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819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> SECOR International-Rancho Cordova Project ARCO 4493,Stockton,CA <br /> 30)7 Kilgore Road,Suite 100 Project Number 4493,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/10/02 16 29 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-2(52032§7-02)_Water._SaMpled.03/13/02 12.30 Received 03/15/02 12.45 �A-01a <br /> 1,2-Dichloropropane ND 10 ugll 2 2030252 03/20/02 03/20/02 EPA 8260E <br /> 1,3-Dichloropropane ND 10 <br /> 2,2-Dichloropropane ND 10 " <br /> 1,1-Dichloropropene ND 10 " <br /> Ethylbenzene ND 10 " <br /> Hexachlorobutadiene ND 20 " ^ <br /> Isopropylbenzene ND 10 <br /> p-lsopropyltoluene ND 10 " <br /> Methylene chloride ND 2 0 " <br /> Methyl tert-butyl ether 51 10 <br /> Naphthalene ND 2 0 ^ <br /> n-Propylbenzene ND 10 " <br /> Styrene ND 10 " <br /> 1,1,1,2-Tetrachloroethane ND 10 " <br /> *1,2,2-Tetrachloroethane ND 2 0 <br /> etrachloroethene 2 4 10 " <br /> Toluene ND 10 " <br /> 1,2,3-Tnchlorobenzenc ND 10 <br /> 1,2,4-Tnchlorobenzene ND 10 " <br /> 1,1,1-Trichloroethane ND 10 <br /> 1,1,2-Tnchloroethane ND 10 ^ " <br /> Trichloroethene 110 10 " <br /> Tnchlorofluoromethane ND 10 <br /> 1,2,3-Tnchloropropane ND 20 " ^ <br /> 1,2,4-Tnmethylbenzene ND 10 <br /> 1,3,5-Tnmethylbenzene ND 10 <br /> Vinyl chloride 21 10 <br /> Total Xylenes ND 1 0 <br /> Surrogate Dtbromofluoromethane 788516 70430 " <br /> Surrogate 1 2-DCA-d4 74 0% 70-130 " <br /> Surrogate Toluene-d8 860% 70-130 " <br /> Surrogate 4-BFB 856% 70-130 <br /> quota Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This anatyucal report must be reproduced in its entirety <br /> Page Page 7 of 27 <br />