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819 Sinker Ave Ste 8 <br /> Sequoia Sacnniento,CA 99600 <br /> (9 16)921-9600 <br /> Analytical _ wwseqFAX(9 6ialabs 100 <br /> �7� www sequo�alabs corn <br /> Gettler-Ryan-Dublin Project Former Unocal 5098,Stockton,CA 5302592 <br /> 6747 Sierra Court, Ste 1 Project 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-22D(S302592-27)Water Sampled 02/21/03 10 00-Received 02/24103 15 30_- <br /> Benzene 095 050 ug/l 1 3030088 03/06/03 03/06/03 EPA 8260B <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 <br /> Surrogate 1,2-DCA-d4 110% 60-140 " <br /> Surrogate Toluene-d8 113 % 60-140 " <br /> Surrogate 4-BFB 99% 60-140 <br /> MW-23S(5302592-28)Water Sampled 02/19/03 15 15 Received 02/24/03 1-5-30 <br /> Benzene 1 3 050 ug/l 1 3030025 03/04/03 03/04/03 _. EPA 8260B <br /> Toluene - 0 65 0 50 <br /> Ethylbenzene 060 050 " <br /> Xylenes(total) 074 050 " <br /> Methyl tert-butyl tither ND 2 0 <br /> Surrogate 1,2-DCA-d4 104 % 60-140 " <br /> Surrogate Toluene-d8 112 % 60-140 " <br /> Suri ogate 4-BFB 104 % 0 " <br /> MW-23D(5302592-29)Water Sampled 02/19/03 15 50 Received 02l24/03 15 30 <br /> Benzene 073— 0 50ug/1 ] 3030025-03/04/03 03/04/03 EPA 8260B— _ <br /> Toluene 055 0 50 <br /> - - -- ---r ----ND----0-50--' <br /> - — -- <br /> Ethylbenzene _— T- ND�-TO_50--„ — —„ -„- T-„- - -„----- -„- - - -- <br /> Xylenes(total)- _ _ ND 050 _ <br /> Methyl tert-bury]ether ND 2 0 ” <br /> Surrogate 1,2-DCA-d4 101 % 60-140 <br /> Surrogate Toluene-d8 _ _ _ 119% _ _60-14_0 <br /> Surrogate 4-BFB 103 % 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 stared results are reported an a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 18 of 126 i <br />