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FREEDMAN & BRUYA, INC. <br /> ENVRtONMIiNTAL CHEMISTS <br /> Date of Report: 06/07/00 <br /> Date Received: 05/17/00 <br /> Project: 6115.008 <br /> QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF SOIL SAMPLES <br /> FOR VOLATILES BY EPA METHOD 8260B <br /> Laboratory Code: 005062-08(Duplicate) <br /> Relative <br /> Reporting Sample Duplicate Percent Acceptance <br /> Analvte Units Result Result Difference Criteria <br /> Benzene µg/kg (ppb) <5 <5 am 0-20 <br /> Toluene pg/kg (ppb) <5 <5 nm 0-20 <br /> Laboratory Cade: 005062.08 (Matrix Spike) <br /> Relative <br /> Reporting Spike Sample %Recovery %Recovery Acceptance Percent <br /> Analvte Units Level Result MS MSD Criteria Difference <br /> Benzene pg/kg (ppb) 50 <5 119 110 50-150 9 <br /> Toluene µg/kg (ppb) 50 <5 118 110 50-150 7 <br /> Laboratory Code: Laboratory Control Sample <br /> Relative <br /> Reporting Spike %Recovery %Recovery Acceptance Percent <br /> Analyte Units Level LCS LCSD Criteria Difference <br /> Benzene gg/kg(ppb) 50 93 96 50-150 4 <br /> Toluene µg/kg(ppb) 50 87 94 50-150 8 <br /> nm -The anal.vte was not detected in one or more of the duplicate analyses. Therefore, calculation of <br /> the RPD is not applicable. <br /> 22 <br />