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Sequoia <br />� Analytical <br />Gettler Ryan Inc -Dublin Project Chevron <br />6747 Sterna Court Suite j Project Number Chevron # 9-5775 <br />Dublin CA 94568 Project Manager Scott Polston <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creep <br />404 N Wlget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialatis corn <br />Reported <br />09 -May -00 1121 <br />Reporting <br />tnalvte Result Limit Units Dilution Batch Prepared Analvzed Method Note <br />INF 2 (15 20) (W005160-04) Air Sampled 04 -May -00 15 20 Rcwved 05 -May -00 14 40 "-` -t <br />tent -Butyl alcohol <br />ND <br />1000 <br />mg/ml Air 50 OE08023 08 May 00 08 Nfav 00 EPA 8260A <br />Methyl tent -butyl ether <br />4500 <br />130 <br />250 <br />D1 -isopropyl ether <br />ND <br />25 <br />50 " <br />Ethyl tert-butyl ether <br />290 <br />25 <br />" <br />tert-Amyl methyl ether <br />88 <br />25 <br />" <br />Surrogate Dibromofluoromethane <br />100% <br />50-150 " <br />Surrogate 1,2-Dtchloroethane-l4 <br />100% <br />50-150 " <br />EX -I (W005160-05) Water Sampled <br />04 -May -0015 05 <br />Received 05 -May -00 14 40 <br />Cert -Butyl alcohol <br />ND <br />500000 <br />ugll 5000 OE05016 08 -May -00 08 -May 00 EPA 8260A <br />Methyl tert-butyl ether <br />530000 <br />10000 <br />" <br />Di -isopropyl ether <br />ND <br />10000 <br />" <br />Ethyl tert-butyl ether <br />12000 <br />10000 <br />" <br />cert -Amyl methyl ether <br />ND <br />10000 <br />" <br />Surrogate Dibromofluoromethane <br />940% <br />50-150 <br />" <br />Surrogate 1 2-Dtchloroethane-d4 <br />920% <br />50-150 <br />Sequoia Analytical - Walnut Creek <br />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 entirety0 <br />Page 6 of 11 <br />