3) Secondary PM2.5 impacts associated with Discoverer and Associated Fleet
45precursor emissions are expected to be low near the emission release points where
46modeled concentrations associated with primary PM2.5 emissions are highest,
Public Review Draft 03/04/2013
because there has not been enough time for the secondary1 chemical reactions to
2occur. Conversely, secondary PM2.5 impacts are more likely to be higher farther
3from the Discoverer and the Associated Fleet where impacts from primary PM2.5
4emissions from the Discoverer and the Associated Fleet are expected to be lower.
5This makes it unlikely that maximum primary PM2.5 impacts and maximum
6secondary PM2.5 impacts from the Discoverer and the Associated Fleet will occur
7at the same time (paired in time) or location (paired in space). See March 23,
82010 PM2.5 Guidance Memo at 9.
4) The relatively small amount of NOX emissions (a PM2.5 precursor) that will be
11authorized under these permits in comparison to existing NOX emissions in the
12North Slope area in general, together with the generally low levels of PM2.5
13recorded at monitoring stations in the area, make it unlikely that NOX emissions
14from the Discoverer and the Associated Fleet would cause or contribute to a
15violation of the PM2.5 NAAQS.
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castellano: DISPER CUSTIC DESCAR RADIA italiano:
deutsch: DIS CUS DES RAD
castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
français: DIS CUS DES RAD