S 2105
A bill to amend the Clean Air Act to clarify when a physical change in, or change in the method of operation of, a stationary source constitutes a modification, and for other purposes.
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Bill overview
This bill clarifies how the Environmental Protection Agency (EPA) determines if a change to a factory, power plant, or other stationary source is considered a ‘modification’ under the Clean Air Act. Currently, the definition of ‘modification’ can be unclear, leading to potential disputes over permitting requirements. The bill specifically outlines that a change is only considered a modification if it results in a higher maximum hourly emissions rate than the source’s original design or its emissions rate over the past 10 years. This aims to provide more certainty and consistency in applying Clean Air Act regulations.
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