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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#NlA <br /> Analysis: Semivolatile Organics by Method 82700 WorkOrder: 04051001 <br /> Method: SW8270G Lab Batch ID: 39054 <br /> Method Blank <br /> RunID: P_040701A-2296859 Units: ug/kg <br /> :Analysis Date: 07/01/2004 19:04 Analyst: GQ <br /> Preparation Date: 06/29/2004 11:24 Prep By: DMN Method SW3550B <br /> Analyte Result Rep Limit <br /> Dieth hthalate ND 330 <br /> Dimeth hthalate ND 330 <br /> Fluoranthene ND 330 <br /> Fluorene NO 330 <br /> Hexachlorobenzene ND 330 <br /> Hexachlorobutadiene ND 330 <br /> Hexachloro o entad:--- ND 330 <br /> Hexachloroethane ND 330 <br /> Inden 12 3-cd rene ND 330 <br /> Iso horone ND 330 <br /> N-Nitrosodi-n- rolamine ND 330 <br /> N-N'trosodi hen amine NO 330 <br /> Naphthalene ND 330 <br /> Nitrobenzene ND 330 <br /> Pentachlorophenol ND 800 <br /> Phenanthrene ND 330 <br /> Phenol ND 330 <br /> ne ND 330 <br /> 'dine ND 330 <br /> 2-Meth henol ND 330 <br /> 3 8 4-Meth I henol ND 330 <br /> Surr.2 4 6-Tribromo-henal 100.0 19-135 <br /> Surr.2-Fluorobi hen I 82-4 15-140 <br /> Surr.2-Fluoro henol 84.0 15-122 <br /> Surr.Nitrobenzene-d5 76.5 10.134 <br /> Sunt Phenol-d5 88.0 10-123 <br /> Surr Te hen I d14 882 18 166 <br /> Laboratory Control Sample LCS <br /> RunID: P_040709A 2296860 Units: ug/kg <br /> Analysis Date: 07/01/2004 19:34 Analyst GQ <br /> Preparation Date: 06/29/2004 11:24 Prep By: DMN Method SW35508 <br /> Analyte Splke Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> 1,2,4-Trichlorobenzene 850 620 72.9 44 142 <br /> 1,2-Dichlorobenzene 850 58OF 68.2 32 129 <br /> 1,2-Diphenylhydrazine 850 550 64.7 40 160 <br /> 1,3-Dichlorobenzene 850 580 68.2 1 172 <br /> 1,4-Dichlorobenzene 850 570 67.1 20 124 <br /> 2,4,5-Trichlorophenol 850 630 74.9 40 150 <br /> 2,4,6-Trichlorophenol 850 630 74.1 37 144 <br /> Qualifiers: ND1U-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 /> NIC-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 04061001 Page 44 <br /> rounding,the reported RPD may differ from the displayed RPD values but is correct as reported. <br /> 7191D4 3:06:58 PM <br />