Warrenville, Ill.-Navistar International Corp. and the U.S. Environmental Protection Agency (EPA) have reached an agreement resolving Navistar’s appeal in federal courts over the agency allowing SCR-equipped diesel trucks to operate for extended periods without NOx emissions control and certifying SCR engines as meeting NOx emission requirements when they do not. According to Navistar, EPA has promised to hold a public workshop or hearing on those policies, which the agency was accused of adopting without the required public process in reliance on input from SCR engine makers. The agreement provides that EPA will “engage in a public process to reexamine its policies for future 2011 and later model year engines,” during which it will “provide a thorough review of EPA’s policies regarding operation of SCR-equipped engines.” EPA also has promised to “ensure, among other things, that SCR-equipped heavy duty diesel engines are designed to properly control emissions as required under applicable regulations.” Navistar had asked the United States Court of Appeals in Washington, D.C., to void those polices because of the irregularities in their adoption.
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