CD Ventilation Rate Guideline
- I <14,500 No Burn
- II 14,500 – 29,000 No burn until Inversion has Lifted
- III 29,000 – 58,000 Daytime only
- IV 58,000 – 117,000 Anytime
- V >117,000 Excellent smoke dispersion
Calculations for Category Day
Multiply mixing height X transport speed.
Example:
Mixing height = 6,000
Transport speed = 8 mph
6,000 X 8 = 48,000 = Category III
Daytime burning only.