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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> ��► Analytical FAX(707707)7921865 <br /> 792 0342 <br /> www sequoialsbs Com <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P406416 <br /> 3017 Kilgare Road Suite 100 Project Number WR 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Beakosky 07/14/04 16 40 <br /> DRAFT: Purgeables by EPA Method 624 <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Diluhon Batch Prepared Analyzed Method Note <br /> DRAFT EFF(P406416-01)Water Sampled 06/17/04 09 00 Received 06/17/04 11 40 <br /> Benzene ND 1 0 ug/1 l 4070008 07/01/04 07/01/04 EPA 624 <br /> Bromodichloromethane ND 1 D <br /> Bromofoim ND 10 <br /> Bromomethane ND 10 " ^ <br /> Carbon tetrachlonde ND 10 <br /> Chlorobenzene ND 1 D " <br /> Chloroethane ND 10 " ^ <br /> Chloroform ND 10 <br /> Chloromethane ND 10 " <br /> Dlbromochloromethane ND 10 " ^ <br /> 1,2-Dichlorobenzene ND 10 <br /> 1,3-Dichlorobenzene ND 1 Q <br /> 1,4-Dichlorobenzene ND 10 <br /> 1,1-Dichloroethane ND 10 " <br /> 1,2-Dichloroethane ND 10 <br /> I,1-Dichloroethene ND 10 <br /> cis-1,2-Dichloroethene ND 10 <br /> trans-1,2-Dichloroethene ND 10 " <br /> 1,2-Dichloropropane ND 10 <br /> cis-1,3-Dichloropropene ND 10 <br /> trans-1,3-Dichloropropene ND 10 <br /> Ethylbenzene ND 10 " <br /> Methylene chloride ND 10 " <br /> Methyl tert-butyl ether ND 10 <br /> 1,1,2,2-Tetrachloroethane ND 10 <br /> Tetrachloroethene ND 10 <br /> Toluene ND 10 " <br /> 1,1,2-Tnchloroethane ND 10 <br /> 1,1,1-Tnchloroethane ND 10 <br /> Trichloroethene ND 10 <br /> Tnchlorofluoromethane ND 10 <br /> Vinyl chloride ND 10 " <br /> Xylenes(total) ND 10 " <br /> Surrogate Dibromofluoromethane 112% 84-122 " <br /> Surrogate 12-Dichloroethane-d4 113% 74-135 " <br /> Surrogate Toluene-d8 109% 84-119 <br /> Surrogate 4-Bromofuorobenzene 102% 86-119 <br /> DRAFT REPORT The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 5 of 20 <br />