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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#NIA <br /> Analysis: Semivolatile Organics by Method 8270C WorkOrder: 04064001 <br /> ,Method: SW8270C Lab Batch ID: 39054 <br /> Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Law High <br /> Result Spike Result Recovery Spike Result Recovery Limit Limit Limit <br /> Added Added <br /> :12,4-Trichiorobenzene ND 847 450 53.1 848 310 36.6' 36.6" 28 44 142 <br /> 1j,:22-Dichlorobenzene NDJ 847 4201 49.6 848 2301 27.1 " 58.5 601 32 129 <br /> 1,2-Diphenylhydrazine ND 847 490 57.8 848J 440 51.91 10.8 601 40 160 <br /> 1,3-Dichlorobenzene NO 847 4201 49.6 8481 210 24.81 66.7• 60 1 172 <br /> 1,4-Dichlorobenzene ND 847 410 48.4 8481 210 24.8 64.5' 281 201 124 <br /> 2,4,5 Trichlorophenol ND 847 5701 67.31 8481 520 61.31 9.171 601 40 150 <br /> 4,6-Trichlorophenol ND 847 550 64.91 84$ 510 60.11 7.551 601 37J 144 <br /> 2,4-Dichlorophenof NDI 847 5101 60.2 8481 4801 56.61 6.06 60 391 135 <br /> 2,4-Dimethylphenol NDI 847 5401 63.71 8481 4901 57.81 9.71 601 32 119 <br /> 2,4-Dinitrophenoi NO 847 490 57.8 8481 430 50.71 13.0 601 1 191 <br /> 2,4-Dinitrotoluene ND 847 570 67.3 848 550 64.9 3.57 50 30 150 <br /> J2,6-Dinitrotoiuene NO 847 580 68.4 8481 5201 61.3 10.9 60 30 150 <br /> 2-Chloronaphthalene ND 847 510 60.2 6481 450 53.1 12.5 60 201 175 <br /> 2-Chlorophenol ND 847 4901 57.8 848 400 47.2 .20.21 40 231 134 <br /> 2-Methylnaphthalene ND 847 4901 57.8 848 400 47.21 20.21 60 45 135 <br /> -Nitroanifine ND 847 460 54.3 848 430 50.7 6.74 601 20175 <br /> -Nitrophenol NO 847 480 56.6 848 40047.2 18.2 60 291 182 <br /> 3,3'-Dichlorobenzidine ND 847 550 64.9 848 520 61.3 5.61 60 11 261 <br /> 3-Nitroaniiine NO 847 570 67.3 848 540 63.7 5.41 60 20 175 <br /> :4,6-Dinitro-2-methyiphenol NO 847 570 67.3 848 530 62.5 7.27 60 1 181 <br /> 4-Bromophenyl phenyl ether ND 847 520 61.4 848 480 56.6 8.00 60 20 175 <br /> 4-Chloro-3-methylphenol NO 847 550 64.9 848 510 60.1 7.55 42 2-21 147 <br /> 4-Chloroaniline ND 847 420 49.6 848 400 47.2 4.88 60 201 175 <br /> 4-Chloraphenyl phenyl ether ND 847 520 61.4 848 470 55.4 10.1 60 25 158 <br /> 11�4-Nitroaniline ND- _ 847 5601 66.1 848 540 63.7 3.64 60 201 175 <br /> 4-Nitrophenol NO 847 640 75.5 848 6101 71.9 4.80 50 11 132 <br /> Acenaphthene ND 847 490 57.8 848 440 51.9 10.8 31 30 160 <br /> Acenaphthylene ND 847 500 59.0 848 450 53.1 10.5 50 10 150 <br /> Aniline NO 847 330 38.9 848 300 35.4 9.52 60 10 160 <br /> Anthracene ND 847 580 68.4 848 540 63.7 7.14 50 27 133 <br /> Benz(a)anthracene ND 847 580 68.4 848 550 64.9 5.31 50 33 143 <br /> Benzo(a)pyrene ND 8471 570 67.3 848 560 66.01 1.77 60 171 163 <br /> Benzo(b)fluaranthene NO 8471 570 67.3 848 560 66.01 1.77 60 241 159 <br /> Benzo(g,hj)perylene NO 8471 540 63.7 848 520 61.3 3.77 60 1 219 <br /> Benzo(k)fluoranthene ND 847 580 68.4 848 540 63.71 7.1460 11 162 <br /> IR Benzoic acid NO 1690 640 37.8 1700 560 33.0 13.3 60 4 164 <br /> Benzyl alcohol NO 847 500 59.01 848 480 56.64.08 60 45 135 <br /> Qualifiers: ND/U-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 /> 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 04061001 Page 47 <br /> rounding,the reported RPD may differ from the displayed RPD values but is correct as reported. <br /> 719164 3:07:00 PM <br />