Alternative Energy Draft EA - NASA Visitor Center at Wallops Flight ...
Alternative Energy Draft EA - NASA Visitor Center at Wallops Flight ... Alternative Energy Draft EA - NASA Visitor Center at Wallops Flight ...
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Pollutant Averaging Time Table 7: National Ambient Air Quality Standards Affected Environment Primary/Secondary NAAQS NAAQS Violation Determination O3 8 hour 0.075 ppm b 3-year average of the annual 4 th highest daily maximum 8-hour average concentration CO 8 hour 9.0 ppm Not to be exceeded more than once per calendar year 1 hour 35.0 ppm Not to be exceeded more than once per calendar year NO2 Annual arithmetic mean 0.053 ppm Annual average SO2 Annual arithmetic mean 0.03 ppm Not to be exceeded more than once per calendar year 24 hour 0.14 ppm Not to be exceeded more than once per calendar year 3 hour 0.5 ppm Not to be exceeded more than once per calendar year PM10 Annual arithmetic mean 24 hours 150 µg/m 3 Revoked c Expected number of days per calendar year with a 24hour average concentration above 150 g/m 3 cannot be exceeded more than once per year on average over a 3year period Annual arithmetic mean 15 µg/m 3 PM2.5 3-year average of annual arithmetic mean 24 hour 65 µg/m 3 3-year average of 98 th percentile of the 24-hour values determined for each year Pb Quarterly average 1.5 µg/m 3 Quarterly arithmetic mean a A NAAQS violation results in the re-designation of an area; however, an exceedance of the NAAQS does not always mean a violation has occurred. b New O3 8-hour standard effective May 30, 2008. c Revoked annual PM10 standard December 2006. µg/m 3 = micrograms per cubic meter ppm = parts per million Source: Derived from EPA, 2008a NA = not applicable NO2 = nitrogen dioxide Federal regulations designate Air Quality Control Regions, or airsheds, that cannot attain compliance with the NAAQS as non-attainment areas. Areas meeting the NAAQS are designated as attainment areas. Wallops Island and Mainland are located in Accomack County, an attainment area for all criteria pollutants; therefore, a General Conformity Review (under Section 176(c) of the CAA) does not apply to the facilities prior to implementing a Federal action. Wallops Island and Wallops Mainland are considered a synthetic minor source, and the two land masses are combined into a single facility-wide State operating air permit for stationary emission sources (Permit Number 40909, amended September 8, 2009). Wallops Main Base is also considered a synthetic minor source and has its own facility-wide State operating air permit for stationary sources (Permit Number 40217, amended February 5, 2009). A facility is considered a major source in an attainment area if all of its sources together have a potential to emit (PTE) greater than or equal to 90.7 metric tonnes (100 tons) per year of the criteria pollutants, or greater than or equal to 9.1 metric tonnes (10 tons) per year of a single Hazardous Air Pollutant (HAP) or 23 metric tonnes (25 tons) per year of combined HAPs. Table 8 provides the actual emissions of criteria pollutants for calendar year 2008 at WFF based on the 2008 Annual Update Forms (NASA, 2009c). 43
- Page 15 and 16: TABLE OF CONTENTS EXECUTIVE SUMMARY
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