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April 14, 2004 Lab ID : STK431922 <br /> Valley Industries Customer : 3-11146 <br /> Quality Control - Inorganic <br /> Constituent Method Date/ID Type Units Conc. QC Data DQO Note <br /> Metals <br /> Cobalt 60I0B 04/06/2004:A 004CV mg/L 1.000 101% 90-110 <br /> 01-CCB mg/L ND <0.01 <br /> 01-CCV mg/L 1.000 95.8% 90-110 <br /> 02-CCB mg/L ND <0.01 <br /> 02-CCV mg/L 1.000 93.2% 90-110 <br /> Copper 3050B 03/24/2004:A209 Blank mg/kg ND <0.5 <br /> LCS mg/kg 40.00 95.6% 85-115 <br /> PDS mg/kg 40.00 100% 75-125 <br /> MS mg/kg 40.00 88.7% 75-125 <br /> (STK431993-01) MSD mg/kg 40.00 55.0% 75-125 435 <br /> MSRPD mg/kg 37.5% 520 435 <br /> 3010A 04/02/2004:A207 Blank mg/L ND <0.05 <br /> LCS mg/L 4.000 98.6% 85-115 <br /> PDS mg/L 4.000 106% 75-125 <br /> MS mg/L 4.000 98.9% 75-125 <br /> (STK431922-01) MSD mg/L 4.000 100% 75-125 <br /> MSRPD mg/L 1.1% 520.0 <br /> STLC 04/08/2004:A217 ExBlk mg/L 0.0031 0.0100 <br /> PDS mg/L 0.8000 119% 75-125 <br /> ExDup mg/L 1.1% 20 <br /> 6010B 03/24/2004:A 01-CCB mg/L ND <0.01 <br /> 01-CCV mg/L 1.000 99.6% 90-110 <br /> 02-CCB mg/L ND <0.01 <br /> 02-CCV mg/L 1.000 103% 90-110 <br /> 04/06/2004:A 00-ICB mg/L ND <0.01 <br /> 0o-ICV mg/L 1.000 100% 90-110 <br /> 01-CCB mg/L ND <0.01 <br /> Ol-CCV mg/L 1.000 96.6% 90-110 <br /> 02-CCB mg/L ND <0.01 <br /> 02-CCV mg/L 1.000 95.9% 90-110 <br /> 04/07/2004:A 004CB mg/L ND <0.01 <br /> 00-ICV mg/L 1.000 100% 90-110 <br /> 01-CCB mg/L ND <0.01 <br /> o1-CCV mg/L 1.000 102% 90-110 <br /> Lead 3050B 03/24/2004:A209 Blank mg/kg ND <0.5 <br /> LCS mg/kg 40.00 96.2% 85-115 <br /> PDS mg/kg 40.00 99.2% 75-125 <br /> MS mg/kg 40.00 78.8% 75-125 <br /> (STK431993-01) MSD mg/kg 40.00 52.5% 75-125 435 <br /> MSRPD mg/kg 38.2% 520 435 <br /> 3010A 04/02/2004:A207 Blank mg/L ND <0.05 <br /> LCS mg/L 4.000 103% 85-115 <br /> PDS mg/L 4.000 106% 75-125 <br /> MS mg/L 4.000 99.6% 75-125 <br /> (STK431922-01) MSD mg/L 4.000 102% 75-125 <br /> MSRPD mg/L 1.9% 520.0 <br /> Report continued on next page... <br /> STK431922: Quality Control Page 5 <br />