In determining the scope, nature and content of a hazardous substance cleanup plan the director shall evaluate reasonable alternatives and select or approve those actions which he determines are necessary to protect human health and the environment. The goal of any pertinent action shall be cleanup and containment of the site through the elimination of the threat to the human health and the environment posed by the hazardous substance. In choosing the necessary action at each site, the director shall consider the following factors:

1. (1) The technological feasibility of each alternative;
2. (2) The cost estimate of each alternative;
3. (3) The quantity of hazardous substances present, their toxicity and mobility and the risk of harm to the environment. This factor shall not require the director to make a detailed analytical and scientific study of the site prior to choosing or approving the selected alternative, however, the director shall make a good faith effort to generally determine this information to aid his choice of alternative actions.
4. (4) The capability of the selected alternative to protect human health and the environment.

(Acts 1988, 1st Ex. Sess., No. 88-859, p. 348, §6.)