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h Sequoia <br />1-5)— Analytical <br />404 N Wlget Lane <br />Walnut Geek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequolaWn com <br />Gettler Ryan, Inc - Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 24 -Jul -00 11 33 <br />Volatile Organic Compounds by EPA Method 8z6UA <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br />MP -2 (W007143-04) Water Sampled <br />10,Jul-00 1128 <br />Received <br />10 -Jul -00 13 20 <br />Ethanol <br />ND <br />S00 <br />ugll 1 OG10007 10 -Jul -00 10 -Jul -00 EPA 8260A <br />tert-Butvl alcohol <br />ND <br />100 <br />„ <br />" <br />Methyl ter( -butyl ether <br />ND <br />20 <br />Di -isopropyl ether <br />ND <br />20 <br />" <br />Ethyl tert-butyl ether <br />ND <br />20 <br />" <br />tert-Amvl methyl ether <br />ND <br />20 <br />1,2-Dichloroethane <br />ND <br />20 <br />" <br />Ethylene dibromide <br />ND <br />20 <br />Surrogate Drbromof luoromethane <br />960% <br />50-150 <br />Surrogate 1,2-Dichloroethane-d4 <br />840% <br />50-150 " <br />MP -1 (WO07143-05) Water Sampled <br />10 -Jul -00 1132 <br />Received <br />10 -Jul -00 13 20 <br />Ethanol <br />ND <br />500 <br />ug✓f 1 OGI0007 10 -Jul -00 10 -Jul -00 EPA 8260A <br />tert-Butyl alcohol <br />ND <br />100 <br />" <br />thvl tert-butyl ether <br />*isopropyl <br />ND <br />20 <br />ether <br />ND <br />20 <br />Ethyl tert-butyl ether <br />ND <br />20 <br />" <br />tertAmvl methyl ether <br />ND <br />20 <br />1,2-Dichloroethane <br />ND <br />20 <br />Ethylene dibromide <br />ND <br />20 <br />Surrogate Dibromofluoromethane <br />980% <br />50-150 <br />Surrogate 1,2-Dichloroethane-d4 <br />900% <br />50-150 <br />Influent (W007143-06) Water Sampled 10 -Jul -001136 Received 10 -Jul -001320 <br />Ethanol <br />ND <br />500 <br />ug/l 1 OG10007 10 -Jul -00 10 -Jul -00 EPA 8260A <br />tert-Butyl alcohol <br />64000 <br />50000 <br />500 " <br />Methyl tent -butyl ether <br />260000 <br />5000 <br />2500 " <br />Di -isopropyl ether <br />ND <br />20 <br />1 <br />Ethyl tert-butyl ether <br />6900 <br />1000 <br />500 <br />tert-Amyl methyl ether <br />2500 <br />1000 <br />" <br />1,2-Dichloroethane <br />ND <br />20 <br />1 " <br />Ethylene dibromide <br />ND <br />20 <br />Surrogate Dibromofluoromethane <br />940% <br />50-150 <br />Surrogate 12-Dichloroethane-l4 <br />0520% <br />50-150 S-04 <br />&,quota Analytical - Walnut Creek <br />The results in fits 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 6 of 15 <br />