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895 Jarvis <br /> Sequoia Mogan Hill,CA 4503737 <br /> a— ) <br /> (408)776-9600 <br /> Analytical FAX(408)782 6308 <br /> www sequoialabs cum <br /> Stratus Environmental Inc Project ARCO 92186,Stockton,CA MLL0253 <br /> 3330 Cameron Park Dr,Suite 550 Project Number ARCO 92186,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 12/20/02 09 05 <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 /> VW-213 MLL0253-09 Water Sampled 12/03/02 07 08 Received 12/05/02 10 00 <br /> tert-Butyl alcohol ND 200 ugfl 10 2L17010 12/17/02 12/17/02 EPA 8260B <br /> Methyl tert-butyl ether 98 50 " <br /> Di-isopropyl ether ND 5 0 <br /> Ethyl tert-butyl ether ND 5 0 " <br /> tert-Amyl methyl ether ND 5 0 " <br /> 1,2-Dichloroethane ND 50 " <br /> Benzene ND 5 0 " ^ <br /> Toluene ND 5 0 " <br /> Ethylbenzene ND 5 D ^ <br /> Xylenes(total) ND 5 0 " <br /> Gasoline Range Organics(C6-C10) ND 500 <br /> Surrogate 1,2-Dichloroethane-d4 110% 78-129 <br /> VW-313 LL0253-10 Water Sampled 121031020837 Received 12/051021000 <br /> tert-Butyl alcohol ND 200 ugll 10 2L17010 12/17/02 12/17/02 EPA 8260B <br /> ethyl tert-butyl ether 69 50 <br /> i-isopropyl ether ND 5 0 " <br /> Ethyl tert-butyl ether ND 50 <br /> tert-Amyl methyl ether ND 5 0 " <br /> 1,2-Dichloroethane 61 50 " <br /> Benzene ND 5 0 " <br /> Toluene ND 50 " <br /> Ethylbenzene ND 5 0 " <br /> Xylenes(total) ND 50 " <br /> Gasoline Range Organics(C6-Cl0) ND 500 " <br /> Surrogate 1,2-Dichloroethane-d4 108% 78-129 <br /> Sequoia Analytical -Morgan Hill The results rn this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entrrety <br /> Page 7 of 11 <br />