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4D (91819 Sinker Avenue Suite 8 958 <br /> Sequoia Sacramento CA 95634 <br /> Analytical FAX <br /> 6)921-9100 <br /> (916)92 1-0100 <br /> www sequoialabs com <br /> SECOR International-Rancho Cordova Project Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/02/02 16 44 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> GP-8(S206351-03)Water Sampled 06/21/02 12 20 Received 06/24/02 15 00,_ <br /> Ethanol ND 4000 ug/l 100 2F30002 06/30/02 07/01/02 EPA 8260B <br /> tert-Butyl alcohol ND 2000 " <br /> Methyl tert-butyl ether 230 50 " <br /> Di-isopropyl ether ND 50 " <br /> Ethyl tert-butyl ether ND 50 " <br /> ter -Amyl methyl ether ND 50 <br /> 1,2-Dtchloroethane ND 50 " <br /> Ethylene dibromide ND 50 " <br /> Benzene 110 50 " <br /> Toluene ND 50 " <br /> Ethylbenzene 740 50 <br /> Total Xylenes 1300 50 " <br /> Gasoline Range Organics(C6-C10) 15000 5000 " <br /> Surrogate 12-Dtchloroethane-d4 111 % 60-140 <br /> P-9 5206351-04)Water Sampled 06/21/02 13 20_Received_ 06/24/02 15 00 <br /> thanol ND 40 ug/1 1 2F30002 06/30/02 07/01/02 EPA 8260B <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tert-butyl.ether 22 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> tert-Amyl methyl ether ND 050 " <br /> 1,2-Dtchloroethane ND 050 <br /> Ethylene dibromide ND 050 " <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene 096 0 50 " <br /> Total Xylenes 12 0 50 <br /> Gasoline Range Organics(C6-C10) ND 50 " <br /> Surrogate 12-Dtchloroethane-d4 111 % 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 This analytical report must be reproduced in its entirety <br /> Page Page 3 of 6 <br />