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t - FRIEDMAN &BRUYA, INC. <br /> ' ENVIRONMENTAL CHEMISTS <br /> • Date of Report: 09/28/99 <br /> Date Received: 09/24/99 <br /> Project: 5650 <br /> QUALITY ASSURANCE OSAMPLES <br /> FOR TOTAL <br /> PETROLEUM HYDROCARBONS AS DIESEL <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 /> Diesel µg/g (ppm) 22 55 86 a 0-20 <br /> Laboratory Code: 909106-04 (Matrix Spike) <br /> Relative <br /> ' Reporting Spike Sample % Recovery % Recovery Acceptance Percent <br /> Analyte Units Level Result MS MSD Criteria Difference <br /> Diesel µg/g (ppm) 500 22 106 91 41-170 15 <br /> Laboratory Code: Laboratory Control Sample <br /> Relative <br /> Reporting Spike % Recovery %Recovery Acceptance Percent <br /> Analyte Units Level LCS LCSD Criteria Difference <br /> ' Diesel 4g/g (ppm) 500 112 100 59-138 11 <br /> a - The analyte was detected at a level less than five tunes the detection limit. The RPD results may <br /> not provide reliable information on the variability of the analysis. <br /> 1 <br /> • <br /> ' 37 <br />