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a— ) 885 ,CA 5G37 <br /> Drive <br /> Sequoia Morgan Hil1CA45037 <br /> Analytical (a08)7700 <br /> J "; FAX(408)782-632-6308 <br /> www sequoialabs con <br /> 4DURS Corporation[ll Project ARCO#4493,Stockton,Ca <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number ARCO#4493,Stockton,CA Reported <br /> Sacramento CA,95833 Project Manager Vern Etarth 11/11/02 07 04 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Morgan Hall <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Ltmit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2KO8011-EPA 5035 <br /> Blank(2K08011-BLK1) Pre aced&Analyzed 11/08/02 <br /> Benzene ND 050 ug/kg <br /> Ethanol ND 200 " <br /> Bromobenzene ND 0 50 " <br /> tert-Butyl alcohol ND 100 0-09 <br /> Bromochloromethane ND 0 50 " <br /> Methyl tert-butyl ether ND 5 0 " <br /> Bromodichloromethane ND 0 50 " <br /> Dt-isopropyl ether ND 5 0 " <br /> Bromoform ND 050 " <br /> Ethyl tert-butyl ether ND 5 0 " <br /> Bromomethane ND 2 0 " <br /> tert-Amyl methyl ether ND 5 0 0-09 <br /> 1,2-Dichloroethane ND 5 0 " <br /> n-Butylbenzene ND 0 50 <br /> 1,2-Dibromocthane(EDB) ND 5 0 " <br /> sec-Butylbenzene ND 0 50 " <br /> Benzene ND 50 " <br /> tent-Butylbenzene ND 0 50 " <br /> Carbon tetrachloride ND 0 50 " <br /> Toluene ND 5 0 " <br /> Chlorobenzene ND 0 50 " <br /> Ethylbenzene ND 5 0 " <br /> Chloroethane ND 2 0 " <br /> Xylenes(total) ND 50 " <br /> Chloroform ND 0 50 " <br /> Chloromethane ND 5 0 " <br /> 2-Chlorotoluene ND 0 50 " <br /> 4-Chlorotoluene ND 0 50 " <br /> Dibromochloromethane ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> Dibromomethane ND 0 50 " <br /> 1,2-Dibromo-3-chloropropane ND 2 0 " <br /> 1,2-Dichlorobenzene ND 0 50 " <br /> 1,3-Dichlorobenzene ND 0 50 " <br /> 1,4-Dichlorobenzene ND 0 50 " <br /> Dichlorodifluoromethane ND 0 50 " <br /> Sequoia Analytical-Morgan Htll 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 /> 8of11 <br />