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Sinker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> a— ) <br /> Analytical FAX(916)921-4100 <br /> (916)921 0 10 <br /> www segnoialabs cam <br /> SECOR Intemational-Rancho Cordova Project Tosco 1205,Lathrop,CA 5211698 <br /> 3017 Mgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 02/12/03 12 10 <br /> BTEX by EPA Method 8260B <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-10(S21169MI)Water Sampled 11/21/02 06 25 Received 11/22L02 09 15 <br /> Ethanol ND 50 ugll 1 2120101 12/05/02 12/05/02 EPA 8260E <br /> Tert-butyl alcohol ND 5 0 1. n It " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Tert-amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Toluene 054 050 <br /> Xylenes(total) 11 050 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate Toluene-d8 106% 60-140 " <br /> Wl <br /> urrogate 4-BFB 123% 60-140 <br /> urrogate 12-DCA-d4 III % 60-140 " <br /> MW-11 621169&021-Water Sampled 11121102 06.30 Received 11/22/02 09 15 <br /> Ethanol ND 50 ug/l 1 2120101 12/05/02 12/05/02 EPA 8260E <br /> Tert-butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 2 0 " <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 /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 050 " <br /> Ethylbenzene ND 050 <br /> Toluene 11 050 <br /> Xylenes(total) 16 050 <br /> Gasoline(C6-CIO) ND 50 " <br /> Surrogate Toluene-d8 104% 60-140 " <br /> Surrogate 4-BFB 117% 60-140 " <br /> Surrogate 12-DCA-d4 108% 60-140 <br /> ,Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 3 of 10 <br />