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SSequoia 819 SenAve Ste 6 <br /> Sacramento cramentoto CA 99830 <br /> j <br /> (916)921-9600 <br /> Analytical FAX(916)921 0100 <br /> www sequntalabs tom <br /> Gettler-Ryan -Dublin Project Former Unocal 5098,Stockton, CA 5308091 <br /> 6747 Sierra Court, Ste J Project Number NIA Reported <br /> Dublin CA, 94568 Project Manager Deanna L Harding 08/20/03 16 56 <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 /> MW-15(5308091-18)Water Sampled 08/04/031030 Received 08/05/03 17 35 <br /> Benzene 075 050 ugA 1 3080141 08/12/03 08/13/03 EPA 8260B <br /> Toluene 050 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) 0 79 050 <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate 1,2-DCA-d4 110% 60-140 " <br /> Surrogate Toluene-d8 101% 60-140 " <br /> or <br /> Surrogate 4-BFB 110% 60-140 ; _ <br /> MW-16(5308091-19)Water Sampled 08/03/03 15 35 Received 08/05/03 17 35 <br /> _Benzene 160 - 050 ug/l_ 1 r _ 3080141 08/12/03 08/13/03, EPA 8260E <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 101% 60-140 or �- <br /> Sur rogate Toluene48 97% 60-140 <br />_ Surrogate 4-BFB 1 Oa% h0-140 <br /> MW-17(5308091-20)Water Sampled 08/03/03 11 05 Received 08/05/03 17 35 <br /> Benzene ND 050 ug/1 1 3080117 08/11/03 08/12/03 EPA 8260B —� <br />.Toluene— - -- —— ---- -- —--- ND—---0 50 <br />_ Ethylbenzene ND 050 <br /> Xylenes(total) - - - - ---- --- --- -ND ----050 - - - -"- - --- <br /> Methyl tert-butyl ether ND 20 <br /> Surrogate 1,2-DCA-d4 120% 60-140 " <br /> -Suri ogate-Toluene-d8 - - - _ - __ _ -- 98%- - - 60-140- -1-- <br /> Surrogate 4-BFB 119% 60-140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in actor-dance with the chain of <br /> custody document Unless otherwise stated,r esults are reported on a wet weight basis <br /> This analytical report must be reproduced to its entirety <br /> Page 16 of 117 <br />