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QSequoia <br />� Analytical <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925)988-9600 <br />FAX (925) 988-9673 <br />www sequoWabs com <br />Wer Rran Inc - Dublin Project Chevron <br />6747 Sierra Court Suite ! Project Number Chevron # 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Poiston I8 -Apr -00 11 39 <br />Volatile Organic Compounds by EPA Method 3L6UA <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note; <br />1nf (07 59) (W0043044)2) Air Sampled <br />12 -Apr -00 07 59 <br />Received <br />13 -Apr -00 17 10 <br />1 2 4-Tntnethylbcruene <br />ND <br />50 mglm' Air 100 OD14016 14 -Apr 00 14 -Apr 00 EPA 8260A <br />1 3 5-Tnmethylbenzene <br />ND <br />50 <br />VinA chlonde <br />ND <br />50 <br />Total Xylenes <br />1200 <br />50 <br />Surrogate Drbromofluoromethane <br />104% <br />70-130 <br />Surrogate 1 2-Dichloroethane-d4 <br />960% <br />70-130 <br />Surrogate Toluene -d8 <br />980% <br />'0-130 <br />Surrogate 4-Bromofluorobenzene <br />960% <br />70-130 <br />Eff (15 15) (W004304-03) Air Sampled <br />12 -Apr -0015 15 <br />Received <br />13 -Apr -00 17 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 <br />10 <br />Bromochloromethane <br />ND <br />5 0 <br />" <br />Btomodlchloromethane <br />ND <br />5 0 <br />" <br />B44B oform <br />ND <br />5 0 <br />" <br />methane <br />ND <br />10 <br />„ <br />n-Butylbenzene <br />ND <br />5 0 <br />sec-Butylbenzene <br />ND <br />so <br />" <br />tert-Butylbenzene <br />ND <br />5 0 <br />Carbon tetrachloride <br />ND <br />5 0 <br />» » » « <br />Chlorobenzene <br />ND <br />5 0 <br />» » « <br />Chloroethane <br />ND <br />10 <br />Chloroform <br />ND <br />50 <br />Chloromedme <br />ND <br />10 <br />» » » » » « <br />2-Chlorotoluene <br />ND <br />50 <br />« <br />4-Chlomtoluene <br />ND <br />50 <br />Dibromochloromethane <br />ND <br />50 <br />1,2-Dibromoethane <br />ND <br />50 <br />" <br />Dtbromomethane <br />ND <br />5 0 <br />1,2-Drbromo-3�hloropropane <br />ND <br />10 <br />1,2 -Dichlorobenzene <br />ND <br />5 0 <br />" <br />1,3 -Dichlorobenzene <br />ND <br />5 0 <br />" <br />1,4 -Dichlorobenzene <br />ND <br />5 0 <br />" <br />Dichlorodifluoromethane <br />ND <br />10 <br />1-Dichloroethane <br />ND <br />50 <br />" <br />1 2-Dichloroethane <br />ND <br />50 <br />],I-Dichloroethene <br />ND <br />5 0 <br />cta-1 2-Dtchloroethene <br />ND <br />50 <br />i uola Analytical - Walnut Creek <br />The results in (his report apply to the samples anal) -zed in accordance with the chain of <br />custodv document This analytical report must be reproduced in its entirety <br />Page 8 of 22 <br />