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FRIEDMAN & BRUYA, INC. <br /> ENVIRONMENTAL 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 WATER <br /> SAMPLES FOR TOTAL PETROLEUM HYDROCARBONS AS GASOLINE <br /> USING EPA METHOD 8015M <br /> Laboratory Code: 005073-21 (Duplicate) <br /> Relative <br /> Reporting Sample Duplicate Percent Acceptance <br /> Anaivte Units Result Result Difference Criteria <br /> Gasoline WA(ppb) <50 <50 nm 0-20 <br /> Laboratory Code: 005073-23 (Duplicate) <br /> Relative <br /> Reporting Sample Duplicate Percent Acceptance <br /> Analyte Units Result Result Difference Criteria <br /> Gasoline pg/L(ppb) <50 <50 nm 0.20 <br /> Laboratory Code: Laboratory Control Sample <br /> Relative <br /> Reporting Spike %Recovery %Recovery Acceptance Percent <br /> Analyte Units Level LCS LCSD Criteria Difference <br /> Gasoline pg/L(ppb) 1,000 99 97 65.145 2 <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 /> 18 <br />