Area of concern or “AOC” shall mean any area that has had a probable release of a hazardous waste or hazardous constituents and that is determined by the Department to pose a current or potential threat to human health or the environment.
Concern means an expression of worry or doubt over an issue considered to be important for which reassurances are sought;
Compound of Concern means a contaminant that, based on generally available information, may be emitted to the atmosphere in a quantity from any source at the Facility that is significant either in comparison to the relevant Ministry Point of Impingement Limit or if a Ministry Point of Impingement Limit is not available for the compound then, based on generally available toxicological information, the compound has the potential to cause an adverse effect as defined by the EPA at a Point of Impingement.