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EPA Next Generation AIr Monitors

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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

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