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' HOUSTON LABORATORY <br /> 6660 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77454 <br /> ® (713)660-0901 <br /> Quality Control Report <br /> EXXON Company U S A <br /> 400447-A1 <br /> 'Analysis Purgeable Aromatics WorkOrder 00040550 <br /> Method SW80216 Lab Batch ID 812907 <br /> Matrix Spike MS /Matrix Spike Duplicate MSD <br /> Sample Spiked 00040550-01 <br /> ' RunlD HP_W 000425A 258696 Units ug1L <br /> Analysis Date 04/25/2000 14 11 Analyst DL <br /> i <br /> i <br /> Analyte Sample MS IVIS Result MS% MSD MSD Result MSD% RPD RPD Low High <br /> Result Spike Recovery Spike Recovery Limit Limit Limit <br /> Added Added <br /> m p-Xylene I ND 40 39 97 6 40 40 992 1 66 17 53 1441 <br /> o-XyleneN D� 20 19 96 4 20 20 977 1 40 18 53 1431 <br /> Xylenes Total II ND60� 58 96 7 60 601 1070 3 39 181 53 144 <br /> I <br /> %R-ualifiers NDIU-Not Detected at the Reporting Limit "-Recovery Outside Advisable QC Limits <br /> ' B-Analyte detected in the associated Method Blank D-Recovery Unreportable due to Dilution <br /> 3-Estimated value between MDL and PQL 00040550 Page 12 <br /> 4!28100 10 03 07 ANI <br /> t <br />