ARSD 74:36:18:11. Exception to visible emission limit

The provisions of § 74:36:18:10 do not apply if all three of the following meteorological conditions exist: (1) Five consecutive days of 0.02 inches or less of precipitation each day excluding dry snow; (2) Forecasted peak wind gusts greater than 40 miles per hour; and (3) Forecasted average hourly wind speed greater than 20 miles per hour.