federal_register: E8-4388
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| document_number | title | type | abstract | publication_date | pub_year | pub_month | html_url | pdf_url | agency_names | agency_ids | excerpts |
|---|---|---|---|---|---|---|---|---|---|---|---|
| E8-4388 | In-Use Testing for Heavy-Duty Diesel Engines and Vehicles; Emission Measurement Accuracy Margins for Portable Emission Measurement Systems and Program Revisions | Rule | In a rule published on June 14, 2005, EPA established a manufacturer-run, in-use testing program for heavy-duty diesel vehicles. The program requires engine manufacturers to measure exhaust emissions from their diesel engines using portable emissions measurement systems during real-world operation. At the time the rule was promulgated, EPA established interim emission measurement "accuracy" margins for the requisite portable emission measurement devices pending the development of final accuracy margins through a comprehensive research program. This Direct Final Rule adopts the resulting final accuracy margins for gaseous pollutants. Also, this rule makes several changes to the program in the early years of in-use testing. First, we are eliminating the first calendar year, i.e., 2006, of the two-year pilot program for particulate emissions (PM) in response to engine manufacturers' concerns, which primarily relate to the availability and efficacy of the requisite portable measurement systems (PEMS) for that pollutant. Second, due to a delay in developing the final accuracy margin for PM under the aforementioned comprehensive research program, we are delaying the first year of the fully enforceable PM test program from the 2008 calendar year to the 2009 calendar year. During the 2008 calendar year, there will be another year of pilot program testing for that pollutant. Third, and finally, we are extending the normal period for reporting in-use test results during the initial years of the program and allowing certain short-term changes in how vehicles are recruited and tested. These revisions are primarily intended to address delays in initiating the gaseous emission and PM pilot programs, manufacuturers' concerns regarding the schedule for initial purchases of PM measurement systems, and manufacturers' concerns regarding potential difficulties of initially instrumenting vehicles with these units. | 2008-03-13 | 2008 | 3 | https://www.federalregister.gov/documents/2008/03/13/E8-4388/in-use-testing-for-heavy-duty-diesel-engines-and-vehicles-emission-measurement-accuracy-margins-for | https://www.govinfo.gov/content/pkg/FR-2008-03-13/pdf/E8-4388.pdf | Environmental Protection Agency | 145 | In a rule published on June 14, 2005, EPA established a manufacturer-run, in-use testing program for heavy-duty diesel vehicles. The program requires engine manufacturers to measure exhaust emissions from their diesel engines using portable emissions... |