New Source Performance Standards Review for Nonmetallic Mineral Processing Plants; and Amendment to Subpart UUU Applicability

EPA is finalizing amendments to the Standards of Performance for Nonmetallic Mineral Processing Plant(s) (NMPP). These final amendments include revisions to the emission limits for NMPP affected facilities which commence construction, modification, or reconstruction on or after April 22, 2008. These final amendments for NMPP also include: Additional testing and monitoring requirements for affected facilities that commence construction, modification, or reconstruction on or after April 22, 2008; exemption of affected facilities that process wet material from this final rule; changes to simplify the notification requirements for all affected facilities; and changes to definitions and various clarifications. We are not taking any final action in this document regarding the amendment to the Standards of Performance for Calciners and Dryers in Mineral Industries discussed in the proposed rule.