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• • 819 Striker Avenue Suite 8 <br /> Sacramento )9 95834 <br /> Sequoia q (916)921-9600 <br /> r Analytical wwscqFAX 6ialabs 100 <br /> www sequolalabs corn <br /> SECOR International-Rancho Cordova Project Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 06/14/02 11 28 <br /> BTEX by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> GP-1 (S206079-11)Water Sampled 06_/05102 10 25 Received 06/06/02 17 35 <br /> Ethanol ND 1000 ug/l 20 2060151 06/13/02 06/14/02 EPA 8260E <br /> Tert-butyl alcohol ND 100 " <br /> Methyl tert-butyl ether ND 10 " <br /> Di-isopropyl ether ND 10 " <br /> Ethyl ter-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 44 10 " <br /> Ethylbenzene 830 10 " <br /> Toluene 260 10 " <br /> Xylenes(total) 2500 10 " <br /> Gasoline(C6-C10) 17000 1000 " <br /> Surrogate Toluene-d8 100% 60-140 " <br /> Surrogate 4-BFB 117% 60-140 " <br /> Surrogate 12-DCA-d4 105010 60-140 " <br /> aP-2 5206079-12 Water Sampled 06/05/02 11 30 Received 06/06/02 17 35 <br /> Ethanol ND 2500 ug/1 50 2060151 06/13/02 06/14/02 EPA 8260B <br /> Tert-butyl alcohol ND 250 <br /> Methyl tert-butyl ether ND 25 " <br /> Di-isopropyl ether ND 25 <br /> Ethyl tert-butyl ether ND 25 " <br /> Tert-amyl methyl ether ND 25 " <br /> 1,2-Dichloroethane ND 25 " <br /> 1,2-Dibromoethane(EDB) ND 25 " <br /> Benzene 170 25 " <br /> Ethylbenzene 1800 25 " <br /> Toluene ND 25 " <br /> Xylenes(total) 360 25 " <br /> Gasoline(C6-C10) 16000 2500 " <br /> Surrogate Toluene-d8 103% 60-140 " <br /> Surrogate 4-BFB 121 % 60-140 " <br /> Surrogate 1 2-DCA-d4 102% 60-140 " <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> 0 custody document This analytical report must be reproduced in its entirety <br /> Page Page 5 of 12 <br />