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Sequoia <br />� Analytical <br />404 N V41get Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs corn <br />Gii-ttler RN an iIIL - Dublin Project Chevron <br />6747 Sierra Court Suite j Project Number Chevron 4 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 18 -Apr -00 11 39 <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />knalvte Result Limit Units Dilution Batch Prepared Andlvzed Method Note <br />Eff (07 56) (WO043044)1) Air Sampled <br />12 -Apr -00 07 56 <br />Received <br />13 -Apr -00 17 10 <br />Naphthalene <br />ND <br />10 mF)m' <br />air 10 0D14016 14 -Apr 00 l4 -Apr 00 GPA 8260A <br />n-Propylbenzene <br />56 <br />50 <br />50 <br />Stvrene <br />ND <br />5 0 <br />Bromomethane <br />1 1 1 2 -Tetrachloroethane <br />ND <br />50 <br />ND <br />1 1,2 2-Tetracliloroethane <br />ND <br />50 <br />50 <br />Tetrachloroethene <br />ND <br />so <br />Carbon tetrachloride <br />Toluene <br />290 <br />5 0 <br />ND <br />t 2 3-TnLhiorobenzene <br />ND <br />50 <br />100 <br />12 4-Tnchlorobenzene <br />ND <br />50 <br />Chloromethane <br />1 l,l-Tnchloroethane <br />ND <br />50 <br />1 1.2-Tnchloroethane <br />ND <br />5 0 <br />Trichloroethene <br />ND <br />5 0 <br />Tnchlorolluoromethane <br />ND <br />10 <br />1,2,3-Tnchloropropane <br />ND <br />5 0 <br />Wnmethylbenzene <br />21 <br />5 0 <br />rimethylbenzene <br />86 <br />50 <br />Vmyl chloride <br />ND <br />50 <br />" <br />Total Xylenes <br />220 <br />50 <br />" <br />Surrogate Dibromofluaromethane <br />102% <br />70-130 " <br />Surrogate 1 2 Dtchloroethaned4 <br />940% <br />70-130 " <br />Surrogate Toluene-& <br />960% <br />70-130 " <br />Surrogate 4-Bromofluorobenzene <br />960% <br />70-130 " <br />Inf (07 59) (W004304-02) Air Sampled <br />12 -Apr -00 07 59 <br />Received <br />13 -Apr -00 17 10 <br />Benzene <br />3700 <br />50 mgtms Air 100 OD14016 14 -Apr -00 14 -Apr -00 EPA 8260A <br />Bromobenzene <br />ND <br />50 <br />Bromochloromethane <br />ND <br />50 " <br />Bromodichloromethane <br />ND <br />50 <br />Bromaform <br />ND <br />50 <br />Bromomethane <br />ND <br />100 ^ " <br />n-Butvlbenzene <br />ND <br />50 <br />sec -Buri [benzene <br />ND <br />50 <br />tent-Butylbenzene <br />ND <br />50 <br />Carbon tetrachloride <br />ND <br />50 " <br />Chlorobenzene <br />ND <br />50 " <br />Chloroethane <br />ND <br />100 <br />Chloroform <br />ND <br />50 <br />Chloromethane <br />ND <br />100 <br />6 la Analvocal - Walnut Creek The revultt ne duv report apply to the samples rmals,zed in accordance with the chain of <br />�uslody document This analytical report must be reproduced in us entirety <br />Page 6 of 22 <br />