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819 Striker Ave Ste 8 <br /> Sacramento,CA 95834 <br />(D Sequoia (916)921-9600 <br /> 100 <br /> Analytical www <br /> seq 6Lalabs om <br /> 1W i <br /> www sequoialabs coin <br /> G yan-Dublin Project Former Unocal 0187,Stockton,CA 5302221 <br /> 6747 Sierra Court,Ste 7 Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 02/28/03 19 02 <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 /> J-21 S302221-22 Water Sampled 02/05/03 09 30 Received 02/07/03 10 30 <br /> Cert-butyl alcohol ND 100 ugll 1 3020233 02/18/03 02!18103 EPA 8260B <br /> Aethyl tert-butyl ether ND 2 0 " <br /> " <br /> Di-isopropyl ether 2 4 2 0 " <br /> Ethyl tert-butyl ether ND 2 0 " <br /> reit-amyl methyl ether ND 2 0 <br /> Surrogate 1,2-DCA-d4 115% 60-140 <br /> U-22 5302221-23 Water Sam led 02!05!03 08 25 Received 02/07/03 10 30 <br /> Tert-butyl alcohol ND 100 ug/l 1 3020233 02/18/03 02118/03 EPA 9260B <br /> Methyl tent-butyl ether ND 20 <br /> " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> Tert-amyl methyl ether ND 20 " <br /> Surrogate 1,2-DCA-d4 98% 60-140 <br /> U 302221-24 Water Sampled 0210510307-45 Received 02/07/03 10 30 <br /> TeWtyl alcohol ND 100 ugll 1 3020233 02/18/03 02/18/03 EPA 82608 <br /> " <br /> Methyl tert-butyl ether ND 20 <br /> " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 „ <br /> Tert-amyl methyl ether ND 20 " <br /> Surrogate 1,2-DCA-d4 98910 60-140 " <br /> U-24 S302221-25 Water Sampled 02/05/03 11 25 Received 02/07/03 10 30 <br /> l 3020233 02116!03 021]9103 EPA$26DB <br /> Tert-butyl alcohol ND 100 ugll <br /> Methyl tert-buryND 20]ether „ <br /> " <br /> Di-isopropyl 20lsopropyl ether <br /> " <br /> Ethyl tent-butyl ether ND 20 „ <br /> Tert-amyl methyl ether ND 2 0 " <br /> Surrogate 1,2-DCA-d4 <br /> 96°/n 60-140 " <br /> oto 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 20 of 33 <br />