Proposed Rule and Correction for Control of Air Pollution From New Motor Vehicles: In-Use Testing for Heavy-Duty Diesel Engines and Vehicles
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The U.S. Environmental Protection Agency (EPA) is proposing a manufacturer-run, in-use emissions testing program for heavy-duty diesel trucks. This proposal is the first step in implementing a June 2003 settlement agreement between the Engine Manufacturers Association (EMA) and EPA. Under this in-use testing program, manufacturers will measure gaseous and particulate exhaust emissions from diesel engines using portable onboard emission measurement systems. This cooperative effort represents a significant advance in helping to ensure that the benefits of more stringent emission standards are realized under real-world driving conditions.
- Proposed Rule Correction (PDF)(10 pp, 230 K, published June 21, 2004)
- Proposed Rule (PDF)(20 pp, 180 K, June 10, 2004)
- Draft Technical Support Document (PDF)(55 pp, 623 K, EPA-420-D-04-003, June 2004)
- Fact Sheet: Proposed In-Use Testing Program for Heavy-Duty Diesel Engines and Vehicles (PDF)(4 pp, 117 K, EPA-420-F-04-042, June 2004)