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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)92I-0100 <br /> Am (& www sequotalabs com <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 P-ject Mersa- 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-615203267 M Water Sampled 03/13/02 14.30 Received,03/1510212.45 <br /> Surrogate Toluene-d8 816% 70-130 2030252 03120102 03120102 EPA 8260B <br /> Surrogate 4-BFB 824% 70-130 " <br /> MW-7(S203267-0?)Water Sampled 03/13/02 13 10 Received 03/15/02 12 45 <br /> Tert-butyl alcohol ND 5 0 ug/1 1 2030252 03/20/02 03/20/02 EPA 8260B <br /> Methyl tert-butyl ether 18 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Tert-amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethylene dibromide ND 050 " <br /> Surrogate 12-DCA-d4 768% 60-140 " <br /> Benzene 15 050 <br /> Brontobenzene ND 050 " <br /> � <br /> romoehloromethane ND 050 ;; " <br /> romodrehloromethane ND 050 <br /> Bromoforin ND 050 " <br /> Bromomethane ND 10 <br /> n-Butylbenzene 10 050 " <br /> sec-Butylbenzene 14 050 <br /> tert-Butylbenzene 12 050 " <br /> Carbon tetrachloride ND 050 ^ " <br /> Chlorobenzene ND 050 11n 11 " " <br /> Chloroethane ND 050 ^ " <br /> Chloroform ND 050 <br /> Chloromethane ND 050 " <br /> 2-Chlorotoluene ND 050 <br /> 4-Chlorotoluene ND 050 <br /> Dibromochloromethane ND 050 ^ <br /> 1,2-13tbromoethane ND 050 " ^ <br /> Dibromomedme ND 050 ^ <br /> 1,2-Dibromo-3-chloropropane ND 10 " <br /> 1,2-Dichlorobenzene ND 050 " <br /> 1,3-Dichlorobenzene ND 050 <br /> 1,4-Dichlorobenzene ND 050 <br /> Dichlorodifluoromethane ND 050 " <br /> 1,I-Dichloroethane ND 050 <br /> 1,2-Dichlotoethane ND 050 <br /> nota 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 16 of 27 <br />