At my house there was an old shed covered with an asbestos roof. Last spring I decided to have the roof removed. It came as a pleasant surprise to observe the manner in which the roof was removed by a very specific division of labor. There appeared to be a clear division of tasks between the various parties needed in the process of remediation.
Firstly, I had to contract one company for conducting an inventory and risk analysis. Then another company removed asbestos which was verified by yet another company. And sometimes, on random basis, the municipality comes over to check the whole situation.