federal_register: E7-18346
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| document_number | title | type | abstract | publication_date | pub_year | pub_month | html_url | pdf_url | agency_names | agency_ids | excerpts | regulation_id_numbers |
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| E7-18346 | Prevention of Significant Deterioration (PSD) for Particulate Matter Less Than 2.5 Micrometers (PM2.5)-Increments, Significant Impact Levels (SILs) and Significant Monitoring Concentration (SMC) | Proposed Rule | The Clean Air Act (Act) authorizes EPA to establish regulations to prevent significant deterioration of air quality due to emissions of any pollutant for which a national ambient air quality standard (NAAQS) has been promulgated. The NAAQS for particulate matter using the PM<INF>2.5</INF> indicator were promulgated in 1997. The EPA is proposing to facilitate implementation of a PM<INF>2.5</INF> Prevention of Significant Deterioration (PSD) program in areas attaining the particulate matter less than 2.5 micrometers (PM<INF>2.5</INF>) NAAQS by developing PM<INF>2.5</INF> increments, Significant Impact Levels (SILs), and a Significant Monitoring Concentration (SMC). In addition, EPA is proposing to revoke the annual PM<INF>10</INF> increments. "Increments" are maximum increases in ambient PM<INF>2.5</INF> concentrations (PM<INF>2.5</INF> increments) allowed in an area above the baseline concentration. The SILs and SMCs are numerical values that represent thresholds of insignificant, i.e., de minimis, modeled source impacts or monitored (ambient) concentrations, respectively. The EPA is proposing such values for PM<INF>2.5</INF> that will be used as screening tools by a major source subject to PSD to determine the subsequent level of analysis and data gathering required for a PSD permit application for emissions of PM<INF>2.5</INF>. | 2007-09-21 | 2007 | 9 | https://www.federalregister.gov/documents/2007/09/21/E7-18346/prevention-of-significant-deterioration-psd-for-particulate-matter-less-than-25-micrometers | https://www.govinfo.gov/content/pkg/FR-2007-09-21/pdf/E7-18346.pdf | Environmental Protection Agency | 145 | The Clean Air Act (Act) authorizes EPA to establish regulations to prevent significant deterioration of air quality due to emissions of any pollutant for which a national ambient air quality standard (NAAQS) has been promulgated. The NAAQS for... |