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16 <br /> Acculabs Inc. October 22, 1998 <br />' Sample Log 19185 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 4178B <br /> ' From : SL/20632 (Prof . # 102483) <br /> Sample(s) Received : 10/21/98 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter Recovery $ Recovery RPD <br /> Benzene 95 102 7 <br /> Ethylbenzene 97 105 8 <br /> ' TPH as Gasoline 112 117 4 <br /> * RPD = Relative Percent Difference <br /> ' Parameter Laboratory Control Sample <br /> % Recovery <br /> Benzene 100 <br /> Ethylbenzene 103 <br /> Gasoline 114 <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 /> tStew lsky <br /> Senior Ck1e st <br />