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w � '* - . _ ��� :Froject•113x13�, '����� <br /> _ <br /> 4 a <br /> Shallow groundwater measurements lndicate'ihe water table is approxini telt'r5 eet , r <br /> higher than_ineasurenien#s talcen. n. my fi995: The_flow."direction is:toward ` <br /> W <br /> j #he.wesf a=, <br /> northwestrth a gradient of abouf O Opt {l,feet:/ 1,000":feet); as shown 4nFi <br /> the .Groundwa#er CCadient Map. ; <br /> Groundwater elevations over,the:.last year.are"shown in.Chart 1 Tlie groundwater <br /> 'at the site has reached its highest Level in twa years. <br /> n <br /> MW.-1 <br /> 13% <br /> cn'12 <br /> A 1 _; h t <br /> v '=9 - ! F <br /> r wi <br /> IT <br /> July-94, January'95 Apri195 July 95 February 96 E, <br /> _,2Chant .I.- Groundwater:.Elevation,�Measurements <br /> Each,monitoring well,was purged usung,asubmersible 'electric pum _p rioto <br /> sampling. At least-12. were.remo'Ved'froni'each'.well,at Ieast'six,,well n� I <br /> i'volumes per'well, After each well was;p.urged,-a sample was taken using a teflon' -,€ <br /> bailer. The water from:each well was placed in-'two 40-milliliter,vials',filled so that : a� <br /> there.was no.air.(head space) remaining,in lheM.,Samples'were labeled and placed ; <br /> on.ice in a cooier,:for transport to a.state.eerft fled-hazardous materlais nestling ', <br /> laboratory, WCampbell-Analytical'of Pacheeo California. k <br /> The .pump and electronic water'level meter.were.cleaned.in.one bucket'.with TSP <br /> =-(trisodium-phosphate)•and two separaie'buckets with tap water'after being used for a <br /> :each well. The'bailer was cleaned in the'`TSP. solution,.rinsed two ties in.'tap water, ;4 <br /> ..-and rinsed.with distilled.water between each use. All purge;water and.equipment <br /> wash water was placed in 55=gallon steel drums and remains on-site. Copies of-the. <br /> -Water Sample Data Forms are attachedto this report. <br /> The samples were analyzed for TPH-•gasoline,MTBE and-BT-EX using EPA Methods ' <br /> 5030/8015 modified; and 602. A copy of'the laboratory report and Chain of Custody <br /> ` form are attached to this report. <br /> Parker Environmental Services 1901.East 7th Street Pittsburg CA94565-6116 <br /> Phone (510)_ 439-1024 Far .(510) 439-2566 <br />