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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> ® <br /> (T13)6W-0001 <br /> Quality Control Report <br /> EXXON Company U S A <br /> 1808 S Ell Dorado St.Stockton,CA <br /> dnalysis Volatile Organics by Method 8260B WorkOrder• 00080031 — <br /> ethod SW8290B Lab Batch ID R18887 <br /> Method Blank Samples In Analytical Batch <br /> unlD M DDo8o8A-363834 Units ug/L Lab Sample ID Chent Sample ID <br /> natysis Date 08/08/2000 13 04 Analyst NL 00080031-01 B MW-1 <br /> 00080031-02B MW-2 <br /> OOD80031-038 MW-3 <br /> Analyte Result Rep Limit 00D80031-04B MW-4 <br /> 00080031-05B MW-5 <br /> MethYl tort-butyl ether ND 50 <br /> Surr 1 2-Mchloroethane-d4 1040 62-119 00080031-06B MW-6 <br /> Surr 4-BromofEuorobenzene 1020 78-123 00080031-07B MW-7 <br /> Surr Toluene-i8 880 74-122 00080031-08B VEW-2 <br /> Laboratory Control Sample(LCS1 <br /> RunlD M - 33 Units uglL <br /> Analysis Date 08/0812000 12 37 Analyst NL <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limd Limit <br /> 11-Dichloroethene 50 59 118 66 134 <br /> Benzene 50 55 110 79 119 <br /> ' Chlorobenzene 50 43 86 74 110 <br /> Toluene 50 46 92 73 113 <br /> Tnchloroethene 5o 521 104 741 122 <br /> Matrix SpikelMSI 1 Matrix Spike Duplicate MSD <br /> Sample Spiked 00080060-01 <br /> RunlD AA_000808A-363838 Units ug/L <br /> Analysis Date 08/0812000 14 37 Analyst NL <br /> 7 <br /> Analyte Sample Result MS MS Result MS% MSD MSD Result MSD% RPD RPD Low High <br /> Spike Recovery Spike Recovery Limit Limit Limit <br /> Added Added <br /> 1-Dichloroethene ND 2500 3300 132 2500 3400 136 3 14 38 172 <br /> Benzene NO 2500 3100 119 2500 3100 119 0 11 66 134 <br /> hlorobenzene NO 2500 2300'1 92 2500 2300 92 0 131 67 115 <br /> toluene 330 2500 2900 103 2500 2900 103 0 131 59 125 <br /> 11krchloroethene ND 2500 2800 112 2500 2900 116 4 14 61 134 <br /> ralffiers NDIU-Not Detected at the Reporting Limit '-Recovery Qut5+de Advisable QC Limits <br /> B-Analyte detected in the associated Method Blank D-Recovery Unreportable due to Dilution <br /> J-Estimated value oetween MDL and PQL MI-Matrix Interference <br /> 00080031 Page 13 <br /> 6!16!00 4 04 12 PM <br />