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rFRIEDMAN & BRUYA, INC. <br /> J ENVIRONMENTAL CHEMISTS <br /> Date of Report: April 12, 1996 <br /> Date Received: April 10, 1996 <br /> Project: C3499B <br /> r QUALITY ASSURANCE RESULTS <br /> t. . FOR THE ANALYSIS OF WATER SAMPLES FOR BENZENE, TOLUENE, <br /> ETHYLBENZENE, GASOLINE,AND PURGEABLE CRUDE <br /> USING EPA METHODS 8020 AND 8015 <br /> Samples Processed Using Method 5030 <br /> Laboratory Code: 67803 (Duplicate) <br /> Relative <br /> Reporting Sample Duplicate Percent Acceptance <br /> Analyte: Units Result ---Result Differences Qriteria <br /> Benzene ug/L(ppb) <0.5 <0.5 nm 0.20 <br /> Toluene ug/L(ppb) <0.5 <0.5 nm 0-20 <br /> Ethylbenzene ug/L(ppb) <0.5 <0.5 nm 0-20 <br /> Xylenes ug/L (ppb) <0.5 <0.5 nm 0-20 <br /> Gasoline ug/L (ppb) <50 <50 nm 0-20 <br /> Crude ug/L (ppb) <250 <250 nm 0-20 <br /> Laboratory Code: Spike Blank <br /> Relative <br /> Reporting Spike % Recovery Acceptance Percent <br /> Analyte: Units Level MS MSD Criteria Difference <br /> Benzene ug/L (ppb) 100 102 104 79-113 2 <br /> Toluene ug/L (ppb) 100 103 106 77-117 3 <br /> Ethylbenzene ug/L (ppb) 100 103 106 77.121 3 <br /> Xylenes ug/L (ppb) 300 103 106 79-123 3 <br /> Gasoline ug/L (ppb) 1,000 108 104 80.129 4 <br /> Louisiana Crude ug/L (ppb) 2,500 . 85 84 80-129a 1 <br /> nm - The analyte was not detected in one or more of the duplicate analyses. Therefore, calculation of the <br /> RPD is not applicable. <br /> a - Acceptance criteria not established for purgeable crude. Gasoline criteria used as a default. <br /> �r <br />