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FRIEDMAN & BRUYA, INC. <br /> ' ENVIRONMEN'TAL CIMMISTS <br /> Date of Report: 09/28/99 <br /> ' Date Received: 09/24/99 <br /> Project: 5650 <br /> QUALITY ASSURANCE RESULTSFOR THE ANALYSIS OF SOIL SAMPLES <br /> FOR TOTAL PETROLEUM HYDROCARBONS AS GASOLINE <br /> USING EPA METHOD 8015M <br /> ' Laboratory Code: 909106-01 (Duplicate) <br /> Relative <br /> Reporting Sample Duplicate Percent Acceptance <br /> ' Analyte Units Result Result Difference Criteria <br /> Gasoline µg/g (ppm) <1 <1 nm 0-20 <br /> Laboratory Code: 909106-09 (Duplicate) <br /> Relative <br /> ' Reporting Sample Duplicate Percent Acceptance <br /> Analyte Units Result Result Difference Criteria <br /> Gasoline µg/g (ppm) <1 <1 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 µg/g (ppm) 10 96 98 68-112 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 /> ' 34 <br />