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April 17, 2013 Lab ID : STK1332913 <br />San Joaquin County PWD -Solid Waste Div. Customer :3-2956 <br />Quality Control - Inorganic <br />Constituent <br />Method <br />Date/ID <br />Type <br />Units <br />Conc. <br />QC Data <br />DQo <br />Note <br />Wet Chem <br />OD <br />5220B <br />04/09/13:203840MCA <br />LCS <br />mg/L <br />200.0 <br />73.8% <br />73-84 <br />MS <br />mg/L <br />200.0 <br />63.8 % <br />43-142 <br />(STK1332895-002) <br />MSD <br />mg/L <br />200.0 <br />67.2% <br />43-142 <br />MSRPD <br />mg/L <br />200.0 <br />2.9% <br />515 <br />5220D <br />04/09/13:205051MCA <br />CCB <br />mg/L <br />2.8 <br />20 <br />CCV <br />mg/L <br />200.0 <br />71.3% <br />61-94 <br />CCB <br />mg/L <br />-0.5 <br />20 <br />CCV <br />mg/L <br />200.0 <br />71.3% <br />61-94 <br />Definition <br />: PDS failed, matrix - Post Digestion Spike (PDS) not within Acceptance Range (AR) because of matrix interferences affecting this <br />PDS <br />analyte. <br />ICB <br />: Initial Calibration Blank - Analyzed to verify the instrument baseline is within criteria. <br />CCV <br />: Continuing Calibration Verification - Analyzed to verify the instrument calibration is within criteria. <br />CCB <br />: Continuing Calibration Blank- Analyzed to verify the instrument baseline is within criteria. <br />Blank <br />: Method Blank - Prepared to verify that the preparation process is not contributing contamination to the samples. <br />LCS <br />: Laboratory Control Standard/Sample - Prepared to verify that the preparation process is not affecting analyte recovery. <br />: Matrix Spikes - A random sample is spiked with a known amount of analyte. The recoveries are an indication of how that sample <br />MS <br />matrix affects analyte recovery. <br />: Matrix Spike Duplicate of MS/MSD pair - A random sample duplicate is spiked with a known amount of analyted. The recoveries <br />MSD <br />are an indication of how that sample matrix affects analyte recovery. <br />: Duplicate Sample - A random sample with eacb batch is prepared and analyzed in duplicate. The relative percent difference is an <br />Dup <br />indication of precision for the preparation and analysis. <br />: MS/MSD Relative Percent Difference (RPD) - The MS relative percent difference is an indication of precision for the preparation <br />MSRPD <br />and analysis. <br />ND <br />: Non -detect - Result was below the DQO listed for the analyte. <br />DQO <br />: Data Quality Objective - This is the criteria against which the quality control data is compared. <br />Explanation <br />430 <br />: Post Digestion Spike (PDS) not within Acceptance Range (AR) because of matrix interferences affecting this analyte. <br />Page 10 of 21 0 <br />