Draft Environmental Impact Statement for Roca Honda Mine

Pollutant and Averaging
Time
Chapter 3. Affected Environment and Environmental Consequences
Primary
NAAQS a
NOX
Secondary
NAAQS a
Monitored
Data b
Location
1-hour maximum f (ppb) 100 100 51 Bernalillo County
Annual arithmetic mean (ppb) 53 53 12 Bernalillo County
O3
8-hour maximum d (ppm) 0.08 0.08 0.072 Bernalillo County
PM 2.5
Annual arithmetic mean e (µg/m 3 ) 15 15 6.0
24-hour maximum f (µg/m 3 ) 65 65 18.9
PM 10
Annual arithmetic mean g (µg/m 3 ) 50 50 35
24-hour maximum c (µg/m 3 ) 150 150 169
SO2
Annual arithmetic mean (ppm) 0.03 (None) (No Data)
24-hour maximum c (ppm) 0.14 (None) (No Data)
3-hour maximum c (ppm) 0.5 (No Data)
ppm = parts per million; µg/m 3 = micrograms per cubic meter
Notes:
a Source: 40 CFR 50.1-50.12.
b Source: USEPA, 2011a.
c Not to be exceeded more than once per year.
Bernalillo County
Bernalillo County
Bernalillo County
d The 3-year average of the fourth highest daily maximum 8-hour average ozone concentrations over each year
must not exceed 0.08 ppm.
e The 3-year average of the weighted annual mean PM2.5 concentrations must not exceed 15.0 µg/m 3 .
f The 3-year average of the 98th percentile of 24-hour concentrations at each population-oriented monitor must not
exceed 65 µg/m 3 .
g The 3-year average of the weighted annual mean PM10 concentration at each monitor within an area must not
exceed 50 µg/m3.
Carbon Monoxide
Carbon monoxide (CO) is an odorless, colorless gas formed by the incomplete combustion of
fuels. The single largest source of CO is the motor vehicle. When inhaled at high concentrations,
CO combines with hemoglobin in the blood and reduces the oxygen-carrying capacity of the
blood. This results in reduced oxygen reaching the brain, heart, and other body tissues. This
condition is especially critical for people with cardiovascular diseases, chronic lung disease, or
DEIS for Roca Honda Mine, Cibola National Forest 181