1. Fly ash, bottom ash, slag and waste removed from flue gas from the combustion of coal or other fossil fuels;
2. Solid waste from extraction, beneficiation and processing of ores and minerals, including phosphate rock and overburden from the mining of uranium ore;
3. Dust from cement kilns; and
4. Drilling fluids and other wastes produced by exploration, development or production of oil, gas or geothermal energy.
(Added to NRS by 1981, 882; A 2003, 2115)