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The National C L Shaver
Looking AheadToward Implementation of T G Pace
Discussion of Federal Regulatory Approaches B V Polkowsky and
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acid aerosol air pollution air quality ambient ammonium sulfate analysis annular denuder Atmos atmospheric average AWMA Bryce Canyon calculated chemical Class I areas collected color components contrast contribution deposition determined distribution elemental carbon emissions Environ Environmental episodes Equation estimate evaluation extinction coefficient Figure flow fraction Grand Canyon haze Hopi Point impact impactor J.G. Watson Lake Powell levels light extinction light scattering Meadview measurements meteorological method monitoring National Park Service Navajo Generating Station nephelometer nitrate observed optical organic carbon oxidation parameters particles percent period plume power plants radiance receptor modeling regional haze regression relationship relative humidity Research Research Triangle Park response sampler scattering coefficient scene seasonal smelter species standard sulfur concentrations sulfur dioxide synoptic Table target Teflon tracer transmissometer transmitter transport uncertainty values variables visibility impairment visibility protection visual range WHITEX wind winter