jlow said:
I have a Ph.D. in pharmacology/toxicology with 30 years of research experience. I will however not count myself as a airborne contamination specialist but I have a very good understanding of toxicology and contamination since that is part of my job.
We talked about the term dilution. It of course does not in any way means it goes away. If you know nuclear physics, you will know nothing really goes away, it either gets diluted or changed to something else. I of course completely agree with you that dilution does not always mean it goes away but sometimes dilution is the only option. This is why in the nuclear industry, you are sometimes allowed to release radioactive material into the air and water i.e. it is a small amount and the dilution is great.
Trust me, when we talk about particle contamination (not gas but solids), particle size is the major factor because of the reasons I mentioned. Now, this relates to insoluble material and also to material that is not easily absorbed through skin because if it can be absorbed through your skin, we can completely forget about worrying about inhalation toxicology because you can get it right through the skin.
Actually, it does go away. It leaves your body over time. I've been crapped-up (contaminated) many times. I have also absorbed tens of thousands of millirem's of radiation. Both have vacated my body and organs. I am subjected to a full body count each and every time I enter a nuke plant. As of the last outage I worked in February of this year, I have a zero reading. Whether lead ever leaves one's body or doesn't, I really don't know. I do know that any type of dust, can, and will, be absorbed by our skin. I happen to know a couple of toxicologists, and they wear protective clothing. As I stated earlier, it's the reason we wear protective clothing when exposed to any type of contamination. BTW:
You aren't going to BS me. I work in and with it. I don't have to be right, however, in this case, I am
Congrats on your Ph.D

I won't tell you the field in which I earned mine.