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arbcombo -- PUBLIC WORKSHOP TO DISCUSS POTENTIAL CHANGES TO THE HEAVY-DUTY ENGINE EMISSION STANDARDS, WARRANTY, AND RELATED HEAVY-DUTY PROGRAMS
Posted: 05 Oct 2016 15:41:49
The California Air Resources Board (ARB or Board) staff invites you to participate in a public workshop on November 3, 2016, to discuss planned measures to reduce oxides of nitrogen (NOx) emissions from on-road heavy-duty vehicles. At this workshop, staff will be soliciting input on proposals to revise: • The heavy-duty engine NOx standards including a low load certification cycle; • The Not-to-Exceed in-use compliance program; • The useful life and durability requirements in certification; • Not to Exceed (NTE) In-Use Compliance Program; • Warranty period requirement; and • Emission Warranty Information Reporting The workshop is described further in the workshop notice at https://www.arb.ca.gov/msprog/mailouts/msc1610/msc1610.pdf and will be held at the following time and location: Date: Thursday, November 3, 2016 Time: 1:00 p.m. – 5:00 p.m. Location:South Coast Air Quality Management District, Auditorium 21865 Copley Drive Diamond Bar, California 91765 Directions are at http://tinyurl.com/ja4mxgk Background: A key measure described in ARB’s Mobile Source Strategy document is the establishment of national low-NOx emission standards that reflect up to a 90 percent reduction in NOx emissions compared to the current emission standards. This measure is critical for attaining federal health-based air quality standards for ozone in 2023 and 2031 in the South Coast and San Joaquin Valley air basins, as well as fine particulate matter standards in the next decade. A proposal for new low- NOx emission standards, associated revisions to the certification test cycle to account for low load urban driving conditions, and other potential revisions to account for real world emissions, is tentatively scheduled for Board consideration in 2019. In addition to lower NOx standards, other elements are being considered in an effort to improve the in-use performance of heavy-duty vehicles. Specifically, these elements are listed below followed by a more detailed discussion of each: • Amendments to warranty provisions. • Amendments to the NTE supplemental test procedures. • Amendments to the certification durability demonstration and useful life provisions. ARB is considering lengthening the required warranty period for heavy-duty vehicle emission control systems primarily because the warranty period does not reflect the real world longevity of heavy-duty vehicles. Class 8 vehicles frequently operate upwards of a million miles before major overhaul is needed, but they are required to be warranted for only 100,000 miles under ARB and U.S. EPA regulations. Classes 4 through 7 vehicles also have relatively short warranty periods. With longer required warranty periods, manufacturers would need to design more durable emission control systems and components. In addition to lengthening the warranty period, ARB also intends to strengthen and enhance the current Emission Warranty and Information Reporting requirements to more readily enact corrective action on the part of the manufacturer, based upon warranty rates. A proposal to revise both the warranty period and the warranty rates/corrective action requirements for heavy-duty vehicles is scheduled to be heard by the Board in December 2017. The NTE in-use compliance program is currently the primary method used for ensuring in-use compliance with the heavy-duty engine emission standards. The NTE testing requirements were first introduced as part of the 1998 Consent Decrees with U.S. EPA, ARB, and heavy-duty engine manufacturers. Manufacturers have to demonstrate compliance within the NTE control area of the engine map by measuring emissions using Portable Emissions Measurement Systems. However, the NTE control area includes a number of conditions that exclude regions in the engine map associated with low load operation, including the region below 30 percent maximum torque and/or 30 percent maximum power. Engine operations within the NTE control area for fewer than 30 consecutive seconds and engine operations that result in exhaust aftertreatment temperatures below 250 degrees Celsius are also excluded from the NTE analysis. Because of these current limitations, the current in-use compliance program is not adequate for ensuring that emissions are controlled during the majority of in-use operations, including low load conditions. ARB is currently considering modifying the testing protocol in order to effectively assess in-use compliance under essentially all driving conditions. ARB is also considering revising the durability demonstration provisions within the certification requirements for heavy-duty engines. The durability demonstration program requires manufacturers to demonstrate compliance with emission standards over the useful life of the engine. ARB staff are concerned that the current durability demonstration program does not accurately represent the in-use deterioration of aftertreatment emission control systems. Furthermore, the useful life over which compliance with the durability provisions is demonstrated is significantly lower than the full life or mileage before first rebuild, resulting in excess emissions due to deteriorated engines and components. Therefore, ARB is considering revising the useful life period as well, resulting in the need to revise the durability demonstration process to account for a longer useful life. Revisions to the NTE in-use compliance program, durability demonstration provisions, and the useful life period are all scheduled to be heard by the Board at the same time as the proposal for new low-NOx emission standards (i.e., 2019). Special Accommodation: If you require a special accommodation or need this document in an alternate format (i.e., Braille, large print), please visit http://www.arb.ca.gov/html/ada/ada.htm for assistance or contact the Americans with Disabilities Act Coordinator by telephone at(916) 323-4916 no later than 10 business days before the scheduled meeting. If you are a person who needs assistance in a language other than English, please visit www.arb.ca.gov/eeo/bilingual-services.htm or contact the Bilingual Coordinator by telephone at (916) 322-0473 no later than 10 business days before the scheduled meeting. TTY/TDD/Speech to Speech users may dial 711 for the California Relay Service. Consecuente con la sección 7296.2 del Código de Gobierno de California, una acomodación especial o necesidades lingüísticas pueden ser suministradas para cualquiera de los siguientes:• Un intérprete que esté disponible en la audiencia;• Documentos disponibles en un formato alterno u otro idioma;• Una acomodación razonable relacionados con una incapacidad. Para solicitar estas comodidades especiales o necesidades de otro idioma, por favor llame a la oficina del Consejo al (916) 324-0342 o envié un fax a (916) 327-8524 lo más pronto posible, pero no menos de 10 días de trabajo antes del día programado para la audiencia del Consejo. TTY/TDD/Personas que necesiten este servicio pueden marcar el 711 para el Servicio de Retransmisión de Mensajes de California For questions regarding the workshop, you may contact Mr.Daniel Hawelti, by email at daniel.hawelti@arb.ca.gov or by phone at (626) 450-6149. California is in a drought emergency. Visit www.SaveOurH2O.org for water conservation tips. 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