Читать книгу Continuous Emission Monitoring - James A. Jahnke - Страница 36

State environmental control agencies are tasked with federal requirements to meet ambient air standards for SO₂, NO_x, ozone, and particulate matter as PM_2.5. The states receive federal funding for this purpose and institute programs to monitor ambient air concentrations of these ambient pollutants. Ambient air monitoring shelters housing analyzers that use many of the same analytical techniques as CEM systems are located across the country, providing a continuous assessment of ambient air quality.

A number of regulatory mechanisms can be used by the states to require the installation of CEM systems as a tool in meeting their goals. Because of the differences in state agency regulatory policies and work‐force capabilities and limitations, CEM programs vary greatly between the states. Several states have very stringent programs, based on CEM compliance monitoring for enforcement and public assurances. Other states, which have less stringent programs, accept EPA NSPS delegation for regulating new sources and have adopted minimum requirements for existing sources. Different types of programs delegated or otherwise employed by the states, where CEM system installations may be required, are listed in Table 2‐2.

By applying established regulatory procedures, CEM systems can also be required to be installed on other source categories or used directly for compliance. The development of such regulations typically proceeds through public hearings, combined with many approval processes. Under these procedures, it can often take several years before a regulation is issued.