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885 Jarvis Dr <br /> Sequoia Mcrgin Hill,CA 95037 <br /> 4��— <br /> Analytic al (408)776-9600 <br /> FAX(408)782-6308 <br /> wnvw sequoialabs can <br /> os—tr"."7. nvironmental Inc Project ARCO#2186,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 Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 MLL0253-01 Water Sampled 12/03/02 08 15 Received 12/05/02 10 00 <br /> tert-Butyl alcohol ND 2000 ug/l 100 2L17010 12/17/02 12/17/02 EPA 8260B <br /> Methyl tert-butyl ether 3100 50 " <br /> Di-isopropyl ether ND 50 " <br /> Ethyl tert-butyl ether ND 50 " <br /> tert-Amyl methyl ether ND 50 " <br /> 1,2-Dichloroethane 80 50 " <br /> Benzene 1700 50 " <br /> Toluene 950 50 " <br /> Ethylbenzene 1500 50 " <br /> Xylenes(total) 5700 50 " <br /> Gasohne Range Organics(C6-C70) 30000 5000 " <br /> Surrogate 1,1-Dichloroethane-d4 112% 78-129 " <br /> MW-2 LL0253-02 Water Sampled 12/03/02 09 50 Received 12/05/02 10 00 <br /> tert-Butyl alcohol ND 20 ug/1 1 2L15003 12/15/02 12/16/02 EPA 8260B <br /> *ethyl tert-butyl ether 068 050 <br /> .-isopropyl ether ND 050 " <br /> Ethyl Cert-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 0 50 " <br /> 1,2-Dichloroethane ND 0 50 " <br /> Benzene 064 050 " <br /> Toluene 0 54 050 " <br /> Ethylbenzene 0 81 050 " <br /> Xylenes(total) 2 5 0 50 " <br /> Gasoline Range Organics(C6-C10) ND 50 " <br /> Surrogate 1,2-Dichloroethane-d4 107% 78-129 " <br /> Sequoia 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 basis <br /> This analytical report must be reproduced in its entirety <br /> Page 3 of 11 <br />