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4 Sequoia <br />� Analytical <br />404 N WigetLane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequotalabs corn <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 Ot-Jun-00 1105 <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />�nalrte Result Limit Units Dilution Batch Prepared Anahzed Method Note <br />EX -1 (WO05732-01) Water Sampled 25-Mav-00 15 15 <br />Received 26-Mas400 17 13 <br />tert-Butvl alcohol <br />ND <br />100000 ug11 1000 OE30023 30 -May -00 30 May -00 EPA 8260A <br />Methvl tort -butyl ether <br />350000 <br />2000 " <br />Di -isopropyl ether <br />ND <br />2000 " <br />Eth-, I tett-Butyl ether <br />9300 <br />2000 <br />tLrt-Amvl methyl ether <br />3200 <br />2000 " <br />SurroKate DibromoJluoromethane <br />104% 50-150 <br />Surrogate 12-Diehloroethane-d4 <br />112% 50-150 <br />• <br />Sequoia Analvttcal -Walnut Creek The results in flus report apply to the samples analyzed in accordance with the chart <br />custody document This analytical report muss be reproduced rn us e_L <br />Page 3 of 7 <br />