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Com+ a o O a Q G� <br /> July 23, 1998 <br /> Sample Log 18763 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 2172W <br /> From : Main St Ph II (Prof . # 05-001500) <br /> Sample(s) Received : 07/20/98 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter Recovery o Recovery RPD <br /> Benzene 97 97 0 <br /> Ethylbenzene 96 94 2 <br /> TPH as Gasoline 101 97 4 <br /> RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> Recovery <br /> Benzene 97 <br /> Ethylbenzene 93 <br /> Gasoline 96 <br /> Parameter Method Blank <br /> Benzene <0.50 ug/L <br /> Toluene <0.50 ug/L <br /> Ethylbenzene <0.50 ug/L <br /> Total Xylenes <0.50 ug/L <br /> TPH as Gasoline <50 ug/L <br /> Stewart Podolsky � <br /> Senior Chemist <br /> j 1046 Olive Drive. Suite 2 Davis, CA 95616 (530) 757-0920 Fax (530) 753-6091 <br />