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819 Stoker Ave Ste 8 <br /> 4DI 1 Sequoia Sacramerno CA 95834 <br /> (916)921 9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> Gettler-Ryan-Dublin Project TOSCO 11192,Stockton,CA S305429 <br /> 6747 Sierra Court,Ste ] Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 05/29/03 17 15 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 (S305429-02)Water Sampled 05/14/03 16 55 Received 05/15/03 16 40 <br /> Tert-butyl alcohol 2100 1000 ug/1 10 3050449 05/27/03 05/27/03 EPA 8260B <br /> Di-isopropyl ether ND 20 1. " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Ethanol ND 5000 " <br /> 1,2-Dichloroethane ND 20 " <br /> 1,2-Dibromoethane(EDB) ND 20 It H " <br /> Surrogate 1,2-DCA-d4 129% 60-140 It " <br /> MW-3(S305429-03)Water Sampled 05/14/03 14 25 Received 05/1.5103 16 40_ <br /> Tert-butyl alcohol 120000 10000 ug/1 100 3050475 05/27/03 05/28/03 EPA 8260B 0-10 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Ethanol ND 50000 " <br /> 1,2-Dichloroethane ND 200 " <br /> 1,2-Dibrornmthane(EDB) ND 200 - <br /> Surrogate 1,2-DCA-d4 106% 60-140 " <br /> Acetone ND 500 <br /> Surrogate Dtbromofluoromethane 101 % 70-130 " <br /> Surrogate 1,2-DCA-d4 106% 70-130 <br /> Surrogate Toluene-d8 104% 70-130 " <br /> Surrogate 4-BFB 92% 70-130 " <br /> MW4 S305429-04 Water Sampled 05/14/03 15 45 Received 05/15/03 16 40 <br /> Tert-butyl alcohol ND 100 u9A 1 3050437 05/27/03 05/27/03 EPA 8260B <br /> Di-isopropyl ether ND 20 11 " <br /> Ethyl tent-butyl ether ND 2 0 <br /> Tert-amyl methyl ether ND 20 " <br /> Ethanol ND 500 " <br /> 1,2-Dichloroethane ND 20 " <br /> 1,2-Dibromoethane(EDB) ND 20 " <br /> Surrogate 1,2-DCA-d4 _ 126% 60-140 " <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document Unless otherwise stated results are reported on a wet weight bast. <br /> This analytical report must be reproduced in its entirety <br /> Page 9 of 23 <br />