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819 Striker Ave Ste 8 <br /> "'` 834 <br /> Sequoia <br /> Sacramento, A 95600 <br /> '"��� (9 16)921-9600 <br /> 2 1-0100 <br /> IW Analytical FAX equa labs.com <br /> www.sequoialabs.wm <br /> 0 <br /> Gettler-Ryan-Dublin Project: Unocal 0187,Stockton,CA 5309436 <br /> 6747 Sierra Court,Ste.J Project Number: NIA Reported: <br /> Dublin CA,94568 Project Manager: Eric Jansen 09/30/03 17:40 <br /> Gasoline\BTWOxygenates by EPA method 8260B - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3090318-EPA 5030E PIT <br /> Laboratory Contras Sample(3090318-BS2) Prepared&Analyzed:09/25/03 <br /> Benzene 2.77 0.50 ug/l 3.20 87 70-130 <br /> Toluene 15.9 0.50 14.8 107 70-130 <br /> Methyl tert-butyl ether 4.25 0.50 4.96 86 60-140 <br /> Gasoline(C6-CI0) 199 50 220 90 70-130 <br /> Surrogate:1,2-DCA-d4 21.8 25.0 87 60-140 <br /> Surrogate:Toluene-d8 21.4 " 25.0 86 60-140 <br /> Surrogate:4-BFB 21.1 25.0 84 60-140 <br /> Matrix Spike(3090318-MSI) Source:5309436-07 Prepared:09/24/03 Analyzed:09/25/03 <br /> Benzene 2.97 0.50 ug/l 3.20 ND 93 70-130 <br /> Toluene 16.8 0.50 14.8 ND 114 70-130 <br /> Methyl tert-butyl ether 4.14 0.50 4.96 ND 83 60-140 <br /> AdIlkaqctline(C6-C10) 199 50 220 ND 90 60-140 <br /> urrogate:l,2-DCA-d4 21.1 25.0 85 60-140 <br /> Surrogate:Toluene-d8 11.8 25.0 87 60-140 <br /> Surrogate:4-BFB 20.0 25.0 80 60-140 <br /> Matrix Spike Dup(3090318-MSDI) Source:5309436-07 Prepared:09/24/03 Analyzed:09/25/03 <br /> Benzene 2.76 0.50 u9/1 3.20 ND 86 70-130 7 25 <br /> Toluene 15.7 0.50 14.8 ND 106 70-130 7 25 <br /> Methyl tert-butyl ether 4.08 0.50 4.96 ND 82 60-140 1 25 <br /> Gasoline(C6-C10) 188 50 220 ND 85 60-140 6 25 <br /> Surrogate:1,2-DCA-d4 21.4 15.0 86 60-140 <br /> Surrogate:2'oluene-d8 11.3 15.0 85 60-140 <br /> Surrogate.,4-BFB 10.2 25.0 81 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,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> i <br /> Page 7 of 8 <br /> I <br />