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�5w"" a o Ord O � <br />' April 30 , 1998 <br /> Sample Log 18363 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 41721 <br /> From : 1717 South Center Street (Pro) . # 125982 ) <br />' Sample( s) Received : 04/17/98 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery a Recovery RPD <br /> Benzene 108 115 6 <br /> Ethylbenzene 105 111 6 <br /> TPH as Gasoline 113 118 4 <br /> t * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> Recovery <br /> Benzene 109 <br /> Ethylbenzene 104 <br /> Gasoline 113 <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 /> l� <br /> Stewett godolslcy <br /> Senior Chemist <br /> ' 1046 Olive Drive, Suite 2 Davis, CA 95616 • (530) 757-0920 • Fax (530) 753-6091 <br />