Which of the following best describes an active waste disposal site?

An active waste disposal site is characterized as a location where waste is currently being received. This means that the site is in operation, and waste materials are continuously being brought in for disposal. Such sites are managed to ensure that the waste is handled in accordance with regulatory guidelines, minimizing environmental impacts and health risks.

In contrast, a closed site refers to a location that is no longer accepting waste and may have undergone processes to seal or remediate the area. A site with previously disposed materials indicates that while waste may be present, it is no longer actively generating waste, which does not fit the definition of an active site. Lastly, a site under regulatory review may be undergoing assessments or evaluations for compliance with environmental standards, but it does not imply that waste is being actively disposed of there. Therefore, the defining feature of an active waste disposal site is the continual acceptance of waste materials.