Approval and Promulgation of Air Quality Implementation Plans; Delaware; Amendments to the Control of Nitrogen Oxides Emissions From Industrial Boilers and Process Heaters at Petroleum Refineries

EPA is approving a State Implementation Plan (SIP) revision submitted by the State of Delaware. This revision amends Delaware's regulation that establishes controls for nitrogen oxides (NOX) emissions from industrial boilers and process heaters at petroleum refineries. The revision is a NOX emission limit for the fluid catalytic cracking unit carbon monoxide (CO) boiler at the Delaware City Refinery to provide for a facility-wide NOx emission cap compliance alternative. EPA is approving this SIP revision in accordance with the requirements of the Clean Air Act (CAA).