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03/11/2010 15:59 209478742,6 STOCKTON STEEL PAGE 07110 <br /> February 9,2010 Lab ID : STK1030077 <br /> Stockton Steel Customer : 3-2690 <br /> Quality Control -Inorganic <br /> Constituent Method Date/1D Type Units Cone. QC Data DQO Note <br /> stews <br /> Nickel 3050 0110612010:200139 LCS mg/kg 39.96 108% 85-115 <br /> MS mg/kg 39.96 83.0% 75-125 <br /> (SP 1.000097-001) MSD mg/kg 39.96 86.1% 75-125 <br /> MSRPD mg/kg 39.96 2.7% 5520 <br /> PDS m 39.96 83.9% 75-125 <br /> Selenium 3050 01/06/2010:2001.39 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 % 75-1.25 <br /> MSRPD mg/kg 39.96 3.6% 5520 <br /> PDS I m 39.96 76.6% 75-125 <br /> silver 3050 01/1612010:200513 Blank mg/kg ND <0.015 <br /> LCs mglkg 1.998 10.3% 85-115 <br /> MS mg/kg 1.998 45.2% 75-125 435 <br /> (SP 1000095-001) MSD mg/kg 1.998 44.1 % 75-12.5 435 <br /> MSRPD mg/kg 1.998 0.9% 5_20 <br /> PDS m 1.998 39.3% 75-125 P <br /> allium 3050 01116/2010:200513 Blank mg/kg ND <0.05 <br /> LCS mgtkg 1.998 106% 85-115 <br /> MS mglkg 1.998 29.9% 75-125 435 <br /> (SP 1000095-001) MSD mg/kg 1.998 29.2% 75-125 435 <br /> MSRPD mg/kg 1.998 2.2% _CLO <br /> PDS I mgtkg 1.998 28.5% 75-125 P <br /> anadium 30.50 01/06/2010:200139 Blank mg/kg ND <0S <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% <_20 <br /> PDS mglkg 39.96 1 87.2% 1 75-125 <br /> inc 3050 01/061201.0:200139 Blank mg/kg ND <1 <br /> LCS mg/kg 99.96 108% 85-115 <br /> MS mg/kg 99.96 48.9% 75-125 435 <br /> (SP 1000097-001) MSD mg/kg 99.96 942% 75-125 435 <br /> MSRPD mag 39.96 109% 5_20 435 <br /> Antimony 6020 0112012010:200731 CCV ppb 120.0 95.4% 90-110 <br /> CCB ppb 0.63 3 <br /> CCV ppb 120.0 96.0% 90-110 <br /> CCB I pj± 0.48 3 <br /> Arsenic 6020 01/2012010:200731RCCv <br /> ppb 120.0 104% 90-110 <br /> ppb 1.03 2 <br /> ppb 120.0 105% 90-110 <br /> 0.17 2 <br /> eryllium 6020 01/20/2010:200731 ppb 120.0 103% 90-110 <br /> ppb 0.019 0.2 <br /> CCV ppb 120.0 101% 90-110 <br /> CCB b 0.013 0.2 <br /> ilver 6020 01/24/2010:200731 CCV ppb 120.0 106% 90-110 <br /> CCB ppb 0.039 0.3 <br /> CCV ppb 120.0 106% 90-110 <br /> CCB b 0.424 0.3 <br /> allium 6020 01/20/2010:200731 CCV ppb 120.0 102% 90-110 <br /> CCB ppb 0.03 4 <br /> CCV ppb 124.0 103% 90-110 <br /> CCB b 0.02 4 <br /> Page 6 of 7 <br />