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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# M197-01 Date 7/18/01 <br /> Date Rec d 7/16/01 <br /> M J Kloberdanz & Associates Project Ripona Market-Quarterly Monitoring Date Started 7/16/01 <br /> P O Box 576981 Wells Date Completed 7/17/01 <br /> Modesto CA 95357 PO# <br /> Date Sampled 7/16/01 <br /> Time <br /> Sampler R Chrun/R Azevedo <br /> Sample ID MW-1 <br /> Lab ID M306822 <br /> Method RL Analyte Results Units <br /> 8260B 03 Benzene 1 1 pg/L <br /> 0 3 Toluene 6 4 <br /> 0 3 Ethyl Benzene 2 0 <br /> 0 6 Total Xylenes 9 6 <br /> 10 Methyl tent-butyl ether (MTBE) 100 <br /> 40 Ethanol ND <br /> 20 tert-Butanol ND <br /> 10 dr-Isopropyl ether (DIPE) ND <br /> 10 Ethyl tert-butyl ether (ETBE) ND <br /> 10 tert-Amyl methyl ether (TAME) ND <br /> Surrogate Amnt Spiked Arent Recovered % Recovery QC Lirrut% <br /> 1,2-Dichloroethane-d4 5 00 6 12 122 4 72-132 <br /> 2-Bromo-1-chloropropane 5 00 5 28 105 6 71-134 <br /> 0 4-Bromofluorobenzene 5 00 6 03 1206 74-132 <br /> Mario D'Onofrio Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />