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GeoAnalytical Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br /> CERTIFICATE OF ANALYSIS <br /> Report# M263-14 Oxygenates Date: 9/25/01 <br /> Date Rec'd: 9/20/01 <br /> Foothill Engineering Project: 3rd Qtr.2001 G.W. Date Started: 9/24/01 <br /> 12793 Paddy Creek Lane Date Completed: 9/25/01 <br /> Lodi CA 95240 PO# <br /> Date Sampled: <br /> Sampler: <br /> Sample ID Lab ID RL Method Analyte Results Units <br /> MW-3 M309341 1.0 8260B Methyl tert-butyl ether{MTBE) 1.9 pg/L <br /> 40 Ethanol ND <br /> 20 tent-Butanol ND <br /> 1.0 di-Isopropyl ether(DIPE) ND <br /> 1.0 Ethyl tert-butyl ether(ETRE) ND <br /> 1.0 tert-Amyl methyl ether(TAME) ND <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> 1,2-Dichloroethane-d4 5.00 4.83 96.6 72-132 <br /> 2-Bromo-l-cMoropropane 5.00 3.99 79.8 71-134 <br /> 4-Bromofluorobenzene 5.00 4.97 99.4 74-132 <br /> MW-GMX 1 M309342 20 8260B Methyl tert-butyl ether(MTBE) 39 pg/L <br /> 800 Ethanol ND <br /> 400 tert-Butanol ND <br /> 20 di-Isopropyl ether(DIPE) ND <br /> 20 Ethyl tert-butyl ether(ETBE) ND <br /> 20 tert-Amyl methyl ether(TAME) ND <br /> Surrogate Amnt Spiked Amnt Rec. % Recovery QC Limit% <br /> 1,2-Dichloroethane-d, 100 119 119 72-132 <br /> 2-Bromo-l-chloropropane 100 97.6 97.6 71-134 <br /> 4-Bromofluorobenzene 100 102 102 74-132 <br /> Iva, <br /> Mario D'Onofrio Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />