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• i <br /> 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/OC REPORT <br /> Attention Mr Vic Cherven MBTEX Analyzed 02-22-96 <br /> UPGRADIENT ENVIRONMENTAL Matrix Water <br /> 1017 26th Street <br /> Sacramento, CA 95618 <br /> Project 96013 <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes MTBE <br /> PPB PPB PPB PPB PPB <br /> Reporting Limit 0 5 0 5 0 5 0 5 05 <br /> QA/QC PARAMETER <br /> Matrix Blank ND ND ND ND ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 98% 97% 98% 98% 94% <br /> Matrix Spike 100% 100% 100% 99% 98% <br /> Duplicate <br /> ppb=parts per billion=ug/L=microgram per liter <br /> ND =Not detected Compounds)may be present at concentrations below the reporting hrrnt <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 602 which utilizes a gas i.hmmatograph(GC)equipped with a photoionization detector(PID) <br /> MTBE (Mcthyl Tert-Butyl Ether)--MTBE is analyzed by EPA Method 602 which utilizes a gas chromatograph (GC) equipped with a <br /> photmomzation detector(PID) <br /> 02-26-96 <br /> (ftLaratory Representative Date Reported <br /> EXCELCHEM ENVIRONMENTAL LABS 15 CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (Certifficahon No 1760) <br />