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1 <br /> water quality. The operation of heavy equipment may result <br /> in some contribution of oil , grease and dust to the surface <br /> ' water system, particularly during periods of storm runoff. <br /> Revegetation of mined land will reduce erosion potential and <br /> protect water quality of surface runoff. Ground water <br /> ' flows are subject to natural filtration and do not create <br /> any water quality problems. <br /> III <br /> I <br /> 1 <br /> 1 <br /> 1 <br /> C-24 <br /> 1 <br /> 1 <br />