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819 Sinker Ave Ste 8 <br /> ID Se uola Sa«sin(9to.CA 95834 <br /> q (916)921-9600-96M <br /> FAX(916)921 A 100 <br /> Wo Analytical www segiiuialabscom <br /> Ryan-Dublin Project Former Unocal 2859,Stockton,CA 5305466 <br /> Sierra CourtSte J Prosect Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06/03/03 18 41 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batrih Prepared Analyzed Method Notes <br /> MW-11 S305466-12 Water Sampled 05119103 14 15 Received 0511910317-10 R-05 <br /> Tert-butyl alcohol ND 250 ugA 50 3050528 05/31/03 05/31/03 EPA 8260B <br /> Methyl tert-butyl ether ND 25 1. It " <br /> Di-isopropyl ether ND 25 It " <br /> Ethyl tert-butyl ether ND 25 H " " <br /> Tert-amyl methyl ether ND 25 " <br /> 1,2-Dichloroethane ND 25 <br /> 1,2-Dibromoethane(EDB) ND 25 " <br /> Surrogate 1,2-DCA-d4 113 % 60-140 " <br /> MW-12 5305466-13 Water Sampled 05/19/03 12 50 Received 05/19/03 17 10 <br /> Tert-butyl alcohol ND 5 0 ug/l 1 3050528 05/31/03 05/31/03 EPA 8260B <br /> Methyl tert-butyl ether ND 050 It " <br /> Di-isopropyl ether ND 0 50 " <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 " " <br /> -1 chloroethane ND 0 50 " <br /> bromoethane(EDB) ND 050 " <br /> Surrogate 1,2-DCA-d4 114% 60-140 " <br /> MW-13 5305466-14 Water Sam led 05/19/03 10 55 Reeeived 05/19/0317 10 <br /> Tert-butyl alcohol ND 50 ug/l 1 3050528 05/31/03 05/31/03 EPA 82608 <br /> Methyl tert-butyl ether ND 0 50 1. " <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> Surrogate 1,2-DCA-d4 125% 60-140 <br /> ola 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 report must be reproduced in its entirety <br /> Page 1 l of 20 <br />