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Sequoia <br />Analytical <br />404 N Wiget Lane <br />Walnut Geek, CA 94598 <br />(925) 98$-9600 <br />FAX (925) 988.-9673 <br />www sequolalabs conn <br />GFMer Ryan, Inc - Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA, 94568 Project Manager Deanna L Harding 29 -Jul -00 17 31 <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br />MW -9 (WO07484-11) Water Sampled 24 -Jul -00 14 07 Received 25 -Jul -00 14 30 <br />Ethanol ND 500 ug4 L OG26017 25 -Jul -00 26 -Jul -00 EPA 8260A <br />tert-Butyl alcohol ND 100 " <br />Methyl tert-butyl ether 35 20 ^ " <br />Di -isopropyl ether ND 20 <br />Ethyl tert butyl ether ND 20 <br />tert-Amyl methyl ether ND 20 <br />1,2-Dichloroethane ND 20 <br />Ethylene dibromide ND 20 <br />Surrogate Dibromofluoromethane 102% 50-150 " <br />Surrogate 1,2-Diehloroethane-l4 104% 50-150 " <br />MW -10A (W007484-12) Water Sampled 24 -Jul -001335 Received 25 -Jul -001430 <br />Ethanol <br />ND <br />500 ug4 1 OG26017 25 -Jul -00 26 -Jul -00 EPA 8260A <br />tert-Butyl alcohol <br />ND <br />100 <br />Mj&Ltert butyl ether <br />ND <br />20 <br />Di yl ether <br />ND <br />20 <br />Ethyl tert-butyl ether <br />ND <br />20 <br />tert-Amyl methyl ether <br />ND <br />20 <br />1,2-Dichloroethane <br />ND <br />20 <br />Ethylene dibromide <br />ND <br />20 <br />Surrogate Dtbromofluoromedme <br />Surrogate 1,2-Dichloroethane-i4 <br />102% 50-150 <br />100% 50-150 " <br />MW -10B (W007484-13) Water Sampled 24 -Jul -W1035 Received 25 -Jul -001430 <br />Ethanol <br />ND <br />500 ug4 1 0026017 25-Ju1-00 26 -Jul -00 EPA 8260A <br />tett-Butyl alcohol <br />ND <br />100 <br />Methyl tent -butyl ether <br />5.8 <br />20 " <br />D3 -isopropyl ether <br />ND <br />20 <br />Ethyl tertbutyl ether <br />ND <br />20 " <br />tart -Amyl methyl ether <br />ND <br />20 « " <br />1,2-Dicbloroethane <br />ND <br />20 " <br />Ethylene dtbrotmde <br />ND <br />20 <br />Surrogate Dtbromof toromed mre <br />104% 50-150 <br />Surrogate 1,2-Dtchloroethaned4 <br />100% 50-150 " <br />- Walnut Creek The results to dos report apply to the samples analyzed in accordance with the chain of <br />custody document Thes analytical report must be reproduced in its entirety <br />Page 12 of 26 <br />