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HomeMy WebLinkAboutCT 77-15; THUNDERBIRD RANCH SUBDIVISION; REPORT INVESTIGATION OF SEEPAGE PIT SEPTIC SYSTEM FEASIBILITY; 1978-02-20John B. Fox-P,E. DavId' J. Newton-a.E.G. , ' Stephen O. Olllemuth.P.E, SAN DIEGUITO ENGINEERING. INC. AVENIDA DE ACACIAS P.O. BOX 2004 RANCHO SANTA FE, pA 92067 766-1861 756-3064 ~ t2 -,ftJ -7;" ~ '3. . 01. ':I tJ. f1 CIVIL ENGINEERING ENGINEERING GEOLOGY SURVI;YING SOIL'TESTING Report No. 2 lVIr. Kenneth Reynolds 9421 Leilani Drive Huntington Beach CA 92646 SUBJECT, Additional Seepage Pit Tests, Proposed Thunderbird Ranch Subdivision, Carlsbad, California. Reference, SDE, Inc., Report "Investigation of Seepage Gentlemena Pi t Septic System Feasibility" Proposed' 36 Lot Subdivision, El Camino Real Northwest of Hidden Valley Road, Carlsbad, California", Dated August 4, 1977. In accordance with your request, we have performed three ~dditional seepage pit capacity tests on the subject site. , ' The tests, performed on February 9 and lQ, 1978, were intended to prbvide further informat~on regarding capabilities of sub- surface soils on the reference report. Our findings, are trans- mitted herein. PROJECT DESCRIPTION AND SCOPE The tentative map for the propo'sed 17+ acre Th.:underbird Ranch Subdivision has been revised from 36 lots to 40 lots. Single family housing units are proposed for the lots and site grading will be required for site development. The scope of our work .and general site conditions are as described in the referenced report. • T 1'1 • SDE 751 February 20, 1978 Page Two FINDINGS Three additional seepage pit test holes, herein described as B-4, B-5 and B-6, were drilled to depth of 50, 65:.and 66 feet below existing grades at the locations shown on the attached Plate No.1. The holes were drilled with a 36 inch diameter truck-mounted bucket rig. Subsurface soil. conditions encountered in each of the borings were recorded on boring logs by our engineering geologist during the drilling operation. The boring logs are presented on the attached Plate No's 2, 3. & 4. The earth materials encountered ih the test holes consisted chiefly of interbedded light brown to gray brown sands and ~ilts with some clays. Free water was encountered in boring B-4 at a depth of approximately 46 feet below existing grade (approx. elev. 24 Ft. ASL). Free water was not encountered to the maximum exploratory depths of borings 'B-5 and B-6-(65 and 66 Ft., respectively) • SEEPAGE PIT CAPACITY. TESTS The water absorption capability of·the soils encountered in the test holes was determined in accordance with procedures of the San Diego County Department of Public Health. The tests were performed at locations with approximate ground surface elev- ations of 70, 80 and 98 feet. Seepage pit tests were performed with the maximum test water elevation near the proposed finish grade of the lot on which the pit was drilled. The ~esults of the tests including the results of the original tests per the referenced report are summarized below. J. ! • ~ '. I" TEST 1:!Q1:& B-1 B-2 B-3 B-4 B-5 ,B-6 ,e SDE 751 February 20, 1978 Page Three DEPTH WATER ABSORPTION PERCOLATION RATE VOL TEST (FTl RATE {GALL24HRSl (MINLINl WATER (GAL) DATE 36 1275 5 22002: 7/22/77 56 7057 0.9 86002: 7/22/77 18 8362 0.8 82002: 7/22/77 50 ' 8036 1.07 82002: 2/10/78 65 5960 1.45 75001: 2/10/78 66 8493 1.02 7500! 2/10/78 The water absorption rates measured in borings B-4, B-5 and B-6 exceed the minimum health department requirement of 5000 gallons per 24 hours for a 3 bedroom single family residence with a 1000 gallon septic tank. SEEPAGE PIT INSTALLATIONS -REVISED 40 LOT TENTATIVE MAP Seepage pit slope setbacks according to th~ San Diego County Health Department are determined b~ the following: D = 5 X H, or 100 feet where D = Minimum horizontal' distance between seepag~ . pit and top of slope, in feet. 'H = Height of slope in feet. The setback rule is especially important for the proposed lots on the west, south and southeast perimeter of the subdivision, lots 30, 36, 37, 38, 39 and 40 located in the central portion of the subdivision and lots 23 through 27 in the northeast portion of the site. , , , . . ' SDE 751 February 20, 1978 Page Four San Diego County Health Department requirements and further seepage pit installation requirements are presented in the referenced report. The seepage pit tests were performed on the site in accordance with generally accepted engineering principles, practices and governing agency requirements. No warranty either expressed or implied, is intended as to the final number of lots and/or' lot configuration on the site. If there are any questions regarding this report, pleas'e 0.0 not hesitate to contact this office. This opportunity to be of service is sincerely appreciated. Respectfully submitted, SAN DIEGUITO NGINEERING, INC., 26.52.5 CCI submitted " . '. ·; J :5,oE 77-7SI : ' ,. J, . " "~ i,.11-/')· Project rl/'/"{')/;/":'~":'J-' ,:""1/:.1 Boring No. :;-4 Location _________________ ~W.O -7;5'/ Drill Dote ~'bh8 Surface Elev (,::;1: I Logged by v.. ~-'!·.I Drivi'ng Weight---- .-. I-W W La.. -:c ... Go W g 8. UNIT' toil, fill, alluvium, ailf6tonG, otc.) g , _ ;:l;(/) u MATERIAl. DESCRiPTION (%.and, lilt, cloy; color, . ~~ if ATTITUDE MEASUREMENTS: consolidation, etc.) ~~ <t a-aodding F-Fault 0 r-...;;ffi'--f J. Joint RS-Rupture Surface • ~ C· Conta~t " ,_ r.;.>C' / ~.~::: Dark .Brown Wet to Saturated ~oose ~~ ... :, -' to Soft Clayey Sand to Sandy Clay /C/.. ~--~j~ -------~~ Brown. to L'ig~t Brown (M~ttl'ed) ': Humid f;. , ," to Mo~st Med~um Dense S~lty to . ~~ . Clayey Sand ,.. foe /5c. ," :". "'.: .. t--... ",:: ::. ~~. ~! j 4 • .'"\.: .~ ::" ': 1--.... ::: .. :.::. " .~ '1:]' ':Brown ~~ Light ,Brown (Mottled O'range [.:5.'1i ~-4 .-:': Gray) Humid to Moist Medium Dense , .... 'lIlt.. , ~-l' ..;,'. -.--~ Silty sa~~/s~nd~ S~lt' .. ~--.=: , ,. Light Brown (Mottled Orange/Gray). 1-,' Moist Medium Stiff Sandy Silt/ " ' . ' , ' S il ty Sand ,'f4 ~ " , '\, .. ~ :)M \, I" ' . . '," " '.L ___ _ ~~ ! r... -4u,.a+-. ;H:.·..J..jJ. ' 1---------- Gra~ to Pale Orang~ '. Dense Sil ty Sand ~--~.~: . ~ " ','. :'. . ----------J--~. : '., '.'. "7"';-:; ':-:]1----,...--'. GJ;'ay Humid Me dium Dense, ~-I : :. : .' "', S Sand ~~ '?~) ..... ,., . '" t-~I~f-!-:' " . '" '" . ~ , : :: '""Light BrownWet Medium' \ -, . , !'('. 1.0 . ' 5P1?j' . ..; (5P J---t •• , . . ~Dense Sl'ightly Silty t---4-,l'~'~.; ._--Sand t---' '-_VlvV '" '" _--~-.• f-ol(~, '" ' vV •. ."" Gray Wet Medium Dense . ~~ :-f.ec<;'-ta-'-'--""I..lI~ ... ~y Silty Sand : Gray (Some Orange Mottling) ... .. . \MOist to Wet Medium Stiff Clayey' Sil t/Sil t~ Clay .~, ~' f4 .. : .. ' .. .. · . · -· ' .. .. · . .. .-.. .. ., .. • " i. .. .. , · . · . - Oo. to: · · .' .;.. · · .. .. .. - ....... .. L._t __ -'----...;...----...,;·P:.;L;:A~.T;;.;E;;...,;;;2----~ ... --"-~-~--~-1 .......... , ,. i, ". • I " Prolect '1,/ () '-.II),~ 1;-\;;-1'" J'. )";'11: ,1 Boring' No. 6-.:; Location ________________ _ Surface Elcv, ·:~i Logg cd by_.-..;;;D;,;;..1_"...,:f __ t=' w W IJ.. ..... X I-0. W o g UNIT (soil, fiU, alluvium, silhtOOEl. ate.) u MATERIAl. DESCRIPTION (%sond, liU, cloy; colOf, ~ ATTITUOe: MEASUREM ENTS: consolidotion, .tc.) <t B-SoddioQ F-Foult f-...;~r--f J -Joint RS-Rupture Surface • W.O c5 OJ ~U; >:-0 (/). (/) 0.' ;:,.::> 0 0::: U 75"/ Drill Date Z/7/1<": J l J" , Driving Weight ~ '-:1->-~ ~8 1:: wI?- 0::: (/)IJ.. (/) ;:>1-w, C'COAE z ... f-Z o:::(/) W U eGo (/)W '3: a·aAG -I-~g '. Oz >-~o Will 0::: U Go 0 j C· Cootaet .' ~~1(~~~~~~~------------------------~----r--~--~---i---1 v Brown. Moist to Wet S'oft ~ ct. ~~ to Medium Stiff Silty 'Clay/' ~ ~~ 1--4 I-' "" Clayey Sil t . 1--4,.,1-'1--"" . foo ; 1---4.'.r,""-,-I--~ ._: -~ ~ (:: '<f: . Gray We t to Sa tura te d Soft . 1_ )1-/{/ 1-1-3V -,,'.!~ ... ' '. to Medium Stiff Sandy Silt/ r-0/t.t <.,: .~. :, Sil ty Sand ,.' ~i-1--4~'-ru .' '\ . ~II"~' I---f··.'::~~;':·l ~ Gray W~~-S~-~-;-t;;~~ium .i'h ,>~:::,,\ . \ Stiff Clayey Silt/Silt;}' ~IM t--t-:..::L::.:'l..:1..:: : : ~\ Clay ~-' I-f-') ') -: '. : .,: . . _,,_______ 1 _ • f-~p. " :'~.fO ===;-\ Gray Wet Medium StUf Sandy ,.~'l;:'~ 1--4 :i'/l'f -----, \ \ \ Silt:. to Silty S.and .. • ,-"%':=... ' l-_~;!;C l .' Gray W~t Medium D:riS~· san~ : 'f"''''';c, f.. 4 (). ,t>,': .; , , foo- •• ~ • 0 ~ ~, t---t :>() ;::0: \ Medium Stiff/Medium Dense . 4 • .... J '~', Sandy Sil t!Sil t~ San~.. . f. ,S'w t--~ I .: ' . ..:. ____ . __ _ :,.J,; .. : .' ' l' Brown OVlo't~tl.e d Orange) W'e t ' f.- It .. ,4 '. ,Medium Dense/Medium Stiff ~ I-f. ~ r" .', ",0 { ,Sil ty Sand/Sandy ~Sil t·_ . vt--~ ' .. " _____________ . ___________ ____ .. ~ e •• ·, ..--~ ..... ... , , . ' t---t • • ~.. I J-~ .'" • ,Light Brown to Gray Humid to Moist Medium Dense to Dense'Medium to, Coarse. Well f. • Graded Sand with Some'Gr~vel ~ -__ I---!''':''' __ -----I f-' . fo .. .. f... f- ... . , . , ,. .. .; . .. · .. . ;-. '. · , .. .. - • .. · · , ' ... .. .. . I · .. • '., .. " • · .' . .... , , .. : .. .. . , ,. .. . , , , , I • i t, . • t .... .e Proiect_I_,._1 :_/ _1'" .... '-,!,_.r_, .(_: _:::,_. '_'1 _!~. _ ... /_ •• _,/)_. _"! __ Boring No, ~:~. 5' Location _________________ W.O ?'S.!Orill Dote::::"./'~/7? Surface Elev, <~~r;L I Logged by __ !' .... !J_ft..;..I__ Drivi'ng '«eight _____ _ E w u.. -:.c UNIT (Ioil, fill, alluvium. silf&toOEl, ate.) MATERIAL OESCRIPTION (%aond, ailt, cloy; COIOf, ATTITUDE MEASUREM ENTS: conaolidotion, .tc.) c5 co. :;EU) )-' U)~ .-:.-~8 U)u. w ......... C'CORE D:U) >-'!:: u), ~ ... W O aD. .-a. w c;» B·8oddino F-Fa ult CI) a.' ::,0;:) o w.o~ B'BAG Z-J' )- Wg) 0:: ~ (,!) a. Q J .. Joint RS-Rupture Surfaca • 1 t· • .. ~." '. r .. t----t'-.. r ~ .. ! .. ~ ,. ........ _'9 1-1/.r._ .... I ~ , .. t---t :'. ".~, c· Conta~t .. Brown to Dark Brown Wet to 5c./cl.-'1---' .. ' Sa tura ted Loose to Soft qlayey, Sand/Sandy Clay ~ --. Brown-Wet Medium Dense/De,r:lse, Sil ty to Slightly Clay'ey , : .. Sand .,5141/ /5~ . i-' i t-~,-Z' t---'t .<:... • ..,:.' Jr-' -I----.--~----_._---'-'--,-- , I-' 1---,: . ~ II· " " ., . t---t ~.; ':.'. ' Brown Wet Medium Dense/Dense ~~W Medium to Coarse Sand w/some' Gravel ~ ...... ~ ~-' J-o-i:;I".JTIII/l1f . Light Brown/Gray Moist to Wet hIt ., ~~ '0 ;~~)h~ -\'Medi~ Stiff Sandy Silt ~'-.' ' ' •• :~ " -------. \ ' , f-51-1frrll.. .. t--"'i<:f'}~ ~£ght Brown Moist to Wet Medium" L .'-'-" t--t ,-~,t:~ t nse Silty Sarid/s~!lY Silt ' .. ~'~_ ' . ,~I'~ I ~ Light B~own Moist to Wet 'Medium t-o fl1';1ltt I""""" .. ''.,'' . /~t~ ~\\\\Dense S~lty' 'Sand . " ~- V. '" ~ 1---.... /;V/ GraY/Br~;-n (lVI;'ttled o'range) f-j~%( t---... ,I/ .v:..-· Moist to Wet lVIedillIll Stiff Sandy f.o " ~ Sil t/Sil ty' Eine Sand . ,'_" . ..:..-. '. :.:~. "\' .--~ -. , ~7' . ~~7o :~·f'.; , ~~i~~ ~~~;!~e~ll~/~~~t;egf: ~'ZL J-o_t~~,V vI ' .' . . __ ::i~ . t-o_vrvV v ' Brown Moist Medium Stiff to .. ~ ffxl; v Y \ Medium Dense Clayey Sand/Sandy .. l:::~.k: _' _', . Clay(Clayey Silt,. .,' . '. 'I. ~",,-,,:'_' , ~t.o 'IS" -.--.------, I-. " Dark Brown/Brown Moist Meaium ,l Stiff Clayey Sil t/Sil ty Clay.' i ~ , t-o .' ~ " 1<'. - PLATE 3 f:o , .' . . , , . ' ... . -, ;"" . , , .. .. -.. L • · · ~- ". .~ i " .- • ' .. .' . .. · · . . -' '. . ~ ". " .. . " " , I: • ; I I , . /'.1 -r,L',,·'" I'"t'-',",II Project " ') , J,'?, , ',' Boring No, r~l-(~ Location _________________ W.O 7$-/ .,~ /~!?'" Drill Dote (' ", Co Surface Elcy, '~):-' I Logged by t: ! r :' Driving Weight __ ....-_ i=" (!) W 9 W 0: U. U W -... :r: :x: ct t-o. ~ a. oct W tr 0 (!) UNIT' .oil, fiil, alluvium, silf&tonG, otc.) MATERIAl. DESCRIPTION (%Iond. lilt. cloy; color, ATTITUDE MEASUREMENTS: conloli~o'ion, etc,) S-Scddinc;) F-Fault J -Joint RS-Rupture Surface " . .-: ... ~8 (/)u,. w, C'COAE oc(/) W ~ B·BAG Z.J Well '0. )- t: (/) Zit-we> 0'" )0- 0: o· C· Contot.!t .. ~~?)~~~~~~~~------------------------------~--~----~--_1.----~---~ t-_n'V;::"v . Dark Brown Moist Medium ,Stiff 1'/ /v ' Silty, Clay/Clayey Silt , C%L " t----t[v .... y , f-o .:.:.,......' . Gray (Mottled Orange/pale f-o (/l{(/ " 1--4 I H,~, +1 _____ -.. Orange) Moist to Wet Medium ~!~ !-f-:' 'J _ :;:. :.~ :.~: '\ ti,ff . C_l_ay_~_y_S_i_l ty (S ilty c_~_ay_ ~ "'Z' ,'. t----41 ',: 1,1, '). '. I ' . 1.0 '5ff1 ~~':::·;,...I'·-I-J---'--"'" Li~ht Bro~n Gray Wet Med~~' . _'.--:-"-I--~ :::~~:'~;) \~_tfi~/~~!~_um ___ D~nS~andy S~l t/:~;11i ,', '. Light Brown Wet Medium 'Dense .. Silty Fine Sand "f-" :,' _ ........ , ' 1-, .' . " . ,----. ,,---.. , ,.~-----'----... f1iL Gray/Brow~ Moist/Wet Medium' ~ /. . stiff Cl~yey SiltY/Silty Cl~y' ,c~ (Pronounc.ed Bedding' Structure fo I " Evident in Cuttings) , .' fo', ----. ...J.., , ' , ,......-J.oo-'-' - Pale Yellow Moist Medium Stiff ~L._ , .' S il,t "'" , ~ .. . , \ ,--'-~/t:' Brown Moipt/W,et Medium Sti'ff, - Slightly Cla~~y, Silt. ," ~ '; 1----__ _ \ ~~, v~ , 'Gray Moist/Wet Med~um Stiff ,c~/t., 1--+'H4 ~ S~.~ 1 ty Clay/Clayey 'Sil t '. ~,-:- l t11t.-': , f-o' , Gray Moi'st/Wet Me'dium Stiff,;, "" I Silt i'l-- ,t-.-.... '-1---,-....----'-" '~~ " ... i--.. • I ., .... ,. 1. ,. ". • • , '. · - , '. · ',' .. .. - • · · · '!II!: , ~ , .. · .. j' - .. " .. '. -. '. . , . - ": PLATE .. ,) ',' III., ~IIII __ J.. ___________ ..;.,.:..·' _~_...;......;......;.;.._ . .,.. L.., _ .. --~.~ ... _,..I.-_,-. _~-:-_.J.;..""". ~~_ . , ,e Project. -:I-/(I,,,jQ/.~("';"!I'!),I 0/.')' I! Boring No, ,'~~ ':J Locotion ____________ '--_____ W,O 7 S' I Drill Date '7'/7 <\;' Surface Elcv. c:' ().J ' Logged by ~.!~ /' ( Driving Weight ___ _ .-I-W W lL. -:c I-0. W Q UNIT 'soil, fill, alluvium, siltsfone, ate.) MATERIAl. OESCRIPTION (%aand, lilt, cloy; color,' ATTITUDE MEASUREMENTS: coololidotion, etc,) B·Boddino F-Fault J .. Joint RS-Rupture Surface • ..J, o co, :Ecn )-' cn~ en 0.' ~::> o ~ C) '-:1-~8 cnlL. W...... c.(:OR£ 0::(1) (I)' ,zoo-we) aGo W ~ a-aAG Z..J)- Wg;) a:: Q. Q I C· Conta"t ' .. ~~~U~I~l~~~~~--------------------------------~--~----~---1·-----r---1 :;'~:::~J"!-.. Brown Moist Medium Dense/ .. Sl-IA ':;'~:'" Dense Silty Medium Sand " J-~-t : .... _ ....... ~..... ~ j \ 4-1----------- . ,-. . " .. ,......~ ~\ :"'!, Light Brown/Gray lYIoist Medium foo , " " Dense/Dense Medium to· Co~rs'e. ,~, ','<. Slightly Silty Sand w/so'rne '" ~ Gravel • p ... , , " " " t----~ " ~ ,0 " , #' , 1--4 . ",', i" ,f/.~: ' '-----------J-~ ,:;,',:', Li;ght Brown/Gray (Mottled :"5,1//' . . Orange) Mosi t to Wet Medium: t-1c ~ ,': ~ . , Dense Sil ty to Clayey Sand ' , ~t-uo • T~~I':1 Gray '(M~ttled oran~e/Brown) ---~;U~ " t.',,:;,,,,,· Wet Medium Stiff/Dense Sandy 1-11"""';"" i 1---... ,' ,,": t':':':: Sil t/Sil ty Fine Sand ' , ro91Yh/v" "',' " 1---~ .. " 3' Light Br~~n/Gray we't/satur~fo't:17 . t--t ". ' ,Medium Dense/Medium Stiff, I "" 15m ~""';.~. ,Sil ty Sarid/'Sandy Silt ,", " ,: ~_' " ~ Brown ,Sa tura,ted SO,ft/Mediuni ,"~'-~ .' .. 1-.. ,- , '\ Stiff Sandy S,i~ t ' , ' \"':-' -: : , ' , , , ,PLATE',) ... ~,: foo' '"'. " t.- f. I:- t-, : .. .. - " ' .. . , .. .. .. • · ; · ", , '. .. .. i .. .. ,. -.. ,oo , . ,'. - ~ , . " , .. " .. .... .. . • . , , " . . • Proiect....:,./,;.:.f..!,;.V"'_· '_I'_{'."_:-'_."_";_'_ ,', _1_'_"_" J_: ,_,! __ _ :: . .I., /_,:-Borlng No. r~-f,,, Locotion ______________ ...... __ W.O "7 )"I Drill Date ' ~'. ~, Surfoce Elcy '7i?:I: I Logged by .k,,') .JJ .J,'-/, Driving Weight~·-~.- E w lL. -x t-o.. w Q O..JW UNIT (soil, fill, alluvium, siltstonEl, ote.) g . ~ (f). u MATERIAL. DESCRIPTION C%.and, lilt, cloy; color, fu~ it ATTITUDE MEASURE~.'lENTS: con.olidation, etc.) ~~ <X a-SoddinQ F-Fault 0 ~ J. Joint RS-Rupturo SurtQco • ~ _ .. 0 I C· Conta~t ~ Dark Brown MOist/Wet Soft ~0'1l- ~'t-~8 (f)1L. W....... C'CORE D:(f) t.J ~ B,-SAG' z9' wm .0. I--lg \D ty Clay/Clayey SD t', . :-:c- 1--l1:':":";': ! :. Light Brown Moist ,lVledium' Dense ~ ~. ;(:~;'~t· \Clayey Sand . 0":' • J---I;' ( -::" \ ~ $/1\1 !-f. ~ .. :,)?\ Light Brown: Humid M~dium .Dense· ..... I-"---t---t00 ,Silty Sand ". J.t:.L~t. J-_~T~-::-''''';-:1'-LL -----_ ..---J>:1 ;;\jGray to Brown Moist Medium' 5~/'V) J--f"'Tl~l'[l]"" ~ Stiff/Medium Dense Sandy. Clay/ -'/41 L ~-4.l ' 'Ql~"y-e-y_ s'and ~---. ~.~ Brown Humid to Moist Medium c~ f-t-f._' {_/ ~ <iliff \ I \ Dense. Clayey to SU ty .SaM . :::;~ .. ,' . ~Jull ----__ .. ' 1---4 :;,: :~: .J. t ' t ~ ~;i1i1 J-_-{~-:....J.''':-:'..:1,-' ..' ". ,~.-.- 1---4 :~:~.:~~~r:~,. Gray Brown (Mottled) MOist',· _ ... ')/M ...:.:...:. -£ . '. --~ .. 1'\ .. '" . ~ "l S tiff Clay" ' .., \. . , t---t',,",:: ~ . \. Light Br'own/Gray' Moist Medium f.- (. ;: -t 0.. ,Stiff Sandy .Sil t f. ~w t--~ .. :'. ~ " " ~ J--f (J' ,'b",: ',' ~l-ght Bro~n' Moist Medium 'Stiff/~ . ~. I Medium Dense Sandy Sil t/Sil'ty...: ' ~f. 7~" ",' ,,'. . Sand - ...... _-1 /::. ~ . \ I ~Light Brown Moist M:diUlnDense : , '. ,. Sil ty Sand •• 1 f.- ..- >-w~ t: 0: (f) ::>1-.z .... t-Z w·o (f)W eGo -I-Oz >-:lio a: Q U .. • · . .. -· ' .. .. . ... .. -.. .. .. .. ", '-, .. .. ,. .; .., • .' · ... • ;, .. ~~I'lITjh Light-Brown HUln~d/MoistMediuni." .,:-; . !-'''" I": .. '. ,I. '.\., Dense/D~nse Med~um to Coarse· ... ;s~ .' ,,:.-.\' Sligh.tly Silty Sand w/some - 1---4 '. 'l Gravel . .--.-J---I:'~:: ):~ , 'Gray (Mottl~d Pale Orange) : 5", \~. ~Moist Medium Stiff Sand'y Sil t/ Very Silty Fine Sand 'f. . f-.. .. .. : .. .. .. -.. L--.L--J' ____ l-______ ~ __ ~ __ --~"~-----.-. ----~---~~--~----~~I U1l"'. ,. PLATE 4 I I I I , .. ,. I l " I . , .... 1 .. Pro iect ....;.0.:..7~1 :J_,_,_" _",_'.~_"!_', '_' _" _I_"_'!_' 1--'_1 __ _ 7 r-/ ? j.' /7::' Boring No. B -{? Location _________________ W.O,--' __ l:.....;.._ Drill Date -" (J . , (. 7 '., Surface Elc'v. '(-Logged by_'l_"_' '_' 1 __ _ Driving Weight 0:: w I-~ :J :- ..... ... W W u.. -:c. ... 0. W Q ~?~ c.!) 9 0' x n. <t ,UNIT (soil. "U. alluvium, &iltstonEl. otc.) MATERIAl. OESCRIPTION (%Iond, lilt, cloy; COIOf, ATTITUDE MEASUREMENTS: consolidation. efc.) cr c.!) I B· Bodding F-Fa ult f-";;;"~ J -Joint RS-Rupture Surface • C· Contaet . ----, .-_.-... _------,-------'---:- ...J 0 co :l:U; >-0 1/). I/) 0.' ::J:> 0 0:: '" ~ " \,~, Light Brown Humid Medium Dense ) t---t .~ ;-:,~ ~~ Slightly Silty Medium to CQarse. !" ~If\ t---tl:":":-':' Dl""",, ___ S~~d w/Gra 'Y..~l___; ,. _ ~ _: . . 1-'1-!!?8 I/)u.. w, 0::1/) .:J: ~g, W(g a. ". 'J--t :' !; ... ~ Gra:y (Mot~led Orange ~ Moi?t', " ~0i/t, ;:;~. I •• " Medlum Stlff Sandy S.ll t/Sll ty "." .{,M'" . .. ,.I-,..ll----.... Sand w/Some Clay " _ .. _ '1--' -," .,. ..... j .. \ J--t ',. ,,"', Tan to. Light Gray Brown' Mois·t f-.. ~.':/. ,: Medium Dense/Dense Silty Medium "" ., t-o---t ~,,~,~ : to Fine Sand . '''' ,,:" r--"fl:",;" ff .... .. . ..---1 " ~;' r ~~ 5'\ ... ' ";' ...... , ;~":' r--"11 -. ',': \ . ;~~'.--'---'- t---i ~~. ,'J1 ~ray' (Mottled Pal,e Orange) M~ist f-lM/! t-----t ~ -':.1l Medium Stiff/Medium De~se Sandy fo ' t;"", t--i'-;~'" .:o~ ·,,,,~il t/?~~_ty S~nd. . ;-:-D/_., ,~. .' Tan w-Llgnt Gray Humld lVJe.dlum I""':''''t-/1') • " •• :~'1j ~ , Dense/Dense Medium to Coarse . r-5w t---t~';~;':\-.-;:.'" __ c.t~~.£,~~~ Si~_~y E~_nd w/Gravel_ &' f-o--':" r---fl "/',,~'." Gray (Mottled Pal·e 'Orange) Humid JMl/, :.~5.' .', to Moist Medium Stiff/Medium. . ~ /~~"1 t---tlJ'7i,~, ,~::r, "::., ", \. Dense San9.Y Sil t/Sil ty. Sand' w/ 7-', . " "'",',;, ",' Gravel &_C_o.b..blas_, . 1-'P1/t~t,... t--t ;:....,.:... ~-, ...... ~ Brown/Dark Brown Humid Medium,' I-~ f \' ... ;.' ", \ Dense/Medium Stiff Silty Fine ~, ,:' t---i~,:' '; '" \, Sand/Sa~dy Sil t . \: ~.~ f-' t--t , ': Light BrownjPale Yellow/bark fo'l ,: .... , \ Brown Humid Medium Stift. Sandy t----t... Sil t/Sil ty Sand .' '.' . ~. "---1 "j., " . r----t . . : ) r----t ~ '. _ 1 __ -:' I:·~ :~ .~,~ ~-55'->, ';' .. Tan to Light Brown Moist Medium Dense PLATE 4 '1 • 1--. , I-, .. ... - ~ ... , f-~/111 .. .. ' . " I' >-t: I/) C'COR£ z ... WU a-aAG OA >-0: Q w~ cr ;:I'" ... ·z I/)W ........ oz :to U . .. ." _ .. . ' .. ~ -.. : ' .. I . , . ·1 .. ., ,: I' ,I I, I I,t '/ " " , , ,. I I I i' i " '" ( .~. •• .. -), ( Proiect_"",I __ / ... 'j,~_I_!;_' '_''' ... !~_'_' '_(._1_1 _'_f_l'_' __ _ Boring No. /, .. -:> Locotion ________________ W.O 7f/ OriIiOate,A:/7:r Surface Elcv, "';? i-l Logged by_-""'i) .... J~!·_I__ Qdvi'ng Weig'ht ___ .... i=' w w a: u.. w -t-X <{ t-:. 0,. W Q (,!) g u :r o. <t ~ C) , ' UNIT Cloil, fill. alluvium, silftifOn(l. otc.) MATERIAL. OESCRIPTION (%Iond, ailt, cIQY; color, ATTITUDE MEASUREMENTS:conlolidotion, .tc.) a-Bodding F-Foult <5 00, ::ECf) )-' Cf)~ en 0,.' ~:;) o ~ J. Joint RS-Rupture Surface C· Conta~t ~~5j~.-,~,,~,~:~----~~------------------~------------f-----+----+---~·-----+--~ t-~ ,:;',i.. .;" Dense Sil ty Sand \l) .. ~~ .. , ' ... ' ... 1-5"",- • !... " .. ; ~ :.. \ '--'-'l----... " '1~ ~ \0 ~~ , \I' ,,: f----, .. '. 1---4 ." \", .. ' J---I '/" 1 :", 6~ '-:*'1: ~ • \ " 'b f-f-ft 0 .. ~;' ~ b. "'d ~ ,~ " t. )/11 t----f . b-'~J ~ • ;, ',i' .~ . Light Brown Humid. Medium Dense!' ,. Dense Slightly Silty MediUm: to ~ ," Coarse Sand w,lSome Gravel, . S;w , II '., ~ t---I '0 ... \, • 0 ' ;:-'-1--- . ',," t----f ~vY;: 1/ ',l/' J---l ,._,.j;.-. . . ':" .. , Gray (~ottled Pale Yellow/Orange) c~1 Wet Medium Stiff Silty ,Clay/ ..... , ,. I " v"" J-....f-0::-.. 1--·; -~~ 'C+ayey Sil t to Sil ty Sands ' ."" ~~ . , . ,t--" ~ 1.·Y -; -'1--- ,'I " . , . , . _ ... to , ~ : , ' ;;JIM --- " I I .. " ' ,. . • t, " " . " . .- , .. , :',' ~ '. ,~,., \ , '! 1-::" .;. '. '" '. f-".,' " 'f .' . -. " ' .~ . . .' . , ' 1-. I.. .... .. PLATE 4 , . ............. , ", '" " . i " ' ~ I _ • '1.1"- " ; " ,', , . " . , , /. . ,. ' ... .. -, , '. ... , .. .. 'i--.. .. .. . '. ~ .. .. .. • -.. . .. . .. . - ..'." ~ .. '. f .-.; .... , ''; £: