What's good for today, isn't necessarily good for tomorrow!
Anybody remember the EPA rules of the 70's? The ones that wipped out a ton of business owners and set the course of todays shell companies! Of course it was legal to do business that way yesterday, but we changed our minds today! Nobody can argue that the dumping practices of decades gone by, were completely out of control. The prime factor was the responsibility assessed with what you dumped, or in our case what you leave behind! Federal, State, or Local Agencies can give you a clean bill of health, but I don't believe a walk away will ever be guaranteed!
I recall a remediation project, I worked outside of the nuclear field, metals contamination. They also received a clean bill of health for the site. The final release was granted in the late 70's. Some Idiot, supported by the city officials, decided it would be a great location for a low cost housing project! Everything was great, for years, until a number of individuals started to contract strange symptoms. That action took place in the mid 90's and the company is still married to the site, at a huge annual cost! Funny, all the official who supported the housing venture have long gone. All the new officials are standing out front, pointing their fingers!
The companies view, " You said it was fine yesterday"! The Officials view point, " It ain't yesterday"!
In the D&D industry, everything seems to be maintaining itself under the rules of statistics. I just hope someone has calculated the little Billy factor into the equation! Once little Billy arrives at the house, with a chunk of DU, Strontium, or Cesium in his hand, all previous rules are VOID!
RG