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PRECISION — <br /> ` ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANAL YSIS <br /> Wednesday,April 77, 2005 <br /> Attention: Conor McGee <br /> Neil O.Anderson &Associate Report Page 3 of5 <br /> 902 Industrial Way <br /> Lodi, CA 95240 <br /> EDB and DBCP by EPA Method 504.1 -Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> .� Analyte Result Limit units Level Result %RFC Limits RPD Limit Notes <br /> Batch AD52613-Solvent Extraction <br /> LBlank(AD52613-BLKI) Prepared&Analyzed:26-Apr-OS <br /> 1,2-Dibromo-3-chloropropane ND 0.0200 ug/l <br /> i 1,2-Dibromoethane(EDB) ND 0.0100 " <br /> L LCS(AD52613-BSI) Prepared&Analyzed:26-Apr-05 <br /> 1,2-1)ibromo-3chloropropane 0.347 0.0200 ug/l 0.294 118 75-125 <br /> L1,2-Dibromoethane(EDB) 0.347 0.0100 0.294 118 75-125 <br /> Matrix Spike(AD52613-MSI) Source:5042210-01 Prepared&Analyzed:26-Apr-05 <br /> 1,2-Dibromo-3-chlompropane 2.00 0.0200 ug/1 0.294 1.62 129 75-125 <br /> 1,2-Dibromoethane(EDB) 0.318 0.0100 0.294 ND 108 75-125 <br /> Matrix Spike Dup(AD52613-MSDI) Source:5042210-01 Prepared&Analyzed:26-Apr-05 <br /> 1,2-Dibromo-3chlotopropane 2.00 0.0200 ug/l 0.294 1.62 129 75-125 0 20 <br /> L1,2-Dibromoethane(EDB) 0.318 0.0100 0.294 ND 108 75-125 0 20 <br /> V <br /> L <br /> L <br /> L <br /> L mgE=milligrams per Liter=ppm DLR=Detection Limit for Purpose of Reporting. <br /> ug/L=micrograms per Liter—ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> LRESPECTFULLY SUBMITTED, <br /> L Jonathan Le,Laboratory Director <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 Dhone: (209) 477-8105 Fax: (209) 477-8148 <br />