[Federal Register Volume 60, Number 43 (Monday, March 6, 1995)]
[Proposed Rules]
[Pages 12185-12186]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-5405]



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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 85

[FRL-5164-7]


Retrofit/Rebuild Requirements for 1993 and Earlier Model Year 
Urban Buses; Public Review of a Notification of Intent To Certify 
Equipment

AGENCY: Environmental Protection Agency.

ACTION: Notice of agency receipt of a notification of intent to certify 
equipment and initiation of 45 day public review and comment period.

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SUMMARY: The Agency has received a notification of intent to certify 
urban bus retrofit/rebuild equipment pursuant to 40 CFR part 85, 
Subpart O. Pursuant to Sec. 85.1407(a)(7), today's Federal Register 
notice summarizes the notification below, announces that the 
notification is available for public review and comment, and initiates 
a 45-day period during which comments can be submitted. The Agency will 
review this notification of intent to certify, as well as comments 
received, to determine whether the equipment described in the 
notification of intent to certify should be certified. If certified, 
the equipment can be used by urban bus operators to reduce the 
particulate matter of urban bus engines.

DATES: Comments must be submitted on or before April 20, 1995.

ADDRESSES: Submit separate copies of comments to each of the two 
following addresses:

1. U.S. Environmental Protection Agency, Public Docket A-93-42 
(Category V), Room M-1500, 401 M Street SW., Washington, DC 20460.
2. Anthony Erb, Technical Support Branch, Manufacturers Operations 
Division (6405J), 401 M Street SW., Washington, DC 20460.
    This Engelhard notification of intent to certify, as well as other 
materials specifically relevant to it, are contained in the public 
docket indicated above. Docket items may be inspected from 8:00 a.m. 
until 5:30 p.m., Monday through Friday. As provided in 40 CFR part 2, a 
reasonable fee may be charged by the Agency for copying docket 
materials.

FOR FURTHER INFORMATION CONTACT: Anthony Erb, Manufacturers Operations 
Division (6405J), U.S. Environmental Protection Agency, 401 M Street 
SW., Washington, DC 20460. Telephone: (202) 233-9259.

SUPPLEMENTARY INFORMATION:

I. Background

    On April 21, 1993, the Agency published final Retrofit/Rebuild 
Requirements for 1993 and Earlier Model Year Urban Buses (58 FR 21359). 
The retrofit/rebuild requirements are intended to reduce the ambient 
levels of particulate matter (PM) in urban areas and are limited to 
1993 and earlier model year (MY) urban buses operating in metropolitan 
areas with 1980 populations of 750,000 or more, whose engines are 
rebuilt or replaced after January 1, 1995. Operators of the affected 
buses are required to choose between two compliance programs: Program 1 
sets particulate matter emissions requirements for each urban bus 
engine in an operator's fleet which is rebuilt or replaced; Program 2 
is a fleet averaging program that sets out a specific annual target 
level for average PM emissions from urban buses in an operator's fleet.
    A key aspect of this regulation is the certification of retrofit/
rebuild [[Page 12186]] equipment. To comply with either of the two 
compliance programs, operators of the affected buses must use equipment 
which has been certified by the Agency.
    Emissions requirements under either of the two programs depend on 
the availability of retrofit/rebuild equipment certified for each 
engine model. Engelhard has requested that this application be 
considered under Program 2 only. Therefore, certification of this 
equipment will not trigger any requirements under Program 1. Equipment 
certified for Program 2 must provide some level of PM reduction that 
can in turn be claimed by urban bus operators when calculating their 
average fleet PM levels attained under the program.

II. Notification of Intent To Certify

    By a notification of intent to certify dated October 24, 1994, 
Engelhard Corporation has applied for certification of equipment 
applicable to certain petroleum-fueled diesel engines, DDC 6V92TA MUI 
engines, used in urban buses of 1989 and earlier model years. The 
notification of intent to certify states that the candidate equipment 
will be certified at a maximum particulate matter (PM) emission level 
of 0.25 g/bhp-hr. Since this application is being submitted only under 
Program 2, and life cycle cost data is not required, certification will 
permit the use of this retrofit/rebuild equipment but will not 
specifically require its usage; nor will certification lead to more 
stringent emission standards for operators of fleets using the engines 
affected. The use of the equipment by transit operators to meet Program 
2 requirements is discussed further below.
    Major components of the candidate equipment are: (1) A muffler 
containing an oxidation catalyst, which takes the place of the original 
exhaust system muffler; (2) and a rebuild kit which incorporates a 
ceramic in-cylinder coating. The notification of intent to certify 
states that the candidate equipment is applicable to the following 
engines:

------------------------------------------------------------------------
         Manufacturer                  Engine model          Model years
------------------------------------------------------------------------
DDC..........................  6V92TA MUI..................    1979-1989
------------------------------------------------------------------------

    Engelhard presents exhaust emission data from testing the equipment 
on a recently rebuilt 1985 model year DDC 6V92TA MUI engine documenting 
PM emissions using the heavy-duty engine Federal Test Procedure. The PM 
emissions from this test equalled 0.22 g/bhp-hr. Exhaust testing with 
the equipment installed also showed that hydrocarbon (HC), carbon 
monoxide (CO), and oxides of nitrogen (NOx), emissions were less than 
the federal emission standards for 1987. Smoke emission measurements 
for the engine with the candidate equipment installed indicate 
compliance with applicable standards.
    Engelhard has requested certification only under Program 2. 
Engelhard is applying for certification to a post rebuild PM level of 
0.25 g/bhp-hr with the equipment installed on the DDC 6V92TA MUI 
engine. If the Agency approves Engelhard's request to certify this 
candidate equipment, urban bus operators who choose to comply with 
Program 2 of the urban bus regulation may use this equipment, but it 
would not be specifically required. If this equipment is certified, 
operators under Program 2 using this equipment will use the PM emission 
level(s) established during the certification review process, in the 
calculations for fleet level attained (FLA).
    At a minimum, EPA expects to evaluate this notification of intent 
to certify, and other materials submitted as applicable, to determine 
whether there is adequate demonstration of compliance with: (1) The 
certification requirements of Sec. 85.1406, including whether the 
testing accurately substantiates the claimed emission reduction or 
emission levels; and, (2) the requirements of Sec. 85.1407 for a 
notification of intent to certify.
    The Agency requests that those commenting also consider these 
regulatory requirements, plus provide comments on any experience or 
knowledge concerning: (a) Problems with installing, maintaining, and/or 
using the candidate equipment on applicable engines; and, (b) whether 
the equipment is compatible with affected vehicles.
    The date of this notice initiates a 45 day period during which the 
Agency will accept written comments relevant to whether or not the 
equipment described in the Engelhard notification of intent to certify 
should be certified pursuant to the urban bus retrofit/rebuild program. 
Interested parties are encouraged to review the notification of intent 
to certify and provide comments during the 45 day period. Please send 
separate copies of your comments to each of the above addresses.
    The Agency will review this notification of intent to certify, 
along with comments received from interested parties, and attempt to 
resolve or clarify issues as necessary. During the review process, the 
Agency may add additional documents to the docket as a result of the 
review process. These documents will also be available for public 
review and comment within the 45 day period.

Richard Wilson,
Acting Assistant Administrator for Air and Radiation.
[FR Doc. 95-5405 Filed 3-3-95; 8:45 am]
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