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EXCELCHEM <br /> • ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Fax# (916) 773-4784 <br /> OA/OC REPORT <br /> Attention Vic Cherven BTEX Analyzed 07-10-96 <br /> Upgradient Environmental Matrix Water <br /> 1017 26th Street <br /> Saccramento, CA 95816 <br /> Project# 96006/Valley Motors <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB <br /> Reporting Limit 0 005 0 005 0 005 0 005 <br /> QA/QC PARAMETER <br /> Matrix Blank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Laboratory Control Spike 95% 94% 96% 95% <br /> Laboratory Control Spike 95% 94% 96% 960/a <br /> Duplicate <br /> ppb=pans per billion-ug/L-microgram per Mer <br /> ND =Not detected Compound(s)may be present at concentrations below the reporting limit. <br /> All surrogate recoveries were within 30%of target values. <br /> Spikes&Spike DupIleates were each spiked with 250 ng BTEX standard <br /> ANALYTICAL PROCEDURES <br /> BTEX—Benzene,toluene,ethylbenzene,and total xylene Isomers(BTEX)arc measured by extraction using EPA Method 5030 followed by analysis <br /> using EPA Method 602 which utilizes a gas chromatograph(GC)equipped with a photolonization detector(PID) <br /> . 07-19-96 <br /> IZTry Representative Date Reported <br /> EXCELCHEM ENVIRONMENTAL LABS IS CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (Cerh&Stwn Na 1760 2119) <br />