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PRECISION <br /> ENVIR©-TECH <br /> .Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Friday,April 22, 2005 <br /> Attention: Rich Ryan <br /> Neil O. Anderson &Associate Report Page 15 of 17 <br /> 902 Industrial Way <br /> Lodi,CA 95240 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC APD <br /> Analyte Result Limit Units Level Result %AEC Limits RPD Limit Notes <br /> Batch AD52126-Volatiles <br /> Matrix Spike(AD52126-MSI) Source:5042114-01 Prepared:21-Apr-05 Analyzed:22-Apr-05 <br /> o-Xylene 17.8 5.04 ug/kg 20.0 ND 89 75-125 <br /> Matrix Spike Dup(AD52126-MSDI) Source:5042114-01 Prepared;21-Apr-05 Analyzed:22-Apr-05 <br /> tent-Butyl Acohol(TBA) - -- 100 50.0 ug/kg 100 0.00 100 75-125 2 20 <br /> Methyl tert-butyl Ether(MtBE) 35.6 5.00 40.0 0.00 89 75-125 2 20 <br /> Diisopropyl Ether(DIPE) 18.7 5.00 20.0 0.00 94 75-125 0.5 20 <br /> Ethyl tert-Butyl Ether(ETRE) 17.4 5.00 20.0 0.00 87 75-125 3 20 <br /> Cert-Amyl Methyl Ether(TAME) 16.4 5.00 20.0 0.00 82 75-125 5 20 <br /> Benzene 19.1 500 20.0 0.00 96 75-125 2 20 <br /> Ethylbenzene 16.0 5.00 20.0 ND 80 75-125 14 20 <br /> Toluene 16.0 5.00 20.0 ND 80 75-125 18 20 <br /> m,p-Xylene 36.0 SAO 40.0 ND 90 75-125 0 20 <br /> o-Xylene 16.0 5.00 20.0 ND 80 75-125 11 20 <br /> mg1L=milligrams per Liter-ppm DLR-Detection Limit for Purpose of Reporting. <br /> ug'L=micrograms perLiter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> t�j/Otr� <br /> Jonathan Le,Laboratory Director <br /> 7743 N WestTanP ,Suite R2 ,S`tnekton CA 95210 nhone- (209) 477-8105 Fox- (209) 477-8748 <br />