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FRIEDMAN & BRUYA, INC. <br /> ENVIRONMENTAL CHEMISTS <br /> Date of Report: October 24, 1996 <br /> Date Received: October 17, 1996 <br /> Project: King Island <br /> QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF SOIL SAMPLES FOR <br /> BENZENE,TOLUENE, ETHYLBENZENE,XYLENES AND GASOLINE <br /> USING EPA METHODS 8020 AND 8015 <br /> Laboratory Code: 73404(Duplicate) <br /> Relative <br /> Reporting Sample Duplicate Percent Acceptance <br /> Analyte Units Result Result Difference Criteria <br /> Benzene µg/g(ppm) <0.02 <0.02 nm 0-20 <br /> Toluene µg/g(ppm) <0.02 <0.02 nm 0-20 <br /> Ethylbenzene nig(ppm) <0.02 <0.02 nm 0-20 <br /> Xylenes µg/g(ppm) 0.08 0.07 13 a 0-20 <br /> Gasoline µg/g(ppm) <1 <1 nm 0-20 <br /> Laboratory Code: 73404(Matrix Spike) <br /> Relative <br /> Reporting Spike Sample %Recovery %Recovery Acceptance Percent <br /> Analyte Units Level Result MS MSD Criteria Difference <br /> Benzene Wig(ppm) 1 <0.02 86 87 55-104 1 <br /> Toluene µg/g(ppm) 1 <0.02 84 83 50-114 1 <br /> Ethylbenzene µg/g(ppm) 1 <0.02 82 81 52-113 1 <br /> Xylenes µg/g(ppm) 3 0.08 73 74 53-114 1 <br /> Laboratory Code: Spike Blank <br /> Relative <br /> Reporting Spike %Recovery %Recovery Acceptance Percent <br /> Analyte Units Level MS MSD Criteria Difference <br /> Benzene µg/g(ppm) 1 106 106 67-108 0 <br /> Toluene Wig(ppm) 1 102 101 66-110 1 <br /> Ethylbenzene µg/g(ppm) 1 100 99 66-110 1 <br /> Xylenes twg(ppm) 3 92 92 64-108 0 <br /> Gasoline µg/g(ppm) 10 76 79 66-115 4 <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-The analyte was detected at a level less than five times the detection limit. The RPD results may not <br /> provide reliable information on the variability of the analysis. <br />