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PRECISION O I N <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Friday,April 22,2005 <br /> Attention: Rich Ryan <br /> Neil O.Anderson&Associate Report Page 13 of 17 <br /> 902 Industrial Way <br /> Lodi,CA 95240 <br /> Metals by EPA 600017000 Series Methods-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RFD Limit Notes <br /> Batch AD52127-EPA 3050B <br /> Blank(AD52127-BLKI) Prepared&Analyzed:21-Apr-05 <br /> Lead ND 0.0100 mg/kg <br /> LCS(AD52127-BSI) Prepared&Analyzed:21-Apr-OS <br /> Lead — 1.01 0.0100 mglkg 1.00 101 80-120 <br /> Matrix Spike(AD52127-MSI) Source:5042114-01 Prepared&Analyzed:21-Apr-05 <br /> Lead 45.9 0.500 mglkg 50.0 3.60 85 75-125 <br /> Matrix Spike Dup(AD52127-MSDI) Source:5042114-01 Prepared&Analyzed:21-Apr-05 <br /> Lead 46.3 0.500 mg/kg 50.0 3.60 85 75-125 0.9 20 <br /> mg1L=midfigramx per Liter=ppm DLR=Detection Limit for purpose f Reporting. <br /> ug/L—micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher defection limits. <br /> RESPECTFULLY SUBMITTED, <br /> 4�j/Ow� <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane. Suite B2 Stockton CA. 95210 phone: (209) 477-8105 Fax: (209) 477-8148 <br />