This action finalizes the residual risk and technology review (RTR) conducted for the Site Remediation source category regulated under national emission standards for hazardous air pollutants (NESHAP). The U.S. Environmental Protection Agency (EPA) is finalizing the proposed determination that risks due to emissions of air toxics from site remediation sources 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 results of our technology review, we are promulgating the proposed changes to the leak detection and repair (LDAR) program. In addition, the EPA is finalizing amendments to revise regulatory provisions pertaining to emissions during periods of startup, shutdown and malfunction (SSM), including finalizing work practice requirements for pressure relief devices (PRDs) and the 240- hour maintenance period for control devices on tanks. We are finalizing requirements for electronic submittal of semiannual reports and performance test results. Finally, we are making minor clarifications and corrections. The final revisions to the rule will increase the level of emissions control and environmental protection provided by the Site Remediation NESHAP.