The Environmental Protection Agency established regulations to substantially lower the sulfur levels in gasoline in 2000. On January 1, 2006, the sulfur content for gasoline produced at most refineries was lowered to a per-gallon maximum of 80 parts per million (ppm), with an overall maximum annual average of 30 ppm. This regulation was phased-in for refineries in the Rocky Mountain area and for small refiners.
AFPM members continue to work to ensure that EPA’s regulations for sulfur content of gasoline fuel are met – or exceeded. Our members are dedicated to working cooperatively with government at all levels to ensure both an adequate supply of transportation fuels and compliance with environmental and other regulatory standards.
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EPA promulgated a rule in 2014 for "Tier 3" tailpipe and evaporative emissions standards for passenger cars, light-duty and some heavy-duty trucks, phased in MY 2017-2025. This also includes reducing the sulfur content of gasoline from an annual average of 30 ppm to 10 ppm, beginning in 2017 (small refiners/small volume refineries have a 3-year delay).
API/AFPM Tier 3 Proposal Cover Letter
API/AFPM Tier 3 Proposal Detailed Comments
Statement on Proposal for Tier 3
Reid vapor pressure (RVP) is a gasoline parameter that measures volatility. It is controlled by EPA and individual states to limit a vehicle's hydrocarbon emissions.
The Environmental Protection Agency established regulations to substantially lower the sulfur levels in diesel fuels in 2001 and 2004. In January 2001, EPA issued rules that require refiners to reduce the sulfur content in highway diesel fuel by 97 percent. The sulfur content of this fuel – called Ultra Low-Sulfur Diesel, or ULSD – may not exceed 15 parts per million (ppm).
In addition, EPA’s June 2004 rules require refiners to reduce the sulfur content in nonroad diesel in progressive steps, so that by June 2014, all nonroad diesel meets the 15 ppm standard.
EPA published a marine fuel sulfur rule in 2010 that includes a maximum 1,000 ppm sulfur content for distillate and residual fuel oil used in large vessels beginning in 2014 unless alternative devices (such as exhaust gas scrubbers), procedures or compliance options are used. This does not apply to steamships operating exclusively on the Great Lakes.
AFPM members continue to work to ensure that EPA’s regulations for sulfur content of diesel fuel are met or exceeded. U.S. refiners have invested about $8 billion to meet the new diesel requirements.
American Fuel & Petrochemical Manufacturers
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