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Sequoia <br /> 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analyf cal FAX(916)921-0100 <br /> www.seq u o ialabs.corn <br /> Stratus Environmental Project: ARCO 5469, Stockton,CA <br /> 3330 Cameron Park Drive,Ste. 550 Project Number: 5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 10/14/02 16:55 <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 /> MW-4(S209427-04)Water Sampled: 09/19/02 08:06 Received:09/19/02 09:30 <br /> Tert-butyl alcohol ND 250 ug/l 50 2100002 10/01/02 10/01/02 EPA 8260B <br /> Di-isopropyl ether ND 25 <br /> Ethyl tert-butyl ether ND 25 <br /> Tert-amyl methyl ether ND 25 " <br /> Ethanol ND 2500 <br /> 1,2-Dichloroethane ND 25 <br /> 1,2-Dibromoethane(EDB) ND 25 <br /> Surrogate: 1,2-DCA-d4 106% 60-140 " <br /> MW-4(5209427-04RE1)Water Sampled:09/19/02 08:06 Received: 09/19/02 09:30 <br /> Methyl tert-butyl ether 17000 250 ug/I 500 2100049 10/03/02 10/03/02 EPA 8260B <br /> Surrogate: 1,2-DCA-d4 82% 60-140 —�- --- <br /> W-6(5209427-05) Water Sampled: 09/19/02 08:01 Received:09/19/02 09:30 <br /> -butyl alcohol 590 500 ug/1 100 2100002 10/01/02 10/01/02 EPA 8260B <br /> Di-isopropyl ether ND 50 <br /> Ethyl tert-butyl ether ND 50 " <br /> Tert-amyl methyl ether 110 50 " <br /> Ethanol ND 5000 " <br /> 1,2-Dichloroethane ND 50 <br /> 1,2-Dibromoethane(EDB) ND 50 <br /> Surrogate: 1,2-DCA-d4 110% 60-140 •' -- <br /> MW-6(S209427-05RE1)Water Sampled: 09/19/02 08:01 Received: 09/19/02 09:30 <br /> Methyl tert-butyl ether 69000 500 ugll 1000 2100049 10/03/02 10/03/02 EPA 82608 <br /> Surrogate: 1,2-DCA-d4 82% 60-140 <br /> cluoia 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 /> a Page 6 of 13 <br />