RICE Rule (4Z)

Reciprocating Internal Combustion Engine Rules

Several regulations have expanded the number and type of stationary reciprocating internal combustion engines (RICE) that must comply with federal requirements. These include:

National Emissions Standards for Hazardous Air Pollutants (RICE NESHAP)

RICE NESHAP (40 CFR Part 63 Subpart ZZZZ) applies to all existing, new and reconstructed stationary reciprocating internal combustion engines at major and area sources of hazardous air pollutants. The intention of the RICE NESHAP is to reduce emissions of hazardous air pollutants that collectively can have a significant impact on air quality and public health. The primary hazardous air pollutants being emitted from stationary engines include formaldehyde, acrolein, acetaldehyde and methanol.

New Source Performance Standard Subpart IIII (NSPS 4I)
New Source Performance Standard Subpart JJJJ (NSPS 4J)

Standards of Performance for Stationary Compression Ignition (40 CFR Part 60 Subpart IIII) and Spark Ignition (40 CFR 60 Subpart JJJJ) Internal Combustion Engines. The focus of the NSPS requirements is to limit the emissions of criteria air pollutants such as carbon monoxide (CO), nitrogen oxides (NOx), volatile organic compounds (VOCs) and particulate matter (PM).

DAQ Permit Conditions and Regulatory Guides
The Division of Air Quality has developed specific permit conditions and regulatory guides to assist North Carolina facilities in understanding their compliance obligations with respect to emission standards, compliance monitoring, record keeping and reporting requirements contained in the rules. The regulatory guides are intended for Title V and non-Title V facilities that are operating an air emission source(s) that is subject to the RICE NESHAP, NSPS IIII, or NSPS JJJJ. The source could be listed on the permit or exempted from permitting requirements (i.e., listed on the "Insignificant / Exempt Activities" table attached to the air permit).

To view the permit conditions and regulatory guides go to:

EPA Information and Guidance
EPA has developed several tools to help you understand the requirements for demonstrating compliance with the federal standard(s).

Federal Standard Subpart Applicability
National Emissions Standard for Hazardous Air Pollutants, Reciprocating Internal Combustion Engines. NESHAP ZZZZ Applies to stationary new and existing emergency and non-emergency engines.
New Source Performance Standard for stationary compression ignition internal combustion engines. NSPS IIII Applies to new stationary Compression Ignition
engines. Diesel fueled engines are an example of a CI engine.
New Source Performance Standard for
stationary spark ignition internal combustion engines.
NSPS JJJJ Applies to new stationary Spark Ignition engines. Includes engines fueled by natural gas, LPG, gasoline, LFG, and digester gas.

Semi-Annual Report Template
The DAQ has developed a template for semi-annual compliance reports. The template can be used for compliance reports as required at item 1 of Table 7 of NESHAP Subpart ZZZZ.

RICE Data Survey Form
North Carolina Division of Air Quality (DAQ) developed a survey form to assist in determining what information is needed about your facility and engine in order to evaluate the RICE NESHAP compliance requirements. Please complete the survey form and contact the appropriate DAQ Regional Office(s) for assistance with determining the RICE NESHAP compliance requirements.

Regional Office Contacts Telephone
Asheville Brendan.Davey@ncdenr.gov 828-296-4500
Fayetteville Heather.Carter@ncdenr.gov 910-433-3363
Mooresville Joe.Foutz@ncdenr.gov 704-235-2225
Raleigh Dena.Pittman@ncdenr.gov 919-791-4200
Washington Betsy.Huddleston@ncdenr.gov 252-948-3836
Wilmington Dean.Carroll@ncdenr.gov 910-796-7242
Winston-Salem Blair.Palmer@ncdenr.gov 336-776-9645