Chuck

I observe that a picture was provided, and a statement made regarding 'dense smoke'. I haven't seen diesel engines smoke that bad, and if they did, the smoke would be black. I suspect that what is being termed 'dense smoke' is actually water vapor. The fracturing process uses water, and the fluid is largely water on a volume basis. There are points in the aboveground equipment that are open to atmosphere. On a cool morning, the fluid will fog, just as you tend to see around stock tanks and farm ponds.