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As MCR indicates, the DMG Permit discusses the series of <br /> ponds which provide treatment for the mine water discharged out <br /> of the outfall described in the CDPS Permit as Outfall 016 . As <br /> pointed out by the rationale cited by MCR, the purpose for DMG ' s <br /> requiring the construction of such ponds is to provide water <br /> treatment , thus avoiding water quality impacts, including impacts <br /> from total suspended solids, from the operation. The DMG Permit <br /> also requires MCR to properly operate and maintain and regularly <br /> clean all ponds to ensure their continued and effective treatment <br /> of the mine water prior to discharge into the stream. <br /> The CDPS Permit defines Outfall 016 and authorizes the dis- <br /> charge from Outfall 016, subject to specific limitations on the <br /> amounts of pollutants which may be discharged. The CDPS Permit <br /> does not specify what MCR must do to achieve those effluent <br /> limitations. However, any pollutant discharge in excess of the <br /> amounts authorized in the CDPS Permit violates the CDPS Permit . <br /> Both the DMG Permit and the CDPS Permit deal with the water <br /> quality impacts associated with MCR' s mining operations. How- <br /> ever , while the DMG permit generally describes the way DMG must <br /> handle its mine water and its mine water treatment , only the CDPS <br /> Permit authorizes its disposal through discharge into state <br /> waters . This authorization is conditioned upon MCR' s assuring <br /> that the pollutants contained in the discharge meet very specific <br /> effluent limitations . The two permits are complementary. The <br /> -16- <br />