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GeoAnalytical Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto, CA 95351 Phone (209)572-0900 Fax (209)572-0916 <br /> ort# R151-13 CERTIFICATE OF ANALYSIS Date: 6/02/05 <br /> Date Recd: 5/31/05 <br /> Foothill Engineering Date Started: 6/01/05 <br /> 12793 faddy Creek Lane Project: 2nd Qtr.2005 Date Completed:6/01/05 <br /> Lodi CA 95240 Date Sampled: 5/31/05 <br /> PO# Time- <br /> Sample ID: EW- 1 Sampler <br /> Lab ID: R303482 <br /> Method RL Analyte Results Units <br /> 8260B 3.0 Benzene ND µg/L <br /> 3.0 Toluene ND <br /> 3.0 Ethyl Benzene 169 <br /> 6.0 Total Xylenes 215 <br /> 5.0 Methyl tert-butyl ether(MTBE) ND <br /> 400 Ethanol ND <br /> 50 tert-Butanol ND <br /> 5.0 di-Isopropyl ether(DIPE) ND <br /> 5.0 Ethyl tert-butyl ether(ETBE) ND <br /> 5.0 tert-Amyl methyl ether(TAME) ND <br /> 10 Ethylene dibromide(EDB) ND <br /> 5.0 1,2-Dichloroethane(1,2-DCA) ND <br /> • <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> 1,2-Dichloroethane-d4 50.0 56.9 113.8 72-132 <br /> 2-Bromo-l-chloropropane 50.0 45.4 90.8 71-134 <br /> 4-Bromofluorobenzene 50.0 59.0 118.0 74-132 <br /> kD'Onofri Donna Keller <br /> Chemist Certification # 2585 Laboratory Director <br />