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• <br /> March 23, 2009 Lab ID : STK0932215 <br /> Proactive Customer : 3-16551 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> NN et Chem <br /> BOD 5210B 03116/2009:203194 CCV mg/L 1.000 101% 80-120 <br /> CCV mg/L 1.000 101% 80-120 <br /> CCV mg/L 1.000 97.0% 80-120 <br /> CCV mg/L 1.000 97.0% 80-120 <br /> CCV mg/L 1.000 101% 80-120 <br /> 'OD 52206 03/17/2009:202764 Blank mg/L ND <20 <br /> LCS mg/L 144.6 79.3% 76-116 <br /> MS mg/L 144.6 77.1% 43-142 <br /> (CH 0971188-001) MSD mg/L 144.6 77.1% 43-142 <br /> MSRPD m L 144.6 0.0% <_13.4 <br /> 5220B 0320/2009:202916 Blank mg/L ND QO <br /> LCS mg/L 144.6 79.3% 76-116 <br /> MS mg/L 144.6 79.3% 43-142 <br /> (SP 0902631-001) MSD mg/L 144.6 77.1% 43-142 <br /> MSRPD mg/L 144.6 2.4% <_13.4 <br /> 5220D 03/17/2009:203383 CCB mg/L -4.0 20 <br /> CCB mg/L -5.6 20 <br /> CCB mg/L 4.0 20 <br /> 5220D 03120/2009:203579 CCB mg/L -5.6 20 <br /> CCB m L -5.6 20 <br /> II 9045C 03112/2009:202610 Du units 0.6% 5.84 <br /> Definition <br /> IC%, :Initial Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> IC'B :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 /> C(13 :Continuing Calibration Blank-Analyzed to verify the instrument baseline is within criteria. <br /> Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. <br /> RgIlk :Method Reagent Blank-Prepared to correct for any reagent contributions to sample result. <br /> LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. <br /> VS :Matrix Spikes-A random sample isspiked with a known amount of analyte.The recoveries are an indication of how that sample <br /> matrix affects analyte recovery. <br /> VSD :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 /> Dul :Duplicate Sample-A random sample with each batch is prepared and analyzed in duplicate.The relative percent difference is an <br /> indication of precision for the preparation and analysis. <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 /> ND :Non-detect-Result was below the DQO listed for the analyte. <br /> DQO :Data QualitX Objective-This is the criteria against Mitch the qualitontrol data is compared. <br /> Lxplanmion <br /> 435 :Sample matrix maybe affecting this analyte.Data was accepted based on the LCS or CCV recovery. <br /> 440 :Sam le northonestaeneiiX may be affectin this anal e.Data was ecce ted based on the LCS or CCV recover . <br /> Page 23 of 23 <br />