EPA is taking direct final action on certain amendments to the National Emission Standards for Hazardous Air Pollutants for Source Category: Gasoline Dispensing Facilities, which EPA promulgated on January 10, 2008, and amended on March 7, 2008. The January 10, 2008 rule established national emission standards for hazardous air pollutants for the facilities in the gasoline distribution (Stage I) area source category. This action only affects area source gasoline dispensing facilities with a monthly throughput of 100,000 gallons of gasoline or more. In this action, EPA is amending the pressure and vacuum vent valve cracking pressure and leak rate requirements for vapor balance systems used to control emissions from gasoline storage tanks at gasoline dispensing facilities. Newly constructed or reconstructed gasoline dispensing facilities must comply with the requirements of these amendments by the effective date of the amendments, or upon start-up, whichever is later. We are not modifying the compliance date for existing sources with a monthly throughput of 100,000 gallons of gasoline or more.