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ACCULAB5, INC <br /> • January 18 , 2002 <br /> Sample Log 23363 <br /> QC Report for EPA 8020 & Modified EPA 8015 <br /> ' Run Log : 4203D <br /> From : STHL/Manteca #21756 (Proj . # 781723 .63070000) <br /> Sample(s) Received : 01/09/02 <br /> ' Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery % Recovery RPD <br /> Benzene 92 87 5 <br /> Ethylbenzene 106 102 4 <br /> TPH as Gasoline 113 146 26 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> % Recovery <br /> Benzene 92 <br /> Ethylbenzene 103 <br /> Gasoline 121 <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 Kwoxa <br /> Lab Dire <br />