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Sequoia <br />404 N WigetLane <br />Walnut Creek CA 94598 <br />4 <br />4D_ <br />(9Z5)988 -9G00 <br />Cert -Butyl alcohol <br />FAX (925) 988-9673 <br />Analytical <br />www sequaialabs ca <br />19 -Jul -00 EPA 8260A <br />Gettler Ryan, Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron 49-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 26 -Jul -00 10 48 <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 />INF (W007366-04) Water Sampled 19,Iul-00 10 22 <br />Received <br />194u1-00 14 00 <br />Cert -Butyl alcohol <br />30000 <br />10000 <br />ug/1 100 OG20015 19 -Jul -00 <br />19 -Jul -00 EPA 8260A <br />Methyl tert-butyl ether <br />220000 <br />10000 <br />5000 <br />20 -Jul -00 " <br />Di -Isopropyl ether <br />ND <br />200 <br />100 <br />19 -Jul -00 " <br />Ethyl tent -butyl ether <br />2600 <br />200 <br />" <br />Cert -Amyl methyl ether <br />730 <br />200 <br />" <br />Surrogate Dibromofluoromethane <br />100% <br />50-150 <br />" <br />Surrogate 1,2-Dichloroethane-d4 <br />980% <br />50-150 <br />" <br />EFFLUENT (W007366-05) Air <br />Sampled 19 -Jul -00 12 00 Received 19,1ul-00 14 00 <br />tert-Butyl alcohol <br />ND <br />20 mgim3 Air 1 OG19014 19 -Jul -00 <br />19 -Jul -00 EPA 8260A <br />Methyl tert-butyl ether <br />ND <br />050 <br />" <br />DI -isopropyl ether <br />ND <br />050 <br />" <br />Ethyl tert-butyl ether <br />ND <br />050 <br />" <br />tert-Amyl methyl ether <br />ND <br />050 <br />" 1 <br />Surrogate Dibromofluoromethane <br />980% <br />50-150 <br />" <br />Surrogate 12-Dichloroethane-l4 <br />100% <br />50-150 <br />" <br />INFLUENT (W007366-06) Air <br />Sampled 19 -Jul -00 12 05 Received 19 -Jul -00 14 00 <br />tert-Butvl alcohol <br />170 <br />20 <br />mgw Air 1 OG19014 19 -Jul -00 <br />19 -Jul -00 EPA 8260A <br />Methyl tert-butyl ether <br />990 <br />25 <br />50 <br />20 -Tui -00 " <br />Di -Isopropyl ether <br />ND <br />050 <br />1 <br />19 -Jul -00 " <br />Ethyl tert-butyl ether <br />44 <br />so <br />10 " <br />20 -Jul -00 " <br />tent -Amyl methyl ether <br />16 <br />50 <br />' <br />Surrogate Dibromofluoromethane <br />940% <br />50-150 <br />19Ju1-00 " <br />Surrogate 1 2 Dichloroethane-l4 <br />176% <br />50-150 <br />1 1S-04 <br />Adilk <br />Sequoia Analytical - Walnut Creek The results in dus report apply to the samples analyzed in accordance with the chain <br />custody document This analytical report must be reproduced in its entirety <br />Page 6 of II <br />M.1 <br />