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819 Sinker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> tl� (916)921-9600 <br /> ► Analytical wwseFAX uoisia16)92 scom <br /> www nequaalabs com ' <br /> Gettler-Ryan-Dublin Project Former Unocal 5098,Stockton,CA S302592 <br /> 6747 Sierra Court,Ste 3 Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 0111010117 17 <br /> GasohneWEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting - <br /> Anaiyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes ' <br /> I <br /> MW-25D(S302592-33)Water Sampled 02/18/031645 Received 02/24/03 15 30 <br /> Benzene 36 050 ug/l 1 3030025 03/04/03 03/04/03 EPA 8260B <br /> Toluene 24 0 50 ' <br /> Ethylbenzene 52 050 " <br /> j Xylenes(total) 160 050 " <br /> Methyl tert-butyl ether NO 2 D <br /> Surrogate 1,2-DCA-d4 94% 60-140 " <br /> Surrogate Toluene-d8 104% 60-140 " <br /> Surrogate 4-BFB 108 % 60-140 " <br /> MW-27(5302592-34)Water Sampled 02/21/03 12 35 Received 02/24/0315 30 <br /> Benzene NO 050 ug/1 1 3030099 03/06/03 03/07/03 EPA 8260B <br /> Toluene 097 0 50 " <br /> Ethylbenzene NO 0 50 r ' <br /> Xylenes(total) 1 2 050 " <br /> Methyi tert-butyl ether _ NO 2 0 " <br /> Surrogate 1,2-DCA-d4 120% 60-140 ' <br /> Surrogate Toluene-d8 109% 60-140 " <br /> Surrogate 4-BFB 100% 60-140 " <br /> AS-26(5302592-35)Water Sampled 02/21/03 11 55 Received 02/24/03 15 30 i <br /> Benzene ND 0 50—ug/1 l— 030099=03/06103- 03/07/03—EPA 8260B�— __T <br /> Toluene NO 0 50 " <br /> Ethylbenzene-- ND= 050--- <br /> Xylenes <br /> 50---Xylenes(total) 0 51 050 " <br /> —Methyl tert-butyl ether=----- — -- --ND------ 2 0—� -- --- -- =_- — -- ---- - ---- - ===- <br /> Surrogate 1,2-DCA-d4 114 % 60-140 " <br /> Surrogate Toluene-d8 110% 60-140 " <br /> —"Su'riogaie 4=BFB-- ` — - - - — 96% "--`60=140 <br /> y 1 <br /> 1 <br /> 1 <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 i esults are reported on a wet weight basis 1 <br /> This analytical repoi t must be reproduced in its enitrety <br /> Page 20 of 126 1 <br />