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The U.S. Environmental Protection Agency (EPA) and the Iowa DNR are required by law to reduce exposure to hazardous air pollutants (HAPs). EPA has issued over 120 National Emission Standards for Hazardous Air Pollutants (NESHAP). Approximately 50 of those NESHAP affect facilities in Iowa. DNR has developed implementation tools for the NESHAP in each section listed below.
Some NESHAP apply to both major and area sources of HAP, and some apply just to one or the other. Major sources are those with facility-wide potential or actual emissions of 10 tons per year or more of any single HAP or 25 tons per year or more of a combination of HAP. Area sources are those with potential and actual emissions below the major source thresholds.
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 Casey Huck at the DNR (Casey.Huck@dnr.iowa.gov or call 515-725-9514).
On October 23, 2013, the Iowa DNR, along with the Polk County and Linn CountyAir 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):
Engine Registration Forms
Engine Registration FAQ
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).
For questions about the applicability of the 6X NESHAP to your facility, please call the Iowa DNR’s toll free air quality help line at 1-877-AIR-IOWA (1-877-247-4692). Small businesses (those with 100 or fewer Iowa employees) can also obtain free, confidential regulatory assistance from the IAEAP. You may also contact IAEAP by phone toll free at 1-800-422-3109.
Dry cleaning facilities that use perchloroethylene (also known as perc or PCE) are subject to the National Emission Standards for Hazardous Air Pollutants (NESHAP). This rule includes requirements for control equipment, leak inspections and repair, and recordkeeping and reporting.
Questions about Dry Cleaner NESHAP requirements may be directed to Casey Huck at DNR (email Casey.Huck@dnr.iowa.gov or call 515-725-9514). Small businesses (those with 100 or fewer Iowa employees) can also obtain free, confidential regulatory assistance from the Iowa Air Emissions Assistance Program (IAEAP). You may contact IAEAP by phone toll free at 1-800-422-3109, or visit their website at http://www.iwrc.org/index.cfm/services/iaeap/ for more information.
Prepared Feeds (area sources)
40 CFR Part 63, Subpart DDDDDDD
In September 2014, the Iowa DNR adopted the federal standard for the National Emission Standards for Hazardous Air Pollutants for Prepared Feeds Manufacturing at Area Sources (40 CFR 63 Subpart DDDDDDD), otherwise known as the 7D Rule.
The 7D rule applies to a facility that manufactures prepared animal feed or additives for animal feed (sometimes known as "feed mill"). Affected facilities must comply with specific requirements to minimize dust and emissions from storage, use, or handling of materials containing chromium and manganese.
The Iowa DNR and the Iowa Air Emissions Assistance Program (IAEAP) at the University of Northern Iowa are assisting affected facilities with the 7D rule and related air construction permitting requirements. For questions or to receive compliance assistance, see the resources provided below, or contact Michael Hermsen by phone at 515-725-9577 or by email at Michael.Hermsen@dnr.iowa.gov.
7D Rule Information
Permitting Instructions and Guidance
A facility owner or operator is not eligible to use the small unit exemption (SUE) (567 IAC subrule 22.1(2)”w”) if an emission unit emits a hazardous air pollutants and is “required to be reviewed for compliance” with a National Emission Standard for Hazardous Air Pollutants (NESHAP). This DNR guidance document helps explain this requirement, and includes several examples of equipment that can still use the SUE, and some equipment that may no longer qualify for the SUE because of NESHAP requirements.
Small businesses can obtain help with the area source NESHAPS through the Iowa Air Emissions Assistance Program. More information regarding this program, including the eligibility requirements, can be found on the Small Business Assistance website.