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819 Sinker Ave Ste 8 <br /> Snemrivnio,CA 95834 <br /> IDSequoia (916)921-9600 <br /> FAX(916)921-0100 <br /> ' Analytical www xyuoialabscom <br /> Iffir-Ryan-Dublin Project TOSCO 11192, Stockton,CA S305429 <br /> 6'wsietra Court,Ste J 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 /> Reportmg <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-5 5305429-05 Water Sampled 05/14103 16 25 Received 05/15/03 16 40 <br /> Vert-butyl alcohol ND 100 ug/l 1 3050437 05/27/03 05/27/03 EPA 8260E <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " ^ <br /> Ethanal ND 500 " <br /> 1,2-Dichloroethane ND 20 <br /> 1,2-Dibromoethane(EDB) ND 20 <br /> Surrogate 1,2-DCA-d4 125% 60-140 <br /> MW-6 S305429-06 Water Sampled 05/14/03 15 10 Received 05/15/03 16 40 <br /> Tert-butyl alcohol ND 100 ugn 1 3050437 05/27/03 05/27/03 EPA 8260B <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " '^ <br /> Tert-amyl methyl ether ND 20 " <br /> Ethanol ND 500 " <br /> ichloroethane ND 20 <br /> bromoethane(EDB) ND 20 <br /> Surrogate 1,2-DCA-d4 95% 60-140 " <br /> MW-75305429-0 Water Sampled 05/14/03 13 35 Received 05/15/03 16 40 <br /> Tert-butyl alcohol 140000 10000 USA 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-Dibromoethane(EDB) ND 200 <br /> Surrogate 1,2-DCA-d4 107% 60-140 <br /> Acetone ND 500 100 " <br /> Surrogate Dibromofluoromethane 100% 70-130 <br /> Surrogate 1,2-DCA-d4 107% 70-130 " <br /> Surrogate Toluene-& 105% 70-130 <br /> Surrogate 4-BFB 96% 70-130 " <br /> oia 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 10 of 23 <br />