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May 2 , 1997 <br /> Sample Log 16819 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 4161Z <br /> From : Drake (Pro7 . # 02070 0512 ) <br /> Sample(s) Received 04/30/97 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter o Recovery % Recovery RPD <br /> Benzene 107 110 3 <br /> Ethylbenzene 105 108 3 <br /> TPH as Gasoline 131 133 2 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> % Recovery <br /> Benzene 101 <br /> Ethylbenzene 98 <br /> Gasoline 118 <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 /> Stewart Podolaky <br /> Senior Chem let <br /> ----------- - -- <br />