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ACCULASST INC <br /> December 11, 2001 <br /> Sample Log 23238 <br /> QC Report for EPA 8020 & Modified EPA 8015 <br /> 1 Run Log : 4202I <br /> From : STHL\Manteca #19976 (Proj . # 779956. 63040000) <br /> Sample(s) Received : 12/03/01 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery % Recovery RPD <br /> i <br /> Benzene 96 97 1 <br /> 1 Ethylbenzene 107 99 8 <br /> TPH as Gasoline 113 103 10 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> Recovery <br /> Benzene 95 <br /> Ethylbenzene 104 <br /> Gasoline 120 <br /> i <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 /> Tom KWO)fe <br /> Lab Director <br />