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March 31, 2010 Lab ID : STK1032476 <br /> Live Oak Geo Environmental Customer : 3-16608 <br /> Quality Control - Inorganic <br /> Constituent Method Date(ID Type Units Conc. QC Data DQO Note <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F MS mg/L 4.000 92.1% 5-285 <br /> (STK1032378-001) MSD mg/L 4.000 89.3% 5-285 <br /> MSRPD 4.000 1.2% <30.4 <br /> 4500NO3F 03/2412010:203318TC CCB n1g/L -0.059 0.1 <br /> CCV mg/L 4.000 94.5% 90-110 <br /> CCB mg/L 0.034 0.1 <br /> CCV 4.000 91.0% 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 /> 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 /> D O :Data Objective-This is the criteria against which the quality control data is compared. <br /> E <br /> Page 7 of 7 <br />