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ACCULAB9, INC <br /> November 20, 2001 <br /> Sample Log 23140 <br />' QC Report for EPA 8020 & Modified EPA 8015 <br /> Run Log : 2211E <br />' From : STHL--Pershing #17334 (Prof . # 779950 . 63040000) <br /> Sample(s) Received : 11/07/01 <br /> ' Matrix Spike <br /> Matrix Spike Duplicate <br /> Parameter Recovery $ Recovery RPD <br />' Benzene 103 99 4 <br /> Ethylbenzene 104 102 2 <br /> TPH as Gasoline 163 165 2 <br /> * RPD = Relative Percent Difference <br />' Parameter Laboratory control Sample <br /> Recovery <br /> 1 <br /> Benzene 93 <br /> Ethylbenzene 100 <br /> Gasoline 106 <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 /> 1 <br /> ' Tom Kwoka <br /> Lab Dir o <br />