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July 25, 1997 <br /> Sample Log 17053 <br /> 1 <br /> QC Report for EPA 602 & Modified EPA 8015 <br />' Run Log : .4164F <br /> From : Earthgrains -- Stockton <br /> Sample(s) Received : 07/18/97 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter $ Recovery Recovery RPD <br /> Benzene 89 98 10 <br /> Ethylbenzene 87 98 12 <br /> TPH as Gasoline 109 111 2 <br /> * RPD = Relative Percent Difference <br /> 1 <br /> Parameter Laboratory Control Sample <br /> I % Recovery ^� <br /> Benzene 95 <br /> Ethylbenzene 95 <br /> Gasoline 108 <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 /> 1 <br /> I <br /> 1 <br /> 1 Stewart Hoaolaky <br /> Senior Chealat <br /> 1 <br />