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/ (� 4041`' W ige t Lane <br /> Walnut Cr <br /> D— <br /> Se uoia eek 44598 <br /> Fes♦ q (925)9)9 88-9600 <br /> D— <br /> " Analytical FAX(925) 9673 <br /> • WWW xOlalablahS C(d71 <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd,Ste #100 ProjectNumber Arco#2133,Stockton Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 14-Aug-02 13 16 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2HO5003-EPA 5030B(MeOH) <br /> Blank(2H05003-BLKl) Prepared&Analyzed 05-Aug-02 <br /> Dichlorodifluoromethane ND 010 mg/kg <br /> Chloromethane ND 020 " <br /> Vinyl chlonde ND 020 " <br /> Bromomethane ND 050 " <br /> Chloroethane ND 020 " <br /> Tnchlorofluoromethane ND 020 " <br /> 1,1 Dichloroethene ND 020 " <br /> Methylene chloride ND 10 " <br /> Methyl tert butyl ether(MTBE) ND 020 " <br /> trans-l,2-Dichloroethene ND 025 " <br /> 1,I-Dichloroethane ND 010 " <br /> 2 2-Dichloropropane ND 020 " <br /> cis-l2-Dichloroethcne ND 020 <br /> Bromochloromethane ND 025 <br /> Chloroform ND 010 <br /> 1,1 1-Tnchloroethane ND 020 " <br /> Carbon tetrachloride ND 1 0 <br /> 1,1-Dichloropropene ND 020 " <br /> Benzene ND 020 " <br /> 1,2-Dichloroethane ND 010 <br /> Trichloroethene ND 025 <br /> 1,2 Dtchloropropane ND 025 <br /> Dibromomethane ND 025 <br /> Bromodichloromethane ND 020 " <br /> cis-1,3-Dichloropropene ND 020 " <br /> Toluene ND 050 " <br /> trans-l,3-Dichloropropene ND 020 <br /> 1,1 2-Tnchloroethane ND 0 25 " <br /> Tetrachloroethene ND 010 " <br /> 1,3-Dtchloropropane ND 020 ` <br /> Dibromochloromethane ND 010 - <br /> 1,2-Dibromoethane ND 020 " <br /> Chlorobenzene ND 010 " <br /> Ethylbenzene ND 010 " <br /> Total Xylenes ND 050 " <br /> 1,1,1,2-Tetrachloroethane ND 020 " <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 15 of 20 <br />