Complying with 1-Hour NO2 NAAQS
(Zephyr Environmental Corp., Austin, TX)
The US EPA has recently promulgated a totally new short term National Ambient Air Quality Standard (NAAQS) for NO2. This 1-hour standard became effective April 12, 2010 and is set at 100 parts per billion (ppb) or 188 micrograms per cubic meter (μg/m3). For premit activity to authorize new or modified combustion sources, site wide modeling to demonstrate compliance with the 1-hour NO2 NAAQS is likely to be required. The presentation will inform the audience that non-compliance is common, often due to emissions from emergency engines. Techniques for modifying sources and operations to improve modeling results will be detailed.