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885 Jarvis Dr <br /> Sequoia Morgan Hill,CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www.sequoialabs.ccm <br /> 'tratus Environmental Inc. Project: ARCO#5469,Stockton,CA MLL0441 <br /> 330 Cameron Park Dr.,Suite 550 Project Number: ARCO#5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 01/07/03 12:15 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-7 MLL0441-07 Water Sampled: 12/11/02 04:45 Received: 12/11/02 12.00 <br /> ter -Butyl alcohol ND 40 ug/l 2 2L24008 12/24/02 12/24/02 EPA 8260B <br /> Methyl tert-butyl ether 98 1.0 ^ <br /> Di-isopropyl ether ND 1.0 <br /> Ethyl tert-butyl ether ND 1.0 <br /> tert-Amyl methyl ether ND 1.0 ^ ^ <br /> 1,2-Dichloroethane ND 1.0 <br /> 1,2-Dibromoethane(EDB) ND 1.0 " ^ <br /> Surrogate:1,2-Dichloroethane-d4 118% 78-129 <br /> MW-8(MLL0441-08)Water Sampled: 12/11/02 05:58 Received: 12/11/02 12:00 <br /> tert-Butyl alcohol ND 10000 ug/l 500 2L24008 12/24/02 12//24/02 EPA 8260B <br /> Methyl tert-butyl ether 24000 250 <br /> Di-isopropyl ether ND 250 <br /> Ethyl tert-butyl ether ND 250 ^ <br /> tert-Amyl methyl ether ND 250 <br /> -Dichloroethane ND 250 <br /> Dibromoethane(EDB) ND 250 <br /> Surrogate: 1,2-Dichloroethane-d4 117% 78-129 " ^ <br /> _ <br /> MW-9(MLL0441-09)Water Sampled: 12/11/02 05.43 Received: 12/11/02 12:00_ <br /> tert-Butyl alcohol ND 20 ugll 1 .-2L20026 12/19/02 12/20/02 EPA 8260B <br /> Methyl tert-butyl ether 0.68 0.50 ^ ^ <br /> Di-isopropyl ether 2.7 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 <br /> tert-Amyl methyl ether ND 0.50 <br /> 1,2-Dichloroethane 21 0.50 <br /> 1,2-Dibromoethane(EDB) ND 0.50 „ <br /> Surrogate:1,2-Dichloroethane-d4 113% 78-129 <br /> oia Analytical-Morgan Hili 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 wet weight hasis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 10 of 20 <br />