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Sequoia 885 Jarvis Drive <br /> 4DMorgan Hill,CA 95037 <br /> Y <br /> �r Anal tical (408)776-9600 <br /> FAX(408)782-6308 <br /> www sequoialabs con <br /> tratus EnVironmental Inc Project ARCO#2186,Stockton,CA <br /> 30 Cameron Park Dr,Suite Project Number ARCO#2186,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 10/02/02 17 52 <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 10467-01 Water Sampled 09/12/02 09 01 Received 09/16/02 20 00 <br /> Ethanol ND r 4000 ug/1 100 2125038 09/25/02 09/26/02 EPA 8260B <br /> tert-Butyl alcohol ND — 500 <br /> Methyl tert-butyl ether 3100 50 <br /> Di-isopropyl ether ND 50 <br /> Ethyl tert-butyl ether ND 50 <br /> tent-Amyl methyl ether ND 50 " <br /> 1,2-Dichloroethane S5 54, „ <br /> Ethylene dibromide ND 50' <br /> Benzene 2900 -- 59 <br /> Toluene 4100 f 50 " <br /> Ethylbenzene 3100/— 50 " <br /> Total Xylenes 14000 -` 50 " <br /> Gasoline Range Organics(C6-C10) 64000,-' 5000 <br /> Surrogate 12-Dichloroethane-d4 103% 78-129 <br /> A&F-2 10467-02 Water Sampled_ 09/12/02 07 13 Received 09/16/02 20 00 <br /> anol ND 40 ug/l 1 2125038 09/25/02 09/26/02 EPA 8260B <br /> tert-Butyl alcohol ND 50 + <br /> Methyl tert-butyl ether ND 050 <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 <br /> { <br /> tert-Amyl methyl ether ND 050 <br /> 1,2-Dichloroethane ND 050 <br /> Ethylene dibromide ND 050 <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Total Xylenes ND 050 <br /> Gasoline Range Organics(C6-C10) ND 50 <br /> Surrogate 12-Dichloroethane-d4 100% 78-129 <br /> �oia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> 2 of 10 <br />