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Sequoia <br />Analytical <br />ler Ryan, Inc - Dublin <br />6747 Sierra Court Suite J <br />Dublin CA 94568 <br />Project Chevron <br />Project Number Chevron #9-5775 <br />Project Manager Scott Polston <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />404 N Wget Lane <br />Walnut Creek, CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoiaiabs com <br />Reported <br />26 -Jul -00 10 48 <br />Reporting <br />Result Limit Units Dilution Batch Prepared Analyzed Method <br />INF (W007366-04) Water Sampled 19 -Jul -00 10 22 Received 19 -Jul -00 14 00 <br />tert-Butyl alcohol <br />30000 <br />10000 ug/1 100 OG20015 19 -Jul -00 19 -Jul -00 EPA 8260A <br />Methyl tert-butyl ether <br />220000 <br />10000 " 5000 20 -Jul -00 <br />Di -isopropyl ether <br />ND <br />200 t00 " 19 -Jul -00 " <br />Ethyl tent -butyl ether <br />2600 <br />200 " <br />tart -Amyl methyl ether <br />730 <br />200 " <br />Surrogate Dtbromofluoromethane <br />050 <br />100% 50-150 <br />Surrogate I 1 Dichloroethane-d4 <br />tert-Amyl methyl ether <br />980% 50-150 " <br />EFFLUENT (W007366-05) Air Sampled 19 -Jul -00 12 00 Received 19Jul-0014 00 <br />tert-Butyl alcohol <br />ND <br />20 mg1W Air 1 OG19014 19 -Jul -00 <br />19 -Jul -00 EPA 8260A <br />Methyl tert-butyl ether <br />ND <br />050 <br />" <br />Di -isopropyl ether <br />ND <br />050 <br />Ethyl tert-butyl ether <br />ND <br />050 <br />tert-Amyl methyl ether <br />ND <br />050 <br />" <br />Dibromofluonomedume <br />980% <br />50-150 n <br />n <br />Ovate <br />ate 1,1 Diehloroethane-l4 <br />100% <br />30-150 " <br />INFLUENT (W007366.06) Air <br />Sampled 194ul-00 12 05 Received <br />19 -Jul -00 14 00 <br />tert-Butyl alcohol <br />170 <br />20 mg/m' Air 1 0019014 19 -Jul -00 <br />19-JulO EPA 9260A <br />Methyl tert-butyl ether <br />990 <br />25 <br />50 <br />20 -Jul -00 " <br />Di -isopropyl ether <br />ND <br />050 <br />" I M <br />l9 !111-00 <br />Ethyl tert-butyl ether <br />44 <br />50 <br />^ 10 " <br />204111-00 " <br />tert Amyl methyl ether <br />16 <br />50 <br />" <br />Surrogate Dlbmmofluoromedurne <br />940% <br />50-150 <br />19,Jrd-00 n <br />Surrogate 1,2-DtchlotaethimeJ4 <br />176% <br />50-150 <br />� <br />Sequoia Analvucal - Walnut Creels The results rn dus report apply to the samples mwdwed to accordance wrth the churn of <br />custody documenE This analypeal repo►4 must be reproduced to its entrrety <br />Page 6 of 11 <br />02 <br />