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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 Jahn Bower BTEX Analyzed 02-07-98 <br /> Secor Matrix Water <br /> 1787 Tribute Rd , Ste C <br /> Sacramento, CA 95815 <br /> Project 7G 005-001-01/Time Oil <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB <br /> ReportinE Linut 0 5 0 5 05 0 5 <br /> QA/QC PARAMETER <br /> Matrix Blank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Laboratory Control Spike 101% 102% 104% 105% <br /> Laboratory Control Spike 103% 104% 104% 105% <br /> DupliLate <br /> ppb=pans per billion=uglL=microgram per hter <br /> ND =Not detected Compound(s)may be present at concentrations below the reporting hmrt <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 chromatograph(GC)equipped with a photoionization detector(PID) <br /> 02-12-98 <br /> b ratory keTliesentative Date Reported <br /> EXCELCHEM FNVIRONMENTAL LABS IS CERTIFIED BY THE STATE OF CALIFORNIA <br /> nEPARTM1IENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (Cera flmtion No 2119) <br /> 5 <br />