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April 28 , 1998 <br /> Sample Log 18363 <br /> QC Report for EPA 8020 & Modified EPA 8015 <br /> Run Log : 2170R <br /> From : 1717 South Center Street (Pro7 . # 125982 ) <br /> tSample(s) Received : 04/17/98 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery % Recovery RPD <br /> Benzene 112 106 6 <br /> Ethylbenzene 114 107 6 <br /> No gasoline spike recovery due to high gas in spiked sample. <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> % Recovery <br /> Benzene 105 <br /> Ethylbenzene 104 <br /> Gasoline 111 <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 /> 1 <br /> Stewart Podolsky <br /> senior chemist <br />' 1046 Olive Drive, Suite 2 Davi,,, CA 95610 (530) 757-0920 Fax (530) 753-6091 <br />