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R <br /> 41' <br /> u <br /> ' Acculabs Inc. May 12 , 1999 <br /> Sample Log 19999 <br /> QC Report for EPA 8020 & Modified EPA 8015 <br /> Run Log : 2180D <br /> From : SL/Manteca 19976 (Prof . # 779956) <br /> Sample(s) Received 05/11/99 <br /> ' Matrix Spike <br /> Matrix Spike Duplicate <br /> ' Parameter % Recovery % Recovery RPD <br /> Benzene 94 93 1 <br /> ' Ethylbenzene 97 95 2 <br /> TPH as Gasoline 112 107 5 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> ' % Recovery <br /> Benzene 94 <br /> Ethylbenzene 100 <br /> Gasoline 117 <br /> Parameter Method Blank <br />' Benzene <0 . 005 mg/Kg <br /> Toluene <0 . 005 mg/Kg <br /> Ethylbenzene <0 . 005 mg/Kg <br /> Total Xylenes <0 . 005 mg/Kg <br /> TPH as Gasoline <1 . 0 mg/kg <br /> Tom Kwoka <br /> Lab Direct <br /> 1 <br /> 1 <br />