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Sequoia <br />Analytical <br />Gettler Ryan Inc -Dublin Project Cheaper <br />6747 Sierra 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 Creek <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs com <br />Reported <br />12 -Apr -00 11 36 <br />Reportmg <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note: <br />EFF (16 47) (WOO4172-04) Air Sampled 06 -Apr -00 16 47 Received 07 -Apr -00 17 45 <br />Cert -Butyl alcohol <br />ND <br />20 mg/ml Air 1 OD10012 <br />09 -Apr -00 09 Apr -00 EPA 9260A <br />Methyl tert-butyl ether <br />ND <br />050 <br />Di -isopropyl ether <br />ND <br />050 <br />" <br />Ethyl tert-butyl ether <br />ND <br />050 <br />tert-Amyl methyl ether <br />ND <br />050 <br />" <br />Surrogate Dibromofluoromelhane <br />104% <br />50-150 <br />" <br />Surrogate 12-Dichloroethane-d4 <br />106% <br />50-150 " <br />EX -I (W004172-05) Water Sampled <br />06 -Apr -00 00 00 <br />Received <br />07 -Apr -00 17 45 <br />tert-Butyl alcohol <br />37000 <br />10000 <br />ugll 100 OD09001 <br />09 -Apr -00 09 -Apr -00 EPA 8260A <br />Methyl tent -butyl ether <br />500000 <br />10000 <br />5000 <br />" 10 -Apr -00 <br />Di -isopropyl ether <br />ND <br />200 <br />100 <br />" 09 -Apr -00 <br />Ethyl tert-butyl ether <br />11000 <br />200 <br />" <br />tert-Amyl methyl ether <br />4300 <br />200 <br />" <br />0!rogate Dibromofluoromethane <br />100910 <br />50-150 <br />irogate 1 2-Diehlaroethane-d4 <br />104% <br />50-150 <br />" <br />4Wuoia Analytical - Walnut Creek The results ,n this report apply to the samples analyzed in accordance with the chat,, of <br />cuslody document This analytical report must be reproduced in its entirety <br />Page 6 of 12 <br />