Читать книгу Continuous Emission Monitoring - James A. Jahnke - Страница 42

To reduce the regional transport of ozone in the Northeastern United States, the U.S. EPA instituted a NO_x control program, known as the NO_x Budget Program, which was operated by the 20 eastern states plus Washington DC. The trading program began in 2003 and was discontinued in 2008. In the program, NO_x emissions were capped for affected sources and NO_x allowances were traded between sources under the program rules during the summer ozone season. The NO_x Budget Program differed from the acid rain program in that it was administered by the states under State Implementation Plans, whereas the acid rain program is administered directly by the Federal EPA. In addition to the electric utilities, sources such as cement plants, petroleum refineries, and pulp and paper mills also participated in the program. The U.S. EPA provided guidance through the requirement of 40 CFR 96 to achieve consistency between the state programs (U.S. EPA 1998).

As in the acid rain program, an essential program component was the determination of the yearly NO_x mass emissions. CEM systems incorporating NO_x monitors, flow monitors, diluent gas monitors, and a DAHS provided the basis for these determinations. Because CEM systems for SO₂ and NO_x had already been installed on fossil‐fuel electric generating units and other sources in the Part 60 and Part 75 programs, the primary impact on their monitoring requirements was in modifying CEM system software to accommodate the NO_x Budget reporting requirements. NO_x Budget CEM system certification and performance requirements referenced those of Part 75.