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PRECISION <br /> ENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OF ANALYSIS <br /> Thursday, 4pril21, 2005 ! <br /> I <br /> ` <br /> Attention: Nancy Rosulei< <br /> Neil O. Anderson &Associate Report Page 4 of <br /> 902 Industrial Way <br /> Lodi, CA 95240 <br /> L <br /> Conventional Chemistry Parameters by APHA/EPA Methods- Quality Control <br /> Precision Enviro-Tech h <br /> t <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch AD51101-General Preparation <br /> Blank(AD51109-BLKI) Prepared&Analyzed: I1-Apr-05 <br /> Nitrate as NO3 ND 1.00 mg(L <br /> LCS(AD51109-I3SI) Prepared&Analyzed: 11-Apr-05 <br /> Nitrate as NO3 49.9 1.00 mg/l_ 50.0 100 80-120 <br /> Matrix Spike(AD51109-MSI) Source:5041108-01 Prepared&Analyzed: 1I-Apr-05 I <br /> Nitrate as NO3 47.0 2.00 mglL 50.0 ND 94 75-125 <br /> Matrix Spike Dup(AD51109-MSDI) Source:5041108-01 Prepared&Analyzed: 11-Apr-05 <br /> F,? <br /> Nitrate as NO3 45.9 2.00 mglL 50.0 ND 92 75-125 2 20 <br /> Reference(AD51109-SRMI) Prepared&Analyzed: 11-Apr-05 <br /> Nitrate as NO3 14.7 1.00 mg/L 15.3 96 80-110 <br /> a <br /> 4 <br /> k <br /> pp i <br /> �r <br /> rr <br /> F <br /> I <br /> f <br /> I <br /> I <br /> mg1L=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 /> a <br /> Jonathan Le,Laboratory Director <br /> 7743 N. West Lane . Suite B2 Stockton CA. 95210 phone: (209) 477-8105 Fax: (209) 477-8148 I <br /> 1 <br />