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PRECISION' <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Monday,June 6, 2005 <br /> Attention: Becky Haskett <br /> Neil O. Anderson &Associate Report Page 3 of <br /> 902 Industrial Way <br /> .� Lodi, CA 95240 <br /> Conventional Chemistry Parameters by A.PHAIEPA Methods- Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AE52506-General Preparation <br /> Blank(AE52506-BLKI) Prepared&Analyzed:25-May-05 <br /> Nitrate as NO3 ND 1.00 mg/L <br /> LCS(AE52506-BSI) Prepared&Analyzed:25-May-05 <br /> Nitrate as NO3 51.7 1.00 mg/L 50.0 103 70-120 <br /> Matrix Spike(AE52506-MSI) Source:5052513-01 Prepared&Analyzed:25-May-05 <br /> Nitrate as NO3 60.6 2.00 mg/L 50.0 9.83 102 75-125 <br /> ` Matrix Spike Dup(AE52506-MSDI) Source:5052513-01 Prepared&Analyzed:25-May-05 <br /> Nitrate as NO3 60.2 2.00 mg/L 50.0 9.83 101 75-125 0.7 20 <br /> Reference(AE52506-SRMl) Prepared&Analyzed:25-May-05 <br /> Nitrate as NO3 14.7 1.00 mg/L 15.3 96 70-110 <br /> mg/L=milligrams per Liter=ppm DLR=Detection Limitfor Purpose of Reporting. <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> ` Jonathan Le,Laboratory Director <br /> 7743 N. West Lane. Suite B2 Stockton CA. 95210 phone: (209) 477-8105 Fax: (209) 477-8148 <br />