Approval and Promulgation of Implementation Plans; New Mexico; Revisions to the Particulate Matter Less Than 2.5 Micrometers (PM2.5

The Environmental Protection Agency (EPA) is proposing to approve portions of two revisions to the New Mexico SIP for the permitting of PM2.5 emissions submitted on May 23, 2011, and August 6, 2014. Together, these submittals revise the New Mexico PSD program to be consistent with the federal PSD regulations regarding the use of a significant impact level (SIL) or significant monitoring concentration (SMC) for PM2.5 emissions. We are proposing to approve these SIP revisions to regulate PM2.5 emissions in accordance with requirements of section 110 and part C of the Clean Air Act.