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Sequoia 819 Striker CA Ste 8 <br /> a— ) <br /> Sacramentoto,CA 95834 <br /> Analytical (916)921-9600 <br /> I+AX(916)92]-0100 <br /> www sequoislabs com <br /> Gettler-Ryan -Dublin Project Unocal 5098, Stockton,CA 5210010 <br /> 6747 Sierra Court, Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 10/14/02 18:46 #1 <br /> GasohneWEMOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result - -Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-AS26(5210010-36)Water Sampled 09/24/02 18 06 Received- 09/26/02 18 35 HT-04 <br /> Tert-butyl alcohol ND 5 0 ugA 1-- 2100173 10t09102 10/09/02 EPA 8260B <br /> Methyl tett-butyl ether - ND 050 - <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 " <br /> Ten-amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> Benzene ND 050 " <br /> Ethylbenzene ND 050 <br /> Toluene ND 050 <br /> Xylenes(total) 064 050 " <br /> Suri agate Toluene-d8 113% 60-140 <br /> Surrogate 4-BFB 110% 60-140 <br /> Surrogate 12-DC.4-d4 119% 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 i eproduced in its entirety <br /> Page 27 of 119 ' <br />