.5' GRAVELLY SAND W/ TRACE SILT (SP) Many cobbles Brown TH-2 10-25-75 7.5I SANDY GRAVEL (GP) Many Cobbles Lt. Brown 12.0' SILT W/SOME SAND Lt. Brown __ 19.0' SILTY SAND W/SC~ GRAVEL (SM) Lt. Brown S~3~D W/ SO~'.LE SILT SO~ GRAVEL (SM) Brown SILTY SA~D (S~) Fine, Lt. Brovr~ 5o0t SAND ~SOME SILT AND SOI~ GRAVEL (SM) Many Cobbles Lt. Bro%~n 10.0' Refusal on Boulder at 24' 24' TD No Water Table No Water Table These logs represent subsurface soil conditions within Parcel 41, ~%, Section 24, T12~;, R3W, Anchorage, Ak 17o0' SA~IDY GRAVEL W// ~ SOME SIL~ (GM) (~ Lt. Brown, ~';et ' ~ 24 . 5' TD SANITARY SEWER TEST HOLES CAPJ~ LUCHSINGER m c oRA E. 656317 , PERCOLATION TEST CARL LUCHSINGER R & M NO. 656317 TH-2 ELAPSED TIME TIME I~lCHES 12:00 0 15.5 12:01 1 20.5 12:02 2 24.0 12:03 3 26.0 12:04 4 30.0 12:05 5 33.0 12:06 6 35.0 12:07 7 37.5 12:08 8 40.0 12:09 9 42.0 12:10 10 44.5 12:15 15 52.5 12:20 20 / 59.5 12:25 25 . [ 65.0 .  12:30 30 70.0 12:40 40 78.5 12:50 50 ~ 86.0 1:00 60 92.0 DROP INCHES 0.0 5.0 3.5 2.0 4.0 3.0 2.0 2.5 2.5 2.0 2.5 8.0 7.0 5.5 5.0 8.5 7.5 6.0 76.5 Inches TOTAL DROP 0.78 min/inch '~L ' [ , . · INIl~lrc'rtc:t '. I MATEfllALI ,. .40 ~..oAn " ' · . ~' .'" '? A~:L~ 12, T9~4 ..~',".,~ ~".' ' · ' O[ A~I~ ' ' ' " .... ' -' ~ ..... '.~;'~",~'. '~'~ ~,' · ' ' , ,. .......... ~.~ 7 · .~.0. 1~50~ ..... . . ,,~. , ,, ~,,~,. · .,,.....,....., pe~o~e~ on ~he ~ove p~ope~y on Ap~&l 10~ 1974. 5. he ':.:';,.'~;,"=:f ~nve~ga~on cons~s~e~ of t~o 15' ~es~ hole~ d~llec1 ~J.~h a ' ' ' Nodwell mo~ted solid core~ continuous flight, auger ~ith the ' drilling supe~ised and %he test:.holes logged by ().M~ Hatch~ ,staff geologist/senior technician. Samples were. taken at 5' intervals from %he flights of, the auger ,ne.a~ ~he ~it and '~.~',',~,.visually ·classified in' ~e field in acco~:danc~'Wl%h Lhe a '?~'.'~: sheets ~ - 3. The '~e~t' holes Were .located in the field ~ ~;.~:::?' ~e attached S~n~;..~d '~het~ fiald logs are as :"" ~::Test Hole 1 .,:. · ...,' in Peet · ' From To ~ Soi'l Des~ pt' ,0 ..~...: ~-4, brow" ~ .',~".2.0.' .:~;/,'~ 2.5' F-4~ br~n s~nJ~ 's~, damp, stiff,. "'~ 2'~" 6.5~ F-4~ brown ~ave~.ly 'sandy stiff, NPs SM/~ .,.-,?,.,: ~' ~.o' ~-~, b~n ~'~~~ -. ' :: "'"? medi~ dens~M _, damp ~ ..... '"': .' 15.0" 20 0' F-2, 'sfX~ s'an~-'~amp, "' ' ~: '~' '" ' medt~ , '"~ .... ~'. .0~"' '' ., ,..,,.~.,~: ,., ,, Dep~. of seasonal · fros ?':".', ~ ' . ~;~:,. ~., .,': . . :, -', ::...?.'~ . ,.,. :~,, '~,; ,Dep ' ' ' ~ "" .... ' " :.. :,/~:":.~' ~ of Free Wa%e~ t .:., .:, . ;.:,;? NOne .obaez~e~ ' , ?:,,' - . ',." ,,. .... ~ .,,.., ~. ~ ,;. .,..,, , .... ..~ ...., .?.i'F 1, brown'.__ !il~ Sand~ ~rave~, damp~ .,, ..... Depth of free waterl None observed~ but we~ at ~3.0 ~,~ ~.., ..... · " ,:~:~he' emphasis of %his repOrt.is directed ~oward seepage Pi~ ," · .";. ~alys~s. 'The Grea~er ~chorage Area Borough has ~stablishe~. "" .... the folloWing reco~endOd valuea'~or.%he n~er of sq~re . .... ., ~ : .. . . .~ , ,, , . ' GM. , . '. .... ' '' , , 225 .... ' SW 125 · '" '.. ' ~ " ~ ~ 50 . ~, '~: .'~ : ~,',: SM , · · Soils classified as ~'are nOt accepted by the Greater ~chorage,: Area Borough for seepage ar&a. Therefore,. a s.eepa~e pit in ~. ' . ;,:,,,:,.: the area' defined by ~.H, 1.would need to be buried 6.5" bel~' ,~;.' ~'~'~': :existing greed. Based 0n these 'relationships, fleepage ' :.'~"/:".}~::'. - -°f total depth Of ~5' or less may be'prOportioned to' ~25 ft~ ',~'~'~}~;~'.'"::~ :..In the'.a~ea defined'Be T.Hi 2,' ' ' the top of ~he pit.~uld be'. ~ ::';:"'~.':;:~:~,nO less th~ 2' deep ~d ~oul~ be proportioned as f011oWs~ ' ',~,,', ' ~ ~.. ~ ~;;/ . ~ ' . .. .. . · . . /~'~'.~',L::,~.~ ' .." Descr~ption' ~ ." .: ',' · Area ': "' "~ ''~ ,.,. , ',..,.,,,... .. . f..~.,, , , , . ,...., ",;' " '- " ~ -'" ' ' ' ' "' ' ' '.l~' ~'" -' ' · .: -. ;. ?For a'fo~' beseem hous~ :~he :oeepage ..~.. 'excava~io~: ~ul~ ' .'.....:;:/~,', ~:.,; as fOll~ l ~,~.,' " ' ' ' ' ..,., '"',,;, .... ....,~. ,,,,,., ',."-~ " , "~", ."~"?', feel trreo to contact our OffiCe. '~, - ..,,., , Very truly yours, TEST~B x' '" ' · CON~I,-TATION .'..:/~" ~ CLAYEY ~./ CLAY EY SI LTY \ SAND \ \ AVE \ AVELLY SAND INSPECTION .:~.. ' 0 ~0 30 40 50 60 70 80 90 I00 '->~ VEL I+~IO$CREEN} % BY WEIOHT . ,.:,,.-. ''NONFROST SUSCEPTIBLE' 901LG ARE INORGANIC SOILS CONTAINING LEGS THAN $°/o FINER THAN O.O~lg. ' ,.~,. :-I' · .' ~ROUPS OF FROST-SUSCFPTIBLE 901LS~ "-- ' ' ' · .... FI .. (}RAVELLY SOILS CONTAINING BETWEEN S AND 20°/0 FINER THAN O.02m~, .. . '"". ~' F2 SANDY SOILS CONTAINING BETWEEN :~ AND I§°/o FINER THAN O.02mm. · F4 a, GRAVELLY SOILS CONTAINING MORE THAN 20% FINER THAN O.02mrn. AND SANDY 80R.~' ~c.;:, ~.~.; '',.. ~,. (EXCEPT FINE GILTY~ SANDS) CONTAINING MORE THAN ISO/o FINER THAN O,O~,,~lg,- '. ,'.; ';~,' :;'.': .: .', ~ CLAY~ WITH PLASTICITY INDEXES OF MORE THAN 12, EXCEPT VAR~D ~LAY~.", .,' ';,:;'; ' · ' ALL 81LT9 INCLUDING 8ANDY ~ILT~. ' , ' "' ::' ':-. · ,' ": ~ VANED CLAYS, ~,.. '. ' . . . '.. '~,..'' TM ' "', ~"~, ::,'. ". ' :;"'~' :~;, ." .-," '" ",".ASKA TES LAB ~, CON~ULTA?tON I T~TIN(~, e EXPLORATION /, ~"~CHEMI~AJ.' ~ MA?ERIAL~ · IN~PECTIOfl .... Soil Descriptlon / ,., ,,,~ ,,,~-" , %', , , ~ '- '1~'.~ ~he'~ela~1ve .~e Of .~o~ ~d ~hd..~oet o~e.1~.[~a~to~ age eh~ on .... .~.:.the shee[~ "8~ti o[ae"e:[ftoa~lo~.oh~," ~ *' ;,',, C,,* . CObbla - ' ' " " ' ' ~p~o~.Lma~ely 3 ~o 8 ... :" '~'"~' ~1~ .Co~ ~loNs/6" o~ 140-~b~, Net~h~ Ea~tn~ 30".~ 2" splt~ spoon '.,,' .... ~..'.Deaa~,,~ e~ima[ed by ['he'~aCe 0~' d~tl[tn~ ~ype o~ so11, bl~ . .. ,.~ · ' * Comt~ ~d mots[u~e ~a~e, ' limit (.~) as appropriate. ~. ,-' ~ ~ Liquid Limit, see P'L .'*~. *~:,~-'~'~ ~'.~. laten~ is ~e ~ility of Wa.ter~to ~rate to'%~he sur.face.up~,v · ..& .... , ~ ....-. ..... vibrati, on ~r jolting of a'..s~ple:~ an a~d in dete~niag[ .., .,. whe~e~ a soil is predominately a olay or silt. .- Well graded ~tiformity coef.ficiegt ,greater than 7 . '-"¥"~" ~rly graded - unifo~[;%y coefficxe~'~ less than 7 '", *' :' (Unifo~ part*icles~ ~gap graded) ' ~'::"' Organio Conte~t - estimated by V~l~e, not particula~ly, precise~ · '.'. . <, '~' ,""'"'.. '... '. ~1ayey. SOile a field method how. being used as an aid to identlfi-. '~':;~ .:..,:...' ; ' ..." .'.' .os;ion' of these.spi:la as a c0~ination ball drop, and: . . ,:.......::.',. '/, ' · "' ~." rolled .th~ead,tes% in .which a 2"' di~eter'.:ball of the' . .' ..:...: .,...' : . . ..... ,. S~d-Sil[-Cl~y. f~oElOn ~,~ropped 2' until a 1" thick .',.'...." .:.,.~,..,,~ ',... . :.. ' pa~ deveXops. The d:[~e'~r' of a thread at cru~ling~: .;: :.'.">:';',7 ..-. ,, · rolled from ~'e resultant pat dete~ines whe~er clay or silt predominates. '"' ...... " ~)~ 8~reng~h - a small s~ple of the soil. is foxed into 'a cube ''. ' ' ..... air dried, and crushed between ~e finge.rs. High d~ . ':'..'~." . · strength indicates (=lays and low silts .'.. - . . ".. Wa~er T~le - the apparent water t~le at the time of observation'. · ".. ' :.'",....".'.. ' ' Often the actual water t~le may be higher, unless ~ "."'"~.:., .C'. ..... .:' .' hole is allowed to remain open'or is converted to an~ '~ ' obsess;ion well. "' :... ' ~api~la~. :Fringe - change from moist to ve~ d~p, 'or saturated . '.'..~. ',: " usually indicates that water..t~le is close. ' '.."",. . ..:." .. ',,"} Pea*: -' - Fibrous material of macroscopic and microscopic krag~en~ ,. .. · of decayed veget~la matter; vemy compressible, unsuit- " - .' ' . ." ~le for fo~dation or e~ankment. Color light br~n '. ',.:. to blaok~ .. · .., · .. . . · ". "" .. A. '~'. - ' The Upper. l'ayer., suz'faoe soil or ~opsoil, '~On~'aini,g · . ..'. ' '" . h~us and/or org~ie debris~ no~ sa[isfaoto~..for ~ .'., . ,. "' "" 'Eo~da[ions. . : ' .'. .' , · .:. , , · . ~,.'" , ' · ' ; '. ." ' . .:. . : '.., · ',' ~ ' .' ~ :' : ".'-. F ' ' .,.. .. . ~ ~.,... . . . , . ~..' .. ,. ,'., . · . ~. *. ,,~ .: ~, :.: ,.~, . .... < - Z ~e®~ ~