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November 29 , 1994 <br /> Sample Log 10783 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> From : Comfort Air <br /> Sample(s) Received : 11/18/94 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter o Recovery Recovery RPD <br /> Benzene 99 115 15 <br /> Ethylbenzene 92 107 15 <br /> TPH as Gasoline 102 107 5 <br /> * RPD = Relative Percent Difference <br /> Parameter Method Blank <br /> Benzene <0 30 ug/L <br /> Toluene <0 30 ug/L <br /> Ethylbenzene <0 30 ug/L <br /> Total Xylenes <0 . 50 ug/L <br /> TPH as Gasoline <50 ug/L <br /> Aitra <br /> sanlo chemist <br /> Senior Chemist <br />