Emissions major source definition

States have the option of choosing a major source definition of 5 tpy (and accepting other conditions) in order to avoid complying with a requirement that emissions be reduced 15 percent over the first 6 yr. See Section 182(b)(l)(A)(ii). 

VOC Emissions Reduction/Ozone Attainment. Tide I of the 1990 Amendments continues the process of diminishing VOC emissions from all sources to reduce o2one concentrations. A compliance timetable by category has been estabUshed, which depends on the level of current o2one concentration. The definition of a major source also depends on the o2one nonattainment category ... 

Dan Luss I believe that there is still a need to study pathological behavior, especially in systems where it is caused by the interaction of the fluid flow and chemical reaction. For example, a major problem in the design and operation of a trickle-bed reactor is the presence of local hot spots, which have caused several major explosions. I ve just been involved in litigation that resulted from a reactor explosion it caused 15 million worth of damage at a plant in Corpus Christi. Most of the existing models in the literature are oversimplified and cannot predict this important feature. A model that will predict this behavior would be an important contribution. Another example is the self-ignition of coal piles, which is the major source of emission of sulfur dioxide into the atmosphere in South Africa. It s definitely desirable to get a better quantitative understanding of this behavior and how to prevent it. 

To limit the risk of hazardous air pollutant exposure over time, the EPA mandates that all major sources of HAP emissions operate under Maximum Achievable Control Technology (MACT) standards. The EPA intends to augment and add to the current list of MACT standards additionally, there are catch-aU regulations for all major sources of HAPs. One such example is the MACT Hammer, which allows states to implement MACT standards for industries not currently addressed by EPA definitions. A list of such MACT standards, including the Miscellaneous Organic NESHAP (MON), can be referenced at http //www.dep.state.pa.us/dep/deputate/airwaste/aq/permits/nes-haps/hammer table.pdf. 

Initially, all major sources of air pollution were required to obtain an operating permit.The definition of major varies, depending on the regulatory program and geographic location of the facility. Using the emission inventory data developed as part of the compliance review. Table 4.21 provides a summary of the types of sources required to apply for operating permits. 

Linearity And Dynamic Range. There is extensive evidence that emission intensities of many atomic lines excited in an ICP source are linearly related to concentration of the corresponding analytes over a range of at least one million. Trace and major constituents are therefore determinable without changes in the operating condition of the plasma. Ideally, the detection system should have a comparable linear dynamic range performance. As previously discussed (45), there are several definitions of dynamic range that are applicable to the SPD detection system. 

Dijfuse sources are highly dynamic, spread out pollution sources and their magnitude is closely related to meteorological factors such as precipitation. Major diffuse sources under this definition include surface runoff (load from atmospheric deposition), groundwater, erosion (load from eroded material), diffuse loads of paved urban areas (atmospheric deposition, traffic, corrosion) including combined sewer overflows, since these events occur discontinuously over time and are closely related to precipitation (it has to be pointed out that emissions from urban areas are also partly involved in the point source term, so these discharges are not constant in reahty). Both point and diffuse sources contribute to the total contaminant load of rivers. 

General Definition of RACT. The EPA has defined RACT as the lowest emission limitation that a particular, existing major stationary source is capable of meeting by the application of control... 

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