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ACCULABS, INC <br /> October 18 , 2001 <br /> Sample Log 23036 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 4200T <br /> From : STHL / Manteca #21756 (Pro] . # 781723 . 63070000) <br /> Sample(s) Received : 10/08/01 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery Recovery RPD <br /> Benzene 88 90 2 <br /> Ethylbenzene 91 98 7 <br /> ' TPH as Gasoline 122 120 2 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> Recovery <br /> Benzene 87 <br /> M Ethylbenzene 90 <br /> Gasoline 99 <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 Kwok <br /> Lab Director <br /> i <br />