[Federal Register Volume 66, Number 224 (Tuesday, November 20, 2001)]
[Proposed Rules]
[Page 58085]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 01-28856]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 89

[AMS-FRL-7104-9 ]


Nonroad Diesel Emissions Standards Staff Technical Paper

AGENCY: Environmental Protection Agency (EPA).

ACTION: Availability of Staff Technical Paper.

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SUMMARY: When we set the Tier 3 emission standards in 1998, available 
information indicated that the cooled exhaust gas recirculation (EGR) 
technology developed for highway diesel engines would be the primary 
means of compliance with these standards. In conducting our technology 
review, we have surveyed the recent engineering and scientific 
literature on advances in diesel emissions control. We have also 
reviewed information provided by engine manufacturers in support of our 
2004 highway standards program, showing the considerable progress they 
have made in the design of robust EGR systems for use in highway 
engines. In addition, we have gathered information from engine 
manufacturers on their design plans for Tier 3 and their testing and 
development experience with control technologies they are likely to 
employ. This information shows that cooled EGR is but one of several 
technologies available to diesel engine manufacturers to meet the Tier 
3 emission standards. This widening of technology options comes from 
the progress of development since 1998, but is also due to the fact 
that the 1998 final rule envisioned a Tier 3 program more closely 
aligned with future highway standards, in particular including 
comparable control of particulate matter (PM), rather than the less 
demanding set of Tier 3 standards that were actually adopted at the 
time, and that are the subject of this feasibility assessment. Based on 
the information we have gathered, we believe that the Tier 3 standards 
in the regulations on control of emissions from new and in-use nonroad 
compression-ignition engines are feasible in the timeframe established 
in the rule. We also believe that the Tier 2 standards for engines 
under 50 horsepower are likewise feasible, based on certification test 
data from Tier 1 engines in this power range showing that many of these 
engines are already meeting the Tier 2 standards. Additionally we 
stated that as a part of the 2001 Technology Review process, PM 
standards would be addressed. Given the need for further PM reductions, 
those will be addressed in a subsequent regulatory action.

DATES: EPA is requesting public review and comment on the Staff 
Technical Paper on or before January 4, 2002.

ADDRESSES: You may send written comments (in duplicate if possible) to 
Margaret Borushko, U.S. EPA, National Vehicle and Fuels Emission 
Laboratory, 2000 Traverwood, Ann Arbor, MI 48105. The Staff Technical 
Paper and supporting documents are available in the public docket A-
2001-28. The docket is located at U.S. Environmental Protection Agency, 
401 M St., SW, Room 1500, Washington, DC 20460 (on the ground floor in 
Waterside Mall) and is open from 8 a.m. to 5:30 p.m., Monday through 
Friday, except on government holidays. You can reach the docket office 
by telephone at (202) 260-7548 and by facsimile at (202) 260-4400. We 
may charge a reasonable fee for copying docket materials, as provided 
in 40 CFR part 2.

FOR FURTHER INFORMATION CONTACT: Margaret Borushko, U.S. EPA, National 
Vehicle and Fuels Emission Laboratory, 2000 Traverwood, Ann Arbor, MI 
48105; Telephone (734) 214-4334; FAX: (734) 214-4816; E-mail: 
[email protected]. EPA comments hotline: 734-214-4370.

SUPPLEMENTARY INFORMATION: The Nonroad Diesel Emissions Standards Staff 
Technical Paper is available at the url: http://www.epa.gov/otaq/equip-hd.htm starting October 30, 2001. This serves as the Notice of 
Availability. The document discusses nonroad diesel engine technology 
for heavy duty applications, as well as the under 37 kW (50 hp) nonroad 
diesel engines within the context of the 2001 Nonroad Diesel Technology 
Review.
    Readers should also note a new telephone number that will serve as 
a hotline for updated information related to the public comment period. 
People should call 734-214-4370.

Access to Technical Documents Through the Internet

    Today's action is available electronically on the day of 
publication from the Office of the Federal Register Internet Web site 
listed below. Electronic copies of this technical staff paper and other 
documents associated with today's action are available from the EPA 
Office of Transportation and Air Quality Web site listed below. This 
service is free of charge, except any cost that you already incur for 
connecting to the Internet.

EPA Federal Register Web Site: http://www.epa.gov/docs/fedrgstr/epa-air/ (Either select a desired date or use the Search feature.)
Nonroad Diesel home page: http://www.epa.gov/otaq/equip-hd.htm

    Please note that due to differences between the software used to 
develop the document and the software into which the document may be 
downloaded, changes in format, page length, etc., may occur.

    Dated: November 9, 2001.
Robert Brenner,
Acting Assistant Administrator, Office of Air and Radiation.
[FR Doc. 01-28856 Filed 11-19-01; 8:45 am]
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