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*FRIEDMAN & BRUYA, INC. • <br /> ' ENVIRONMENTAL CHEMISTS <br /> Date of Report: 11/02/98 <br /> t Date Received: 10/17/98 <br /> Project: 4780.01 <br /> t 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 93 92 55-142 1 <br />