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Sequoia 8$5 Jarvis Drive <br /> '1 Morgan Hill,CA 95037 <br /> Analytical (408)776-9600 <br /> r�� <br /> FAX(408)782-6308 <br /> www.sequoialabs.con <br /> 7 URS Corporation 111 Project: ARCO#5450,Stockton,CA <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#5450,Stockton,CA Reported: <br /> Sacramento CA,95833 Project Manager: Vern Elarth 09/25/02 15:23 <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-2 LI0356-01 Water Sampled:09111/0215:55 Received:0911310216:20 <br /> Ethanol ND 40 ug/l 1 2I18018 09/18/02 09/18/02 EPA 8260B <br /> tert-Butyl alcohol ND 20 <br /> Methyl tert-butyl ether 62 0.50 <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> tert-Amyl methyl ether ND 0.50 <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethylene dibromide ND 0.50 " <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 " <br /> Total Xylenes ND 0.50 " <br /> Gasoline Range Organics(C6-C10) 98 50 " <br /> Surrotrate:1,2-Dichloroethane-d4 111 % 78-129 " <br /> W-3 L10356-02 Water Sampled:09/11/0216:10 Received:09113/0216:20 <br /> Ethanol ND 40 ugll 1 2118018 09/18/02 09/18/02 EPA 8260B <br /> tert-Butyl alcohol ND 20 <br /> Methyl tert-butyl ether 0.77 0.50 <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 <br /> tert-Amyl methyl ether ND 0.50 <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethylene dibrotnide ND 0.50 <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> Total Xylenes ND 0.50 <br /> Gasoline Range Organics(C6-C10) ND 54 <br /> Surrozate:1,2-Dichloroethane-d4 113% 78-129 " <br /> Sequoia 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 6 <br />