What is a secure chemical landfill

Organic wastes (materials derived of living organisms or hydrocarbons such as oil) are chemically oxidized prior to land disposal and various proprietary stabilization techniques are used for metal-bearing waste rendering an insoluble, solid material for safe landfill disposal.

A secure chemical landfill is a carefully engineered depression in the ground (or built on top of the ground, resembling a football stadium) into which wastes are put. The aim is to avoid any hydraulic [water-related] connection between the wastes and the surrounding environment, particularly groundwater.