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;. . 1386 E. Beaver St <br /> WESTERN.: R=E�LGt1�EERS � 4 Rt. in eox ,7, <br /> MoodlBnd, W95695-9603 r, " <br /> REGIS78RLW cEoWGIsrs FAX 916/662-0273 3 <br /> April 22 , 1988 (.916) 662 454.1 <br /> PLAN. Ff)R 81 TL ASSESSMPNT., OLiTLIN <br /> DESERT PETROL.EW SERVICE STATIdN #787 at 950 1 1 t`h Street r Tracy.r. <br /> California , in. See 2.9.�, T2S , RSE, , MDB&M <br /> r <br /> FOR: Peter .:Allen , : WALLTON <br /> ENGINEERING* 837 Riske I,an. <br /> Sacramento , .CA 95691.., ' "West <br /> (916) 372-1888, <br /> Ref : Wa.lton . Project: .#8804 is <br /> L`.. Preliminary Plan For `'S <br /> ! ite Asaes'ment ;.. <br /> ( Extract ,flu'id from open pit left .when 3 taj'jk were <br /> U' Pump into a holding `,tank tanker truck) . <br /> 1 . to clean <br /> ".up tank: hole <br /> 2 • to .check for' recharge <br /> a:, <br /> check 'for "product in. recharge Pluiid <br /> " .. <br /> b: . if .prdu,ct ''is" found , extract; into:"hc- :ding• tank <br /> repeat, until clean <br /> B. Remove all sand and .pea { <br /> grfaWel fs2m tank hole- and reanQve <br /> native soil <br /> 1 . past `odor: or $niff,er,,reading deteatatgn•. <br /> 2 . screen soil with fruit jar' .and :.aampl.e.:sni#far <br /> 3 . when "clean" <br /> a ._ sample rnative soil .at each of the .3 t-ank '6zitesr . <br /> b theabove 3 ..samples to a cprt if ied. lab <br /> C. : install 3 mora"itor wells to 15 feet in-to 1st. water (est"iinate <br /> 26 feet : total depth) Tw.O down <br /> gradient and ona <br /> backgrou.rtd (:up gr.adit3'pt'.X `and .for "gredient.-naeasurelment.< <br /> 1 . NW corner of.,s i to (9th; & 1 1:th streets) , ,do�rn _"gradi'ent.f. <br /> 2 . NE' of : tank hoa .:(near 1.1 th. <br /> 3 . South .of . SW "pornpr of: Station: Bu�.lding , t�:ackground' <br /> 4 . Llevelop P . by pumping fluid .into"aan'ker: truck. <br /> D. When certified lab results are .back, $11ow'ini ; bottom" of tank <br /> hole is clean. <br /> 1 . Install he. tanks as previously planned. <br /> 2 . open atatian ...for business <br /> Set up. mon'a,tori,ng program ta. determine he ' remedial <br /> work is neeea::s'ar" <br /> y.. <br /> II:I. Prepare cgmple.ts site ,characterization .:and assessment <br /> if other' _remedial" .Action is . need d-' <br /> s ResFectful"13r su-#14'.it.t.ed, <br /> saG k` S",,. Nap"per <br /> Regi `Geologi t #3037 <br /> JEN/lm 4 <br />