So at about 1:00pm today, I was looking towards the direction of the airport and saw a fairly substantial column of black smoke rising for a few minutes. I was less than 1.5 miles away. I couldn't be sure it was coming from the airport, but it was definitely in the vicinity.
My first thought was maybe they're burning some residual materials away...? Again, not sure it was at the airport, but nothing else like that would be in the area.