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I <br /> Sequoia 819 5tnto,CA 5834 <br /> Sacramento, 92 996M <br /> (916)921-9600 <br /> ivwAnalytical FAX(90100 <br /> www sequoiala¢oialabs cam <br /> Gettler-Ryan-Dublin Prosect Former Unocal 5098,Stockton,CA S302592 <br /> 6747 Sierra Court,Ste ] Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03/10/03 17 17 <br /> Ell GasolinelBTEMOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-14A (5302592-16)Water Sampled 02/18/03 17 20 Received 02/24/03 15 30 <br /> Benzene 34 050 ug/1 1 3020415 02/28/03 02/28/03 EPA 8260B <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 20 <br /> Surrogate 1,2-DCA-d4 95% 60-140 " <br /> Surrogate Toluene-d8 114% 60-140 " <br /> Surrogate 4-BFB 106% 60-140 <br /> MW-115(S302592-17)-Water Sampled 02/19/031045 Received 02/24/03 15 30 <br /> Benzene ND 050 ug/I 1 3020415 02/28/03 02/28/03 EPA 82450B <br /> Toluene 16 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) 1 7 050 " <br /> Methyl tert-butyl ether ND 2 0 _ " - <br /> Surrogate 12-DCA-d4 98% 60-140 " <br /> Surrogate Toluene-d8 113% 60-140 <br /> Sui rogate 4-BFB 112% '60-140 " <br /> Tvt w-16 5302592-18) n ater Samp ieo 02119t03 11 55 iteceiveo 62124m3 15 30 <br /> Toluene 1 4 0 50=ug/] 1 3020415=02128/03-02128103—EPA 8260B—____— <br /> Ethylbenzene 64 0 50 " <br /> —Xylenes(total) -- -r —4 0- -0 50 -- <br /> Methyl tert-butyl ether ND 2 0 " <br /> -Surrogate 1 2-DCA-d4- -� T - ___ - 96°% 60-140 <br /> Surrogate Toluene-d8 110% 60-140 <br /> Surrogate 4-BFB 115% 60-140 11 " " <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain ofIRD <br /> custody document Unless otherwise stated,results are reported on a wet weight halts <br /> This analytical report must be reproduced to its entirety <br /> Page 14 of 126 <br />