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• <br />' Acculabs Inc. June 1, 1999 <br /> Sample Log 20036 <br /> QC Report for EPA 8020 & Modified EPA 8015 <br /> Run Log : 2180K <br /> From : Earthgrai.ns - Stockton (Prof. # 125997) <br /> Sample(s) Received fl 5/18/99 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br />' Parameter Recovery Recovery RPD <br /> Benzene 105 103 2 <br /> Ethylbenzene 98 96 2 <br /> TPH as Gasoline 102 104 2 <br /> t * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> Recovery <br /> Benzene 99 <br /> Ethylbenzene 97 <br /> Gasoline 98 <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 /> 1 <br /> Tom Kwa <br />' Lab Dirac <br />