[Federal Register Volume 60, Number 119 (Wednesday, June 21, 1995)]
[Notices]
[Pages 32316-32318]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-15216]



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ENVIRONMENTAL PROTECTION AGENCY
[FRL-5221-3]


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 from the Cummins Engine Company, Inc. (Cummins). 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.
    The Cummins notification of intent to certify, as well as other 
materials specifically relevant to it, is contained in category VIII-A 
of Public Docket A-93-42, entitled ``Certification of Urban Bus 
Retrofit/Rebuild Equipment.'' This docket is at the address below.
    Today's notice initiates a 45-day period during which the Agency 
will accept written comments relevant to whether or not the equipment 
included in this notification of intent to certify should be certified. 
Comments should be provided in writing to Public Docket A-93-42, 
Category VIII-A, at the address below. An identical copy should be 
submitted to Anthony Erb, also at the address below.

DATES: Comments must be submitted on or before August 7, 1995.

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

1. U.S. Environmental Protection Agency, Public Docket A-93-42 
(Category VIII-A), Room M-1500, 401 M Street SW., Washington, D.C. 
20460.
2. Anthony Erb, Technical Support Branch, Manufacturers Operations 
Division (6405J), 401 ``M'' Street SW., Washington, D.C. 20460.

    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, D.C. 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 program is intended to reduce the ambient levels 
of [[Page 32317]] particulate matter (PM) in urban areas and is 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 one sets particulate matter emissions requirements for each 
urban bus engine in an operator's fleet which is rebuilt or replaced; 
Program two is a fleet averaging program that establishes specific 
annual target levels for average PM emissions from urban buses in an 
operator's fleet.
    Certification of retrofit/rebuild equipment is a key element of the 
retrofit/rebuild. To show compliance under either of the compliance 
programs, operators of the affected buses must use equipment that has 
been certified by the Agency. Emissions requirements under either of 
the two compliance programs depend on the availability of certified 
retrofit/rebuild equipment for each engine model. To be used for 
Program one, equipment must be certified as meeting a 0.10 g/bhp-hr PM 
standard or as achieving a 25 percent reduction in PM. Equipment used 
for Program two must be certified as providing some level of PM 
reduction that would in turn be claimed by urban bus operators when 
calculating their average fleet PM levels attained under the program. 
For Program one, information on life cycle costs must be submitted in 
the notification of intent to certify in order for certification of the 
equipment to initiate (or trigger) program requirements. To trigger 
program requirements, the certifier must guarantee that the equipment 
will be available to all affected operators for a life cycle cost of 
$7,940 or less at the 0.10 g/bhp-hr PM level, or for a life cycle cost 
of $2,000 or less for the 25 percent or greater reduction in PM. Both 
of these values are based on 1992 dollars.

II. Notification of Intent To Certify

    By a notification of intent to certify signed March 13, 1995, 
Cummins has applied for certification of equipment applicable to its 
LTA10-B model engines that were originally manufactured between 
November 1985 and December 1992. The pending equipment certification is 
applicable to the following configurations:

------------------------------------------------------------------------
                                          Control   Manufacture dates\1\
                                           parts   ---------------------
                 Family                     list                        
                                           (CPL)      Start       End   
------------------------------------------------------------------------
343B...................................       0780   11/20/85   12/31/87
                                              0781   11/20/85   12/31/87
343C...................................       0774   11/20/85   12/31/89
                                              0777   11/20/85   12/31/89
                                              0996   12/04/87   08/19/88
                                              1226   07/26/88   12/31/90
343F...................................       1226   07/12/90   08/26/92
                                              1441   12/18/90   12/31/92
                                              1622   04/24/92   12/31/92
                                              1624   04/24/92   12/31/92
------------------------------------------------------------------------
\1\Equipment certification will be applicable to those engines          
  originally built between the start and end dates for the appropriate  
  configuration.                                                        

    Two separate horsepower/torque ratings are to apply for each CPL 
listed, either 240 horsepower and 750 foot-pounds of torque or 270 
horsepower and 860 foot-pounds of torque. The notification of intent to 
certify states that the candidate equipment will reduce PM emissions 25 
percent or more, on petroleum-fueled diesel engines that have been 
rebuilt to Cummins specifications. Pricing information has been 
submitted with the notification, along with a guarantee that the 
equipment will be offered to all affected operators for less than the 
incremental life cycle cost ceiling. Therefore, this equipment may 
trigger program requirements for the 25% reduction standard. If 
certified as a trigger of this standard, urban bus operators will be 
required to use this retrofit/rebuild equipment or other equipment 
certified to provide a PM reduction as discussed below.

    All components of the candidate equipment are contained in 
combination of two kits. The first kit is common to both horsepower/
torque ratings and consists of a camshaft, cam key, cylinder kits, and 
a fuel plumbing kit. The second kit contains the injectors, cylinder 
head, turbocharger and fuel pump and is ordered based on the 
horsepower/torque rating that is wanted. The first kit in combination 
with one of the second kits is required to rebuild an engine.

    Cummins presents exhaust emission data from testing a new engine 
that was selected directly from the assembly and built to a 
configuration to which all rebuilt engines that are included under this 
certification will be made identical. Two tests were conducted, one 
test was performed on the engine with the 240/750 (horsepower/torque) 
rating and a second test was conducted on the same engine after 
retrofit with the components needed to achieve the 270/860 rating. The 
test data show a PM level of 0.28 g/bhp-hr for the 240/750 rating and a 
PM level of 0.24 g/bhp-hr for the 270/860 rating with the candidate 
equipment installed.

    Cummins has also provided new engine certification and other 
emissions data providing the baseline PM level for each engine 
configuration. The test data show that with candidate equipment 
installed, PM is reduced between 38% and 61% depending upon the engine 
and rating being compared. The test data also show that hydrocarbon 
(HC), carbon monoxide (CO), and oxides of nitrogen (NOX) are less 
than applicable standards. Fuel consumption is not affected when the 
candidate equipment is installed according to Cummins. Cummins presents 
smoke emission measurements for the engine demonstrating compliance 
with applicable standards.

    Cummins indicates that the candidate equipment will have an 
incremental fleet purchase price increase over the standard rebuild of 
$1435.29 due to the increased cost for the components. Cummins states 
that there will be no incremental installation cost, fuel cost, or 
maintenance cost compared to the currently available standard rebuild. 
Therefore, the candidate equipment will be offered to all affected 
operators for less than a life cycle cost of $2,000 (1992 dollars). 
This information may trigger the 25 percent reduction standard if the 
equipment is certified.

    If the Agency certifies the candidate Cummins equipment as a 
trigger of program requirements, operators will be affected as follows. 
Under Program 1, all rebuilds of applicable engines performed six 
months following the effective date of certification, must use the 
Cummins equipment or other equipment certified to provide at least a 25 
percent reduction. This requirement would continue for the applicable 
engines until such time that equipment was certified to trigger the 
0.10 g/bhp-hr emission standard for less than a life cycle cost of 
$7,940 (in 1992 dollars). If the Agency certifies the candidate Cummins 
equipment as a trigger of program requirements, operators who choose to 
comply with Program 2 and install this equipment, will use the PM 
emission level(s) established during the certification review process, 
in their calculations for target or fleet level as specified in the 
program regulations.

    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 proves the claimed emission reduction or 
[[Page 32318]] emission levels; and, (2) the requirements of 
Sec. 85.1407 for a notification of intent to certify, including whether 
the data provided by Cummins complies with the life cycle cost 
requirements.
    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 Cummins notification of intent to certify 
should be certified pursuant to the urban bus retrofit/rebuild 
regulations. Interested parties are encouraged to review the 
notification of intent to certify and provide comment during the 45-day 
period. Please send separate copies of your comments to each of the 
above two 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 D. Wilson,
Acting Assistant Administrator for Air and Radiation.
[FR Doc. 95-15216 Filed 6-20-95; 8:45 am]
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