The EPA is finalizing the new source performance standards (NSPS) for nitric acid plants. Nitric acid plants include one or more nitric acid production units (NAPUs). These revisions include a change to the nitrogen oxides (NOX) emission limit, which applies to each NAPU commencing construction, modification, or reconstruction after October 14, 2011. These revisions also include additional testing and monitoring requirements.
DATES: This final rule is effective on August 14, 2012.
http://www.gpo.gov/fdsys/pkg/FR-2012-08-14/pdf/2012-19691.pdf