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Sequoia 0 <br />� Analytical _ <br />• 404 N. Wiget Lane <br />Walnut Creek, CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www.sequoialabs.com <br />Secor - Rancho Cordova Project: Arco <br />3017 Kilgore Rd., Ste. #100 Project Number: Arco # 2133, Stockton Reported: <br />Rancho Cordova CA., 95670 Project Manager: Rusty Benkosky 14 -Aug -02 13:16 <br />Volatile Organic Compounds by LPA Method 82buB <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />walyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br />WT -1 (W208041-01) Soil Sampled: 02 -Aug -02 00:00 Received: 02 -Aug -02 14:50 <br />Dichlorodifluoromethane <br />ND <br />0.10 mg/kg 100 2HO5003 05 -Aug -02 05 -Aug -02 EPA 8260B <br />Chloromethane <br />ND <br />0.20 <br />Vinyl chloride <br />ND <br />0.20 <br />Bromomethane <br />ND <br />0.50 <br />Chloroethane <br />ND <br />0.20 <br />Trichlorofluoromethane <br />ND <br />0.20 <br />1,1-Dichloroethene <br />ND <br />0.20 <br />Methylene chloride <br />ND <br />1.0 <br />Methyl tert-butyl ether (MTBE) <br />ND <br />0.20 <br />trans-1,2-Dichloroethene <br />ND <br />0.25 <br />1,1-Dichloroethane <br />ND <br />0.10 <br />2,2-Dichloropropane <br />ND <br />0.20 <br />cis-1,2-Dichloroethene <br />ND <br />0.20 <br />Bromochloromethane <br />ND <br />0.25 <br />Chloroform <br />ND <br />0.10 <br />1,1,1 -Trichloroethane <br />ND <br />0.20 " <br />Carbon tetrachloride <br />ND <br />1.0 <br />1,1-Dichloropropene <br />ND <br />0.20 <br />Benzene <br />ND <br />0.20 <br />1,2-Dichloroethane <br />ND <br />0.10 <br />Trichloroethene <br />ND <br />0.25 <br />1,2-Dichloropropane <br />ND <br />0.25 <br />Dibromomethane <br />ND <br />0.25 <br />Bromodichloromethane <br />ND <br />0.20 " <br />cis-1,3-Dichloropropene <br />ND <br />0.20 " <br />Toluene <br />ND <br />0.50 <br />trans-1,3-Dichloropropene <br />ND <br />0.20 <br />1,1,2 -Trichloroethane <br />ND <br />0.25 <br />Tetrachloroethene <br />ND <br />0.10 <br />1,3-Dichloropropane <br />ND <br />0.20 <br />Dibromochloromethane <br />ND <br />0.10 <br />1,2-Dibromoethane <br />ND <br />0.20 <br />Chlorobenzene <br />ND <br />0.10 <br />Ethylbenzene <br />ND <br />0.10 <br />Total Xylenes <br />ND <br />0.50 <br />1,1,1,2 -Tetrachloroethane <br />ND <br />0.20 <br />Styrene <br />ND <br />0.25 <br />Bromoform <br />ND <br />0.10 <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document. This analytical report must be reproduced in its entirety. <br />Page 5 of 20 <br />