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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ® HOUSTON,TX 77054 <br /> Quality Control Report (713)660-0901 <br /> Shell Oil Company <br /> INC#N/A <br /> Analysis: Semivolatile Organics by Method 8270C WorkOrder: 04061001 <br /> Method: 5W8270C Lab Batch ID: 39054 <br /> Laboratory Control Sample LCS <br /> RunID: P_040701A-229688(} Units: ug/kg <br /> Analysis Date: 07/01/2004 19:34 Analyst: GQ <br /> Preparation Date: 061291200411:24 Prep By: DMN Method SW3550B <br /> ' Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> 2,4-Dichlorophenol 850 640 75.3 39 135 <br /> 2,4-Dimethylphenol 850 680 80.0-32-119 <br /> 2,4-Dinitrophenol 850 560 65.9 1 191 <br /> 2,4-Dinitrotoluene 850 640 75.3 30 150 <br /> 2,6-Dinitrotoluene 850 640 75.3 30 150 <br /> 2-Chloronaphthalene 850 670-78.8 20 175 <br /> 2-Chlorophenol 850 620 72.9 23 134 <br /> 2-Methylnaphthalene 850 620 72.9 45 135 <br /> 2-Nitroaniline 850 520 61.2 20 175 <br /> 2-Nitrophenol 850 640 75.3 29 182 <br /> 3,3 Dichlorobenzidine 850 620 72.9 1 261 <br /> 3-Nitroaniline 850 620 72.9 20 175 <br /> 4,8-Dinitro-2-methylphenol 850 610 71.8 1 181 <br /> 4-Bromophenyi phenyl ether 850 590 69.4 20 175 <br /> 4-Chloro-3-methyl phenol 850 650 76.5 22 147 <br /> 4-Chloroaniline 850 530 62.4 20 175 <br /> 4-Chlorophenyl phenyl ether 850 620 72.9 25 158 <br /> 4-Nitroaniline 850 610 71.8 20 175 <br /> 4-Nitrophenol 850 680 80.0 1 132 <br /> Acenaphthene 850 600 70.6 30 160 <br /> Acenaphthylene 8501 620 72.9 10 . 150 <br /> Aniline 850 440 51.8 10 160 <br /> Anthracene 850 660 77.6 27 133 <br /> Benz(a)anthracene 850 640 75.3 33 143 <br /> Benzo(a)pyrene 850 640 75.3 17 163 <br /> Benzo(b)fluoranthene 850 630 74.1 24 159 <br /> Benzo(g,hJ)perylene 850 590 69.4 1 219 <br /> Benzo(k)fluoranthene 850 630 74.1 11 162 <br /> Benzoic acid 1700 840 49.4 4 164 <br /> Benzyl alcohol 850 610 71.8 45 135 <br /> Bis(2-chioroethoxy)methane 850 670 78.8 33 184 <br /> BIS(2-chforoethyl)ether 850 590 69.41 28 158 <br /> Bis(2-chloroisopropyl)ether 850 590 69.4 36 166 <br /> Bis(2-ethylhexyi)phthalate 850 700 82.4 8 158 <br /> Butyl benzyl phthalate 850 630 74.1 1 152 <br /> Qualifiers: ND/U-Not Detected at the Reporting Limit Ml-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 /> N/C-Not Calculated-Sample concentration is greater than 4 times the amount of spike added.Control limits do not apply. <br /> The percent recoveries for QC samples are correct as reported.Due to significant figures and <br /> rounding,the reported RPD may differ from the displayed RPD values but is correct as reported. 04061001 Page 45 <br /> 719/04 3:06:59 PM <br />