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December 13 , 1994 <br /> Sample Log 10920 <br /> 1 QC Report for EPA 8020 & Modified EPA 8015 <br />' From : Grantline Gas and Food <br /> Sample(s) Received : 12/09/94 <br />' Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery % Recovery RPD <br />' Benzene 94 104 10 <br /> Ethylbenzene 89 93 4 <br />' TPH as Gasoline 104 108 4 <br /> * RPD = Relative Percent Difference <br /> I <br /> Parameter Method Blank <br /> I <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 /> I <br /> f <br /> Mitra Sarkhosh <br /> Senior Chemist <br /> I <br />