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. July 29 , 1998 <br /> Sample Log 18810 <br /> QC Report for EPA 8020 & Modified EPA 8015 <br /> Run Log : 2172Z <br /> From : Southland #14117 Stockton <br /> Sample(s) Received : 07/28/98 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery % Recovery RPD <br /> Benzene 100 101 1 <br /> Ethylbenzene 99 99 0 <br /> TPH as Gasoline 104 106 2 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> Recovery <br /> Benzene 102 <br /> Ethylbenzene 100 <br /> Gasoline 101 <br /> Parameter Method Blank <br /> Benzene <0 . 005 mg/Kg <br /> Toluene <0 . 005 mg/Kg <br /> Ethylbenzene <0 . 005 mg/Kg <br /> Total Xylenes <0 . 005 mg/Kg <br /> TPH as Gasoline <1 . 0 mg/kg <br /> Steuart Podolsky— <br /> Senior chemist <br />• <br /> 1046 Olive Drive, Suite. 2 Davis, CA 95616 • (530) 757-0920 • Fax (530) 753-6091 <br />