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819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> Sequoia (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs corn <br /> SECOR international-Rancho Cordova Project ARCO 4493,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Protect Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager• Rusty Benkosky 01/16/02 13 32 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> W-2(S201093=92)Water Sampled 12/31/0109 Q Received 01/04/02 17 3 <br /> Tert-butyl alcohol ND so ugll 1 2010131 01/11/02 01/11/02 EPA 8260B <br /> Methyl tert-butyl ether 16 050 <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 050 <br /> Ethanol ND 50 " <br /> 1,2-Dichloroethane ND 050 <br /> Ethylene dibromide ND 050 " <br /> Surrogate 12-DCA-d4 996% 60-140 " <br /> Benzene ND 10 <br /> Bromobenzene ND 10 " <br /> Bromochioromethane ND 10 " <br /> Bromodichloromethane ND 10 " <br /> �romoform ND 10 „ <br /> romomethane ND 2 5 " <br /> n-Butylbenzene ND l0 " <br /> sec-Butylbenzene ND 10 <br /> tert-Butylbenzene ND 10 " <br /> Carbon tetrachlonde ND 10 <br /> Chlorobenzene ND 10 <br /> Chloroethane ND 2 5 " <br /> Chloroform ND 10 <br /> Chloromethane ND 2 5 " <br /> 2-Chlomtoluene ND 10 " <br /> 4-Chlorotoluene ND 10 " <br /> Dibromochloromethane ND 10 " <br /> 1,2-Dibromoetime ND 10 " <br /> Dtbromomethane ND 10 <br /> 1,2-Dibromo-3-chloropropane ND 2 5 " <br /> 1,2-Dichlorobenzene ND 10 " <br /> 1,3-Drchlonobenzcne ND 10 <br /> 1,4-Dichlorobenzene ND 10 " <br /> Dichlorodifluoromethane ND 25 " <br /> 1,1-Dichloroethane ND 10 " <br /> 1,2-Dichloroethane ND 10 <br /> 1,1-Dichloroethene ND 10 <br /> cis-1,2-Dichloroethene 18 10 " <br /> �equoia Analytical-Sacramento 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 /> Page Page 6 of 23 <br />