A settling CAA defendant that violated new source review, PSD, and Title V provisions at five sulfuric acid manufacturing plants in California, Idaho, and Wyoming must pay an $899,000 civil penalty, must contribute $200,000 to a program that incentivizes the replacement of old wood- or pellet-burning devices with new, cleaner hearth options to reduce emissions of fine particulate matter (PM), volatile organic compounds, carbon monoxide, and hazardous air pollutants, must comply with specified numerical emission limitations at all plants, and must meet numerical emission limitations on sulfuric acid mist and fine PM at one of the plants.