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October 24 , 1997 <br /> Sample Log 17508 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 4166U <br /> From : Southland (Prof . # 020700497. 6304 ) <br /> Sample(s) Received : 10/17/97 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery % Recovery RPD <br /> Benzene 1.03 109 6 <br /> Ethylbenzene 104 110 6 <br /> TPH as Gasoline 99 108 9 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> Recovery <br /> Benzene 110 <br /> Ethylbenzene 112 <br /> Gasoline 105 <br /> Parameter Method Blank <br /> TPH as Gasoline <50 ug/L <br /> stAmart voaoi.hy <br /> senior cAuyint <br />