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• <br />07/14100 FRI 17 00 FAX 1 916 881 0430 SECOR-SACRAMENTO �i003 <br />Scumd Querw ?ALIO Prc+RdSO Rehr July t#, 2000 <br />Fom "Clemm K9-5775, (r_AO 05.00.7041 381 Weal Kctdmnen Lam t adl. CA <br />QUARTERLY RESSUMMARY:LTS SUMMARY: <br />Cunrnt Phase of Project. Rrxnediat+on <br />Frequency of Groundwater Samplrrtg -22m* <br />— <br />Frequency of Gmandwater Moadoring Quarterly . . <br />Is Free Product (FP) Present On -S tie No <br />Current PemedWL01t Techniques GWE 1 SVE <br />Appmxtmate Depth to Shallow Groundwater 53.30' to SUT <br />GroundwaterGm&ent Ruthwest @ 0003 Wft <br />DISCUSSION: <br />On April 12, 2000. Gettler-Ryan Inc (GR) advanced ten (10) Geoprobe borings to collect cornpastte samPles to be <br />excavabon at the site On May Band 9, 2000, any mdmetely 900 cubic yards <br />tlSGd t4 profile SOtL �d Burin$ <br />(ydsa) o'fexcavated soil were removed to a Indfill in Livermore, CA_ <br />Between AFnt 6 and June 5, 2000, GR =tracted groundwater Rain well EX -1 for aRproxttnsteiy I�horrts per day on <br />a weeLly basis Approximately 2,635 gallons of water were removed during this pepnod Analytical results are <br />presented in Attarhmettt A <br />`iiru. groundwater rnanrtoritsB arld plmg event was pmfmmcd by CrR on May 25.2000 TPHS was reported to <br />• 90 <br />four (4) of the 9=(10) Chevron .wells sampled this quarter at eonces tratron s nrrtgutg from 162 {MWS) to I <br />ue (MV_3) Benzene wits reported to six (6) wells sa VIOd taus quarter at ccummtratior►s ranging fruxtt 4 611 <br />(MW -I) to 19,000 ugll (,EX -1) Mti3E was reported in seven (7) wells at mcergratLons ranging from 8 28 (MW -3) <br />to 35Q,000 ugfl (EX -1). <br />Tm concentration of TFTrIA m lw-5 increased from below analytical Mection ltmrts to 1,140 ugil this quarter. <br />Cancentattons of MtBE in MSV --5 inorewnd f mrr 474 ugll from the previously reporbed lave! of 83 ug/l The <br />coricenbramns of 11ME le EX -1, MW-6MW <br />, -� and MW MW -4 dxgeased taus quarWr to 350,0oO uO, 378W A, beiew <br />deu ctron limits, and 53 4 uglt mat►relY- G tO"5 s the site 1st Hi i�tasod an aver sof <br />�praximately 0 4 % ter, <br />et this pain, Groundw�r How direction was to the soutfntret ical greiinda`ater ' <br />has vtmed from southeasterly to mOmmsk2lY <br />The iRAR lation of the groundwater and soil vapor mdr=tjon and treatment system began an .Tune 5, 2000 The <br />system became upsndm ml on July 3, 2000 <br />CFC <br />Groundwater monoxing wells MW -5B, MW -8B, TOW -10B, MW -1211, MW -128, MW -13, and MW -14 thewPrnb ► <br />titsWled durutg June and July 2000 Data collected during this assessment will be reported pact <br />Assessment Report (PATI) <br />