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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: Equiva ServiLes Service Request: K9904880 <br /> Project: huident# 88870583/SAP#121258 Date Collected: NA 40 <br /> LCS Matrix Water Date Received: NA <br /> Date Extracted: NA <br /> Date Analyzed 7/29/99 <br /> Laboratory Control Sample Summary <br /> Volatile Organic Compounds <br /> Sample Name Lab Control Sample Units ug/L(ppb) <br /> Lab Code K990727-LCS Basis NA <br /> Test Notes <br /> CAS <br /> Percent <br /> Recovery <br /> Prep Analysis True Percent Acceptance Result <br /> Analyte Method Method Value Result Recovery Limits Notes <br /> I,1-Dichloroethene EPA 5030B 8260B 10 66 66 62-148 <br /> Benzene EPA 5030E 8260B 10 82 82 77-114 <br /> Trichloroethene(TCE) EPA 5030B 8260B 10 80 80 69-124 <br /> Toluene EPA 5030B 8260B I0 8 5 85 75-118 <br /> Chlorobenzene EPA 5030B 8260B 10 88 88 79-110 <br /> 1,2-Dichlorobenzene EPA 5030B 8260B 10 89 89 80-108 <br /> Naphthalene EPA 5030B 8260B 10 9 2 92 64-125 <br /> G <br /> Approved By Date <br /> LCSV52595 <br /> Page 41 <br />