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PRECISION' <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Thursday,April 21, 2005 <br /> Attention: Becky Haskett <br /> Neil O. Anderson &Associate Report Page 4 of <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 /> Batch AD51204-General Preparation <br /> Blank(AD51204-BLKI) Prepared&Analyzed: 12-Apr-05 <br /> Nitrate as NO3 ND 1.00 mg/L <br /> LCS(AD51204-BS1) Prepared&Analyzed: 12-Apr-05 <br /> _ Nitrate as NO3 49.1 1.00 mg/L 50.0 98 80-120 <br /> Matrix Spike(AD51204-MS1) Source:5041212-01 Prepared&Analyzed: 12-Apr-05 <br /> Nitrate as NO3 39.6 2.00 mg/L 50.0 ND 79 75-125 <br /> ` Matrix Spike Dup(AD51204-MSD1) Source:5041212-01 Prepared&Analyzed: 12-Apr-05 <br /> Nitrate as NO3 40.5 2.00 mg/L 50.0 ND 81 75-125 2 20 <br /> Reference(AD51204-SRMI) Prepared&Analyzed: 12-Apr-05 <br /> Nitrate as NO3 14.4 1.00 mg/L 15.3 94 80-110 <br /> am <br /> mg/L=milligrams per Liter=ppm DLR=Detection Limit for 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 />