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1 <br /> ® Sequoia 819 Striker Ave Ste 4 <br /> m <br /> Sacraentoto CA 958834 <br /> (916)921-900 <br /> . Analytical FAX(916)9210100 <br /> www sequoialabs com <br /> Geological Technics,Inc Project Montas Bros S501355 <br /> ' 1101 7th Street Protect Number 724 2 Reported <br /> Modesto CA,95354 Project Manager Mandeep Singh 01/28/05 t 1 51 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> ' Sequoia Analytical- Sacramento <br /> Reportmg <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method No <br /> ' MW-208(5501355-17)Water Sampled 01/13/05 12 14 Received 01/14/05 08 20 <br /> Tert-butyl alcohol ND 50 ug/l 1 5010324 01/23/05 01/24/05 EPA 8260E <br /> Methyl tert-butyl ether ND 050 <br /> D1-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-Dtbromoethane(EDB) ND 050 <br /> Surrogate 1,2-DCA-d4 105% 60-140 <br /> MW-209(5501355-18)Water Sampled 01/12/05 14 38 Received 01/14/05 08 20 <br /> ' Tert-butyl alcohol ND 5 0 ug/1 1 5010324 01/23/05 01/24/05 EPA 8260B <br /> Methyl tert-butyl ether 88 050 " <br /> DL-isopropyl ether ND 050 <br />�rt- cert-butyl ether ND 050 <br /> rt-amyl methyl ether ND 050 <br /> ,2-Dichloroethane ND 050 <br /> 1,2-Dtbromoethane(EDB) ND 050 <br />' Surrogate 12-DCA-d4 103% 60-140 " " <br /> MW-210(S501355-19)Water Sampled 01/13/05 10 50 Received 01/14/05 08 20 <br /> Tert-butyl alcohol ND 50 ug/1 1 5010324 01/23/05 01/24/05 EPA 8260B <br />' Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tent-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 " <br />' 1,2-Dlchloroethane ND 050 <br /> 1,2-Dtbromoethane(EDB) ND 050 " <br /> Surrogate 1,2-DCA-d4 105% 60-140 " <br /> 1 <br /> Sequoia 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 we/weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 14 of 19 <br />