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404 N Wlget Lane <br /> Sequoia Walnut Creek.925)988-9600 <br /> FAX(925)988-9673 <br /> tDAnalytical www sequoialabs torn <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-9940 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 10-Jan-01 08 10 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1(W012402-02)Water Sampled 14-Dec-0019 37 Received 15-Dec-00 16 45 A-03 <br /> Ethanol ND 500 ugfl l OL22010 04-Jan-01 04-San-01 EPA 8260B <br /> tert-Butyl alcohol ND 50 " <br /> Methyl tert-butyl ether 140 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 « « « <br /> tent-Amyl methyl ether 81 20 " <br /> Surrogate Drbromofluoromethane 900% 50-150 " <br /> Surrogate 1,2 Dichloroethaned4 720% 50-150 " <br /> MW-2(W012402-03)Water Sampled 14-Dec-00 18 49 Received 15-Dec-00 16 45 <br /> Ethanol 2400 500 ug/l 1 OL22010 22-Dec-00 22-Dec-00 EPA 8260B <br /> tert-Butyl alcohol ND 50 " <br /> Methyl tent-butyl ether 28 20 " <br /> Di-isopropyl ether ND 20 <br /> yl tent-butyl ether ND 20 <br /> -Amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 960% 50-150 " <br /> Surrogate 1,2 Dichloroethaned4 900% 50-150 <br /> MW-3(W012402-04)Water Sampled 14-Dec-00 18 06 Received 15-Dec-00 16 45 <br /> Ethanol ND 500 ug/I 1 OL22010 22-Dec-00 22-Dec-00 EPA 8260B <br /> tert-Butyl alcohol ND 50 <br /> Methyl tent-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 ^ « « « <br /> Surrogate Dibromofluoromed=e 960% 50-150 " <br /> Surrogate 1,2-Drchloroethaned4 840% 50-150 " <br /> 110Ia Analytical-Walnut Creek The results in thus report apply to the samples analysed in accordance with the chain of <br /> custody document This ana4ecol report must be reproduced in its enarety <br /> page 2 of 13 <br />