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• January 30 , 1997 <br /> Sample Log 16311 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 4158G <br /> From : Granite Construction (Prod . # 2088 .08) <br /> Sample(s) Received : 01/23/97 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter Recovery Recovery RPD <br /> Benzene 110 109 1 <br /> Ethylbenzene 109 107 2 <br /> TPH as Gasoline 109 103 6 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> Recovery <br /> Benzene 109 <br />. Ethylbenzene 107 <br /> Gasoline 106 <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 /> 'd/W <br /> Joel Ki!! <br /> senior chebist <br />