Reid Vapor Pressure
The U.S. Environmental Protection Agency (EPA) regulates the vapor pressure of gasoline sold between June 1 and September 15 (the summer ozone season) to limit a vehicle's hydrocarbon emissions. Reid Vapor Pressure (RVP) is the gasoline parameter used by the EPA to measure volatility, and depending on the state and month, gasoline RVP may not surpass certain levels. The ethanol industry has advocated for special waivers that would allow sales of E15 fuel that surpasses prescribed RVP levels during the summer ozone season. AFPM opposes these waivers, which the EPA does not have authority to grant.
Tier 3 Motor Vehicle Emission and Fuel Standards
The EPA published a rule in 2014 for "Tier 3" tailpipe and evaporative emissions standards for passenger cars, light-duty and some heavy-duty trucks, to be phased in from 2017 to 2025. The rule also includes reducing the sulfur content of gasoline from an annual average of 30 ppm to 10 ppm, beginning in 2017.
Mobile Source Air Toxics
In 2001, the EPA enacted rules known as Mobile Source Air Toxics (MSAT) Phase 1 to control toxic air emissions from motor vehicles and fuels. Regulations controlling the benzene content in gasoline (MSAT Phase 2) were phased in during 2011 and 2012 for most refineries and in 2015 and 2016 for small refineries. AFPM was actively involved with the EPA on the MSAT Phases 1 and 2 rulemakings to ensure that the regulations do not require unwarranted restrictions that add unnecessary costs, impact overall supply or place additional strain on the U.S. fuel production and distribution system.