Relates to emissions of toxic air contaminants

Bill S 4030 directs the Department of Environmental Conservation to establish ambient air quality standards for specific toxic air contaminants, such as benzene and mercury, by December 31, 2027. These standards must be based on scientific data regarding potential adverse human health effects. The bill requires that starting in 2028, these toxic air contaminants be incorporated into permits for "major sources" - large stationary air contamination sources. Additionally, the department must establish regulations by December 31, 2027, for fenceline monitoring by major sources, especially considering their proximity to disadvantaged communities.