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EPA/AR

RIN: 2060-AK27

Publication ID: Spring 2003

Title: Control of Emissions of Air Pollution From Nonroad Diesel Engines and Fuel
Abstract: On October 23, 1998, EPA finalized emission standards for nonroad compression ignition (i.e., diesel) engines for engines over 37 kW(50hp). The regulation reduced the NOx + HC emissions standard by 30 percent to 37 percent (based on the power class) from the previous 6.9 g/hp-hr NOx and 1.0 g/hp-hr HC standard beginning in 1999. As a follow-up to that 1998 rulemaking, the Agency is now undertaking a technology review, pursuant to the Clean Air Act, to assess whether more stringent standards are now feasible, and to promulgate such standards if the findings are positive. The technology review will reassess the NOx + HC standards and will set the next phase of particulate matter standards for over 37 kW and up to 560 kW. The emission limits will also be reexamined for the under 37 kW scheduled for implementation in 2004. The issue of the sulfur content of nonroad diesel fuel will be raised and consideration given to lowering the fuel sulfur level with an ultimate 15 ppm cap. The certification duty cycle for this class of engines will also be revisited to implement a transient duty cycle that gives some assurance of better in-use control of particulate matter.
Agency: Environmental Protection Agency(EPA)	Priority: Economically Significant
RIN Status: Previously published in the Unified Agenda	Agenda Stage of Rulemaking: Proposed Rule Stage
Major: Yes	Unfunded Mandates: Private Sector
CFR Citation: 40 CFR 89
Legal Authority: 15 USC 2002

Legal Deadline: None

Statement of Need: Ozone and particulate pollution pose a serious threat to the health and well-being of millions of Americans and a large burden to the U.S. economy. This rulemaking will address additional national control measures to reduce emissions, including emissions of nitrogen oxides, hydrocarbons, and particulate matter, from nonroad heavy-duty diesel engines, and will also require reduced sulfur levels in nonroad diesel fuel, in order to protect the public health and welfare.

Summary of the Legal Basis: CAA Title II Part A Sec. 213, 217

Alternatives: The proposal discusses in detail a number of alternative control options addressing variations in program timing, level of the standards, and fuel control requirements for a variety of different engine horsepower categories and diesel fuel pools. The large number of possible combinations precludes a brief characterization of the alternatives and their costs and benefits; this information is extensively provided in tabular form in the proposal preamble.

Anticipated Costs and Benefits: The proposal estimates approximately $81 billion annually in quantifiable benefits once the program is fully phased in (in 2030). Corresponding annual cost is approximately $1.5 billion.

Risks: The risks addressed by this program are primarily those associated with nonattainment of the National Ambient Air Quality Standards for ozone and particulate matter. There are also serious public health and environmental problems associated with toxic air pollution, acid rain, reduced visibility and nitrogen loading of estuaries.

Timetable:

Action	Date	FR Cite
NPRM	05/00/2003

Additional Information: SAN No. 4675
Regulatory Flexibility Analysis Required: Yes	Government Levels Affected: Federal, Local, State
Small Entities Affected: Businesses	Federalism: No
Included in the Regulatory Plan: Yes
Agency Contact: Cleophas Jackson Environmental Protection Agency Air and Radiation 1200 Pennsylvania Avenue NW., Washington, DC 20460 Phone:734 214-4824 Email: jackson.cleophas@epamail.epa.gov William Charmley Environmental Protection Agency Air and Radiation ASD, Ann Arbor, MI 48105 Phone:734 214-4466 Fax:734 214-4050 Email: Charmley.William@epamail.epa.gov