character of the vicinity? Appendix IX: Environmental Quality Guidelines for Ghana Ambient Air Quality Guidelines Substance Averaging Time Time Weighted Average (TWA) 900 µg/m3 Industrial 1 hour 700 µg/m3 Residential 1 hour 150 µg/m3 Industrial 24 Sulphur Dioxide (SO2) 100 µg/m3 Residential 24 hours 80 µg/m3 Industrial 1 year 50 µg/m3 Residential 1 year
character of the vicinity? Appendix IX: Environmental Quality Guidelines for Ghana Ambient Air Quality Guidelines Substance Time Weighted Average (TWA) Averaging Time Sulphur Dioxide (SO2) 900 µg/m3 700 µg/m3 150 µg/m3 100 µg/m3 80 µg/m3 50 µg/m3 Industrial Residential Industrial Residential Industrial Residential 1 hour 1 hour 24 24 hours 1 year 1 year
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