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' FRIEDN4AN & BRUYA, INC. <br /> ENVIRONMENTAL CHEMISTS <br /> • Date of Report: 09/28/99 <br /> Date Received: 09/24/99 <br /> Project: 5650 <br /> QUALITY ASSURANCE RESULTS FROM THE ANALYSIS OF SOIL SAMPLES <br /> FOR TOTAL PETROLEUM HYDROCARBONS AS CRUDE <br /> USING EPA METHOD 8015M <br /> Laboratory Code: 909106-04 (Duplicate) <br /> Relative <br /> Reporting Sample Duplicate Percent Acceptance <br /> Analyte Units Result Result Difference Criteria <br /> Crude µg/g (ppm) <50 107 nm 0-20 <br /> Laboratory Code: 909106-12 (Matrix Spike) <br /> Relative <br /> Reporting Spike Sample % Recovery % Recovery Acceptance Percent <br /> Analyte Units Level Result MS MSD Criteria Difference <br /> Crude µg/g (ppm) 500 <50 109 100 41-170 9 <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 µg/g (ppm) 500 113 115 59-138 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 /> • <br /> ' 38 <br />