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819 Sinker Ave Ste 8 <br /> S e q it Ol a Secram(915834 <br /> 6)92 99600 <br /> FAX(916)921 0100 <br /> Analytical www sequoialabs com <br /> Gettler-Ryan-Dublin Project Former Unocal 5098,Stockton,CA 5302592 <br /> 6747 Sierra Court,Ste J Protect Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03/10/03 17 17 <br /> Gasoline\BTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-18D 5302592-21 Water Sampled 02/19/03 13 40 Received 02/24/03 15 30 <br /> Benzene 51 050 ug/l 1 3020415 02/28/03 02/28/03 EPA 8260E <br /> Toluene 1 0 050 11 11 " " " <br /> Ethylbenzene 1 8 050 " <br /> Xylenes(total) 1 3 050 " <br /> Methyl tert-butyl ether ND 20 " <br /> Surrogate 1,1-DCA-d4 98% 60-140 " <br /> Surrogate Toluene-d8 113% 60-140 " <br /> Surrogate 4-BFB 106% 60-140 " <br /> MW-19S(5302592-22)Water Sampled 02/19/03 14 40 Received 02/24/03 15 30 <br /> Benzene ND 0 50 ugll 1 3020415 02/28/03 02/28/03 EPA 8260E <br /> Toluene ND - 0 50 <br /> Ethylbenzene 5 4 0 50 <br /> Xylenes(total) 18 0 50 " <br /> Methyl tent-butyl ether ND 2 0 " <br /> Surrogate 1,2-DCA-d4 98% 60-140 " <br /> Surrogate Toluene-d8 115% 60-140 " <br /> Surrogate 4-BFB 112% 60-140 " <br /> MW-191) (S302592-23} Water Sampled o2ii9tO3 t4 1j Receivea 02i24t0315 30 <br />=Benzene 1 0 0 50=ug/1 1 3020415=02126103=02128103=EPA 82608= <br /> Toluene 0 75 0 50 " <br />—Ethylbenzene <br /> Xylenes(total) 064 050 " <br /> T <br /> m Methyl tert-butyl ether-- - -- - ----ND-- 20-- -_- <br /> Surrogate 1,2-DCA-d4 99% 60-140 <br /> Surrogate Toluene-d8 116% 60-140 " <br />_..-`"Sur i agate 4*FB- - - -109 4%- 60-140- <br /> Sequoia <br /> 0-140 0 <br /> Sequoia Analytical - Sacramento The results in this i eporl apply to the samples analyzed in accoi dance with the chain o <br /> custody document Unless otherwise stared results are reported on a wee weight basis ' <br /> This analytical i eport must be reproduced in its entirety <br /> Page 16 of 126 <br />