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FREEDMAN & BRUYA, INC. <br /> ENVIRONMENTAL CHEMIS'T'S <br /> Date of Report: 06/11/02 <br /> Date Received: 05/24/02 <br /> Project: 50 11.001 (Roberts Property) <br /> QUALITY ASSURANCE RESULTS FROM THE ANALYSIS OF WATER <br /> SAMPLES FOR TOTAL PETROLEUM HYDROCARBONS AS DIESEL <br /> USING EPA METHOD 8415M <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 /> Diesel µg/L(ppb) 2,500 86 81 65-135 6 <br /> Laboratory Code: Laboratory Control Sample Silica Gel <br /> Percent Percent <br /> Reporting Spike Recovery Recovery Acceptance RPD <br /> Analyte Units Level LCS _LCSD Criteria {Limit 20) <br /> Diesel µglL (ppb) 2,500 97 97 58-142 0 <br /> 35 <br />