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19 <br /> Sequoia 8ramnto CAe5834 <br /> Sacramento CA 99600 <br /> Analytical (916)921 9600 <br /> FAX(916)921 6100 <br /> www sequo:alabs com <br /> Gettler-Ryan -Dublin Project Former Unocal 5098,Stockton,CA 5308091 <br /> 6747 Sierra Court, Ste J Project Number N/A 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-6(S308091-07)Water Sampled 0810.5103 12 35 Received 08_105103 17 35 <br /> Benzene 37 050 ug/I 1 3080160 08/18/03 08/19/03 EPA 82608 ' <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) 066 050 " <br /> Methyl tert-butyl ether ND 20 <br /> Surrogate 1,2-DCA-d4 106% 60-140 <br /> Suri ogate Toluene-d8 97916 60-140 <br /> Surrogate 4-BFB 109% 60-140 <br /> MW-7(5308091-08)Water Sampled 08/05/03 09 50 Received 08/05/03 17 35 <br /> Benzene __ ND _ 050 ug/l i _3080160 _08118103 08/19/031 EPA 8260B _ <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND _ 050- <br /> Methyl <br /> 50.Methyl tert-butyl ether ND 2 0 <br /> Suri ogate 1 2-DCA-d4 101 % 60-140 " <br /> Surrogate Toluene-d8 97% 60-140 " <br /> Suri ogate 4-.BFB 101 °/a 60-140 " <br /> MW-8D(S308091-09)Water Sampled 08/05/03 14 15 Received 08/05/03 17 35 <br /> Benzene 14 050 ug/1 1 3080240 08/18/03 08/19/03 EPA 8260B <br /> Toluene 0 95----0 50 <br /> Ethylbenzene 3 2 050 " <br /> Xylenes(total) — --- -- =3 4 -- -=0 50 — - - — ----- - --- <br /> Methyl tert-butyl ether ND 2 0 <br /> Sur i ogate 1,2-DCA-d4 101 % 60-140 <br />_ _Sui i agate Toluene-d8- -102%- a 60-140 <br /> Suri ogale 4-BFB 99% 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 i eport must be rept oduced to its entirety <br /> Page l2 of 117 <br />