Residual waste is nonhazardous industrial waste.
It excludes certain coal mining wastes and wastes from normal farming activities. Pennsylvania businesses and industries generate at least 38 million tons of solid residual waste each year. A larger amount is generated in liquid or semi-liquid form. Residual waste is composed of a wide variety of materials. As the examples indicate, residual waste is highly diversified, both in type and in its potential to harm public health and the environment when improperly managed.