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<br /> <br />CYPRUS ORCHARD VALLEY COAL CORPORATION <br />COLORADO MINED LAND RECLAMATION BOARD CERTIFICATION <br />ORCHARD VALLEY WEST MINE SEDIMENT POND <br />(NPDES OUTFACE 006) <br />TEMPORARY REPAIR CERTIFICATION <br /> <br />I, Bradley J. Bourquin, a registered professional engineer in the <br />state of Colorado, in conformance with the abatement measures <br />detailed in Notice of Violation C-92-007, do hereby certify that <br />temporary repair work on the outfall riser at the Orchard Valley <br />West Mine Sediment Pond has, to the best of my knowledge, been <br />completed to ensure proper function of the installation. Work <br />temporarily sealing the leak detected on April 16, 1992 was <br />completed on April 25, 1992. Permanent repair work (i.e. gasket <br />replacement) will be conducted as soon as water quality constraints <br />allow accumulated water in the pond to be discharged. Treatment <br />measures to bring the ponded water into compliance with NPDES <br />discharge standards are currently underway. The pond will be <br />inspected regularly in the interim to ensure that the riser remains <br />functional. An additional certification will be provided upon <br />completion of final repair work. <br />`•~ <br />Bradle Bour uin <br />Colorad P.E. o. 23703 <br />~.e 9,1992 <br />Date <br />• <br />