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May 6, 2009 Lab ID : STK0933389 <br /> Valley Industries Customer : 3-11146 <br /> Quality Control - Inorganic <br /> Constituent Method Datdffl Type Units Cone. QC Data DQO Note <br /> Metals <br /> Nickel 3010 (SP 0903900-001) MSD mg/L 0.7992 122% 75-125 <br /> MSRPD mg/L 0.7992 2.8% 5520 <br /> PDS mgtL 0.7992 90.2% 75-125 <br /> Silver 3010 04/27/2009:204305 Blank mg/L ND <0.01 <br /> LCS mg/L 0.7992 103% 85-115 <br /> Ms mg/L 0.7992 107% 75-125 <br /> (SP 0903900-001) MSD mg/L 0.7992 109% 75-125 <br /> MSRPD mg/L 0.7992 2.1% 520.0 <br /> PDS mFJL 0.7992 1 104% 75-125 <br /> inc 3010 04/27Y2009:204305 Blank mg/L ND <0.02 <br /> LCS mg/L 1.999 105% 85-115 <br /> MS mg/L 1.999 99.4% 75-125 <br /> (SP 0903900-001) MSD mg/L 1.999 111% 75-125 <br /> MSRPD mg/L 0.7992 3.3% 5_20.0 <br /> PDS m 1.999 93.2% 75-125 <br /> Wet Chem <br /> Cyanide 450OCNCE 04124/2009:205191 CCV mg/L 01000 101% 90-110 <br /> CCB mg(L -0.0007 0.01 <br /> CCV mg/L 0.1000 98.9% 90-110 <br /> CCB I m -0.00009 0.01 <br /> H 4500-H B 04/16/2009:310518 Dup units 0.3% 4.80 <br /> 4500HB 04/16/2009:310747 CCV units 8.000 100% 95-105 <br /> CCV runts 8.000 100% 95-105 <br /> Cyanide,Total 9010B M21/2009:204095 Blank mg/L ND <0.004 <br /> LCS mg/L 0.1000 101 % 90-110 <br /> LCS mg(L 0.4000 101% 90-110 <br /> MS mg(L 0.05000 80.9% 5-223 <br /> (SP0903590-001) MSD mg(L 0.05000 80.9% 5-223 <br /> MSRPD m 0.05000 0.0% 510.0 <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 /> <'/a :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 24 of 24 <br />