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FRIEDMAN & BRUYA, INC. <br /> ENVIRONMENTAL CHEMISTS <br /> Date of Report: 07/24/98 <br /> ' Date Received: 07/10/98 <br /> Project: 4780 <br /> ' QUALITY ASSURANCE RESULTS <br /> FOR THE ANALYSIS OF WATER SAMPLES FOR TOTAL EXTRACTABLE <br /> ' PETROLEUM HYDROCARBONS BY GC/FID (MODIFIED 8015) <br /> ' Laboratory Code: Laboratory Control Sample Silica <br /> Relative <br /> Reporting Spike %Recovery %Recovery Acceptance Percent <br /> Analyte Units Level LCS LCSD Criteria Difference <br /> Diesel µg/L (ppb) 2,500 84 86 55-142 2 <br /> Laboratory Code: Laboratory Control Sample Silica Filtered <br /> Relative <br /> Reporting Spike %Recovery %Recovery Acceptance Percent <br /> ' Analyte Units Level LCS LCSD Criteria Difference <br /> Diesel n/L(ppb) 2,500 109 92 55-142 17 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br />