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L <br /> April 22, 2009 Lab ID : STK0933467 <br /> Neil Anderson & Associates Customer : 3-9574 <br /> Quality Control - Inorganic <br /> Constituent Method DatefID Type Units Cone- QC Data DQO Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F 04/22/2009:204110 MS mg/L 0.2000 1920% <'/4 <br /> (STK0933467-001) MSD mg/L 0.2000 1870% <Y4 <br /> MSRPD M911, 0.2000 1.4% 530.4 <br /> 450ONO3F 04/22/2009:205051 ICB m9/L 0.012 0.1 <br /> ICV mg/L 4.000 95.5% 90-110 <br /> CCB mg/L 0.019 0.1 <br /> CCV mg1L 4.000 94.4% 90-110 <br /> Definition <br /> ICV :Initial Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> ICB :Initial Calibration Blank-Analyzed to verify the instrument baseline is within criteria. <br /> CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> r CCB :Continuing Calibration Blank-Analyzed to verify the instrument baseline is within criteria. <br /> MS :Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample <br /> matrix affects analyte recovery. <br /> MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries <br /> are an indication of how that sample matrix affects analyte recovery. <br /> MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> High Sample Background-Spike concentration was less than one forth of the sample concentration. <br /> DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 7 of 7 <br />