According to the rule, the solid waste are defined as: waste in the solid and semi-solid state, that result from industrial origin, domestic, hospital, commercial, agricultural, from services and sweeping. It is also included on this definition the sludge from the water treatment systems, those generated in equipment and installations of pollution controlling, as well as some liquids whose particularities become impracticable its launching in the public sewerage or water bodies or that demand, for this, impracticable technical and economical solutions facing the best available technology.
The classification of the solid waste, according to the rule, was defined like:
Waste type II B ? inert: they are any waste that, when showed in a representative way and submitted to a dynamic and static contact with distilled or deionized water and at room temperature, do not have any of their constituents solubilized at concentrations above water potability standards, excepting for aspect, color, turbidity, toughness and flavor.