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819 StSte 8 <br /> 4DSequoia <br /> Sacrasnenento,CAA 95834 <br /> (916)921-9600 <br /> FAX Analytical ww.mq 6) labs.c rn <br /> www.sequoialabs.com <br /> • <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\BTEXlOzygenates by EPA method 8260B <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-3 0187(S309436-01)Water Sampled: 09/18/03 08:10 Received:0911810313:50 <br /> Benzene 2.0 0.50 ug/l 1 3090318 09/24/03 09/24/03 EPA 82608 <br /> Toluene 1.0 0.50 It 1. " <br /> Ethylbenzene 2.7 0.50 " <br /> Xylenes(total) 0.59 0.50 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> Gasoline(C6-C10) 530 50 HC-12 <br /> Surrogate:1,2-DCA-d4 88% 60-140 " <br /> Surrogate:Toluene-d8 86% 60-140 " <br /> Surrogate:4-BFB 85% 60-140 " <br /> NPI-22 0187(S309436-02)Water Sampled:09/18/03 08:15 Received:09/18/03 13:50 <br /> Benzene 2.6 0.50 ug/l 1 3090318 09/24/03 09/24/03 EPA 8260B <br /> Toluene 0.51 0.50 " <br /> hylbenzene 7.8 0.50 <br /> lens(total) 8.5 0.50 " <br /> 'MORethyl tert-butyl ether ND 0.50 <br /> Gasoline(C6-C10) 390 50 HC-12 <br /> Surrogate:1,2-DCA-d4 83% 60-140 " <br /> Surrogate: Toluene-d8 82% 60-140 " <br /> Surrogate:4-BFB 83% 60-140 " <br /> NPI-65 0187(5309436-03)Water Sampled:09/18/03 08:20 Received:09/18/0313:50 <br /> Benzene 23 2.5 ug/1 5 3090318 09/24/03 09/25/03 EPA 8260B <br /> Toluene 16 2.5 " <br /> Ethylbenzene 98 2.5 " <br /> Xylenes(total) 130 2.5 " <br /> Methyl tert-butyl ether ND 2.S <br /> Gasoline(C6-C10) 1100 250 " <br /> Surrogate:1,2-DCA-d4 86% 60-140 " <br /> Surrogate:Toluene-d8 83% 60-140 " <br /> Surrogate:4-BFB 82% 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 he reproduced in its entirety. <br /> Page 3 of 8 <br />