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Retrofit/Rebuild Requirements for 1993 and Earlier Model Year Urban Buses; Approval of a Notification of Intent To Certify Equipment
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
[Federal Register: July 19, 1996 (Volume 61, Number 140)] [Notices] [Page 37738-37741] From the Federal Register Online via GPO Access [wais.access.gpo.gov]
ENVIRONMENTAL PROTECTION AGENCY [FRL-5540-3] Retrofit/Rebuild Requirements for 1993 and Earlier Model Year Urban Buses; Approval of a Notification of Intent To Certify Equipment AGENCY: Environmental Protection Agency. ACTION: Notice of Agency Certification of Equipment for the Urban Bus Retrofit/Rebuild Program.
SUMMARY: The Agency received a notification of intent to certify equipment signed January 2, 1996, from the Detroit Diesel Corporation (DDC) with principal place of business at 13400 Outer Drive, West; Detroit, Michigan, 48239, for certification of urban bus retrofit/ rebuild equipment pursuant to 40 CFR Sections 85.1401-85.1415. The equipment is applicable to Detroit Diesel Corporation's (DDC) petroleum-fueled 6V92TA model engines having Detroit Diesel Electronic Control (DDEC II) fuel injection. Certification is restricted to 1988 through 1990 model year engines. On April 17, 1996, EPA published a notice in the Federal Register that the notification had been received and made the notification available for public review and comment for a period of 45 days (61 FR 16739). EPA has completed its review of this notification, and the comments received, and the Director of the Engine Programs and Compliance Division has determined that it meets all the requirements for certification. Accordingly, EPA has approved the certification of this equipment effective June 28, 1996. (EPA provided a letter to DDC on this date stating Director of the Engine Programs and Compliance Division had granted certification.) The certified equipment provides 25 percent or greater reduction in exhaust emissions of particulate matter (PM) for the engines for which it is certified (see below), and meets the requirements of the urban bus retrofit/rebuild program for certification. Therefore, as discussed below, this equipment may be used by operators choosing compliance program 2 and operators choosing compliance program 1 unless rebuild equipment is certified to trigger the 0.10 g/bhp-hr standard for these engines under the urban bus retrofit/rebuild program. EPA anticipated reviewing the cost information supplied by DDC to determine whether it complied with the life cycle cost requirements. In general, equipment certified as meeting both the emissions requirements and cost requirements can be considered by EPA when revising the postrebuild PM levels to be used by transit operators choosing to comply with Option 2 (the averaging program). However, equipment has already been certified for these engines as meeting both the emissions requirements and cost requirements of the regulations (i.e. the 25 percent PM reduction standard has already been triggered for these engines). Two current equipment certifications (Engelhard Corporation (60 FR 28402, May 31, 1995), and Johnson Matthey (61 FR 16773, April 17, 1996)) are certified to the same PM level as the DDC equipment certified today. Because the DDC rebuild equipment will not have a lower certification level than the equipment already certified, EPA sees no program benefit for basing certification on the basis of meeting life cycle costs.
The DDC notification, as well as other materials specifically relevant to it, are contained in Public Docket A-93-42, category XII, 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 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. DATES: The effective date of certification is June 28, 1996, which is the date on which the Director of the Engine Programs and Compliance Division notified DDC in writing that certification was approved. FOR FURTHER INFORMATION CONTACT: Tom Stricker, Engine Programs and Compliance Division (6303J), U.S. Environmental Protection Agency, 401 M St. SW., Washington, D.C. 20460. Telephone: (202) 233-9322. SUPPLEMENTARY INFORMATION: I. Background By a notification of intent to certify signed January 2, 1996, Detroit Diesel Corporation (DDC) applied for certification of equipment applicable to its 1988 through 1990 model year 6V92TA model urban bus engines [[Page 37739]] having Detroit Diesel Electronic Control (DDEC II) fuel injection. The equipment to be certified, referred to as an upgrade kit, is basically later model-year components (such as turbocharger, blower, fuel injectors, and cylinder kits) which replace the original parts on the engine.
All parts of the certified equipment are contained in two basic types of kits. One of each basic type of kit is required for the rebuild of an engine. Three combinations of the two basic types of kits are certified--the specific combination to be used with a particular engine depends upon the direction of engine rotation, orientation of the engine block, and engine power level. One basic type of kit includes a gasket kit, cylinder kit, and remanufactured fuel injectors. The other basic type of kit includes remanufactured parts, including camshafts, blower assembly, turbocharger, and cylinder head assemblies. In addition, the kit includes an updated computer program for the engine's computer.
The DDC upgrade kit is intended for use on 1988 through 1990 model year 6V92TA model urban bus engines having Detroit Diesel Electronic Control (DDEC II) fuel injection. The 1988 through 1990 6V92TA DDEC II models were originally manufactured to either a 253 horsepower (hp) configuration or a 277 hp configuration. Use of today's certified upgrade kit will result in a 277 hp engine configuration, regardless of the engine configuration of the original engine. DDC did not attempt to certify the 253 hp version of the 1991 engine configuration. To ensure that transit operators only upgrade their engines to the 277 hp engine configuration, DDC will only provide the computer program (or, as DDC refers to it, the certification word code) for the 1991 model year 277 hp engine configuration.
In accordance with 40 CFR 85.1406, and consistent with the discussion in the preamble to final rule (58 FR 21359, April 23, 1993), DDC based its certification demonstration on existing new engine certification data. The baseline test data are from a 1988 6V92TA DDEC II engine (253 hp) tested in DDC's 1989 new engine certification program. Test data for the upgraded engine configuration are from a 1991 6V92TA DDEC II engine (277 hp), tested in DDC's 1991 new engine certification program. Emission test data supplied by DDC in its notification are shown below in Table A. Table A.--Emission Test Data (g/bhp-hr)
Baseline Upgrade 1988 1991 DDEC II DDEC II (253 hp) (277 hp) Smoke emissions: Certification 8067-7B27 8067-7B28 8067-7B21 8067-7B22 8067-7B23 8067-7B24 8067-4B23 8067-4B25