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PRECISION <br /> ODENVIRO-TECH <br /> Analytical Laboratory CERTIFICATE OFANALYSIS <br /> Tuesday,January 11, 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 AA50608-General Preparation <br /> Blank(AA50608-BLKl) Pre-pared&Analyzed:06-Jan-05 <br /> Nitrate as NO3 ND 1.00 mg/L <br /> LCS(AA50608-BSI) Prepared&Analyzed:06-Jan-05 <br /> Nitrate as NO3 57.2 1.00 mg/L 50.0 114 80-120 <br /> `Matrix Spike(AA50608-MSI) Source:5010608-01 Prepared&Analyzed:06-Jan-05 <br /> Nitrate as NO3 58.0 1.00 mg/L 25.0 53.4 18 75-125 <br /> _Matrix Spike Dnp(AA50608-MSDl) Source:5010608.01 Prepared&Analyzed:06-Jan-05 <br /> Nitrate as NO3 57.4 1.00 mg/L 25.0 53.4 16 75-125 1 20 <br /> Reference(AA50608-SRMI) Prepared&Analyzed:06-Jan-05 <br /> `Nitrate as X03 14.7 1.00 mg/L 15.3 96 80-110 <br /> is <br /> r <br /> mgL—milligramsperLder=ppm DLR=Detection LimitforPurpose ofReportmg. <br /> ugE—micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> result in higher detection limbs. <br /> 67 <br /> RESPECTFULLY SUBMITTED, <br /> 6- <br /> 4�j/OL'r� <br /> Jonathan Le,Laboratory Director <br /> 1..7743 N. West Lane. Suite B2 Stockton CA. 95210 Dhone: (209) 477-8105 Fax: (209) 477-8148 <br />