1 4.11 AIR QUALITY AND CLIMATE
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3 The information presented in Section 4.11 of the Draft Solar PEIS remains valid, with the 4 following updates.
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74.11.1 Update to Section 4.11.2.2 of the Draft Solar PEIS: National Ambient Air Quality
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Standards |
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• Table 4.11-4 has been updated to reflect changes in the NAAQS and SAAQS. |
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• Figure 4.11-4 has been updated to reflect changes in nonattainment areas. The |
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map showing CO nonattainment areas has been replaced with a map of Pb |
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nonattainment areas, because the single CO nonattainment area was declared a |
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maintenance area. Currently, there are no NO2 or CO nonattainment areas in |
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the United States. Eight-hour O3 accounts for more nonattainment areas than |
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any other criteria pollutant. Many counties in California have nonattainment |
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areas for PM10 and PM2.5. Nonattainment areas for SO2 are limited to three |
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counties and nonattainment areas for Pb are limited to one in the six-state |
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study area. |
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234.11.2 Update to Section 4.11.2.3 of the Draft Solar PEIS: Prevention of Significant
24Deterioration
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• Table 4.11-5 of the Draft Solar PEIS and the associated text have been |
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updated to reflect the recently promulgated PM2.5 PSD increment. |
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29While the NAAQS (and SAAQS) place upper limits on the levels of air pollution, PSD
30regulations applying to attainment areas place limits on the total increase in ambient pollution
31levels above established baseline levels for SO2, NO2, PM10, and PM2, thus preventing
32“polluting up to the standard” (see Table 4.11-5). These allowable increases are smallest in
33Class I areas, such as national parks and wilderness areas. The rest of the country is subject to
34larger Class II increments. States can choose a less stringent set of Class III increments, but they
35have not done so. Major (large) new and modified stationary sources must meet the requirements
36for the area in which they are locating and any areas they impact. Thus, a source locating in a
37Class II area near a Class I area would need to meet the more stringent Class I increment in the
38Class I area and the Class II increment elsewhere, as well as any other applicable requirements.
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• A correction is being made to the discussion of AQRVs, as follows: In cases |
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where the PSD increments are met, if the Federal Land Manager determines |
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that there is an adverse impact on an AQRV and if the permitting authority |
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agrees, the permit may not be issued. Figure 4.11-5 of the Draft Solar PEIS |
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shows the locations of Class I PSD areas over the six-state study area. All |
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BLM-administered lands are currently designated as Class II areas, with few |
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exceptions. |
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Final Solar PEIS |
4-18 |
July 2012 |
PEIS Solar Final
19-4
2012 July
1
2
TABLE 4.11-4 National Ambient Air Quality Standards (NAAQS) and State Ambient Air Quality Standards (SAAQS) for Criteria Pollutants in the Six-State Study Area as Updateda
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Averaging |
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NAAQS |
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Pollutantb |
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Typec |
Arizonad |
Californiae |
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Nevadaf |
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New Mexicog |
Utahd |
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Time |
Value |
Colorado |
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SO |
1-hour |
75 ppb |
P |
* |
0.25 ppm |
– h |
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– |
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– |
* |
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2 |
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(655 |
g/m3) |
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700 g/m3 |
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g/m3) |
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3-hour |
0.5 ppm |
S |
* |
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– |
0.5 ppm (1,300 |
– |
* |
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(0.267 ppm) |
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24-hour |
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– |
– |
* |
0.04 ppm |
– |
0.14 ppm (365 |
g/m3) |
0.10 ppm |
* |
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(105 |
g/m3) |
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g/m3) |
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Annual |
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– |
– |
* |
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– |
– |
0.030 ppm (80 |
0.02 ppm |
* |
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NO2 |
1-hour |
100 ppb |
P |
* |
0.18 ppm |
– |
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– |
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– |
* |
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(339 |
g/m3) |
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24-hour |
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– |
– |
* |
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– |
– |
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– |
g/m3) |
0.10 ppm |
* |
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Annual |
0.053 ppm |
P, S |
* |
0.030 ppm |
– |
0.053 ppm (100 |
0.05 ppm |
* |
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(57 |
g/m3) |
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CO |
1-hour |
35 ppm |
P |
* |
20 ppm |
– |
35 ppm (40,500 |
g/m3) |
13.1 ppm |
* |
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(23 mg/m3) |
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g/m3)j |
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8-hour |
9 ppm |
P |
* |
9.0 ppm |
– |
9 ppm (10,500 |
8.7 ppm |
* |
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(10 mg/m3) |
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6 ppm (7,000 |
g/m3)k |
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6 ppm |
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(7 mg/m3)i |
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O |
1-hour |
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– |
– |
* |
0.09 ppm |
– |
0.12 ppm (235 |
g/m3) |
– |
* |
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3 |
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(180 |
g/m3) |
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0.10 ppm (195 |
g/m3)l |
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8-hour |
0.075 ppm |
P, S |
* |
0.070 ppm |
– |
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– |
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– |
* |
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(137 |
g/m3) |
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PM10 |
24-hour |
150 |
g/m3 |
P, S |
* |
50 |
g/m3 |
– |
150 |
g/m3 |
– |
* |
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Annual |
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– |
– |
* |
20 |
g/m3 |
– |
50 |
g/m3 |
– |
* |
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PM2.5 |
24-hour |
35 |
g/m3 |
P, S |
* |
12 |
– |
– |
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– |
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– |
* |
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Annual |
15 |
g/m3 |
P, S |
* |
g/m3 |
– |
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– |
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– |
* |
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PEIS Solar Final
20-4
1
2012 July
TABLE 4.11-4 (Cont.)
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Averaging |
NAAQS |
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Pollutantb |
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Typec |
Arizonad |
Californiae |
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Nevadaf |
New Mexicog |
Utahd |
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Time |
Value |
Colorado |
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Pb |
30-day |
– |
– |
* |
1.5 g/m3 |
– |
– |
– |
* |
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calendar quarter |
– |
– |
* |
– |
– |
1.5 g/m3 |
– |
* |
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rolling 3-month |
0.15 g/m3 |
P, S |
* |
– |
– |
– |
– |
* |
aDetailed information on attainment determination criteria for NAAQS and on the reference method for monitoring is available in Title 40, Part 50 of the Code of Federal Regulations. Attainment determination criteria for each state are similar to those for the NAAQS.
b CO = carbon monoxide; NO2 = nitrogen dioxide; O3 = ozone; Pb = lead; PM2.5 = particulate matter with a diameter of 2.5 m; PM10 = particulate matter with a diameter of 10 m; SO2 = sulfur dioxide.
cP = Primary standard whose limits were set to protect public health; S = Secondary standard whose limits were set to protect public welfare.
dAn asterisk indicates same as the NAAQS.
eThe State of California has standards for additional pollutants, such as visibility-reducing particles, sulfates, hydrogen sulfide, and vinyl chloride, which are not presented in this table; also refer to CARB (2012) for additional pollutants for California.
fThe State of Nevada has standards for hydrogen sulfide, which are not presented in this table; also refer to NDEP (2010) for hydrogen sulfide for Nevada.
gThe State of New Mexico has standards for additional pollutants, such as hydrogen sulfide, total reduced sulfur, and total suspended particulates, which are not presented in this table; also refer to NMED (2009) for additional pollutants for New Mexico.
hA dash indicates that no standard exists.
iLake Tahoe.
jBelow 5,000 ft (1,500 m) above mean sea level.
kAbove 5,000 ft (1,500 m) above mean sea level.
lLake Tahoe Basin.
Sources: ADEQ (2012); CARB (2012); CDPHE (2010); EPA (2011); NDEP (2010); NMED (2009); UDEQ (2012).
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FIGURE 4.11-4 Nonattainment Areas for SO2, 8-Hour O3, PM10, PM2.5, and Pb in the |
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Six-State Study Area (Note that currently there are no nonattainment areas for NO2 and |
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CO in the United States.) (Source: EPA 2012) |
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Final Solar PEIS |
4-21 |
July 2012 |