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February 9,2010 Lab ID : STK1030077 <br /> Stockton Steel Customer : 3-2690 <br /> Quality Control -Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Metals <br /> Nickel 3050 01/06/2010:200139 LCS mg/kg 39.96 108% 85-115 <br /> MS mg/kg 39.96 83.0% 75-125 <br /> (SP 1000097-001) MSD mg/kg 39.96 86.1 % 75-125 <br /> MSRPD mg/kg 39.96 2.7% <20 <br /> PDS TILE 39.96 83.9% 75-125 <br /> Selenium 3050 01/06/2010:200139 Blank mg/kg ND <0.5 <br /> LCS mg/kg 39.96 98.7% 85-115 <br /> MS mg/kg 39.96 75.3% 75-125 <br /> (SP 1000097-001) MSD mg/kg 39.96 78.1% 75-125 <br /> MSRPD mglkg 39.96 3.6% -<-20 <br /> PDS mgtkg 39.96 76.6% 75-125 <br /> Silver 3050 01/16/2010:200513 Blank -9&9 ND <0.015 <br /> LCS mg/kg 1.998 103% 85-115 <br /> MS mg/kg 1.998 45.2'% 75-125 435 <br /> (SP 1000095-001) MSD mg/kg 1.998 44.1% 75-125 435 <br /> MSRPD mg/kg 1.998 0.9% <20 <br /> PDS Me& 1.998 39.3% 75-125 P <br /> allium 3050 01/16/2010:200513 Blank mg/kg ND <0.05 <br /> LCS mg/kg 1.998 106% 85-115 <br /> MS mg/kg 1.998 29.9% 75-125 435 <br /> (SP 1000095-001) MSD mg/kg 1.998 29.2'% 75-125 435 <br /> MSRPD mglkg 1.998 2.2% <20 <br /> PDS ingft 1.998 28.5% 75-125 P <br /> Vanadium 3050 01/06/2010:200139 Blank mg/kg ND <0.5 <br /> LCS mg/kg 39.96 107% 85-115 <br /> MS mg/kg 39.96 87.8% 75-125 <br /> (SP 1000097-001) MSD mg/kg 39.96 87.7% 75-125 <br /> MSRPD mg/kg 39.96 0.05% 520 <br /> PDS m 39.96 87.2'% 75-125 <br /> inc 30.50 01/06/2010:200139 Blank mg/kg ND <I <br /> LCS mg/kg 99.96 108% 85-115 <br /> ]VIS mg/kg 99.96 48.9% 75-125 435 <br /> (SP 1000097-001) MSD mg/kg 99.96 942% 75-125 435 <br /> MSRPD m 39.96 109% <20 435 <br /> Antimony 6020 01/2012010:200731 CCV ppb 120.0 95.4% 90-110 <br /> CCB ppb 0.63 3 <br /> CCV ppb 120.0 96.0'% 90-110 <br /> CCD ppb 0.48 3 <br /> Arsenic 6020 01/2012010:200731 CCV ppb 120.0 104% 90-110 <br /> CCB ppb 1.03 2 <br /> CCV ppb 120.0 105% 90-110 <br /> CCB 20 0.17 2 <br /> Beryllium 6020 01120/2010:200731 CCV ppb 120.0 10.3% 90-110 <br /> CCB ppb 0.019 0.2 <br /> CCV ppb 120.0 101% 90-110 <br /> CCB I ppb 1 0.013 0.2 <br /> Silver 6020 01/20/2010:200731 CCV ppb 120.0 106% 90-110 <br /> CCB ppb 0.039 0.3 <br /> CCV ppb 120.0 106% 90-110 <br /> CCB ppb 0.024 0.3 <br /> hallRun 6020 01/20/2010:200731 CCVppb 120.0 102% 90-110 <br /> CCB ppb 0.03 4 <br /> CCV ppb 120.0 103% 90-110 <br /> CCB pLb 0.02 4 <br /> Page 6 of 7 <br />