National Emission Standards for Hazardous Air Pollutants: Site Remediation Residual Risk and Technology Review

요약

The U.S. Environmental Protection Agency (EPA) is proposing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for the Site Remediation source category. This proposal presents the results of the residual risk and technology review (RTR) conducted as required under the Clean Air Act (CAA). Based on the results of the residual risk review, the EPA is proposing that risks due to emissions of air toxics are acceptable and that no revision to the standards is required to provide an ample margin of safety to protect public health. Based on the technology review, we are proposing to amend the requirements for leak detection and repair (LDAR). In addition, the EPA is proposing amendments to revise regulatory provisions pertaining to emissions during periods of startup, shutdown and malfunction (SSM), including adding requirements for pressure relief devices; to add requirements for electronic submittal of semiannual reports and performance test results; to clarify provisions pertaining to open-ended valves and lines; and to make minor clarifications and corrections. The proposed revisions to the rule would increase the level of emissions control and environ