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FRIEDMAN& BRUYA, INC. <br /> ENVIRONMENTAL CHEMISTS <br /> Date of Report: 12/13/02 <br /> Date Received: 11/27/02 <br /> ' Project: 2463.002 <br /> ' QUALITYAS,SURANCE RESULTS FOR THE ANALYSIS OF WATER <br /> SAMPLES FOR BENZENE, TOLUENE, ETHYLBENZENE, <br /> USINGENES AND TPH AS GASOLINE <br /> EPA METHODS 8021B AND 8015M <br /> ' Laboratory Code: 211207-01 <br /> (Duplicate) <br /> Reporting Relative Percent <br /> An e g Sample Duplicate Difference <br /> ' Units Result Result <br /> Benzene unit 20 <br /> µg/L (ppb) <0.5 <br /> Toluene <0.5 nm <br /> Ethylbenzene 4a (ppb) <0.5 <0.5 nn <br /> Xylenes lg/L (Ppb) <0.5 <0.5 nm <br /> Gasoline off' (Ppb) <0.5 <0.5 <br /> Ng/L (Ppb) <5p nm <br /> <50 nm <br /> Laboratory Code: Laboratory Control Sample <br /> Percent Percent <br /> Reporting Spike Recovery Recovery Acceptance <br /> Anal to Units Level LCS LCSD� RPD <br /> Benzene Criteria unit 20) <br /> Toluene 49/1- (ppb) 25 103 96 71.117 7 <br />' Ethylbenzene FLa (PPb) 25 105 97 71-119 8 <br /> Xylenes <br /> 992 (ppb) 25 106 99 67.125 <br /> Gasoline 4a (ppb) 75 102 96 6 <br /> µg/L (ppb) 1,000 97 66-127 <br /> 96 62-120 1 <br /> nm - The analyte was not detected in one or more of the duplicate analyses. Therefore, <br />' the RPD is not applicable. calculation of <br /> I <br /> I <br /> I <br /> I� <br /> RECE9V E D <br /> 16 JAN 2 1 2003 <br />