In a June 28, 2013 letter, the U.S. Environmental Protection Agency (EPA) has announced that it is reconsidering three aspects of 40 CFR 63, Subpart ZZZZ, that address emergency reciprocating internal combustion engines (RICE). This includes:
• The timing of compliance with the ultra-low sulfur diesel requirement for emergency RICE;
• The details of emergency RICE reporting requirements; and
• The conditions under which emergency RICE are allowed up to 50 hours of operation for mitigation of local transmission or distribution limitations.
The provisions being reconsidered were just finalized in a recent January 1, 2013 final rule, which itself amended a prior 2010 final rule in response to several petitions for reconsideration and legal challenges. EPA will publish notice of its proposed reconsideration in the Federal Register, which will provide more detail on these issues and EPA’s reconsideration process. Additional information on EPA’s RICE rules is available here.