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404 N Wiget Lane <br />Sequoia Walnut Creek CA 94598 <br />(925) 98g-9600 <br />FAX (925) 988-9673 <br />IQFAnalytical wwwseguotatatis com <br />ttler Ryan Inc - Dublin Project Chevron <br />6747 Sierra Court Suite 7 Project Number Chevron SS#9-5775 Reported <br />Dublin CA 94568 Pro3ett Manager Scott Polston 25-Apr-00 17 37 <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note: <br />INF (W004472-01) Air Sampled 19 -Apr -0015 20 Received 20 -Apr -00 15 20 <br />tert-Butyl alcohol ND 5000 mg/ml Air 250 OD24015 21 -Apr -00 21 -Apr -00 EPA 8260A <br />Methyl tent -butyl ether 15000 130 " <br />Di -isopropyl ether ND 130 <br />Ethyl tert-butyl ether 780 130 " <br />text -Amyl methyl ether ND 130 " <br />Surrogate Dibromofluoromethane <br />100% <br />50-150 " <br />Surrogate 1,2-Dichloroethane-l4 <br />940% <br />50-150 " <br />Tank (WO04472-03) Water Sampled <br />19 -Apr -0015 00 <br />Received <br />20 -Apr -00 15 20 <br />tert-Butyl alcohol <br />ND <br />500000 <br />ug/l 5000 OD21021 21 -Apr -00 21 -Apr -00 EPA 8260A <br />Methyl tent -butyl ether <br />240000 <br />10000 <br />" <br />Di -isopropyl ether <br />ND <br />10000 <br />" <br />Ethyl tert-butyl ether <br />ND <br />10000 <br />" <br />tert-Amyl methyl ether <br />ND <br />10000 <br />" <br />Surrogate Dibromofluoromethane <br />100% <br />50-150 " <br />Ourrogate 1,2-Dichloroethane-l4 <br />880% <br />50-150 " <br />EX -1 (W004472-04) Water Sampled <br />19 -Apr -00 15 30 <br />Received 20 -Apr -00 15 20 <br />tert-Butyl alcohol <br />ND <br />250000 <br />ug/l 2500 OD21021 20 -Apr -00 21 -Apr -00 EPA 8260A <br />Methyl tert-butyl ether <br />490000 <br />5000 <br />" <br />Dt-isopropyl ether <br />ND <br />5000 <br />" <br />Ethyl tert-butyl ether <br />15000 <br />5000 <br />" <br />tert-Amyl methyl ether <br />6300 <br />5000 <br />Surrogate Dibromofluoromethane <br />980% <br />50-150 " <br />Surrogate l 2-Dichloroethane-d4 <br />880% <br />50450 " <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document This analytical report must be reproduced in its entirety <br />Page 5 of 10 <br />