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<br />Effluent Limitation Exceedances <br />March 2008 <br />Parameter Limit Type Effluent Analytical <br /> <br />I Limitation Result <br />Total suspended solids Daily 30 mg/L 48 mg/L <br />(TSS) maximum 3/7/08 <br /> 30-day average 20 m /L 33 mg/L <br />It should be noted that less than 106,000 gallons of water were discharged in March <br />2008. This is well below the permitted discharge volume of 930,000 gallons (based on <br />the 0.03 mgd permit limit over 31 days). <br />Two exceedances occurred for total suspended solids (TSS); one exceedance each for the <br />average and daily maximum effluent limitations. As discussed above, the mine has been <br />dewatered and water is being pumped to the treatment plant as it collects in the existing <br />mine sump, located in the mine workings. The mine sump contains a considerable <br />amount of sediment that is being pumped out of the mine with the mine water. Energy <br />Fuels has been rehabilitating the mine workings in the area of the mine sump during the <br />months of February and March. This has lead to the mine water containing abnormally <br />high amounts of sediment. Currently, the sump area is being rehabilitated. Because we <br />received the February 2008 sample results in late March, the TSS exceedances were not <br />known until after all of the March 2008 discharges had taken place. Energy Fuels has <br />since added a polymer flocculent at the untreated water tank to control the TSS levels in <br />the discharge. Visual examination of the treated discharge water shows noticeable <br />improvement over the February and March water quality. Analytical results have not yet <br />been received for samples taken in April 2008. <br />In past months, selenium and radium 226+228 levels have exceeded the discharge permit <br />limitations. Recent addition of sodium metabisulfite has been effective in controlling the <br />selenium levels without sacrificing effective treatment of radium 226+228. The radium <br />226+228 levels have been below the permit limitation since January 18, 2008. <br />Dissolved iron and sulfate levels are being monitoring in the discharge samples at the <br />request of WQCD. Dissolved iron in the discharge samples ranged from <0.03 to 0.22 <br />mg/L. Sulfate in the discharge samples ranged from 102 to 164 mg/L. <br />i,'ncrgv 1`uels, Inc. <br />4b1?'14 . C3'ileY?1' ? 14:1 S. COl'n <br />44 Union Blvd, Suite 600 <br />Lakewood, Colorado 90228 <br />Phone: 303-974-2140 <br />Fax-: 303-Q74-2141