Retrofit/Rebuild Requirements for 1993 and Earlier Model Year Urban Buses; Approval of an Application for Certification of Equipment

ENVIRONMENTAL PROTECTION AGENCY

[FRL-5294-3]

Retrofit/Rebuild Requirements for 1993 and Earlier Model Year

Urban Buses; Approval of an Application for Certification of Equipment

AGENCY: Environmental Protection Agency.

ACTION: Notice of agency approval of an application for equipment

certification.

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SUMMARY: The Agency received an application dated October 24, 1994 from

the Engelhard Corporation (Engelhard) with principal place of business

at 101 Wood Avenue, Iselin, New Jersey for certification of urban bus

retrofit/rebuild equipment pursuant to 40 CFR 85.1401-85.1415. On March

6, 1995 EPA published notification that the application had been

received and made the application available for public review and

comment for a period of 45 days (60 FR 12185). EPA has completed its

review of this application and the Director of the Manufacturers

Operations Division has determined that it meets all the requirements

for certification. Accordingly, EPA approves the certification of this

equipment effective September 11, 1995.

The candidate equipment provides a reduction in emissions of

particulate matter (PM) for Detroit Diesel Corporation 6V92TA

MUI(mechanical unit injection) petroleum fueled diesel engines. The

certification of this equipment is applicable under program 2 only. It

does not apply for operators utilizing Program 1 as Engelhard

specifically applied under Program 2 only and did not perform the

additional testing required for Program 1 certification.

The Engelhard application, as well as other materials specifically

relevant to it, are contained in Public Docket A-93-42, entitled

``Certification of Urban Bus Retrofit/Rebuild Equipment''. This docket

is located in room M-1500, Waterside Mall (Ground Floor), U.S.

Environmental Protection Agency, 401 M Street SW, Washington, DC 20460.

Docket items may be inspected from 8:00 a.m. until 4:00 p.m., Monday

through Friday. As provided in 40 CFR

[[Page 47171]]

Part 2, a reasonable fee may be charged by the Agency for copying

docket materials.

DATES: The date of this notice, September 11, 1995, is the official

certification date for this application. The equipment is immediately

available for installation.

FOR FURTHER INFORMATION CONTACT: Anthony Erb, Technical Support Branch,

Manufacturers Operations Division (6405J), U.S. Environmental

Protection Agency, 401 M St. SW, Washington, D.C. 20460. Telephone:

(202) 233-9259.

SUPPLEMENTARY INFORMATION:

I. Background

On October 24, 1995 Engelhard applied for certification of a kit,

for use on 2-cycle petroleum fueled diesel DDC 6V92TA MUI urban bus

engines for the 1979 through 1989 model years, that includes a

catalytic converter muffler (CCM) and incorporates a ceramic in-

cylinder coating applied to the piston crowns, valve face and fire deck

on the engine head. The application was submitted under EPA's Urban

Bus/Retrofit program under Program 2 only.1

\1\EPA promulgated the Retrofit/Rebuild Requirements for 1993

and Earlier Model Year Urban Buses on April 23, 1993 (58 FR 21359).

This final rule established the provisions for an urban bus

retrofit/rebuild program as required by section 219(d) of the Clean

Air Act Amendments (CAAA) of 1990.

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The CCM functions as a catalytic converter and a muffler. It takes

the place of the original muffler in the engine exhaust system. Through

testing in accordance with the Federal Test Procedure for heavy-duty

diesel engines, Engelhard documented that emissions of particulate

matter (PM) were reduced to a level of 0.22 g/bhp-hr with the candidate

equipment installed. Engelhard is certifying this equipment to a

maximum PM emission level of 0.25g/bhp-hr.

Table A.--Certification Levels

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PM level

with

standard

Engine model Model year rebuild and Code Family

addition of designation

CCM and GPX

coating

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DDC 6V92TA MUI........................................... 1979-1989 0.25 All All.

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Emission test results supplied by Engelhard in the application are

shown in Table B. The test data show the reduction in PM. Hydrocarbon

(HC), carbon monoxide (CO), oxides of nitrogen (NOX) and smoke

emissions were within the applicable emission standards with the CCM

installed.

Table B. Certification Emission Test Results (GM/BHP-HR)

------------------------------------------------------------------------

Rebuilt

engine

Baseline with

engine catalyst

before and GPX-

rebuild 4

coating

------------------------------------------------------------------------

HC.................................................. 1.19 0.23

CO.................................................. 2.53 0.46

NOX................................................. 9.55 5.53

PM.................................................. 0.87 0.22

Smoke Test:

Accel............................................. ........ 6.0%

Lug............................................... ........ 3.4%

Peak.............................................. ........ 7.6%

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Urban bus operators who choose to comply with Program 2 and use the

Engelhard equipment will use the PM emission value from Table A when

calculating their average fleet PM level.

II. Summary and Analysis of Comments

EPA received comments from one party on this Engelhard application

during the comment period. The Greater Bridgeport Transit District

stated that their experience using GPX-4 ceramic coatings since 1991

has been positive. The engines have gotten better fuel economy, emitted

less smoke, and consumed less lubrication oil. A copy of the comments

can be found in EPA Docket A-93-42.

III. Certification Approval

The Agency has reviewed this application, along with comments

received from interested parties, and finds that this equipment reduces

particulate matter emissions without causing urban bus engines to fail

to meet any applicable Federal emission requirements. Additionally, EPA

finds that installation of this equipment will not cause or contribute

to an unreasonable risk to the public health, welfare or safety, or

result in any additional range of parameter adjustability or

accessibility to adjustment than that of the engine manufacturer's

emission related part. The application meets the requirements for

certification under the Retrofit/Rebuild Requirements for 1993 and

Earlier Model Year Urban Buses (40 CFR 85.1401 and 85.1415). Thus, the

Agency hereby approves the certification of this equipment.

IV. Operator Requirements and Responsibilities

For operators who have chosen to comply with Program 2, this

equipment is immediately available for use and those who use this

certified kit may claim the PM emissions reduction as stated in Table A

when calculating their Fleet Level Attained.

As stated in the regulations, operators should maintain records for

each engine in their fleet to demonstrate that they are in compliance

with the requirements beginning in January 1, 1995. These records

include purchase records, receipts, and part numbers for the parts and

components used in the rebuilding of urban bus engines.

Mary D. Nichols,

Assistant Administrator for Air and Radiation.

[FR Doc. 95-22491 Filed 9-8-95; 8:45 am]

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