federal_register: 00-18640
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| document_number | title | type | abstract | publication_date | pub_year | pub_month | html_url | pdf_url | agency_names | agency_ids | excerpts |
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| 00-18640 | Control of Emissions of Hazardous Air Pollutants from Mobile Sources | Proposed Rule | A range of compounds known as hazardous air pollutants are emitted from motor vehicles and fuels and are known or suspected to have serious health impacts. This document describes EPA's program to address emissions of hazardous air pollutants from mobile sources. In this document, we develop a framework to construct a national mobile source air toxics program and propose additional controls on gasoline to prevent increases in emissions of benzene. We also describe a plan to continue to conduct research and analysis on mobile source air toxics and make a commitment to revisit the issue of mobile source air toxics controls in a 2004 rulemaking. More specifically, we look at the various compounds that are emitted by motor vehicles and identify those compounds that should be considered Mobile Source Air Toxics (MSATs). Our list of 21 MSATs includes various volatile organic compounds (VOCs) as well as metal compounds and diesel exhaust. We then evaluate the effectiveness of current controls in reducing on-highway emissions of these MSATs. Our analysis shows that the programs we currently have in place or have recently proposed are expected to yield significant reductions of mobile source air toxics. Between 1990 and 2020, these programs are expected to reduce on-highway emissions of benzene, formaldehyde, 1,3- butadiene, and acetaldehyde by 75 percent or more. In addition, we expect to see on-highway diesel PM emission reductions of over 90 percent. We then consider whether there are additional air toxics controls that should be put in place at this time to further reduce on-highway MSAT inventories. With regard to fuels-based controls, we are proposing a gasoline benzene control program that requires refiners to maintain the current levels of over-compliance with RFG and anti-dumping toxics requirements. Because the proposed standard for each refinery is the same as the 1998-1999 average gasoline benzene level for that refinery, EPA currently anticipates that the proposed standards would impose only negligible costs, if any. With regard to additional vehicle-based controls, we conclude that it is not appropriate at this time to propose more stringent standards than the technology forcing standards found in our recently adopted Tier 2 and recently proposed HD2007 rule standards. Finally, because of our concern about the potential future health impacts of exposure to the public of air toxics from the remaining emissions from mobile sources in the future, including emissions from nonroad equipment and fuels, we propose to continue our toxics-related research activities, in conjunction with other activities currently being conducted by the Agency. These include our National Air Toxics Activities (NATA) and the National Air Toxics Program: The Integrated Urban Strategy (UATS). Under this strategy, EPA will continue to improve our understanding of emissions inventories, assessments of exposure, and the need for and appropriateness of additional mobile source air toxics controls for on-highway and nonroad sources. Based on the information developed through this research, EPA is proposing to conduct a future rulemaking to evaluate whether such additional mobile source air toxic controls should be adopted. This rulemaking would be completed no later than 2004. | 2000-08-04 | 2000 | 8 | https://www.federalregister.gov/documents/2000/08/04/00-18640/control-of-emissions-of-hazardous-air-pollutants-from-mobile-sources | https://www.govinfo.gov/content/pkg/FR-2000-08-04/pdf/00-18640.pdf | Environmental Protection Agency | 145 | A range of compounds known as hazardous air pollutants are emitted from motor vehicles and fuels and are known or suspected to have serious health impacts. This document describes EPA's program to address emissions of hazardous air pollutants from... |