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August 10, 2009 Lab ID : STK0936708 <br /> Veolia Water NA-Lathrop-Crossroads Customer : 3-15058 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Wet Chem <br /> Ammonia Nitrogen 4500NH3G 08/06/2009:210025 CCV mg/L 2.000 97.4% 90-110 <br /> Nitrogen,Total Kjeldahl EPA351.2 08/07/2009:210091 ICB mg/L -0.193 0.2 <br /> ICV mg/L 2.000 99.2% 90-110 <br /> CCB mg/L -0.101 0.2 <br /> CCV mg/L 2.000 101% 90-110 <br /> CCB mg/L 0.016 0.2 <br /> CCV mg/L 2.000 98.9% 90-110 <br /> CCB mg/L 0.016 0.2 <br /> CCV m /L 2.000 100% 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 recoveries <br /> 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 /> <1/4 :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 /> Page 33 of 33 <br />