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I <br /> EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> -� <br /> 500 Giuseppe Court, Suite 9 <br /> Roseville, CA 95678 <br /> Phone#: (916) 773-3664 Fax#: (916) 7734784 <br /> >1 <br /> QA/OC REPORT <br /> Attention: 114r. John Bower BTEX Analyzed : 08-09-96 <br /> SECOR Matrix: Water ' <br /> 1787 Tribute Road, Suite C <br /> Sacramento, CA 95815 =' <br /> Project: Jo710-001-01 <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB <br /> Reporting Limit: 0.5 0.5 0.5 0.5 F <br /> QA/QCPARA1VETER <br /> Matrix Blank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 93% 90% 89% w 86% <br /> Matrix Spike 89% 88% 88% 87% <br /> Duplicate <br /> ppb-parts per billion=ug/L=microgram per lila '-. <br /> ND =Not ddectod Compound(s)may be present at concentrations below the reporting limit. <br /> All surrogate recoveries were within 30%of target values. <br /> Splices&Spare Duplicates were each spliced with 250 n=BTEX standard. € - <br /> ANALYTICAL PROCEDURES <br /> BTEX—Benzene,toluene,ethylbnvene,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 photoioni7ation detector(PID). = <br /> 08-09-96 <br /> tory Representative Date Reported <br /> E1cCUCMU UMM3(MENTAL LAM is CER TRM aY THE STATE OF CAUFOMM G <br /> DEPARIMFNPOFHEALTmSERVICESASAFA ARDOUSWASTETEsmGLAHORATORY <br /> tce li'icauon KLIMO.211 <br />