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February 26, 2008 Lab ID : STK0831240 <br /> Luhdorff& Scalmanini Consulting Customer : 3-12023 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID T)pe Units Conc. QC Data DQO Note <br /> Wet Chem <br /> Nitrite 300.0 02/05/2008:201205 MS mg/L 300.0 99.0% 91-121 <br /> MSD mg/L 300.0 98.9% 91-121 <br /> MSRPD mgfL 100.0 0.2% <23.8 <br /> 300.0 02/05/2008:201393 CCB ppm 0.007 0.3 <br /> CCV ppm 15.00 101% 90-110 <br /> CCB ppm 0.027 0.3 <br /> CCV Ppm 15.00 103% 90-110 <br /> pH 4500-H B 02/13/2008:201466 Dup units 0.0% 4.80 <br /> 4500HB 02/13/2008:201625 CCV units 8.000 101% 95-105 <br /> CCV units 8.000 101% 1 95-105 <br /> Solids,Total Dissovled 2540 C,E 02/06/2008:201210 Blank mg/L 20 20 <br /> LCS mg/L 1000 98.2% 90-110 <br /> LCS mg/L 1000 94.2% 90-110 <br /> Dup I mg/L 2.7% 10.0 <br /> Sult;ttc 300.0 02/05/2008:201205 LCS m9/L 50.00 102% 90-110 <br /> Ms mg/L 1000 106% 78-137 <br /> MSD mg/L 1000 106% 78-137 <br /> MSRPD mgiL 100.0 0.09% <_12.3 <br /> 300.0 02/05/2008:201393 CCB ppm 0.75 2 <br /> CCV ppm 50.00 106% 90-110 <br /> CCB ppm 0.82 2 <br /> CCV ppm 50.00 1060,/. 90-110 <br /> Definition <br /> ICV Initial Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> ICB :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 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 /> 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 analyted. The <br /> recoveries are an indication of how that sample matrix affects analyte recovery. <br /> Dup :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 Quality Objective-This is the criteria against which the quality control data is compared. <br /> STK0831240:Quality Control Page 3 of 3 <br />