The Environmental Appeals Board at the U.S. Environmental Protection Agency on Aug. 30 rejected an appeal from a private citizen, Shawn Dolan, of an air permit that EPA’s Region 9 had issued in April to the Salt River Project for a coal cleaning project at the Navajo Generating Station in Arizona.
Dolan wanted a different technical method used to measure opacity from the project. But the board affirmed that the measurement methods approved under the permit are sufficient.
Navajo is a 2,250-MW coal plant. The New Source Review permit at issue authorized construction and operation of a Refined Coal Treatment System, which involves treating raw coal with cement kiln dust and calcium bromide so as to reduce stack emissions of mercury and NOx. This system would include two new coal feed belt conveyors that would divert coal from the existing plant feed system, with additives then mixed with the coal and the coal then returned to the existing conveyor system.