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_ PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Thursday, February 23, 2006 <br /> Attention: Mike Toy <br /> Dillon &Murphy Report Pagel oj3 <br /> P.O. BOX 2180 <br /> Lodi, CA 95241 <br /> Conventional Chemistry Parameters by APHA/EPA Methods- Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %uREC RPD <br /> Analyte Result Limit Units Level Result -/.RFC Limits RPD Limit Notes <br /> r <br /> Batch AB61010-General Preparation <br /> Blank(AB61010-BLKI) Prepared&Analyzed: 10-Feb-06 <br /> Nitrate as NO3 ND 1.00 mg/L <br /> LCS(AB61010-BS1) Prepared&Analyzed: 10-Feb-06 <br /> Nitrate as NO3 36.7 1.11 mg/L 44.4 83 70-120 <br /> Matrix Spike(AB61010-MSI) Source:6021007-06 Prepared&Analyzed: 10-Feb-06 <br /> Nitrate as NO3 41.9 1.11 mg/L 44.4 0.974 92 75-125 <br /> r <br /> Matrix Spike Dup(AB61010-MSD1) Source:6021007-06 Prepared&Analyzed: 10-Feb-06 <br /> Nitrate as NO3 38.5 1.11 mg/L 44.4 0.974 85 75-125 8 20 <br /> V <br /> r <br /> .WL=milligrams per Lifer=ppm DLR=Detection Limit forPurpose of Reporting. <br /> ug/L=micrograms per Liter—ppb Exceptional sample matrices or interferences may <br /> hm remlr m higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> Jonathan Le,Laboratory Director <br /> r. 7743 N. West Lane . Suite B2 Stockton CA. 95210 Dhone: (209) 477-8105 Fax: (209) 477-8148 <br />