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May 5, 2009 Lab ID : STK0933137 <br /> Valley Industries Customer : 3-11146 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Metals <br /> Nickel 3010 (SP 0903634-001) MSD mg/L 0.7992 105% 75-125 <br /> MSRPD mg/L 0.7992 0.3% 520 <br /> PDS m 0.7992 101% 75-125 <br /> ilver 3010 04/17/2009:203986 Blank mg/L ND <0.01 <br /> LCS mg/L 0.7992 104% 85-115 <br /> MS mg/L 0.7992 106% 75-125 <br /> (SP 0903634-001) MSD mg/L 0.7992 107% 75-125 <br /> MSRPD mg/L 0.7992 0.7% <20.0 <br /> PDS mWL 0.7992 103% 1 75-125 <br /> inc 3010 04/17/2009:203986 Blank mg(L ND <0.02 <br /> LCS mg(L 1.999 105% 85-115 <br /> MS mg/L 1.999 104% 75-125 <br /> (SP 0903634-001) MSD mgt- 1.999 105% 75-125 <br /> MSRPD mg(L 0.7992 0.6% 520.0 <br /> PDS 1.999 101% 75-125 <br /> Wet Chem <br /> Cyanide 450OCNCE 04/15/2009:204783 CCV mg/L 0.1000 106% 90-110 <br /> CCB mg/L -0.00009 0.01 <br /> CCV mg/L 0.1000 103% 90-110 <br /> CCB I m -0.00009 0.01 <br /> H 4500-H B 04/09/2009:310490 Dup units 0.1% 4.80 <br /> 4500HB 04/09/2009:310703 CCV units 8.000 100% 95-105 <br /> CCV units 8.000 99.6% 95-105 <br /> Cyanide,Total 9010B 04/14/2009:203810 Blank mg/L ND <0.004 <br /> LCS mg/L 0.1000 106% 90-110 <br /> LCS mg/L 0.4000 96.0% 90-110 <br /> MS mg/L 0.05000 109% 5-223 <br /> (STK0933021-002) MSD mg/L 0.05000 107% 5-223 <br /> MSRPD m 0.05000 <br /> Definition <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 /> DQO Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 26 of 26 <br />