A registration form may need to be submitted to the DNR prior to installing a stationary internal combustion engine rates at less than 400 hp after March 18, 2009.  New registration forms posted on the IDNR website will guide owners and operators through a brief series of questions to determine if the engine is affected by the New Source Performance Standards (NSPS) for new, stationary internal combustion engines (40 CFR Part 60, Subparts IIII and JJJJ), and the newly revised National Emission Standards for Hazardous Air Pollutants (NESHAP) for these engines (40 CFR Part 63, Subpart ZZZZ).  If the engine is subject to NSPS or NESHAP, the owner or operator must submit the registration form to the DNR prior to installing the engine if they wish to use the 400 hp construction permit exemption.

IDNR has posted a Frequently Asked Questions document regarding the registration requirements for stationary internal combustion engines < 400 hp.