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FRIEDMAN & BRUYA, INC. <br /> ENVIRONMENTAL CHEMISTS <br /> Date of Report: 11/26/97 <br /> Date Received: 11/22/97 <br /> Project: 4440 <br /> QUALITY ASSURANCE RESULTS <br /> FOR THE ANALYSIS OF WATER SAMPLES FOR BTEX AND <br /> METHYL-T-BUTYL ETHER (MTBE) USING EPA METHOD 8260 <br /> Laboratory Code: Laboratory Control Sample <br /> Analyte Reporting Spike % Recovery % Recovery Acceptance <br /> Units Level LCS LCSD Criteria RPD <br /> Benzene pg/14pb) 50 91 94 91-109 3 <br /> Toluene pg/L(ppb) 50 92 98 86.109 6 <br /> MTBE pg/L(ppb) 50 103 10:3 65.135 0 <br /> 23 <br />