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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> Q {743)666-0901 <br /> . Quality Control Report <br /> EXXON Company U S A <br /> UP3942 1 <br />'Analysis Volatile Organics by Method 82608 WorkOrder 01060855 <br /> Method SW8260B Lab Batch 1D R39153 <br /> Method Blank Samples in Analytical Batch <br /> RunlD K_010713A-745614 Units ug/L Lab Sample ID Client Sample ID <br />�nalysis Date 07/13/2001 14 15 Analyst JC 01060855-03B MW 10 <br /> 01060855-06B IW 1 <br /> 01060855-07B MW 2 <br /> Analyte Result Rep Llmitl 01060855088 MW 4 <br /> Metes tert-butyl ether NDI 5 0 01060855-098 MW 4 <br /> _ Surr_1 20ichloroethane-d4 9401 62-1191 01060855-14B MW 3 <br /> Surr 4-8romotluorobenzene 100 01 78-1231 01060855-18B UVB MW2 <br /> Surr Toluene-d8 _ 10001 74-1221 01060855-20B V-3 <br /> Laboratory Control Sample(LCS) <br />' RunlD K_010713A-745241 Units uglL <br /> Analysis Date 07113/2001 13 16 Analyst JC <br /> Analyte Spike Result Percent Lower Upper <br /> :�] Added Recovery Limit Limit I <br />' it 1-Dlchloroethene 501 461 921 61 1451 <br /> Benzene 1 501 501 1001 761 1271 <br /> Chlorobenzene 1 501 501 1001 751 1301 <br /> ;Toluene 1 501 49 981 76 125 <br /> Trichloroethene 501 461 921 711 120 <br /> Matrix Spike(M$)1 Matrix Spike Duplicate(MSD) <br /> Sample Spiked 01070355-03 <br /> RunlD K_010713A-745284 Units uglL <br />' Analysis Date 07/13/2001 19 32 Analyst JC <br /> Analyte Sample MS MS Result MS % MSD ! MSD Result MSD % I RPD ' RPD 1 Low High <br />' Result 1 Spike I Recovery 1 Spike Recovery 1, Limit Limit Limit <br /> I Added I Added I I 1 <br /> Dichloroethene NDI 50001 46001 92 5000 46001 92; OI 141 381 172; <br /> nzene W 670_ 50001_ _ 57001 _101 5000 54001 95 61 111 661 134 <br /> Io1 <br /> robenzene NO 50001 51001 102 5000 48001 961 61 131 671 1151 <br /> Toluene NDI 50001 51001 102 5000 4800 961 61 131 591 1251 <br /> ichloroethene NO; 50001 48001 96 5000 46001 921 41 141 131T 1341 <br /> Oers NDIU Not Detected at the Reporting Limit MI-Matrix Interference <br /> B -Analyte detected in the associated Method Blank D -Recovery Unreportable due to Dilution <br /> J -Estimated value between MDL and PQL '-Recovery Outside Advisable QC Limits <br /> he percent recoveries for QC samples are correct as reported Due to significant figures and 01060855 Page 32 <br /> rounding the reported RPD may differ from the displayed RPD values but is correct as reported 7117101 23426 PM <br /> 1 <br />