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Determination of the Direction of Groundwater Flow <br /> and - <br /> F1ow Rate <br /> at -the Y <br /> Pestana Trust Fro:perty <br /> 2:75. Grant Lin e :.Road,_ Tracy, CA_ <br /> A transit survey was: performed, at-:the subject site to <br /> .dete'r' mine. the relative. elevations .of: the welT ':heads ' of the <br /> three groundwater mon tor-in.g `.w.e11s ._at._ the . subject site . <br /> The - purpose. of- .t-he survey was to determine :the . daiectkon of <br /> .g=r�oundw;ate3r. f1`.ow Light`;_ non-aqueous phase. Liquids <br /> (LNAPLs)- have_:been--detected in s-ha1:1 ow . gr.oundwa-te-r -at- .the <br /> si-t-e -and may -be,migrating as -a. '-plume; as. wet 1 as dissolving <in- the water,, and vol:ati Ii-zing : <br /> -The : flow of water in a _sat.u°rated porous medium-such as soil <br /> .is: defined by`-Dar.cy`'s-.Law. - __Thi s. a,aw states ghat. under <br /> saturated-conditions , the volume ofxwater flowing: per . unit <br /> area, per uni'tJ time At=v <br /> is: dir ' tlx proportional t-o <br /> :'the! product of'-hydraul c- cond uct i v,i tY.: (R) 'of` that soil and <br /> the 'h <br /> ydraul i c. <br /> gradient h/-L)-, - <br /> f - , v=K h/-L,. <br /> Measurements ac-quired--at t-he-site ,during . the past.-three <br /> quarterly monitoring. events -appear in- Tables 1�, .2 , .and 3 : <br /> Table 1 4 . <br /> I Well Head Elevations -and,,Depth to---Groundwater at- 275 Grant <br /> a. <br /> Line, Road, .'T..r.acy, CA, November-- 23; 19193 <br /> We11._ Head Depth- to- Relative- Groundwater <br /> Wel i Elevat,iori* -- Groundwat.er. .: Elevations <br /> Number (.ft) (f1.) = (ft ) <br /> MW-1 -60 .51. 8 . 10. 5.2 . 41 x <br /> MW.-.2 5 9 40 7. 10. 52 --30 <br /> MW-3 60 .05' _ .. 7_. 55: . .52 . 49 <br /> r <br /> "*Well ..head elevat*ons wer=e det:e•rmined. -with- respect to an <br /> arbitrary datum; establ=ished. a°t -the edge of -a concrete <br /> j <br />