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QSequoia <br />Analytical <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoWabs com <br />'Mttler Rvan ine, -Dublin Project Cheaper <br />6747 Sierra Court Suite J Project Number Chevron119-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 12 -Apr -00 11 36 <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />knalyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br />EFF (16 47) (W004172-04) Air <br />Sampled 06 -Apr -00 16 47 Received 07 -Apr -00 17 45 <br />tert-Butyl alcohol <br />ND <br />20 mgrm' air 1 OD 10012 09 Apr 00 <br />09 Apr 00 EPA 8260A <br />Methyl tert-butyl ether <br />ND <br />0 50 <br />Di-isopropvl ether <br />ND <br />050 <br />Ethyl tert-butyl ether <br />ND <br />050 <br />tert-Amvl methvl ether <br />ND <br />050 <br />Surrogate Drbromci luoromethane <br />104% 50-150 <br />" <br />Surrogate I 2-Dichloroethane-l4 <br />106% 50-150 <br />EX -1 (W004172-05) Water Sampled 06 -Apr -00 00 00 <br />Received 07 -Apr -00 17 45 <br />Cert -Butyl alcohol <br />37000 <br />10000 ug/l 100 OD09001 09 -Apr 00 <br />09 Apr -00 EPA 8260A <br />Methyl tent -butyl ether <br />500000 <br />10000 5000 <br />10 Apr -00 ~ <br />Di-tsopropyl ether <br />ND <br />200 100 <br />09 -Apr -00 ~ <br />Ethyl tent -butyl ether <br />11000 <br />200 <br />tent -Amyl methyl ether <br />4300 <br />200 <br />" <br />Dibromofluoromethane <br />1 2-Dichloroethane-t4 <br />100% 50-150 <br />104% 50-150 <br />iota Analytical - Walnut Creek The results in this report apply to the vamples analyzed in accordance with the chane of <br />custody document This analytical repose must be reproduced in its entirely <br />Page 6 of 12 <br />9 <br />