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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4D (916)921-9600 <br /> IwAnalytical FAX(916)921-0100 <br /> www sequoialabs com <br /> SECOR International-Rancho Cordova Prosect ARCO 4493,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Prosect Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 06/17/02 11 52 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> An Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-9D S206162-04 Water Sampled 06/12/02 12 40 Received 06/13/02 11 10 <br /> Tert-butyl alcohol ND 25 ug/l 5 2060151 06/13/02 06/14/02 EPA 8260B <br /> Methyl tert-butyl ether 22 25 <br /> Di-Isopropyl ether ND 25 <br /> Ethyl tert-butyl ether ND 25 " <br /> Tert-amyl methyl ether ND 25 " <br /> Ethanol ND 250 " <br /> 1,2-Dichloroethane ND 25 <br /> 1,2-Dlbromoethane(EDB) ND 25 <br /> Surrogate 12-DCA-d4 112% 60-140 <br /> MW-101W 5206162-05 Water Sampled 06/12/0216 15 Received 06/13/0211 10 <br /> Tert-butyl alcohol ND 50 ug/1 1 2060151 06/13/02 06/14/02 EPA 8260B <br /> Methyl tert-butyl ether 58 050 <br /> Di-Isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 <br /> ert-amyl methyl ether ND 050 <br /> thanol ND 50 <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(ED$) ND 050 <br /> Surrogate 1,2-DCA-d4 117% 60-140 <br /> MW-10D(5206162-06)Water Sampled 06/12/02 16 48 Received_ 06/13/02 11 10 _ <br /> Tert-butyl alcohol ND 50 ug/l 1 2060151 06/13/02 06/14/02 EPA 82608 <br /> Methyl tert-butyl ether 31 050 <br /> DI-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> Ethanol ND 50 " <br /> 1,2-Dichloroethane ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Surrogate 12-DCA-d4 118% 60-140 <br /> equoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page Page 5 of 9 <br />