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The Risk and Technology Review (RTR) for the Phosphoric Acid Manufacturing and the Phosphate Fertilizer Production NESHAP were promulgated on August 19, 2015 (80 FR 50386). On October 15 and 16, 2015, the Fertilizer Institute (TFI) and the Potash Corporation of Saskatchewan (PCS) petitioned the Agency for reconsideration of aspects of the final rule. On December 4, 2015, the EPA granted reconsideration of four issues: the final monitoring requirements for low pressure drop scrubbers, the associated compliance date for these monitoring provisions, the compliance date for existing air oxidation reactors and the final total fluoride emission limit for calciners. However, prior to the reconsideration proposal, the request for reconsideration of the total fluoride emission limit was withdrawn. We proposed a response to the reconsideration issues on December 9, 2016 (81 FR 89026.) This action finalizes the EPA's response to the issues for which the EPA granted reconsideration.