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EPA is amending specific provisions in the new source performance standard (NSPS) for stationary combustion turbines to resolve issues and questions raised by the utility air regulatory group (UARG) on the original final rulemaking published on July 6, 2006 (71 FR 38482), and to address other technical and editorial issues that have been identified since promulgation. The primary issues raised in the petition include the NOx standard and the monitoring and reporting requirements for owners/operators that elect to install NOx CEMS. This rule will also amend the location and wording of existing paragraphs to clarify the requirements of the NSPS. It will also reduce compliance burden for owners/operators of stationary combustion turbines that meet the applicability criteria of and that are complying with the SO2 standard in either subparts J or Ja (standards of performance for petroleum refineries) or only burn fuels containing inherently low amounts of sulfur from complying with the otherwise applicable SO2 limit in subpart KKKK. In addition, at proposal, we requested comment on defining new and reconstruction specific to subpart KKKK. We received multiple comments on the options we are considering. The final rule will address the issues raised by the commenters. Also, in recognition that the ultra-low sulfur diesel requirements include Hawaii, the Commonwealth of Puerto Rico, and the Virgin Islands, we are evaluating requiring owner/operators of turbines in these locations to the meet the same sulfur requirements as owner/operators of turbines located in State territories. Finally, we are requiring electronic reporting of performance testing.