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ACCULASS, INC. <br /> October 2 , 2000 <br /> Sample Log 21807 <br /> QC Report for EPA 8020 & Modified EPA 801-5 <br /> Run Log : 2195I <br /> From : 7-Eleven 19976 <br /> Sample(s) Received : 09/18/00 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery % Recovery RPD <br /> Benzene 94 97 3 <br /> Ethylbenzene 92 95 3 <br /> TPH as Gasoline 96 100 4 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> % Recovery <br /> Benzene 97 <br /> Ethylbenzene 98 <br /> Gasoline 102 <br /> Parameter Method Blank <br /> Benzene <0. 20 ug/L <br /> Toluene <0. 20 ug/L <br /> Ethylbenzene <0. 20 ug/L <br /> Total Xylenes <0.20 ug/L <br /> TPH as Gasoline <20 ug/L <br /> Tom Kwok <br /> Lab Dire o <br /> . P <br />