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.- <br /> February 17, 2011 Lab ID : STK1131274 <br /> Live Oak Geo Environmental Customer : 3-16608 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Nitrate 300.0 02/10/2011:201638 LCS mg/L 20.00 96.2% 90-110 <br /> MS mg/L 400.0 102% 88-124 <br /> (STK1131274-001) MSD m91L 400.0 89.2% 88-124 <br /> MBRPD mgfL 100.0 13.3% X9.1 <br /> 300.0 02/11/2011.202187 CCB ppm 0.055 0.4 <br /> CCV ppm 20.00 96.3% 90410 <br /> CCB ppm 0.058 0.4 <br /> CCV pm 20.00 100% 90-I 10 <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 /> matrix affects analyte recovery. <br /> MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyzed.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 /> DQO :Data Quality Objective-This is the criteria a ainst which the quality control data is compared. <br /> Page 6 of 6 <br />