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April 7, 2009 Lab ID : STK0932169 <br /> San Joaquin County Solid Waste Customer : 3-2956 <br /> Quality Control-Inorganic <br /> onstituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> et Chem <br /> itrate 300.0 (VI 0940408-001) MSD mg/L 400.0 101% 88-124 <br /> MSRPD mg/L 100.0 0.9% <29.1 <br /> 300.0 03/05/2009:202942 CCB ppm 0.000 0.4 <br /> CCV ppm 20.00 97.9% 90-110 <br /> CCB ppm 0.000 0.4 <br /> CCV ppm 20.00 98.3% 90-110 <br /> CCB ppm 0.000 0.4 <br /> CCV ppm 20.00 98.4% 90-110 <br /> ulfate 300.0 03/05/2009:202379 LCS mg/L 50.00 101% 90-110 <br /> MS mg/L 1000 100% 78-137 <br /> (VI 0940408-001) MSD mg/L 1000 102% 78-137 <br /> MSRPD m 100.0 1.4% _512.3 <br /> 300.0 03/05/2009:202942 CCB ppm 0.00 2 <br /> CCV ppm 50.00 102% 90-110 <br /> CCB ppm 0.00 2 <br /> CCV ppm 50.00 102% 90-110 <br /> CCB ppm 0.00 2 <br /> CCV p2m 50.00 103% 90-110 <br /> Definition <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 /> <'/e :High Sample Background-Spike concentration was less than one forth of the sample concentration. <br /> DQO :Data uali Ob cctive-This is the criteria against which the quality control data is compared. <br /> Page 20 of 27 <br />