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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (&I (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> WSECOR 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 P-Jed age' Rusty Bcnkosky 04/10/02 16 29 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilutzon Batch Prepared Analyzed Method Notes <br /> A4W 4(5203267-01)Water Samulgd.03/13/02 12.10 Received,03/15/02 12.45 <br /> 1,3-Dichloropropane ND 050 ug/1 1 2030252 03/20/02 03/20/02 EPA 8260B <br /> 2,2-Dichloropropane ND 050 <br /> ],I-Dichloropropene ND 050 " <br /> Ethylbenzene 35 050 ^ <br /> Hexachlorobutadiene ND 10 <br /> Isopropylbenzene 93 050 " <br /> p-lsopropyltoluene ND 050 " <br /> Methylene chlonde ND 10 <br /> Naphthalene 69 10 <br /> n-Propylbenzene 14 050 " <br /> Styrene ND 050 " <br /> 1,1,1,2-Tetrachloroethane ND 050 ^ ^ <br /> 1,1,2,2-Tetrachloroethane ND 10 ^ <br /> Tetrachloroethene ND 0 50 <br /> 0oluene 0 96 050 11 " <br /> ,2,3-Tnchlorobenzene ND 050 " <br /> 1,2,4-Tichlorobenzene ND 050 " <br /> 1,1,1-Tnehloroethane ND 0 50 " <br /> 1,1,2-Trichloroethane 097 0 50 <br /> Tnchloroethene ND 0 50 <br /> Tnchlomfluoromethane ND 0 50 " <br /> 1,2,3-Tnchloropropane ND 10 " <br /> 1,2,4-Trimethylbenzene 10 0 50 ^ ^ <br /> 1,3,5-Trimethylbenzene 0 65 0 50 " <br /> Vinyl chloride ND 0 50 <br /> Total Xylenes 47 0 50 11 H " <br /> Surrogate Dibromofluoromethane 852% 70-130 " ~ <br /> Surrogate 12-DCA-d4 808% 70-130 ~ <br /> Surrogate Toluene-d8 868% 70-130 " <br /> Surrogate 4-BFB 824% 70-130 ~ <br /> �equoia Analytical-Sacramento The results in this report apply to the samples analyzed m accordance with the chain <br /> ojcustody document This analytical report must be reproduced in its entirety <br /> Page Page 11 of 27 <br />