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November 3, 2009 Lab ID : STK0939912 <br /> Live Oak Geo Environmental Customer - 3-16608 <br /> Quality Control-Inorganic <br /> gsdWent Method Datd[D Type Units Conn QC Data DQ0 Nobe <br /> Wet Chem <br /> Nitrate+Nitrite as N 450ONO3F 1012812009:211304 MS mg/L 4.000 86.5% 5-285 <br /> (CH 0977914-002) MSD mg/L 4.000 77.7% 5-285 <br /> MSRPD m 4.000 10,9% X0.4 <br /> 450ONO3F 1012812009:214080 CCB LL <br /> 0.4003 0.i <br /> CCV 4.000 95.5% 90-110 <br /> CCB -0.014 0.1 <br /> CCV 4-000 92.2% 90-110 <br />{ Definition <br /> CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br />' CCB :Continuing Calibration Wank-Analyzed to verify the instrument baseline is within criteria. <br /> MS :Matrix Spikes-A random sample is spiked with a[mown amount of analyte..The recoveries are an indication of how[bat sample <br /> matrix affects analyte recovery. <br /> MSD Matrix Spike Duplicate of MSIMSD pair-A random sample duplicate is spiked with a known amrnutt of analyzed.The recoveries <br /> are an indicatim of how that sample matrix affects analyte recovery. <br /> MSRPD :MSIMSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> Data a ObWtive-[his is the criteria against which the quality control data is cmperTq. <br /> i <br /> l <br /> Page 9 of 9 <br />