Many facilities are subject to one or more federal NSPS or NESHAP standards, many of which require periodic reports, typically on a semi-annual or annual basis.
EPA, under the authority of the Clean Air Act (CAA), maintains a series of regulations in 40 CFR Part 60 called the New Source Performance Standards (NSPS). Each NSPS regulation establishes emission limits and/or work practice requirements for an equipment category, sometimes in a certain industry, to control one or more criteria pollutants such as NOx, SOx, PM, and VOC.
EPA also maintains a series of regulations in 40 CFR Part 61 and 40 CFR Part 63 called the National Emission Standards for Hazardous Air Pollutants (NESHAP). The NESHAP program regulates 187 hazardous air pollutants (HAPs) known to cause cancer or other health issues, including benzene, mercury, and asbestos. The original Part 61 NESHAP standards, promulgated before the 1990 Clean Air Act (CAA) Amendments, regulate seven (7) individual HAPs. The Part 63 NESHAP standards, promulgated after the 1990 CAA Amendments and also known as the Maximum Achievable Control Technology (MACT) standards, regulate a much broader range of HAPs in specific source categories.