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April 1,2010 Lab ID : STK1032302 <br /> Dan Costa,Inc. Customer : 3-16726 <br /> Quality Control-Inorganic <br /> Constituent Method DatellD Type Units Conc. QC Data DQO Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 4500NO3F MS mglL 4.000 105% 5-285 <br /> (SP 1002744-002) MSI] mg1L, 4.000 102% 5-285 <br /> MSRPD m 4.000 3.1% 530.4 <br /> 45WN03F 04!01!2010:203683 ICB mglL -0.009 0.1 <br /> ICV mgfL 4.000 99.2% 90,110 <br /> CCB mgtL -0.007 0.1 <br /> CCV m /L 4.000 96.6% 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 /> CC8 :Continuing Calibration Blank-Analyzed to verify the instrument baseline is within criteria. <br /> MS :Matrix Spikes-A random samples spiked with a known amount of analyte.The recoveries are an indication of horn that sample <br /> matrix affects analyte recovery. <br /> MSD :Matrix Spike Duplicate of MSIMSD pair-A random sample duplicate is spiked with a known amount of analyzed.The recoveries <br /> are an indication of how that sample matrix atrects analyte recovery. <br /> MSRPD :MSIMSD Relative Percent Difl'emnce(RPD)-The MSS 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 uafl control data is compared <br /> 1P <br /> �~ Page 7 of 7 <br /> i <br />