APPENDIX B – EXAMPLES OF AIR POLLUTANTS AND MEASUREMENT LEVELS
POLLUTANT
GROUPS3
Criteria
Pollutants
Air Pollutant
of Interest (Click
on Pollutant to
obtain more
information)4
Useful Detection
Limits5
Examples of sources
Ozone
10 ppb
No direct emission sources
Carbon monoxide
1 ppm
Sulfur dioxide
10 ppb
Nitrogen dioxide
10 ppb
Mobile sources, fuel combustion, industrial
processes
Fuel combustion, industrial processes, mobile
sources
Mobile sources, fuel combustion, industrial
processes
Dust, fuel combustion, mobile sources,
industrial processes, agriculture, fires
Fine particle
matter (PM2.5)
5 µg/m³ 24-hr
Particulate matter
(PM10)
10 µg/m³ 24-hr
Lead (also an air
toxic)
Diisocyanates
0.05 µg/m³ 24-hr
0.01 µg/m³
Secondarily formed when nitrogen oxides
(NOx) and volatile organic compounds
(VOCs) react in sunlight
Consists of both primary and secondarily
formed pollutants
Dust, fuel combustion, agriculture, industrial
processes, mobile sources, fires
Mobile sources, industrial processes, fuel
combustion
Chemical analysis of collected particulate
is required. Measurements typically
collected by TSP or PM10 samplers.
0.05 µg/m³
2,4-toluene
diisocyanate
1,6-hexamethylene
diisocyanate
Carbonyls
Methylenediphenyl
Additional Notes
Acetaldehyde
0.001 µg/m³
0.1 µg/m³
Industrial processes (e.g., urethane foam
production)
Polyurethane paints
Mobile sources, combustion, industrial
processes, tobacco
3
All pollutant groups other than criteria pollutants are considered air toxics
This column is hyperlinked to either the EPA Six Common Air Pollutants website (http://www.epa.gov/airquality/urbanair/) or the Technology Transfer Network
Air Toxics website (http://www.epa.gov/ttn/atw/).
5
Approximated for detection at the levels of the Air Quality Index (AQI) for the criteria pollutants, and at the levels of chronic human health benchmark values for the air toxics
4
23
DRAFT 3/8/2013
