|
Code |
Description |
|
NA |
Do not use land-based units to manage hazardous secondary material. |
|
SI |
Use surface impoundment(s) to manage hazardous secondary material. A surface impoundment is a natural topographic depression, man-made excavation or diked area formed primarily of earthen materials (although it may be lined with man-made materials), which is designed to hold an accumulation of liquid hazardous secondary materials or materials containing free liquids and which is not an injection well. |
|
PL |
Use pile(s) to manage hazardous secondary material. Pile means any non-containerized accumulation of solid, non-flowing hazardous secondary material that is used for storage and is not a containment building. |
|
OT |
Use other land-based unit(s) to manage hazardous secondary material. |