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885 Iarvts 1}r <br /> Sequoia Mcrgm Hill,CA 95037 <br /> Analytical FAX(40840$)776-9600 <br /> 782-6308 <br /> www sequoialabs can <br /> Stratus Environmental Inc Project ARCO 92186,Stockton,CA MLL0253 <br /> 3330 Cameron Park Dr,Suite 550 Project Number ARCO#2186,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 Litrut Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-3(MLL0253-031 Water ._Sampled 12/03/02 07 18 Received 12/05/02 10 00 <br /> tert-Butyl alcohol ND 20 ug/1 1 21,35003 12/15/02 12/16/02 EPA 8260B <br /> Methyl tert-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 ND 050 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C6-C10) ND 50 " <br /> Surrogate 1,2-Drchloroethane-d4 105% 78-129 " <br /> MW4 MLL0253-04 Water Sampled 12/03/02 08 15 Received 12/05/02 10 00 <br /> tert-Butyl alcohol ND 20000 ue 1000 21-17010 12/17/02 12/17/02 EPA 8260E <br /> ethyl tent-butyl ether 6600 500 " <br /> isopropyl ether ND 500 " <br /> Ethyl tert-butyl ether ND 500 " <br /> tert-Amyl methyl ether ND 500 " <br /> 1,2-Dichloroetbane ND 500 " <br /> Benzene ND 500 " <br /> Toluene ND 500 " <br /> Ethylbenzene ND 500 " <br /> Xylenes(total) ND 500 " <br /> Gasoline Range Organics(C6-C10) ND 50000 " <br /> Surrogate 12-Drchloroethane-d4 114% 78-129 " <br /> 46quoia Analytical-Morgan Hill 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 bases <br /> This analytical report must be reproduced in its entirety <br /> Page 4 of I I <br />