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GeoAnalytical Laboratories, Inc. <br />' 1405 Kansas Avenue Modesto,CA 95351 Phone (209)572-0900 Fax (209) 572-0916 <br /> *eport# M253-09 CERTIFICATE OF ANALYSIS Date: 9/14/01 <br /> Date Recd: 9/10/01 <br /> WHF Environmental Project: Boyett Petroleum-Quarterly Date Started: 9/11/01 <br /> PO Box 427 Date Completed: 9/13/01 <br /> Oakdale CA 95361 pO# Date Sampled: 9/10/01 <br /> Time: <br /> Sampler : R.Azevedo/R.Chrun <br />' -Sample ID: MW-4 <br /> Lab ID: M308842 <br /> Method RL Analyte Results Units <br />' 8260B 0.3 Benzene 5.5 pg/L <br /> 0.3 Toluene 4.0 <br /> 0.3 Ethyl Benzene 14 <br /> 0.6 Total Xylenes 24 <br /> 1.0 Methyl tert-butyl ether (MTBE) 47 <br /> 40 Ethanol ND <br /> 20 tert-Butanol ND <br /> 1 1.0 di-Isopropyl ether (DIPE) ND <br /> 1.0 Ethyl tert-butyl ether (ETBE) ND <br /> 1.0 tert-Amyl methyl ether (TAME) ND <br />' 1.0 Ethylene dibromide (EDB) ND <br /> 0.5 1,2-Dichloroethane (1,2-DCA) ND <br /> 1 h� <br /> ' <br /> Surrogate Arrant Spiked Amnt Recovered %Recovery CC Limit% <br /> 1,2-Dichloroethane-d4 5.00 5.64 112.8 72-132 <br /> 2-Bromo-l-chloropropane 5.00 4.29 85.8 71-134 <br /> 4-Bromofluorobenzene 5.00 6.16 123.2 74-132 <br /> ario D'Onofrio Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />