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i <br /> GeonalYt nical Laboratories c. <br /> 1405 Kansas Avenue Modesto, CA 95351 Phone 209 572-0900 Fax 209 572-0916 <br /> CERTIFICATE OF ANALYSIS <br /> Report# N100-11 Oxygenates Date: 4/15/02 <br /> Thorpe Oil Date Rec'd: 4/10/02 <br /> P Project: Stockton Fire Station-Sonora St. Date Started: 4/12/02 <br /> PO Box 357 Date Completed:4/12/02 <br /> Lodi CA 95241 PO# <br /> Date Sampled: 4/10/02 <br /> Sampler: R.Chrun/R.Azevedo <br /> Sample ID Lab ID RL Method Analyte Results Units <br /> Stockpile#5 N200895 10 8260B Methyl tert-butyl ether(MTBE) ND pg/Kg <br /> 400 Ethanol ND. <br /> 200 tert-Butanol ND <br /> 10 di-Isopropyl ether(DIPE) ND <br /> 10 Ethyl tert-butyl ether(ETBE) ND <br /> 10 tert-Amyl methyl ether(TAME) ND <br /> Surrogate Amnt Spiked Amnt Rec. . %Recovery QC Limit% <br /> 1,2-Dichloroethane-d4 20 18.1 90.5 66-133 <br /> 2-Bromo-1-chloropropane 20 18.1 90.5 63-139 <br /> 4-Sromofluorobenzene 20 17.6 88 64-136 <br /> Stockpile#6 N200896 10 8260B Methyl tent-butyl ether (MTBE) ND pg/Kg <br /> 400 Ethanol ND <br /> 200 tert-Butanol ND <br /> 10 di-Isopropyl ether(DIPE) ND <br /> 10 Ethyl tert-butyl ether(ETBE) ND <br /> 10 tert-Amyl methyl ether(TAME) ND <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> 1,2-Didiloroethane-d4 20 17.6 88 66-133 <br /> 2-Bromo-l-chloropropane .20 18.4 92 63-139 <br /> 4-Bromofluorobenzene 20 18.8 94 64-1.36 <br /> / r <br /> Mario D'Onofrio Donna Keller <br /> Chemist Certification # 1157 Laboratory Director i <br />