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S <br /> Acculabs Inc. February 24 , 1999 <br /> Sample Log 19648 <br /> QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 4181T <br /> From : Southland 19976 (Prod . # 103998.6304) <br /> Sample(s) Received : 02/18/99 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter Recovery % Recovery RPD <br /> Benzene 94 99 5 <br /> Ethylbenzene 112 116 4 <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 99 <br /> Ethylbenzene 99 <br /> Gasoline 136 <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 /> Tomt irr - <br /> Lab Df rector <br /> I <br /> 1 <br />