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Sequoia <br />� Analytical <br />404 N Wlget Lane <br />Walnut Creels CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequolalabs corn <br />Gettler Rvan, Inc -Dublin Project Cheaper <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 12 -Apr -00 11 36 <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />Analvte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br />INF (09 53) (WO04172-01) Air Sampled <br />06 -Apr -00 09 53 <br />Received 07 -Apr -00 17 45 <br />tert-Butyl alcohol <br />ND <br />10000 mg/ml Air 500 OD10012 09 -Apr 00 09 -Apr 00 EPA 8260A <br />Methyl tert-butyl ether <br />29000 <br />630 <br />1250 <br />Di -isopropyl ether <br />ND <br />250 <br />500 <br />Ethvl tert-butyl ether <br />2300 <br />250 <br />" <br />tert-Amyl methyl ether <br />630 <br />250 <br />" <br />Surrogate Dibromofluoromethane <br />104% <br />50-150 " <br />Surrogate 1 2-Dtchloroethane-d4 <br />102% <br />50-150 " <br />EFF (09 59) (WO04172-02) Air Sampled 06 -Apr -00 09 59 Received <br />07 -Apr -0017 45 <br />tert-Butyl alcohol <br />ND <br />20 mg/ml Air 1 OD10012 09 -Apr -00 09 -Apr 00 EPA 8260A <br />Methyl tert-butyl ether <br />47 <br />050 <br />" <br />DL-tsopropyl 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 />" <br />Surrogate Dibromofluoromethane <br />100% <br />50-150 <br />Surrogate 1,2-Dichloroethane-d4 <br />102 % <br />50-150 " <br />INF (16 49) (WO04172-03) Air Sampled <br />06 -Apr -0016 49 <br />Received <br />07 -Apr -0017 45 <br />tett-Butyl alcohol <br />ND <br />25000 rriglm3 Air 1250 OD10012 09 -Apr -00 09 -Apr -00 EPA 8260A <br />Methyl tent -butyl ether <br />62000 <br />630 " <br />Di-tsopropyl ether <br />ND <br />630 " <br />Ethyl tent -butyl ether <br />3100 <br />630 " <br />tert-Amyl methyl ether <br />830 <br />630 " <br />Surrogate Dibromofluoromethane <br />100% 50-150 <br />Surrogate 1,2-Dichloroelhane-d4 <br />100% 50-150 " <br />Sequoia Analytical - Walnut Creek 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 enitrety40 <br />Page 5 of 12 <br />