The Department of Environmental Quality amended LAC 33:V.4901, Hazardous Waste Regulations. This rule exempts certain wastewater sludges from the manufacturing of automobiles and light duty vans, pick-up trucks, minivans, and sport utility vehicles from classification as hazardous waste, provided that the sludges are placed in a permitted, lined industrial solid waste landfill. http://www.doa.la.gov/osr/reg/0811/0811.doc pp. 2391-92.