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1 <br /> HOUSTON LABORATORY i <br /> 8HO tSTON.TEXAS <br /> DRIVE <br /> >iousrow,Texas Hasa <br /> ® (713)660-0801 <br /> . Quality Control Report <br /> EXXON Company U S A <br /> 000229-K1 <br /> Analysis Purgeable Aromatics WorkOrder 00030103 <br /> ethod SW8021B Lab Batch ID 810246 <br /> Matrix Spike WSI 1 Matrix Spike Duplicate MSD <br /> Sample Spiked 00030103-01 <br /> RunlD HP_J 000306A-211435 Units ug1L <br /> Analysis Date 03/06/2000 23 53 Analyst CJ <br /> Analyte Sample MS MS Result MS% MSD MSD Result MSD% RPD RPD Low High <br /> Result Spike Recovery Spike Recovery Limit Limit Limit <br /> Added Added <br /> IlEthylbenzene ND 20 28 142 20 25 126 119 19 52 1424 <br /> IMethyl lert-butyl ether ND 20 29 144 20 23 116 22 0" 201 39 150 <br /> Toluene ND 20 281 142 20 26 128 104 20 38 159 <br /> m p-Xylene ND 40 56 140 40 50 126 105 17 53 144 <br /> o-Xylene ND 20 281 139 20 25 124 115 18 53 143' <br />,Xylenes Total NDI 60 84 140 60 75 125 113 18 53 1441 <br /> 1 <br /> 1 <br /> 1 <br /> W,ifiers ND1U-Not Detected at the Reporting Limit "-Reoovery Outside Advisable QC Limits <br /> B-Analyte detected in the associated Method Blank D-Recovery Unreportable due to Dilution <br /> J-Estimated value between MDL and PQL <br />' 3/16100 2 46 01 PM <br />