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PRECISION <br /> ENVIRO-TEGfl `'w <br /> Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Monday,April 25, 2005 <br /> Attention: Abigail <br /> Neil O.Anderson &Associate Report Page 4 of5 <br /> 902 Industrial Way <br /> Lodi, CA 95240 <br /> Conventional Chemistry Parameters by APHA/EPA 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 /> r. Batch AD52115-General Pre ara6o <br /> Blank(AD52115-BLK1) Prepared&Analyzed:21-Apr-05 <br /> Nitrate as NO3 ND 1.00 mg/L <br /> r <br /> LCS(AD52115-BSI) Prepared&Analyzed:21-Apr-05 <br /> Nitrate as NO3 52.6 1.00 mg/L 50.0 105 80-120 <br /> Matrix Spike(AD52115-MSI) Source:5042113-01 Prepared&Analyzed:21-Apr-05 <br /> Nitrate as NO3 117 2.00 mgt 50.0 59.7 115 75-125 <br /> Matrix Spike Dup(AD52115-MSDI) Source:5042113-01 Prepared&Analyzed:21-Apr-05 <br /> y, Nitrate as NO3 118 2.00 mg/L 50.0 59.7 117 75-125 0.9 20 <br /> Reference(AD52115-SRM1) Prepared&Analyzed:21-Apr-05 <br /> Nitrate as NO3 14.5 1.00 mg/L 15.3 95 80-110 <br /> r <br /> r <br /> r <br /> r <br /> r <br /> mgyL=milligrams per Liter=ppm DLR-Detection Limit for Purpose of Reporting. <br /> ugE—micrograms per Liter=ppb Exceptiorwl sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> r <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 Dhone: (209) 477-8105 Fax: (209) 477-8148 <br />