I was in the environmental business for 15 years (glad I'm out) and your last sentence sums things up quite nicely. One of my longest running projects was proving to the state that asphalt from Dallas city roads that were used as fill on private property did not adversely affect the environment. Stupid, stupid, stupid.
Did nobody realize that, had they been able to prove the pavement hazardous, the city and county could both have been tasked with cleaning up the enormous "hazardous substance" deposits lining the surface of every municipal right-of-way?
Not to mention resurfacing all the roads with concrete?