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819 <br /> Ave Ste 8 <br /> Sequoia Sacramento,o,CA 95834 <br /> Analytical (916)921-9600 <br /> FAX(916)92 1-0100 <br /> www sequoiaiabs corn <br /> ettler-Ryan-Dublin Project Unocal 5098,Stockton CA <br /> Stena Court, Ste l 52100I0 <br /> Project Number NIA Reported <br /> n CA,94568 Project Manager Deanna L Harding 10/14/02 18 46 <br /> Gasollne\BTMOaygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> alyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-12 (S210010-14)Water Sampled 09/23/02 13 32 Received 09/26/02 18 35 <br /> t-butyl alcohol ND 50 ug11 10 2100085 10/05/02 10/05/02 EPA 82608 <br /> thyl tert-butyl ether ND 5 0 <br /> Di-isopropyl ether ND 5 0 „ <br />�yl tert-butyl ether ND 5 0 <br /> t-amyl methyl ether ND 5 0 <br /> 1,2-D{chloroethane 10 5 0 <br /> JYD' <br /> bromoethane(EDB) ND 5 0 <br /> zene 31 5 0lbenzene 14 5 0 <br /> Toluene 27 5 0 " <br /> enes(total) 28 5 0 „ <br /> rogate Toluene-d8 119% 60-140 <br /> Surrogate 4-BFB 115% 60-140 „ <br /> ogate 1,2-DCA-d4 114% 60-140 <br /> -13 5210010-15 Water Sampled 09/23/0215 20 Received 09/26/02 18 35 <br /> cert-butyl alcohol ND 5 0 ug/l 1 2100085 10/05/02 10/05/02 EPA 8260E <br /> Mert-butyl ether ND 050 <br /> opyl ether ND 050 <br /> „ <br />,thy]tent-butyl ether ND 050 " „ <br /> tl <br /> amyl methyl ether ND 050ichloroethane ND 0 50 " <br /> tbromoethane(EDB) ND 050 <br /> „ <br /> 3enzene ND 050 <br /> l]benzene ND 0 50 <br /> ene 082 050 „ <br /> ylenes(total) 058 0 50 " „ <br /> togate Toluene-d8 112% 60-140 <br /> gate 4-BFB 115% 60440 H <br /> urtogate 1,2-DCA-d4 121 % 60-140 <br /> oia Analytical - Sacramento 1'he i esulrs 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 i epos t must be i eprodueed in its entirety <br /> Page 16 of 119 <br />