This action will address a granted reconsideration issue and several technical corrections for the agency's promulgated final National Emission Standards for Hazardous Air Pollutants (NESHAP) for Clay Ceramics Manufacturing, as well as address several technical corrections for the NESHAP for Brick and Structural Clay Manufacturing. These two final rules were promulgated on October 26, 2015 (80 FR 65470), 40 CFR part 63, subparts KKKKK and JJJJJ respectively, with a small final technical correction amendment for subpart KKKKK promulgated on December 4, 2015. The two NESHAP established emission limitations and work practice requirements based on maximum achievable control technology for control of hazardous air pollutants from kilns and dryers at new and existing brick and clay products, and clay ceramics plants. The granted reconsideration issue is based on a revision for subpart KKKKK, to the location of the temperature probe when demonstrating dioxin compliance (changed from a kiln probe to a stack probe for the final rule), which occurred as an outcome of comments received on the proposal. Since the public did not have a chance to comment on the revision during the comment period, the reconsideration was granted. In addition to this proposed revision to the temperature location related to dioxin limit compliance, several technical corrections will be proposed covering compliance parameters for water curtains, and visible emission location sites. The Brick and Structural Clay rule will also be opened only for technical corrections related to visible emission levels and using opacity as an indicator of compliance with the particulate matter standard.