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EXC E LCH E M <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Pax# (916) 773-4784 <br /> OA/OC REPORT <br /> Attention Matthew Taylor Date Analyzed 111-18-97 <br /> Wallace-Kuhl & Associates Matrix Water <br /> 3050 Industrial Blvd <br /> West Sacramento, CA 95691 <br /> Project 2938 03/1444 Mariposa <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB <br /> Reporting Limit 0 5 0 5 0 5 0 5 <br /> • _ <br /> QA/QC PARAMETER <br /> Matrix Blank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 102% 102% 101% 101% <br /> Matnx Spike 104% 104% 103% 102% <br /> Duplicate <br /> ppb=parts per billion=uglL=microgram per liter <br /> ND =Not detected Compound(s)may be present at concentrations below the reporting lurut <br /> All surrogate recoveries were within 30%of target values. <br /> Spikes&Spike Duplicates were each spiked with 250 ng BTEX standard. <br /> ANALYTICAL PROCEDURES <br /> BTEX--Benzene,toluene ethylbenrene and total xylene isomers(BTEX)ate measured by euraction using EPA Method 5030 followed by analysts <br /> using EPA Method 602 which utilizes a gas chromatograph(GC)equipped with a photoionization detector(PID) <br /> a <br /> 12-01-97 <br /> Ttory Representative Date Reported <br /> EXC.ELC1irM ENVMONMENTAL t ADS I5 CERTIFIED BY THF STATP OF CALtf OMA ' <br /> DEPARTMENT OF IIEALTH SERVICES AS A HAZARDOUS WASIT TESTING LABORATORY <br /> (Cartif cation No 2119) t <br /> 6 <br />