EPA Proposed Draft Guidance on Certification Requirements for Heavy-Duty Diesel Engines Using SCR

 

On June 7, 2011, the EPA published a notice in the Federal Register at 76 FR 32886 requesting comment on draft guidance for complying with adjustable parameter regulations at 40 CFR 86.094-22 as they apply to certification of on-highway heavy-duty diesel engines using SCR.  Once finalized, this guidance will be used by EPA in reviewing applications for certification involving SCR received on or after the effective date of the guidance. 

Comments will be due 30 days after the notice is published in the Federal Register.

Docket reference: EPA-HQ-OAR-2010-0444

EPA contact: Greg Orehowsky, Heavy-Duty and Nonraod Engine Group, Compliance and Innovative Strategies Division, Office of Transportation and Air Quality, (202) 343-9292,orehowsky.gregory@epa.gov.