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Geornalytical Laboratories,*#nc. <br />1405 Kansas Avenue Modesto, CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br />CERTIFICATE OF ANALYSIS <br />Report# P122-12 Oxygenates Date: 5/09/03 <br />Thorpe Oil Project: Thorpe's Yard <br />PO Box 357 <br />Lodi CA 95241 PO# <br />Date Rec'd: 5/02/03 <br />Date Started: 5/06/03 <br />Date Completed:5/06/03 <br />Date Sampled: 5/02/03 <br />Sampler: R. Azevedo (Geo) <br />Sample ID Lab ID RL Method Analyte Results Units <br />Stock Pile #1,2,3,4,5,6 P200658, <br />10 8260B <br />Methyl tert-butyl ether (MTBE) <br />ND <br />µg/Kg <br />P200659, <br />400 <br />Ethanol <br />ND <br />tert-Butanol <br />P200660, <br />200 <br />tert-Butanol <br />ND <br />ND <br />P200661, <br />10 <br />di -Isopropyl ether (DIPE) <br />ND <br />P200662, <br />P200663 <br />10 <br />Ethyl tert-butyl ether (ETBE) <br />ND <br />Surrogate <br />Amnt Spiked Amnt Rec. <br />10 <br />tert-Amyl methyl ether (TAME) <br />ND <br />20 21.3 <br />106.5 <br />Surrogate <br />Amnt Spiked Amnt Rec. <br />% Recovery <br />QC Limit % <br />4-Bromofluorobenzene <br />1,2-Dichloroethane-d4 <br />20 22.5 <br />112.5 <br />66-133 <br />2-Bromo-l-chloropropane 20 22.8 <br />114.0 <br />63-139 <br />4-Bromofluorobenzene <br />20 18.0 <br />90.0 <br />64-136 <br />Dispenser #3 P200664 <br />10 8260B <br />Methyl tert-butyl ether (MTBE) <br />ND <br />µg/Kg <br />400 <br />Ethanol <br />ND <br />200 <br />tert-Butanol <br />ND <br />10 <br />di -Isopropyl ether (DIPE) <br />ND <br />10 <br />Ethyl tert-butyl ether (ETBE) <br />ND <br />10 <br />tert-Amyl methyl ether (TAME) <br />ND <br />Surrogate <br />Amat Spiked Amnt Rec. <br />% Recovery <br />QC Limit % <br />1,2-Dichloroethane-d4 <br />20 17.4 <br />87.0 <br />66-133 <br />2-Bromo-l-chloropropane 20 19.2 <br />96.0 <br />63-139 <br />4-Bromofluorobenzene <br />20 19.5 <br />97.5 <br />64-136 <br />Dispenser #4 P200665 10 8260B <br />Methyl tert-butyl ether (MTBE) <br />ND <br />gg/Kg <br />400 <br />Ethanol <br />ND <br />200 <br />tert-Butanol <br />ND <br />10 <br />di -Isopropyl ether (DIPE) <br />ND <br />10 <br />Ethyl tert-butyl ether (ETBE) <br />ND <br />10 <br />tert-Amyl methyl ether (TAME) <br />ND <br />Surrogate <br />Amnt Spiked Amnt Rec. <br />% Recovery <br />QC Limit % <br />1,2-Dichloroethane-d4 <br />20 21.3 <br />106.5 <br />66-133 <br />2-Bromo-l-chloropropane 20 25.5 <br />127.5 <br />63-139 <br />4-Bromofluorobenzene <br />20 18.2 <br />91.0 <br />64-136 <br />Mario D'Onofrio <br />Chemist <br />Certification # 1157 <br />/�� ;t <br />Donna Keller <br />Laboratory Director <br />