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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# N165-08 Oxygenates Date: 6/19/02 <br /> Foothill Engineering Date Rec'd: 6/14/02 <br /> g� g Project: 2nd Qtr. 2002 G.W. 6/18/02 <br /> :Date Started <br /> 12793 Paddy Creek Lane Date Carted: ed:6/18/02 <br /> Lodi CA 95240 PO# <br /> Date Sampled: 6/11/02 <br /> Sampler: Don Light <br /> Sample YD Lab I RL Method Analyte Results Units <br /> MW-2 N305994 40 8260B Methyl tert-butyl ether(MTBE) ND pg/L <br /> 1600 Ethanol ND <br /> 800 tert-Butanol ND <br /> 40 di-Isopropyl ether(DIPS) ND <br /> 40 Ethyl tert-butyl ether(ETBE) ND <br /> 40 tert-Amyl methyl ether(TAME) ND <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> 1,2-Dichloroethane-d4 200 184 92 72-132 <br /> 2-Bromo-l-chloropropane 200 186 93 71-134 <br /> 4-Bromofluorobencene 200 213 106.5 74-132 <br /> Elevated detection limits due to high level of non-target analytes. <br /> WX-1 N305995 40 8260E Methyl tent-butyl ether(MTBE) ND pg/L <br /> 1600 Ethanol ND <br /> 800 tert-Butanol ND <br /> 40 di-Isopropyl ether(DIPE) ND <br /> 40 Ethyl tent-butyl ether(ETBE) ND <br /> 40 tert-Amyl methyl ether(TAME) ND <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> 1,2-Dichloroethane-d4 200 202 101 72-132 <br /> 2-Bromo-l-chloropropane 200 200 100 71-134 <br /> 4-Bromofluorobenzene 200 196 98 74-132 <br /> Elevated detection limits due to high level of non-target analytes. <br /> • <br /> (ario D'O�n.1�i- Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />