Noxious weeds or "weeds" means any exotic plant species established or that may be introduced
Noxious weed means a plant that when established is highly destructive, competitive, or difficult to control by cultural or chemical practices.
Dangerous Substance means any radioactive emissions and any natural or artificial substance (whether in solid or liquid form or in the form of a gas or vapour and whether alone or in combination with any other substance) which, taking into account the concentrations and quantities present and the manner in which it is being used or handled, it is reasonably foreseeable will cause harm to man or any other living organism or damage to the Environment including any controlled, special, hazardous, toxic, radioactive or dangerous waste.
Dangerous Substances means a substance or article described in regulation 3 of the Dangerous Substances Regulations;
Hazardous substance UST system means an UST system that contains a hazardous substance defined in section 101(14) of the Comprehensive Environmental Response, Compensation and Liability Act of 1980 (but not including any substance regulated as a hazardous waste under subtitle C) or any mixture of such substances and petroleum, and which is not a petroleum UST system.