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October 30, 1997 <br /> Sample Log 17538 <br />' QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 4166W <br />' From : EarthGrains - Stockton <br /> Sample(s) Received : 10/24/97 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter Recovery Recovery RPD <br /> 1 Benzene 109 110 1 <br /> Ethylbenzene 112 111 1 <br />' TPH as Gasoline 113 115 2 <br /> * RPD = Relative Percent Difference <br /> tParameter Laboratory Control Sample <br /> Recovery <br /> Benzene 107 <br />,. Ethylbenzene 112 <br /> Gasoline 111 <br />' Parameter Method Blank <br />' TPH as Gasoline <50 ug/L <br /> 1 <br /> Stera olsky <br /> sonlor Chemist <br /> 1 <br />