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EXCELCHEIV[ <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 <br /> Roseville, CA 95678 <br /> Phone#- (916) 773-3664 Fax#: (916) 773-4784 14 <br /> QA/QC REPORT <br /> Attention N r John Bower BTEX Analyzed 05-29-96 <br /> SECOR Matrix Water <br /> 1734 34th Street <br /> Sacramento, CA 95816-7004 <br /> Project Time Oil -Lockeford <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB <br /> Reporting Limit 05 0 5 05 05 <br /> • QA/QC PARAMETER <br /> Matrix Blank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Laboratory Control Spike 106% 110% 115% 115% <br /> Laboratory Control Spike 102% 100% 104% 105% <br /> Duplicate <br /> ppb=pans per billion=ug/L=microgram per liter <br /> ND =Not detected Compound(s)may be present at concentrations below the rcportmg Amit <br /> AA surrogate recoveries were within 30%of target values. <br /> Splices&Spike Duplicates were each spliced with 250 ng BTEX standard <br /> ANALYTICAL PROCEDURES <br /> BTEX--Benzene,toluene,ethylbcnzene,and total xylene isomers(BTEX)are measured by extraction using EPA Method 5030 followed by analyses <br /> using EPA Method 602 which utilizes a gas chromatograph(GC)equipped with a photolonezateon detector(PID) <br /> . 05-30-96 <br /> ory Representative Date Reported <br /> CaMCHEM ENVIRONMENTAL LAGS IS C ERTTIED By THE STATE OF CAUrOiNLA <br /> DEPARTMENT OF HEALTH SERVICES AS A KAZARDOU S wASTE TESTING LABORATORY <br /> ICeStfc�t.on Na 176[tl <br />