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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 /> QA/QC REPORT <br /> Attention Mr Vic Cherven MBTEX Analyzed 02-23-96 <br /> UPGRADIENT ENVIRONMENTAL Matrix Soil <br /> 1017 26th Street <br /> Sacramento, CA 95618 <br /> Project 96013 <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes MTBE <br /> PPM PPM PPM PPM PPM <br /> Reporting Linut 0 005 0 005 0 005 0 005 0 005 <br /> QA/QC PARAMETER <br /> Matnx Blank ND ND ND ND ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 93% 93% 93% 93% 89% <br /> Matrix Spike 97% 97% 98% 98% 101% <br /> Duplicate <br /> ppm=parts per million=mg/Kg=milligram per kilogram <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 Duplicates were each spiked with 250 ng BTEX standard <br /> ANALYTICAL PROCEDURES <br /> BTEX--Benzene toluene ethylbenzene and total xylene isomers(BTEX)are measured by extraction using EPA Method 5030 followed by analysis <br /> using EPA Method 8020 whti-h unlrzes a gas chromatograph(GC)equipped with a phototonization detector(Pm) <br /> MTBE (Methvl Tert-Butyl Ether)--MTBE is analyzed by EPA Method 8020 which utilizes a gas chrumatogmph (GC) equipped with a <br /> photoiomzatron detector(PID) <br /> 02-26-96 <br /> (abo atoryRepresentative Date Reported <br /> i <br /> EXCELCHEM ENVIRONMENTAL LABS IS CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (Certification No 1760) <br />