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December 29 , 1994 <br /> • Sample Log 10995 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> From : Stewart's Beacon <br /> Sample(s) Received : 12/21/94 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter o Recovery % Recovery RPD <br /> Benzene 102 109 7 <br /> Ethylbenzene 96 108 12 <br /> TPH as Gasoline 109 103 6 <br /> * RPD = Relative Percent Difference <br /> Parameter Method Blank <br /> Benzene <0. 30 ug/L <br /> Toluene <0 . 30 ug/L <br /> Ethylbenzene <0 . 30 ug/L <br /> Total Xylenes <0 . 50 ug/L <br /> TPH as Gasoline <50 ug/L <br /> Hitra sarkboah <br /> senior Chemist <br />