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June 8,2011 Lab ID : STK1134351 <br /> Live Oak Geo Environmental Customer : 3-16608 <br /> Quality Control - Inorganic <br /> onstitoent Method Date/ID Type Units Cone. QC Dam DQO Note <br /> Wet Chem <br /> Nitrate 300.0 05/24/2011:205620 LCS mg/L 20.00 97.8% 90-110 <br /> MS mg/L 400.0 101 % 88-124 <br /> (STKI 134351-001) MSD mg/L 400.0 100% 88-124 <br /> MSRPD mgtL 100.0 1.1% X9.1 <br /> 300,0 05/24/2011:207503 CCB ppm 0.080 0.4 <br /> CCV ppm 20.00 100% 90-110 <br /> CCB ppm 0.094 0.4 <br /> CCV 1m 20.00 1 10017, 1 90 110 <br /> Definition <br /> CCV :Conti ming Calibration Verification-Analyzed to verify the instrument cal ibration is within criteria. <br /> CCB :Continuing Calibration Blank-Analyzed to verify the instrument baseline is within criteria. <br /> 1.CS :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 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 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 /> Data QualitX OUective-This is the criteria a .unst which the quality control data is compared, <br /> Page 7 of 7 <br />