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•I Y 819 Striker Avenue Suite 8 <br /> ' <br /> Sequoia Sacramento CA 95834 <br /> (91 G)921-9600 <br /> FAX(916)92 t-0100 <br /> Analytical <br /> ' nalt cal www sequoialabs com <br /> Stratus Environmental Project ARCO 2168,Stockton,CA <br /> 3330 Cameron Park Drive,Ste 550 Project Number 2168,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 06/21/02 12 35 <br /> Volatile Organic Compounds by EPA Method 82605 <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Ums Dilution Batch Prepared Analyzed Method Notes <br /> MW-6(S206169-0I)Water Sampled 06/13/020550 Received 06/13/02 12 10 R-05 <br /> Tert-butyl alcohol ND 250 ug/1 50 2060166 06/14/02 06/14/02 EPA 826DB <br /> Methyl tert-butyl ether ND 25 " <br /> Di-isopropyl ether ND 25 " <br /> Ethyl tert-butyl ether ND 25 " <br /> Tert-amyl methyl ether ND 25 " <br /> 1,2-Dichloroethane 140 25 <br /> Surrogate 1,2-DCA-d4 101 % 60-140 " <br /> MW-7(5206169-02)Water Sampled 06/13/02 05 30 Received 06/13/02 12 10 <br /> Tert-butyl alcohol ND 50 tig/l 1 2060204 06/18/02 06/18/02 EPA 8260B <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 0 50 " <br /> Ethyl tent-butyl ether ND 050 " <br /> rt-amyl methyl ether ND 050 <br /> INW,2-Dichloroethane ND 050 " <br /> Surrogate 12-DCA-d4 112% 60-140 " <br /> MW-8(5206169-03)Water Sampled 06/13/020646 Received 06/13/02 12 10 <br /> Tert-butyl alcohol ND 5 0 ugli 1 2060166 06/14/02 06/14/02 EPA 8260E <br /> Methyl tent-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane 2 3 0 50 <br /> Surrogate 12-DCA-d4 119% 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 4 of 12 <br />