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RIEDNLAN & BRUYAF1 , INC. <br /> ENVIRONMENTAL CHEMISTS <br /> F <br /> Date of Report: May 3, 1996 <br /> Date Received: April 29, 1996 <br /> F Project: C3499B <br /> QUALITY ASSURANCE RESULTS <br /> FOR THE ANALYSIS OF WATER SAMPLES FOR BENZENE, TOLUENE, <br /> ETHYLBENZENE,XYLENES AND GASOLINE <br /> . USING EPA METHODS 8020 AND 8015 <br /> Laboratory Code: 68425 (Duplicate) <br /> Relative <br /> fil Reporting Sample Duplicate Percent Acceptance <br /> Analyte: Units Result Result Difference Criteria <br /> FBenzene 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 /> F Gasoline ug/L (ppb) <50 <50 nm 0-20 <br /> FLaboratory Code: Spike Blank <br /> Relative <br /> Reporting Spike % Recovery Acceptance Percent <br /> F. Analyte: Units Level MS MSD Criteria _Differenge <br /> Benzene ug/L,(ppb) 100 98 95 79-113 3 <br /> Toluene ug/L (ppb) 100 100 97 77-117 :3 <br /> Ethylbenzene ug/L (ppb) 100 99 98 77-121 1 <br /> Xylenes ug/L (ppb) :300 100 98 79-123 2 <br /> Gasoline ug/L (ppb) 1,000 97 100 80-129 :3 <br /> r <br /> r nm -The analyte was not detected in one or more of the duplicate analyses. Therefore, calculation of the <br /> RPD is not applicable. <br /> PF <br /> w <br /> F))! <br /> F <br /> t . <br />