I don't know if I called it an “obligation”, but it's step 3 in the federal contaminated sites action plan guidance that you notify and engage stakeholders about known or documented contamination at a federally contaminated site. I would probably call it guidance.
I reviewed only the 2017 studies. We didn't have access to the previous ones or funds for that. In those studies, it appears to me that it was designated a contaminated site in 2014, so whoever the government of the day was in 2014 would have had the responsibility to notify the stakeholders.
I'll leave it there. I'll see if I get a question about health effects.