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819 St <br /> Ave Ste 8 <br /> Sequoia SacramentocCA 95834 <br /> (916)921-9600 <br /> 9 Analytical FAX(916)921-0100 <br /> IDwww sequoselabs com <br /> *; <br /> r-Ryan-Dublin Project Former Unocal 5098,Stockton, CA 5302592 <br /> Siena Court,Ste d Project Number N/A Reported <br /> Dublin CA, 94568 Project Manager Deanna L Harding 03/10/03 17 17 <br /> Gasollne\BTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> W-12 5302592-13 Water Sampled 02/20/03 14 25 Received 02/24/03 15 30 <br /> Benzene 14 050 ug/1 1 3030088 03/06/03 03/06/03 EPA 82608 <br /> fyluene ND 050 <br /> hylbenzene ND 050 <br /> lenes(total) 0 51 050 <br /> Methyl tett-butyl ether ND 2 0 <br /> rrogate 1,2-DCA-d4 116% 60-140 <br /> ...gale <br /> Toluene-d8 I17% 60-140 <br /> Surrogate 4-BFB 98% 60-140 <br /> W-13 5302592-14 Water Sampled 02/19/03 12 35 Received 02/24/03 15 30 _ <br /> enzene 20 050 ug/1 1 3020415 02/28/03 02/26/03 EPA 9260B <br /> Toluene ND 050 <br /> tenes <br /> ylbenzene 069 05Q <br /> (total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 <br /> to 1,2-DCA-d4 97% 60-14010 " <br /> ate Toluene-d8 109% 60-140 <br /> Surrogate 4-BFB 108% 60-140 <br /> W-14 5302592-I5 Water Samled 02/18/03 17 50 Received 02/24/03 15 30 <br /> Benzene ND 050 ug/1 1 3020415 02/28/03 02/28/03 EPA 8260B <br /> Toluene ND 050 <br /> thylbenzene ND 050 " <br /> ylenes(total) ND 050 <br /> ethyl tert-butyl ether ND 2 0 " <br /> rrogate 1 2-DCA-d4 98% 60-140 <br /> fri agate Toluene-d8 111 % 60-140 <br /> ri ogate 4-BFB 110% 60-140 <br />■ <br /> S a Analytical - Sacramento The results in this repo;t apply to the samples analy2ed in accordance wuh the chain of <br />' custody document Unless otherwise stared results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br />' Page 13 of 126 <br />