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FREEDMAN & BRUYA, INC. <br /> ENVIRONMENTAL CHEMISTS <br /> Date of Report: 11/01/00 <br /> Date Received: 10/17/00 <br /> Project: 6447.003 <br /> QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF SOIL SAMPLES <br /> FOR VOLATILES BY EPA METHOD 8260B <br /> - Laboratory Code: 010090.05-(Duplicate) - <br /> Relative <br /> Reporting Sample Duplicate Percent Acceptance <br /> Analyte Units Result Result Difference Criteria <br /> Benzene pg/g (ppm) <0.005 <0.005 nm 0-20 <br /> Toluene gg/g (ppm) • <0.005 <0.005 nm 0.20 <br /> Laboratory Code: 010090-05 (Matrix Spike) <br /> Relative <br /> Reporting Spike Sample %Recovery %Recovery Acceptance Percent <br /> Analyte Units Level Result MS MSD Criteria Difference <br /> Benzene pg/g (ppm) 0.05 <0.005 82 90 50-150 9 <br /> Toluene pg/g(ppm) 0.05 <0.005 74 86 50-150 15 <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 pg/g (ppm) 0.05 83 87 50.150 6 <br /> Toluene pg/g (ppm) 0.05 73 77 50.150 5 <br /> nm -The analyte was not detected in one or more of the duplicate analyses. Therefore,calculation of <br /> the RPD is not applicable. <br /> 22 <br />