This action supplements our proposed amendments to National Emission Standards for Hazardous Air Pollutant (NESHAP) Emissions for Hard and Decorative Chromium Electroplating and Chromium Anodizing Tanks; and Steel Pickling-HCl Process Facilities and Hydrochloric Acid Regeneration Plants, which were published on October 21, 2010 (75 FR 65068, October 21, 2010). In that action, EPA proposed amendments to these NESHAP under section 112(d)(6) and (f)(2) of the Clean Air Act. Specifically, this action presents a new technology review and a new residual risk analysis for chromium electroplating and anodizing facilities and proposes revisions to the NESHAP based on those reviews. This action also proposes to remove an alternative compliance method for Steel Pickling hydrochloric acid regeneration plants. Finally, this action proposes to incorporate electronic reporting requirements into both NESHAP.