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` 819 Strlkbr Ave Ste 8 <br /> • acraento CA 95834SeqUo1a (9 6)921 9600 <br /> F"(9;6)921OInn <br /> Analytical ww sequuta[ab5 <br /> corn <br /> OMI-Thames Water Stockton Project NIA 5408189 <br /> 2500 Navy Drive Protect Number NIA Repot ted <br /> Stockton CA,95206 Project Manager Richard Stiffler-A1P 08/11/04 19 41 <br /> Gas olinelBTEXIOxygenates by EPA method 8260B - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Linut Units Level ResulC %REC Li nuts RPD Li" Notes <br /> Batch 4080103 -EPA 5030B [P/TJ <br /> Matrix Spike(4080103 MSI) Source 5408189-01 Prepared&Analyzed 08/09/04 <br /> Methyl tert-butyl ether 992 050 ugll 864 ND 114 60-140 <br /> Benzene 11 5 050 536 ND 21,) 70-130 QM01 <br /> Toluene 35 7 050 303 ND 118 70-130 <br /> Gasoline Range Organics(C4-C12) 397 50 440 ND 90 60-140 <br /> Surrogate Toluene-d8 108 100 108 60-140 <br /> Surrogate 4-BFB 843 100 84 60-140 <br /> Sun ogate 12-DCA d4 103 100 103 60140 <br /> Matrix Spike Dup(4080103-MSDI) Source 5408189-01 Prepared&Analyzed 08/09/04 <br /> Methyl tent-butyl ether 9 88 050 ugll 864 ND 114 60-140 0 6 25 <br /> Benzene t0 9 0 50 5 36 ND 203 70-130 5 25 QMO1 <br /> Toluene 31 7 050 303 ND 105 70-130 12 25 <br /> •Gasoline Range Organics(C4-C12) 394 50 n 440 ND 90 60-140 0 8 25 <br /> Surrogate Toluene-d8 9 70 100 97 60-140 <br /> Surrogate 4-BFB 884 100 88 60-140 <br /> Surrogate 12-DCA-d4 109 100 109 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated r esults at a reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 7 <br />