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�r 819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 4D <br /> 1W Analytical (916)921-9600 <br /> FAX(916)921-0100 <br /> www sequolalabs com <br /> SECOR International-Rancho Cordova Project Tosco 1245,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 06/14/02 1128 <br /> BTEX by EPA Method 8260B <br /> Sequoia Analytical- Sacramento <br /> Repotting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> GP-3 S206079-13 Water Sampled 06/05/02 12 20 Received 06/06/02 17 35 <br /> Ethanol ND 1000 ug/l 20 2060151 06/13/02 06/14/02 EPA 8260B <br /> Tert-butyl alcohol ND 100 <br /> Methyl tert-butyl ether ND 10 " <br /> Di-isopropyl ether ND 10 <br /> Ethyl tert-butyl ether ND 10 " <br /> Tert-amyl methyl ether ND 10 " <br /> 1,2-Dichloroethane ND 10 <br /> 1,2-Dibromoethane(EDB) ND 10 <br /> Benzene ND 16 " <br /> Ethylbenzene 310 10 " <br /> Toluene ND 10 <br /> Xylenes(total) 140 10 <br /> Gasoline(C6-CIO) 4100 1000 <br /> Surrogate Toluene-d8 103% 60-140 " <br /> Surrogate 4-BFB 124% 60-140 " <br /> KP4 <br /> rrogate 1 2-DCA-d4 104% 60-140 <br /> 5206079-14 Water Sampled 06/05/02 13 35 Received 06/06/02 17 35 <br /> Ethanol ND 50 ug/l 1 2060151 06/13/02 06/14/02 EPA 8260B <br /> Tert-butyl alcohol ND 50 " <br /> Methyl tert-butyl ether ND 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 /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 050 <br /> Ethylbenzene ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline(C6-C10) ND 50 <br /> Surrogate Toluene-d8 102% 60-140 " <br /> Surrogate 4-BFB 127% 60-140 " <br /> Surrogate 12-DCA-d4 110% 60-140 " <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed In accordance with the chain of <br /> custody document This analytical report must he reproduced in its entirety <br /> Page Page 6 of 12 <br />