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November 7, 1994 <br /> Sample Log 10668 <br /> QC Report for EPA 8020 & Modified EPA 8015 <br /> From : Dart Container (Stockton Service Station) <br /> Sample(s) Received : 11/04/94 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery % Recovery RPD <br /> Benzene 107 105 2 <br /> Ethylbenzene 97 96 1 <br /> TPH as Gasoline 91 88 3 <br /> * RPD = Relative Percent Difference <br /> Parameter Method Blank <br /> Benzene <0. 005 mg/kg <br /> Toluene <0.005 mg/kg <br /> Ethylbenzene <0 . 005 mg/kg <br /> Total Xylenes <0.005 mg/kg <br /> TPH as Gasoline <0. 50 mg/kg <br /> senior <br /> chemist <br /> S<nior Chemist <br />