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819 Sen , Ave Ste 8 <br /> D <br /> Sequoia Sacramento,CA 95834 <br /> V,W Analytical FAX(9]6)921-9600 <br /> (916)921-0100 <br /> Ryan-Dublin Project Former Unocal 0187,Stockton,CA S211332 <br /> 6747 Sierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12/27/02 17 49 <br /> GasolmelBTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> NP-1-22 5211332-28 Water Sam led 11106/0216.51 Received 12/02 09 45 <br /> Benzene 054 050 ug/l 1 2110312 11/20/02 11/20/02 EPA 8260E <br /> Toluene ND 050 " <br /> Ethylbenzene 1 7 050 <br /> Xylenes(total) 43 1 0 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Gasoline(C6-C10) 110 50 <br /> Surrogate 11-DCA-d4 122% 60-140 " <br /> Surrogate Toluene-d8 102% 60-140 " <br /> Surrogate 4-BFB 95% 60-140 <br /> NP-2-60 S211332-32 Water Sampled 11/061021624 Received 11/12/02 09 45 <br /> Benzene 12 050 ug11 1 2110312 11/20/02 11/20/02 EPA 8260E <br /> Toluene ND 050 " <br /> Ethylbenzene 0.71 050 " <br /> S(total) ND 1 0 <br /> tert-butyl ether ND 050 <br /> Gasoline(C6-C10) 170 50 <br /> Surrogate 12-DCA-d4 116% 60-140 " <br /> Surrogate Toluene-d8 97% 60-140 " <br /> Surrogate 4-BFB 92 % 60-140 " <br /> P-2-116(S211332-33)Water Sampled 11/06/021525 Receive 11/12/0209.45 <br /> Benzene 11 050 ug/1 1 2110312 11/20/02 11/20/02 EPA 8260B <br /> Toluene ND 050 <br /> Ethylbenzene 063 050 " <br /> Xylenes(total) ND 10 <br /> Methyl tert-butyl ether ND 050 <br /> Gasoline(C6-C10) 150 50 " <br /> Surrogate 12-DCA-d4 122% 60-140 <br /> Surrogate Toluene-d8 101 % 60-140 <br /> Surrogate 4-BFB 92% 60-140 " <br /> Amik <br /> to Analytical-Sacramento The i esults in this i eport apply to the samples analyzed in accordance with the chain <br /> Of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 16 of 41 <br />