Amendments were promulgated effective July 8, 2004 to several sections of the Standards of Performance for Stationary Gas Turbines in 40 CFR part 60, subpart GG. The amendments simplify emissions monitoring, testing and reporting for combustion turbines that are simultaneously regulated under Part 60 and 40 CFR Part 75. The amendments also reflect changes in nitrogen oxides (NOX) emission control technologies and turbine design since the standards were promulgated.
This rule represents the completion of the Turbine Initiative effort, which the Agency undertook in response to concerns from the regulated community. The Turbine Initiative helps resolving testing and reporting inconsistencies and redundancies between Part 60 and Part 75, improves the cost-effectiveness of monitoring, and simplifies the process of determining compliance. The Office of Air Quality Planning and Standards (OAQPS) and the Clean Air Markets Division (CAMD) worked together on this Initiative to ensure a high level of harmony between both regulations.