Sludge Law and Legal Definition

According to 49 CFR 1155.2 [Title 49 – Transportation; Subtitle B Other Regulations Relating to Transportation; Chapter X Surface Transportation Board, Department of Transportation; Subchapter B Rules of Practice; Part 1155 Solid Waste Rail Transfer Facilities; Subpart A – General], sludge means “any solid, semi-solid or liquid waste generated from a municipal, commercial, or industrial wastewater treatment plant, water supply treatment plant, or air pollution control facility exclusive of the treated effluent from a wastewater treatment plant.”