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' Acculabs Inc. November 5, 1998 <br /> Sample Log 19224 <br />' QC Report for EPA 602 & Modified EPA 8015 <br /> Run Log : 4178M <br /> From . Earth Grains Stockton (Prof . # 121382) <br /> Sample(s) Received : 10/30/98 <br />' Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter % Recovery Recovery RPD <br /> Benzene 96 104 8 <br /> Ethylbenzene 100 106 6 <br /> TPH as Gasoline 104 117 12 <br />' * RPD = Relative Percent Difference <br /> Parameter Laboratory Control Sample <br />' <br /> % Recovery <br /> a <br />'• Benzene 109 <br /> Ethylbenzene 113 <br /> Gasoline 120 <br />' Parameter Method Blank <br /> 1 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 /> Tom Kwolca <br /> Lab Dirac r <br />