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1 GeoAnalytical Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209) 572-0900 Fax (209) 572-0916 <br /> C <br /> port# M351-15 CERTIFICATE OF ANALYSIS Date: 12/26/01 <br /> F Environmental Date Recd: 12/17/01 <br /> PO Box 427Date Started: 12/19/01 <br /> CA 95361 <br /> Oakdale Project: Boyett Petroleum - Quarterly Date Completed: 12/23/01 <br /> Date Sampled: 12/17/01 <br /> PO# Time: 10:08am <br /> ' Sample ID: MW 4 Sampler ' R Azevedo(Geo) <br /> Lab ID: M312481 <br /> Method RL Anal to Results Units <br /> 8260B 0.3 Benzene 2.0 pg/L <br /> 0.3 Toluene 6.0 <br /> ' 0.3 Ethyl Benzene 2.3 <br /> 0.6 Total Xylenes 11 <br /> 1.0 Methyl tert-butyl ether (MTBE) 17 <br /> 40 Ethanol ND <br /> 20 tert-Butanol ND <br /> 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-DicMoroethane (1,2-DCA) ND <br /> Surrogate Amnt Spiked Amnt Recovered %Recovery nr 71;—;.of <br /> 1,2-Dichloroethane-d4 5.00 6.12 122.4' Y 72-132- <br /> • 2-Bromo-l-chloropropane 5.00 4.80 96.0 71-134 <br /> 4-Bromofluorobenzene 5.00 4.63 92.6 74-132 <br />' Mario D'Onofrio Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />