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�r a o Ooa Qv <br /> August 13 , 1997 <br /> Sample Log 17139 <br /> QC Report for EPA 8020 & Modified EPA 8015 <br /> Run Log : 2163A <br /> From : Southland/Pombo/GrantLine (Proj . # 020700544/6711) <br /> Sample(s) Received : 08/06/97 <br /> Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery % Recovery RPD <br /> Benzene Z11 106 5 <br /> Ethylbenzene 111 103 7 <br /> TPH as Gasoline 100 96 4 <br /> * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br /> % Recovery <br /> Benzene 105 <br /> Ethylbenzene 100 <br /> Gasoline 92 <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 /> 4 4kr�j <br /> Stewart Podolsky <br /> Senior Chemist <br />