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�� e o Owe QP <br /> August 13 , 1997 <br /> Sample Log 17139 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 4164V <br /> From : Southland/Pombo/GrantLine (Proj . # 020700544/6711 ) <br /> Sample(s) Received : 08/06/97 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery % Recovery RPD <br /> Benzene 96 91 6 <br /> Ethylbenzene 95 87 8 <br /> TPH as Gasoline 107 98 9 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> % Recovery <br /> Benzene 94 <br /> Ethylbenzene 94 <br /> Gasoline 111 <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 Podois <br /> Senior Chemist <br />