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E <br /> July 1, 2009 Lab ID : STK0935644 <br /> Neil Anderson & Associates Customer : 3-9574 <br /> Quality Control - Inorganic <br /> Constituent Method Date(ID Type Units Cone. QC Data <br /> DQO Note <br /> Wet Chem <br /> Nitrate 300.0 0612412009:206617 LCS -911- 20.00 97.4% 90-110 <br /> MS m91L 400.0 102% 88-124 <br /> (STK09356 4-001) MSD mg/L 400.0 102% 88-124 <br />{ MSRPD m 100.0 0.5% 529.1 <br /> 300.0 0612412009:208122 CCB ppm 0.000 0.4 <br /> CCV ppm 20.00 100% 90.110 <br /> CCB ppm 0.000 0.4 <br /> CCV ppm 1 20.00 99.4% 90-110 <br /> Definition <br /> CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> CCB :Continuing Calibration Blank-Analyzed to verify the instrument baseline is within criteria. <br /> LCs :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. <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 /> l: 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 /> E MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> DQO Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> t <br /> I <br /> I <br /> Page 7 of 7 <br /> I <br />