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819 Striker Ave Ste 8 <br />^Y� • Sacramento, 92 95834 <br /> -9600 <br /> Sequoia (916)921-9600 <br /> Analytical www <br /> seq 6) labs92 1 c m0 <br /> www sequoialabs com <br /> G yan-Dublin Project Former Unocal 0187,Stockton,CA 5302221 <br /> 6747 Sierra Court,Ste 3 Protect Number NIA 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-5 5302221-06 Water Sampled 02/06/03 10 40 Received 02/47/03 10 30 <br />.-ert-butyl alcohol ND 100 ugA 1 3020263 02/19/03 02/20/03 EPA 8260B <br /> Methyl tert-butyl ether ND 2 0 , <br /> " <br />]i-isopropyl ether ND 20 „ <br /> 3ND 20thyl tent-butyl ether <br /> Tert-amyl methyl ether ND 2 0 " <br /> Surrogate 1,2-DCA-d4 102% 60-140 " <br /> U-6 5302221-07 Water Sampled 02/06/030755 Received 02/07/03 10 30 <br /> Tert-butyl alcohol ND 100 ug/l 1 3020263 02/19/03 02/20/03 EPA 82608 <br /> 1 11 <br /> Methyl tert-butyl ether ND 2 0 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 2 0 „ <br /> 1, <br /> Tert-amyl methyl ether ND 20 " <br /> Surrogate 1,2-DCA-d4 102% 60-140 " <br /> U 02221-08 Water Sampled 02/06/03 14 45 Received 02/07/03 10 30 <br /> Te tyl alcohol ND 100 u811 1 3020263 02/19/03 02/20/03 EPA 82608 <br /> 0 " <br /> Methyl tert-butyl ether ND 2 <br /> " <br /> Di-isopropyl 20isopropyl ether „ <br /> Ethyl tert-butyl ether ND 2 0 <br /> Tert-amyl methyl ether ND 2 0 " <br /> Surrogate 1,2-DCA-d4 <br /> 102916 60-140 " <br /> U-8 S302221-09 Water Sampled 02/06/03 16 20 Received 02/07/03 10 30 <br /> Tert-butyl alcohol ND 100 ugA 1 3020263 02/19/03 02/20/03 EPA 82605 <br /> " 11 <br /> Methyl cert-butyl ether ND 2 0 <br /> 20 " <br /> Di-isopropyl ether ND <br /> Ethyl tert-butyl ether ND 2] 0 , <br /> Tert-amyl methyl ether <br /> ND 2 0 <br /> Surrogate 1,2-DCA-d4 <br /> 105 % 60-140 " <br /> la Analytical -Sacramento The results in this report apply 10 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 16 of 33 <br />