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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 sequoialabs 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 6y EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />,nalyte Result Limit Units Dilution Batch Prepared Anahzed Method Note <br />Inf (07 59) (W004304-02) Air Sampkd 12 -Apr -00 07 59 Received 13 -Apr -00 17 10 <br />2,4-Tnmethylbenzene <br />ND <br />50 mg/in' <br />Air 100 0D140t6 14 -Apr -00 14 -Apr 00 EPA 8260A <br />1,3 5-Tnmethylbenzene <br />ND <br />50 <br />^ <br />Vmyl chloride <br />ND <br />50 <br />5 0 " <br />Total Xylenes <br />1200 <br />50 <br />�moform <br />momethane <br />Surrogate Dibromolluoromethane <br />10 <br />104% <br />70-130 <br />Surrogate 12-Dtchloroethane-d4 <br />sec-Butylbenzene <br />960% <br />70-130 <br />Surrogate Toluene -d8 <br />ND <br />980% <br />70-130 " <br />Surrogate 4-Bromofluorobenzene <br />50 " <br />960% <br />70-130 <br />Efi(15 15) (W004304-03) Air Sampled <br />12 -Apr -00 15 15 <br />Received <br />13 -Apr -0017 10 <br />Benzene <br />690 <br />13 mg/m3 Air 25 OD14016 14 -Apr -00 14 -Apr 00 EPA 8260A <br />Bromobenzene <br />ND <br />5 0 10 " <br />Bromochloromethane <br />ND <br />5 0 " ~ <br />Bromodichloromethane <br />ND <br />5 0 " <br />ND <br />5 0 ~ <br />�moform <br />momethane <br />ND <br />10 <br />n-Butylbenzene <br />ND <br />5 0 " ~ <br />sec-Butylbenzene <br />ND <br />5 0 " <br />tert-Butylbenzene <br />ND <br />5 0 ~ " <br />Carbon tetrachloride <br />ND <br />50 " <br />Chlorobenzene <br />ND <br />50 ^ <br />Chloroethane <br />ND <br />10 <br />Chloroform <br />ND <br />50 ^ <br />Chloromethane <br />ND <br />10 ~ ~ <br />2-Chlorotoluene <br />ND <br />5 0 <br />4-Chlorotoluene <br />ND <br />5 0 ~ ^ ~ ^ <br />Dibromochloromethane <br />ND <br />5 0 ~ <br />1,2-Dtbromoethane <br />ND <br />5 0 ^ <br />Dibromomethane <br />ND <br />5 0 <br />1,2-Dtbromo-3 -chi oropropane <br />ND <br />10 <br />2 -Dichlorobenzene <br />ND <br />5 0 " ^ <br />1,3 -Dichlorobenzene <br />ND <br />50 " <br />1,4 -Dichlorobenzene <br />ND <br />5 0 " <br />Dtchlorodifluoromethane <br />ND <br />10 ~ <br />I,1-Dichloroethane <br />ND <br />5 0 " <br />2-Dtchloroethane <br />ND <br />5 0 <br />IJ-Dichloroethene <br />ND <br />5 0 " <br />cis -1 2-Dichooroenhene <br />ND <br />50 " <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 entirety <br />Page 8 of 22 <br />