a) General − Off-site transport or storage, treatment, destruction, or secure disposition off-site may be provided in cases where IEPA determines that such actions:

1. 1) Are more cost-effective than other forms of remedial actions;
2. 2) Will create new capacity to manage, in compliance with Subtitle G of the Board's regulations (35 Ill. Adm. Code 700: Subtitle G, Chapter I), hazardous substances in addition to those located at the affected facility; or
3. 3) Are necessary to protect public health, welfare, or the environment from a present or potential risk which may be created by further exposure to the continued presence of such substances or materials.

b) Contaminated soils and sediments may be removed from the site. Technologies used to remove contaminated sediments on soils include:

1. 1) Excavation;
2. 2) Hydraulic dredging;
3. 3) Mechanical dredging.