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<br /> "� J2 3: HYDROLOGIC UNITS r '�'_w� ` FI
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<br /> .jFq.. 7 Based-on:the CPT results and comparison-with soil des'cnptions from bor ngs�previousiy advanced _ ,"
<br /> � on -the site,=AGE has: developed a prelimmarysub"surface-model�of the-site}soil Stratigraphy ,,, _
<br /> ` ,: corrl nsed of 'ten -ii formal,.zones, a vadose. unsaturated zorl and nine h''drolo Ical`units s.'-F ,
<br /> -� Hydrological uriits:may be.defined as significant vertical Intervals of soil.having'significant IatL.e�ral _ t t.
<br /> ..,Y extent and having.similar hydrologic characteristics(i e.hydraulic conductivity,tran`smi5sivity,:etc ) - 3,
<br /> " - over Its=°vertical and`horizontal-extent Based on geologic eross.:sectiEE"iori�C C� (Figure3); AGE hr ..t
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<br /> - -„ informay ide1 .m fied.nine hydrogeolo c units beff, , " 5 feet_and 1:SO feet bsg as haviiig-signtficant"- `-
<br /> 4 ' intervals`of apparently.poroils to semi porous grained soil separated by sIg1llficantintervals of filler , _
<br /> � ' ' ' ', -. '- i. -+-d« h � _`� fit' s�-1'PS'-'-'E'•+ fit,
<br /> ' grained, less perrrleable loll = 3 - = �� els � -
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<br /> 'ic e+' ;P '..- -- '� �, _ ._ -�c -�• rs'-7�` F 'et''` yfit �`r �'r , va,.; `�. r
<br /> r.11 Imo - _.. �+= `r - .' ' _� t. t-� ,u� �' ._'• f e �. '�' , swx y v ,�• _ .�s''-.
<br /> L•, �,_ .. The model;presented=is interpretat onal�and will be modified as amore data Is collected.LXT e ten
<br /> ._ J._ *1-vertical zones identified=are as follows {depths-are approxltnate and=can vary by Several feet,across i }`
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<br /> 5 the'site) _ "` _ t ' ;ft � �r -__}_ ' rte-- ;_e'" -�, A- L�r�..."€ .$`'F;;z' .��..� - �'' a 5 -x. x:_, �3ky � ,. = 3
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<br /> . 49F , ,� _;Vadose Zone(VL) Located-between surface grade and 25 feet bsgand characterized,_ low _ !u
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<br /> j. -� to=moderate pore pressure, comprised .prim% artiy by fine grained {silt and clay) mater- _,
<br /> y " aI ho ij4i ne to medium grained iiiatenal{sand and s11ty�salad)occur's locallybetween 10 and ._.—A—.,.
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<br /> 1 -kms""` Zj"rt = r
<br /> 20 feet bsg _ - , - ;7
<br /> a = � � 1s-3 - � -,`�� * te a s� ` .R. _ a �' a A4 r
<br /> ,, � � , Hydrologic-Unit-1 (HUI) -Located between 25 feet-and 38 feet 1isg an cli acterized by . .-
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<br /> :fluctuating low to higklpose-:pressures,comprised prim_an:y by semi-permeable silty sand ander ` `.
<br /> -,., - L- �-sandy silt although_coarse gramed,sand occurs`-locally �►_ U. � _
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<br /> x •s H drolo ac Unit 2' U2 Located'between 38 feet and 64 feet bs and cliaractenzed b low 3
<br /> .� " 7, "pore pressures'altliough high porepressures were Encountered atVappxoxirnately 48 feet to k `
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<br /> - -, y k 51 _feet bsg, coinprlsed prirnanly by pelineable;fine to medium sand'with gravel kalthough-1. 3
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<br /> z �_ - fine grained•silty clay/clayslIt occurs locally �jlq: -`_ .. �,
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<br /> 4 ` .,• Hydrologic Unit 3-(HU3) ,Located between 64 feet and 75_, feet bsg and characterized by 11 r' ` = x
<br /> T_ °' �`. ' fluctuating law-to}moderate pore°:.pressures-and localized high pore pressures, comprised � -� `-.i
<br /> 1'i ::i. - R `< _ - - S - vC��.. _ _y..:1E 11 �''I=74 - �, _- { :•y R'.._n
<br /> t_ primarily by_laterally continuous, Semi piermeable silty sand,and sandy silt, -: �;
<br /> � .- . . . - -,-, -,;:XL!C.. .- - . �'t, - .1� �- .,;V- -w 1 77F -_. --U.-
<br /> a "' Hydrologcc Unit 4 (HU4) -Located between�75Zeet.�and 95, feet bsg I'�arid chara4.
<br /> cterized by � _
<br /> fluctuating low to:high pore,pressures`aa d laierally'continuotis high pore'pressures between ,
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<br /> ;; 92 and 94 feet bsg, comprised pn�irlanlyby less perirleable;laterally continuous silty clay and
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<br /> -''-`'tT -' n gr -- ---'+- r _-• - _,_,a, -S t _ -,PF�» -= '14,x' ' ..-�'g- °""-4
<br /> x ..z i * ZHydrologic UniS-(HI15) ,_`Located between 95 feet=and 100 feet Usgifand charactexnzed by e
<br /> - variable Aloes$to high°;gore pressures, comprised prlrnanly by jlaterally continuous semi A`�! -
<br /> permeable silty sand and sandy silty ' �� — e �' � '-- 4-4,
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