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819 Stnket Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> AM �&' www sequoialabs cam <br /> SECOR International-Rancho Cordova Project ARCO 4493,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Prom M-9- Rusty Benkosky 04/10/02 16 29 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2030283-EPA 5030B[P/Tl <br /> Blank(2030283-BLK1 P _ Analyzed _ <br /> � _ repared 03/22/02 Anal ed 03/23102_...-,_.._,__,_....,,....,__„____, <br /> Benzene ND 0 50 ug/I <br /> Bromobenzene ND 0 50 ” <br /> Tert-butyl alcohol ND 50 " <br /> Bromochloromethane ND 0 50 " <br /> Methyl text-butyl ether ND 0 50 " <br /> Bromodichloromethane ND 0 50 " <br /> Di-isopropyl ether ND 050 " <br /> Bromoform ND 0 50 " <br /> Ethyl cert-butyl ether ND 0 50 " <br /> Bromomethane ND 1 0 " <br /> Tert-amyl methyl ether ND 0 50 " <br /> Ethanol ND 500 " <br /> Butylbenzene ND 0 50 " <br /> -Dichloroethane ND 0 50 " <br /> sec-Butylbenzene ND 0 50 " <br /> Ethylene dibromide ND 0 50 " <br /> tert-Butylbenzene ND 0 50 " <br /> Carbon tetrachloride ND 0 50 " <br /> Chlorobenzene ND 0 50 " <br /> Chloroethane ND 0 50 " <br /> Chloroform ND 0 50 " <br /> Chloromethane ND 0 50 " <br /> 2-Chlorotoluene ND 0 50 " <br /> 4-Chlorotoluene ND 0 50 " <br /> Dibromochloromethane ND 0 50 " <br /> 1,2-Dibromoethane ND 0 50 " <br /> Dibromomethane ND 0 50 " <br /> 1,2-Dibromo-3-chloropropane ND 10 " <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 /> I,1-Dichloroethane ND 0 50 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,1-Dichloroethene ND 0 50 " <br /> cis-1,2-Dtchloroethene ND 0 50 " <br /> uoia 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 24 of 27 <br />