If you are not having problems I wouldn't worry about it. Asbestos is not really that much worse than exposure to other types of dust. Any type of dust is bad for people. There is a very strong correlation between smoking and people who have serious problems with asbestos or other dusts. I did a lot of sandblasting with normal sand before I joined the fire department. Silicosis is every bit as serious as Asbestosis... there are not the deep pockets associated so it doesn't get hyped. You can get silicosis just by living in a very dusty area with sandy soils.
During the drought that caused the dust bowl thousands of people died from exposure to dust. When I was kid we used to burrow around in the loose grass hay in the barn and cough up all sorts of dirt.
I have been around asbestos quite a bit as well, but I do not believe that either the sandblasting or working around asbestos is the cause of my sensitive lungs. It could be heredity and chemical exposures may also have been a factor.
True. But Ron and Brian worked areas like me an both are in the ground. It’s just a gives me pause sometimes. In the old days we really didn’t know the risks, and were young enough to not pay attention.