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(D (916) <br /> 8]9 Straker AveSeSequoia Sacramento,CA9583q921-9666 <br /> Analytical FAX t <br /> (91 b)921-0100 <br /> www sequoislabs cam <br /> Gettler-Ryan-Dublin Project Unocal 5098, Stockton,CA S210010 <br /> 6747 Sierra Court, Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 10/34/02 18 46 <br /> GasolinelBTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte - Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-17(5210010-20)Water Sampled 09/22/02 17 23 Received 09/26/02 18 35 <br /> Tert-butyl alcohol ND 5 0 ug/l 1 2100066 10103102- 10/04/02 EPA 8260B <br /> Methyl tert-butyl ether 22 - 050 " " " " " ++ <br /> Di-isopropyl ether ND 050 " 11 <br /> Ethyl tert-butyl ether ND 050 ^ " <br /> Tert-amyl methyl ether ND 050 <br /> 1,2-Dichloroethane ND 050 <br /> 1 2-Dtbromoethane(EDB) ND 050 " <br /> Surrogate Toluene-d8 114% 60-140 t ^ <br /> Surrogate 4-BFB 111 % 60-140 " <br /> Suirogate 1,2-DCA-d4 103 % 60-140 ^ <br /> MW-17(5210010-2ORE 1)Water Sampled 09/22/021723 Received 09/26/021835 <br /> Benzene - - - 8 9 050 - ug/1 1 2100083 10/04/02 10104102- EPA 8260B <br /> Ethylbenzene 76 0 50 " <br /> Toluene 6 6 050 <br /> Xylenes(total) 31 0 50 " <br /> Suri agate Toluene-d8 107% 60-140 " ^ <br /> Surrogate 4-BFB 104% 60-140 " <br /> Surrogate 1,2-DC,444 172 % 60-140 ^ <br /> NNW-18(S210010-21)Water Sampled 09/23/02 14 45 Received 09/26/02 18 35 <br /> =-Tert-butyl alcohol ND 5 OTugn 1 2100085-110105/0210/05102�EPA 826oB <br /> Methyl tert-butyl ether ND 050 <br /> —Di-isopropyl ether - - - -----_ -=---ND -------0 - <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether -- -----ND- - __050 <br /> 1,2-Dtchloroethane 3 0 050 <br /> 1,2-Dtbromoethane(EDB) ND 050 <br /> `-`-Benzene -� __.� _., _ _ - ----ND--` --0 50---"-_-- - -„ <br /> Ethylbenzene ND 0 50 <br /> Toluene ND 0 50 <br /> Xylenes(total) ND 0 50 <br /> Surrogate Toluene-d8 111 % 60-140 " " -r-- <br /> Sui rogate 4-BFB 114 % 60-140 " <br /> Suirogate 1,2-DCA-d4 118% 60-140 ^ ^ <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated,results are t eported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 19 of 119 ' <br />