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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento.CA 95834 <br /> (916)921-96M <br /> Analytical FAX(916)421-0100 <br /> www.sequoialabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> 3334 Cameron Park Dr.Ste 550 Project Number: 5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Say Johnson 45/03/02 15:45 <br /> i <br /> Volatile Organic Compounds by EPA Method 826013 <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared ,Analyzed Method Nous <br /> MW-7(5204377-07)Water Sampled: 04/23/02 04:58 Received: 04/23/02 13:00 <br /> Ethylene dibromide ND 0.50 ug/l 1 2040346 04/29/02 04/29/02 EPA 8260B <br /> Tert-butyl alcohol ND 5.0 <br /> Methyl tent-butyl ether' 110 0.50 " <br /> Di-isopropyl ether ND 4.50 ^ " <br /> Ethyl tent-butyl ether ND 0.50 <br /> Tert-amyl methyl ether ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 <br /> Surrogate: 1,2-DCA-d4 108% 60-140 <br /> MW-8,(S204377-08)Water Sampled: 04/23/02 05:57 Received: 04/23/02 13:00 A-01 <br /> Ethylene dibromide ND 500 ugll 1000 2040346 04/29/02 04/29/02 EPA 8260B <br /> Tert-butyl alcohol ND 5040 " <br /> ethyl tert-butyl ether 26000 500 " <br /> Wthisopropyl ether ND 500 <br /> y]tert-butyl ether ND 500 ^ <br /> Tert-amyl methyl ether ND 500 ^ <br /> 1,2-Dichloroethane ND 500 <br /> Surrogate: 1,2-DC444 108% 60-140 " <br /> MW-9(5204377-09)Water Sampled: 04/23/02 05:32 Received: 04/23/02 13:00 <br /> Ethylene dibromide ND 0.50 ug/i 1 2040346 04/29/02 04/29/02 EPA 6260E <br /> Tert-butyl alcohol ND 5.4 " ^ <br /> Methyl tert-butyl ether ND 0.50 <br /> Di-Isopropyl ether 4.5 0.50 <br /> Ethyl tert-butyl ether ND 0.50 „ <br /> Tert-amyl methyl ether ND 0.50 " n <br /> 1,2-Dichloroethane 19 0.50 + ^ <br /> Surrogate: 1,2-DCA-d4 110% 60-140 <br /> epoia 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 7 of 14 <br />