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Экология ВИЭ / СЭС / Final Programmatic Environmental Impact Statement for Solar Energy Development.pdf
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1 4.11.4 Update to Section 4.11.2.5 of the Draft Solar PEIS: General Conformity

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3• As requested by comments, the discussion of General Conformity in

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Section 4.11.2.5 of the Draft Solar PEIS has been updated and the new

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regulations have been referenced.

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7Federal departments and agencies are prohibited from taking actions in nonattainment

8 and maintenance areas unless they first demonstrate that the actions would conform to the SIP as

9it applies to criteria pollutants. Transportation-related projects are subject to requirements for

10transportation conformity. General conformity requirements apply to stationary sources.

11Conformity addresses only those criteria pollutants for which the area is in nonattainment or

12maintenance (e.g., VOCs and NOx for O3). If annual source emissions are below specified

13threshold levels, no conformity determination is required. If the emissions exceed the threshold,

14a conformity determination must be undertaken to demonstrate how the action will conform to

15the SIP. Nonattainment and maintenance designations change over time, and, when a specific

16project is proposed, BLM must conduct a conformity analysis of the proposed action as specified

17in the General Conformity regulations found in Volume 75, page 17254 of the Federal Register,

18April 5, 2010.

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21 4.11.5 Addition of New Section 4.11.4: Toxic Dust and Snowmelt

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23A discussion of toxic dust and snowmelt is being added in response to comments; this

24information did not appear in the Draft Solar PEIS.

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26Dust particles can travel great distances from their sources, even going across

27oceans and continents (Husar et al. 2001; Joy 2005; McCarthy 2004; McClure

282009). Larger particles quickly fall near their sources, but most smaller particles

29remain airborne for long periods of time before being removed by dry or wet

30deposition. These dusts could transport fungi, disease-causing organisms, metals,

31chemicals, and pesticides, which could sometimes have adverse impacts on

32human health and welfare, the economy, and/or distant ecosystems. Well-known

33global dust source areas include the arid deserts and loess areas of Mongolia and

34northern and western China and the Sahara Desert and Sahel regions in Africa. In

35recent decades, increases in dust in these areas have been observed, primarily

36related to climate change, regional meteorology, and, above all, land use changes

37caused by population growth (e.g., deforestation, overgrazing, and disturbances

38on fragile desert soils by vehicles). In spring, the Asian dust originating from

39China or Mongolia can be transported by the prevailing westerlies to East Asia

40and the Pacific Ocean and can be observed as a spike in many monitoring stations

41in the United States. In addition, the Saharan dust can be transported not only to

42the Caribbean and the U.S. Continent by trade winds blowing from east to west

43but also north to Europe and Asia. In North America, the southwestern deserts

44such as the Great Basin, Colorado Plateau, Mojave, and Sonoran Deserts are the

45sources of the majority of mineral aerosol emissions (Neff et al. 2008). Human

46activities in these regions have significantly increased the amount of wind erosion

Final Solar PEIS

4-26

July 2012