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PRECISIO <br /> ENVIRO-MCH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Friday,April 22, 2005 <br /> Attention: Becky Haskett <br /> Neil O. Anderson &Associate Report Page 4 of-5 <br /> 902 Industrial Way f <br /> Lodi, CA 95240 d <br /> R <br /> Conventional Chemistry Parameters by APHA/EPA Methods-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %REC RPD f <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> I' <br /> Batch AD52006-General Preparation <br /> Blank(AD52006-BLK1) Prepared&Analyzed:20-Apr-05 <br /> Nitrate as NO3 ND 1.00 mg/L <br /> LCS(AD52006-BS1) Prepared&Analyzed:20-Apr-05 <br /> Nitrate as NO3 166 1.00 mg/L 50.0 332 80-120 <br /> Matrix Spike(AD52006-MSI) Source: 5042012-01 Prepared&Analyzed:20-Apr-05 <br /> Nitrate as NO3 156 2.00 mg/L 50.0 0.459 311 75-125 <br /> Matrix Spike Dup(AD52006-MSDI) Source: 5042012-01 Prepared&Analyzed:20-Apr-05 <br /> Nitrate as NO3 154 2.00 mg/L 50.0 0.459 307 75-125 1 20 <br /> Reference(AD52006-SRMl) Prepared&Analyzed:20-Apr-05 <br /> Nitrate as NO3 45.5 1.00 mg/L 15.3 297 80-110 <br /> i <br /> I <br /> 1 r <br /> mg/L=milligrams per Liter—ppm DLR=Detection Limitfor Purpose ofRaportmg. <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> i <br /> 4�j/OL-r� <br /> I <br /> �Laboratory� <br /> Jonathan Le Director, rY <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 Dhone: (2 09) 477-8105 Fax: (209) .477-8148 <br />