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r <br /> May 25, 2006 Lab ID : STK633485 <br /> San Joaquin Co. Environmental Health Customer : 3-14432 <br /> I <br /> Quality Control - Inorganic <br /> Definitions <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 <br /> recovery. <br /> MS/MSD Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication o <br /> how that sample matrix affects analyte recovery. <br /> ICB Initial Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br /> ICV Initial 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 /> CCV Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br /> ND [Von-detect - Result was below the DQO listed for the analyte. <br /> IL DQO Data Quality Objective This is the criteria against which the quality control data is compared. <br /> 4 <br /> J <br /> I <br /> I <br /> II <br /> STK633485: Ouality Control Page 2 <br /> �_ i <br />