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f <br /> ENVIRO-TECH <br /> Analytical Laboratory <br /> CERTIFICATE OF ANALYSIS <br /> Wednesday,April 6, 2005 <br /> Attention: Becky Haskett <br /> Neil O. Anderson &Associate Report Page 4 of5 <br /> 902 Industrial Way <br /> y . Lodi, CA 95240 <br /> !' Conventional Chemistry Parameters by APf A/EPA Methods-Quality Control <br /> Precision Enviro-Tech <br /> Reporting Spike Source %RF-C RPD <br /> y <br /> LA,alyte Result Limit Units Lcvel Result %REC Limits RPD Limit Notes <br /> Batch AD50411 -General Preparation _ <br /> { Blank(AD50411-BLKI) Prepared&Analyzed: 04-Apr-05 <br /> Nitrate as NO3 ND 1.00 mg/L <br /> LCS(AD50411-BSI) Prepared&Analyzed:04-Apr-05 <br /> Nitrate as NO3 51.7 1.00 mg/L 50.0 103 80-120 <br /> Matrix Spike(AD50411-MS1) Source:5040407-01 Prepared&Analyzed: 04-Apr-05 <br /> Nitrate as NO3 23.2 1.00 mg/L 25.0 ND 93 75-125 <br /> Matrix Spike Dup(AD50411-MSDI) Source-5040407-01 Prepared&Analyzed:04-Apr-05 <br /> Nitrate as NO3 21.9 1.00 mg/L 25.0 ND 88 75-125 6 20 <br /> Reference(AD5041 I-SRM 1) Prepared&Analyzed:04-Apr-05 <br /> Nitrate as NO3 14.7 1.00 mg/L 15.3 96 80-110 <br /> L • <br /> fi <br /> mg/L=milligrams per Liter=ppm DLR—Detection(imit for Purpose of Reporting. <br /> ag/L=micrograms per Liter—ppb Exceptional sample matrices or interferences may <br /> ; result in higher detection limits. <br /> RESPECTFULLY SUBMITTED, j <br /> k <br /> Jonathan Le,Laboratory Director <br /> 4 7743 N. West Lane . Suite B2 Stockton CA. 95210 Dhone: (209) 477-8105 Fax: (209) 477-8148 <br />