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FRIEDMAN & BRUYA, INC. <br /> ENVIRONMENTAL CHEMISTS <br /> Date of Report: 06/11/02 <br /> Date Received: 05/23/02 <br /> Project: 6447.001 (US Can) <br /> QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF WATER <br /> SAMPLES FOR BENZENE,TOLUENE, ETHYLBENZENE, <br /> XYLENES AND TPH AS GASOLINE <br /> USING EPA METHODS 8021E AND 8015M <br /> Laboratory Code: 205192-21 (Duplicate) ! <br /> Relative Percent <br /> Reporting Sample — Duplicate Difference <br /> Analyte Units Result Result (Limit 20) <br /> Benzene µg/L (ppb) <0.5 <0.5 nm <br /> Toluene µg/L (ppb) <0.5 <0.5 nm <br /> Ethylbenzene µg/L (ppb) <0.5 <0.5 nm <br /> Xylenes µg/L (ppb) <0.5 <0.5 nm <br /> Gasoline gg/L (ppb) <50 <50 nm <br /> Laboratory Code: Laboratory Control Sample <br /> Percent Percent <br /> Reporting Spike Recovery Recovery Acceptance RPD <br /> Analyte Units Level LCS LCSD Criteria (Limit 20) <br /> Gasoline µg/L (ppb) 1,000 94 94 58-132 0 <br /> Laboratory Code: Laboratory Control Sample <br /> Percent Percent <br /> Reporting Spike Recovery Recovery Acceptance RPD <br /> Analyte _ Units Level LCS LCSD Criteria (Limit 20) <br /> Benzene µg/L (ppb) 25 105 105 66-119 0 <br /> Toluene µg/L (ppb) 25 102 103 65-119 1 <br /> Ethylbenzene gg/L (ppb) 25 104 105 62-125 1 <br /> Xylenes gg/L (ppb) 75 101 105 65-123 1 <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 /> I <br /> 27 <br />