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FRIEDMAN & BRUYA, INC. <br /> ENVIRONMENTAL CHEMISTS <br /> Date of Report: 11/26/97 <br /> Date Received: 11/22/97 <br /> Project: 4440 <br /> QUALITY ASSURANCE RESULTS <br /> FOR THE ANALYSIS OF SOIL SAMPLES FOR TOTAL EXTRACTABLE <br /> PETROLEUM HYDROCARBONS BY GC/FID (MODIFIED 8015) <br /> Laboratory Code: 711089-04(Duplicate) <br /> Relative <br /> Reporting Sample Duplicate Percent Acceptance <br /> Analyte Units Result Result Difference Criteria <br /> Crude Oil µg/g(ppm) <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 /> Crude Oil µg/g(ppm) 125 97 104 62-140 7 <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 /> 20 <br />