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September 6, 2011 Lab ID : STK1137299 <br />Forward Inc. Customer :3-8692 <br />Quality Control - Inorganic <br />Constituent <br />Method <br />Date/ID <br />Type <br />Units <br />Cone. <br />QC Data <br />DQO <br />Note <br />Metals <br />Nt ickel <br />3010 <br />08/22/11:209199amb <br />PDS <br />mglL <br />0.8000 <br />109% <br />75-125 <br />Selenium <br />3010 <br />08/22/11:209I99amb <br />Blank <br />nig/L <br />ND <br /><0.01 <br />LCS <br />tng/L <br />0.7996 <br />104% <br />80-120 <br />MS <br />nig/L <br />0.7996 <br />109% <br />75-125 <br />(CC 1182022-001) <br />MSD <br />mg/L <br />0.7996 <br />110% <br />75-125 <br />MSRPD <br />ntg/L <br />0.7988 <br />0.8% <br />1520 <br />PDS <br />tit <br />0.7996 <br />110% <br />1 75-125 <br />Silver <br />3010 <br />08122/11:209199anib <br />Blank <br />nig/L <br />ND <br /><0.01 <br />LCS <br />mg/L <br />0.7988 <br />100% <br />85-115 <br />MS <br />tng/1. <br />0.7988 <br />105% <br />75-125 <br />(CC 1182022-001) <br />MSB <br />mg/C. <br />0.7988 <br />106% <br />75-125 <br />MSRPD <br />tng/L <br />0.7988 <br />0.5% <br />520.0 <br />PDS <br />nigtl, <br />1 0.7988 <br />105% <br />75-125 <br />Thallium <br />3010 <br />08/22/11:209199ainb <br />Blank <br />mg/L <br />ND <br /><0.01 <br />LCS <br />mg/L <br />0.7996 <br />99.4% <br />85-115 <br />MS <br />ntg/L <br />0.7996 <br />103% <br />75-125 <br />(CC 1182022-001) <br />MSD <br />ntg/L <br />0.7996 <br />106% <br />75-125 <br />MSRPD, <br />nig/L <br />0.7988 <br />2.2% <br />520.0 <br />PDS <br />m L <br />0.7996 <br />1 107% <br />75-125 <br />Vanadium <br />3010 <br />08/22/11:209199anib <br />Blank <br />ntg/L <br />ND <br /><0.01 <br />LCS <br />mg/1, <br />0.8000 <br />104% <br />85-115 <br />MS <br />nig/L <br />0.8000 <br />108% <br />75-125 <br />(CC 1182022-001) <br />MSD <br />mg/L <br />0.8000 <br />109% <br />75-125 <br />MSRPD <br />mg/L <br />0.7988 <br />0.090/0 <br />520.0 <br />PDS <br />nig/L <br />0.8000 <br />108010 <br />75-125 <br />Mercury <br />7470 <br />08/19/11:209145AC <br />Blank <br />ug[L <br />ND <br /><0.02 <br />LCS <br />ug/L <br />0.1998 <br />92.5% <br />85-115 <br />MS <br />ug/L <br />0.1998 <br />91.5 % <br />75-125 <br />(STKI137123-001) <br />MSD <br />ug/L <br />0.1998 <br />89.1% <br />75-125 <br />MSRPD <br />uLlt, <br />0.1998 <br />2.5% <br />5_20 <br />Wet Client <br />PH <br />4500-H B <br />(SP 1108324-002) <br />Dup <br />units <br />0.0% <br />4.80 <br />4500HB <br />08/18/11:212091CAA <br />CCV <br />units <br />8.000 <br />100% <br />95-105 <br />CCV <br />units <br />8.000 <br />100% <br />95-105 <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 />: Matrix Spikes - A random sanple is spiked with a known runount of analyte. The recoveries are an indication of ]tow 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 />arc an indication of how that sample matrix affects analyte recovery. <br />: Duplicate Sample - A random sample with each 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 : Nott -detect - Result was below the DQO listed for the analyte. <br />DQO : Data Quality Objective - This is the criteria a aittst which the quality control data is compared. <br />Explanation <br />360 : CCV above Acceptance Range (AR). Samples which were tion detect for this analyte were accepted. <br />Page 8 of 14 <br />