Air Quality-Air Pollution Introduction In the past with air pollution we included mainly the outdoor pollutants, although in recent years this is not the case. Today we separate pollutants in to two categories. Primary pollutants, because they come directly from various sources, and secondary which are by-products of chemical interactions of the primary pollutants within the atmosphere. Particulates Although air pollution might be thought of as unwanted gases in the atmosphere, two of five primary …showed first 75 words of 1345 total…

…showed last 75 words of 1345 total…Maximum allowable concentration short term in living area 0.0025% Maximum exposure TWA (Time Weighted Average) in the workplace. 0.005% Maximum exposure allowed (OSHA) in the workplace. 0.02% Mild headache, fatigue, nausea and dizziness. 0.04% Serious headache - other symptoms intensify. Life threatening after 3 hours. 0.08% Dizziness, nausea and convulsions Dead within 2 to 3 hours 0.16% Headache, dizziness and nausea. Death within 1 - 2 hours. 0.32% Headache, dizziness and nausea. Death within 1 hour. 0.64% Headache, dizziness and nausea. Death within 25 - 30 minutes. 1.28% Death within 1 - 3 minutes.