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December 5 , 1997 <br /> . Sample Log 17664 <br /> QC Report for EPA 8020 & Modified EPA 8015 <br /> Run Log : 2166H <br /> From : Southland/Pershing, Stkn (Prof . # 020700496/6304) <br /> Sample(s) Received : 11/26/97 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter 's Recovery % Recovery RPD <br /> Benzene 99 100 1 <br /> Ethylbenzene 99 98 1 <br /> TPH as Gasoline 99 94 5 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> Recovery <br /> Benzene 97 <br /> Ethylbenzene 97 <br /> Gasoline 95 <br /> Parameter Method Blank <br /> TPH as Gasoline <1.0 mg/Kg <br /> 00 <br /> sterwrt po401sky <br /> 9anior CLesist <br />