Air Toxics Standards for Stationary Engines
(40 CFR Part 63 Subpart ZZZZ, also known as RICE NESHAP*)
The RICE NESHAP was first promulgated in 2004, and has been amended several times since then. This NESHAP places requirements on owners and operators of a wide variety of stationary engines. DNR's adoption of the 2010 and 2013 RICE NESHAP amendments became effective on October 23, 2013. This means that DNR, rather than EPA, is now the primary authority for RICE implementation in Iowa, allowing the DNR to provide compliance assistance and outreach to facilities. RICE NESHAP responsibilities have been transferred from EPA to the DNR. * RICE NESHAP is the commonly-used acronym for the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Stationary Reciprocating Internal Combustion Engines (RICE) [40 Code of Federal Regulations (CFR) Part 63, Subpart ZZZZ]
Compliance Assistance Tools
DNR has created several compliance assistance tools for facilities subject to the RICE NESHAP.
To obtain information on whether a specific engine may be subject to the RICE NESHAP or whether it is in compliance with RICE NESHAP requirements, please contact Sarah Mousel at the DNR (Sarah.Mousel@dnr.iowa.gov or call 515-725-8403).
EPA has developed the following RICE NESHAP implementation tools and guidance:
Permit Requirements for Stationary Engines
Construction Permit Amnesty for Engines
On October 23, 2013, the Iowa DNR, along with the Polk County and Linn County Air Quality Divisions, initiated an amnesty program for engines. The intent of the amnesty was to provide Iowa businesses an opportunity to "catch up on" air quality permitting requirements they had missed, without the risk of potential enforcement actions and penalties.
The amnesty period ended on April 23, 2014. DNR is pleased to report that 110 Iowa businesses, operating 127 engines, took advantage of the amnesty and submitted the past due permit applications, registrations, or permit exemption information.
Results of DNR Air Quality Bureau's 6-month amnesty period for as-built engines (includes Linn County and Polk County):
||Number of facilities
||Number of Engines
|Obtain Construction Permit
|Submit Small Engine Registration
|Submit Exemption "g" Notification
Registration Requirement for New Engines Smaller Than 400 Horsepower
Engine Registration Forms
Engine Registration FAQ
Notification Requirement for Installation of Control Equipment on Existing Engines
Control equipment may be installed on an existing stationary engine without modifying the engine's construction permit. This permitting exemption is allowed under 567 IAC 22.1(2) "g". Facilities choosing this option are required to submit a notification to DNR 30 days prior to installing the control equipment.
If the exhaust stack for the engine will be modified significantly, a construction permit may be necessary. If you have any questions about whether your engine qualifies for this permitting exemption, please call the Construction Permit Help Line (1-877-AIR-IOWA).