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June 16, 2014 Lab ID : STK1434669 <br /> Luhdorff& Sealmanini, Consulting Eng. Customer : 3-12023 <br /> Quality Control - Inorganic <br /> Constituent Method Dam/ID 'Type Units Cone. QC Data DQO NoI <br /> -- <br /> Wet Chem <br /> M HAS 5540C 05/15/14:207423AMM CCV m 1.000 97.5% 90-110 <br /> MBAS Extraction 5540C 05/15/14:205885AMM Blank mg/L ND <0.1 — <br /> LCS mp/L 0.5000 97.5% 65-109 <br /> BS mg/L 0.5000 85.5% 65-109 <br /> BSD mg/L 0.5000 85.5% 65-109 <br /> BSRPD m 0.5000 0.0 50.1 <br /> Definition <br /> ICE : 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 /> CCB :Continuing Calibration Blank-Analyzed m 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 /> 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 sam <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 recov <br /> are an indication of how that sample matrix affects analyte recovery. <br /> BS :Blank Spikes-A blank is spiked with a known amount of analyte.It is prepared to verify that the preparation process is not <br /> affecting analyte recovery. <br /> BSD :Blank Spike Duplicate of BS/BSD pair-A blank duplicate is spiked with a known amount of analyte.It is prepared to verify t <br /> the preparation process is not affecting analyte recovery. <br /> Dup :Duplicate Sample-A random sample with each hatch is prepared and analyzed in duplicate.The relative percent difference isindication ofprecision for the preparation and analysis. <br /> MSRPD MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication ofprecision for the preparaand analysis.BSRPD :BS/BSD Relative Percent Difference(RPD)-The BS relative percent difference is an indication of precision for the preparati <br /> and analysis. <br /> ND :Non-detect-Result was below the DQO listed for the analyte. <br /> High Sample Background-Spike concentration was less than one forth of the sample concentration. <br /> DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Explanation <br /> 435 Sam le matrix may be affecting this anal e.Data was accepted based on the LCS or CCV recovery. <br /> Amended Page 12 of 12 <br />