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Sequoia <br />Analytical <br />•� <br />SECOR International - Rancho Cordova Project Chevron 9-5775, Lodi, CA <br />3017 Kilgore Road, Suite 100 Project Number 077 41991 043 <br />Rancho Cordova, CA 95670 Project Manager Roger Hoffmore <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />819 Sinker Avenue Suite 8 <br />Sacramento CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />www sequoialabs corn <br />Sampled 7/12100 <br />Received 7112/00 <br />Reported 7/13-14, 17100 <br />Batch Date Date Specific Reporting <br />analyte Number Prepared Analyzed Method Limit Result Units Notes* <br />MW -13 <br />5007095-08 <br />Water <br />Ethanol <br />OG13020 7/13100 7/14/00 EPA 8260A <br />500 <br />ND ug/1 <br />tert-Butyl alcohol <br />11 EPA 8260A <br />100 <br />ND <br />Methyl tert-butyl ether <br />EPA 8260A <br />2 0 <br />ND <br />Di -isopropyl ether <br />EPA 8260A <br />2 0 <br />ND <br />Ethyl tert-butyl ether <br />EPA 8260A <br />2 0 <br />ND r <br />tert-Amyl methyl ether <br />EPA 8260A <br />2 0 <br />ND <br />1,2-Dichloroethane <br />EPA 8260A <br />2 0 <br />ND " <br />Ethylene dtbromide <br />It <br />EPA 8260A <br />2 0 <br />ND " <br />Surrogate Dibromofluoromethane <br />" or 50-150 <br />EPA 8260A <br />106 Vo <br />Surrogate 1,2-Dichloroethane-d4 <br />or " 11 50-150 <br />tert-Amyl methyl ether <br />11 <br />72 0 <br />MW -5B <br />S007095-09 <br />Water <br />Ethanol <br />OG13020 <br />7113/00 <br />7/14/00 EPA 8260A <br />500 <br />ND <br />ug/l <br />Butyl alcohol <br />EPA 8260A <br />100 <br />ND <br />" <br />thyl tert-butyl ether <br />EPA 8260A <br />2 0 <br />160 <br />Di -isopropyl ether <br />EPA 8260A <br />2 0 <br />ND <br />Ethyl tert-butyl ether <br />EPA 8260A <br />2 0 <br />14 <br />tert-Amyl methyl ether <br />EPA 8260A <br />2 0 <br />ND <br />1,2-Dichloroethane <br />EPA 8260A <br />2 0 <br />ND <br />Ethylene dtbromide <br />EPA 8260A <br />2 0 <br />ND <br />Surrogate Dibromofluoromethane <br />to 50-150 <br />112 <br />% <br />Surrogate 1,2-Dichloroethane-d4 <br />50-150 <br />74 0 <br />" <br />MW -14 <br />S007095-10 <br />Water <br />Ethanol <br />0613020 <br />7113100 <br />7114100 EPA 8260A <br />5000 <br />ND <br />ug/1 D <br />tert-Butyl alcohol <br />ItEPA <br />8260A <br />1000 <br />ND <br />D <br />Methyl tert-butyl ether <br />it <br />EPA 8260A <br />20 <br />1100 <br />D <br />Di -isopropyl ether <br />EPA 8260A <br />20 <br />ND <br />�� D <br />Ethyl tert-butyl ether <br />EPA 8260A <br />20 <br />120 <br />D <br />tert-Amyl methyl ether <br />EPA 8260A <br />20 <br />ND <br />D <br />1,2-Dichloroethane <br />EPA 8260A <br />20 <br />ND <br />D <br />Ethylene dibromide <br />EPA 8260A <br />20 <br />ND <br />orD <br />Surrogate Dibromofluoromethane <br />50-150 <br />100 <br />% <br />Surrogate 1,2-Dichloroethane-d4 <br />to <br />it50-150 <br />880 <br />or <br />- Sacramento <br />*Refer to end of report jor text of notes ana aejtninons <br />Page 6 of 13 <br />