AMBIENT SULFATE CONCENTRATIONS NEAR GRAND-CANYON AS A FUNCTION OF FLUCTUATING LOADS AT THE MOHAVE-POWER-PROJECT - AN EXPLORATORY ANALYSIS OF AN ATMOSPHERIC EXPERIMENT

The Mohave Power Project is an isolated coal-fired electric generating plant approximately 100 km from the nearest end of Grand Canyon Natio nal Park. There occurred unscheduled shutdowns of one or both of the p lant's generating units during a 1985-1987 ambient sulfate monitoring study at sites near the Grand Canyon. This paper exploits the resultin g variability of plant emissions during the summers of 1985-1987 for a n empirical study of the ambient particle sulfur response at the downw ind Meadview monitoring site near the western end of the Park The freq uency distribution of levels of particle sulfur at the monitoring site did not change discernibly during periods of partial or complete plan t shutdowns even when corrections are made for regional background var iations. Copyright (C) 1996 Elsevier Science Ltd.