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L <br /> Geonalytical Laboratoriesnc. <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 r <br /> Thorpe Oil Project: Stockton Fire Station-Sonora St. Date Rec'd: 4/10/02 <br /> PO Box 357 Date Started: 4/11/02 <br /> Date Completed:4/11/02 <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 /> i` <br /> Soil Sample 46 North@4' N200883 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 /> i 10 Ethyl tert-butyl ether(ETBE) ND <br /> 10 tert-Amyl methyl ether(TAME) ND <br /> i <br /> Surrogate Amnt Spiked Amnt Rec: %Recovery QC Limit 0/6 <br /> 1,2-Dichloroethane-d4 20 19.8 99 66-133 <br /> 2-Bromo-l-chloropropane 20 20.6 103 63-139 <br /> 4-Bromofluoroben7ene 20 16.8 84 64-136 <br /> Soil Sample#5 North@4' N200884 10 8260B Methyl tert-butyl ether (MTBE) ND pg/Kg <br /> 400 Ethanol ND i <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 22.8 114 66-133 <br /> 2-Bromo-1-chloropropane 20 18.9 94.5 63-139 <br /> 4-Bromofluorobenzene 20 16.0 80 64-136 <br /> i <br /> Soil Sample#4 North@4' N200885 10 8260B Methyl tert-butyl ether (MTBE) ND 11S/Kg <br /> 400 Ethanol ND <br /> 200 tert-Butanol ND <br /> 10 di-Isopropyl ether(DIPE) ND <br /> 10 Ethyl ter -butyl ether (ETBE) ND <br /> 10 tert-Amyl methyl ether(TAME) ND <br /> Surrogate Amnt Spiked Amnt Rec. °/a Recovery QC Limit% <br /> 1,2-Dichloroethane-d4 20 23.8 109 66-133 <br /> 2-Bromo-l-chloropropane 20 19.6 98 63-139 <br /> 4-Bromofluorobenzene 20 17,9 89.5 64-136 <br /> i <br /> i <br /> .Mario D'Ono io Donna Keller" <br /> Chemist Certification 4 1157 Laboratory Director <br />