The US Environmental Protection Agency (EPA) issued the Mobile Source Toxics (MSAT) Rule on February 26, 2007 (40 CFR Parts 59, 80, 85 and 86). This rule required refiners to reduce the average benzen..
The US Environmental Protection Agency (EPA) issued the Mobile Source Toxics (MSAT) Rule on February 26, 2007 (40 CFR Parts 59, 80, 85 and 86). This rule required refiners to reduce the average benzene concentration in the gasoline pool to 0.62 vol% or less by January 1, 2011. Refiners producing higher levels could reduce their concentration by purchasing credits, but they are capped at a maximum actual average concentration of 1.3 vol%.
The MSAT ruling has led many refineries to upgrade processing to meet the new benzene limits. Because the majority of benzene in blended gasoline (by some estimates 70%–85%) originates from reformate, reducing the benzene levels in the reformate off
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