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Sequoia <br />� Analytical <br />404 N Wlget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www secluoialabs com <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 18 -Apr -00 11 39 <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analvzed Method Note: <br />Eff (07 56) (WO04304-01) Air Sampled 12 -Apr -00 07 56 Received 13 -Apr -00 17 10 <br />Naphthalene <br />ND <br />10 mg/m' Air 10 OD14016 14 -Apr -00 14 -Apr 00 EPA 8260A <br />n-Propylbenzene <br />56 <br />50 <br />Styrene <br />ND <br />5 0 <br />I i 1,2 -Tetrachloroethane <br />ND <br />so <br />1,1,2,2 -Tetrachloroethane <br />ND <br />50 <br />Tetrachloroethene <br />ND <br />50 <br />" <br />Toluene <br />290 <br />50 <br />" <br />1 2 3-Tnchlorobenzene <br />ND <br />50 <br />1 2,4-Tnehlorobenzene <br />ND <br />so <br />I 1,1-Tnchloroethane <br />ND <br />50 <br />" <br />11,2-Tnchloroethaiie <br />ND <br />5 0 <br />" <br />Trichloroethene <br />ND <br />5 0 <br />" <br />Trichlorofluoromethane <br />ND <br />10 <br />" <br />1,2,3-Tnchloropropane <br />ND <br />5 0 <br />" <br />21 <br />5 0 <br />" <br />04-Trimethylbenzene <br />,5-Trtmethylbenzene <br />8 6 <br />5 0 <br />Vinyl chloride <br />ND <br />5 0 <br />" <br />Total Xyienes <br />220 <br />50 <br />" <br />Surrogate Dibromofluaromethane <br />102% <br />70-130 " <br />Surrogate 1,1-Dichloroethane-d4 <br />940% <br />70-130 " <br />Surrogate Toluene -d8 <br />960% <br />70-130 " <br />Surrogate 4-Bronrofluorobenzene <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 mg/m' <br />Air 100 OD14016 14 -Apr -00 t4 -Apr -00 EPA 8260A <br />Bromobenzene <br />ND <br />50 <br />Bromochloromethane <br />ND <br />50 <br />Bromodichloromethane <br />ND <br />50 <br />Bromoform <br />ND <br />50 <br />Bromomethane <br />ND <br />100 <br />" <br />n-Butylbenzene <br />ND <br />50 <br />sec-Butylbenzene <br />ND <br />50 <br />" <br />tert-Butylbenzene <br />ND <br />50 <br />" <br />Carbon tetrachloride <br />ND <br />50 <br />" <br />Chlorobenzene <br />ND <br />50 <br />Chloroethane <br />ND <br />100 <br />Chloroform <br />ND <br />50 <br />" <br />Chloromethane <br />ND <br />100 <br />" <br />equoia 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 entirety <br />Page 6 of 22 <br />