Related by context. Frequent words. (Click for all words.) 64 coal ash 50 mine tailings 49 fracking 49 methane 49 tailings 49 leachate 48 hydraulic fracturing 48 sludge 48 contaminated groundwater 48 sediment 47 methane gas 47 groundwater 47 Massey Energy 47 MSHA 47 slurry 46 coal mine 46 drilling fluids 46 coal mining 46 impoundments 46 wastewater discharge 46 hydrofracking 46 TDEC 45 coal mines 45 Sago Mine 45 wastewater 45 mountaintop mining 44 Clean Water Act 44 mountaintop removal 44 DEQ 43 Surface Mining 43 Crandall Canyon 43 West Virginia 43 coalfield 43 suspended solids 43 groundwater contamination 43 ADEQ 42 hydrogen sulfide 42 coalbed methane 42 toxic sludge 42 coal 42 tritium 42 W.Va. mine 42 reservoir 42 Mine Safety 42 cyanide 42 PFOA 42 DEP 42 sewage 41 dewatering 41 Manchin 41 dam 41 asbestos contamination 41 coal seam 41 tailings pond 41 Gov. Joe Manchin 41 vinyl chloride 41 IDEM 41 contaminants 41 sewage overflows 41 Fracking 41 Mine Workers 41 poisonous gases 40 contaminant 40 leaching 40 brine 40 mercury pollution 40 untreated sewage 40 dams 40 coal gasification 40 Patriot Coal 40 contaminated soil 40 sulfuric acid 40 Sago 40 leach 40 toxic waste 40 mountaintop removal coal 40 radioactive waste 40 toxic chemicals 40 toxic algae 40 coal gasification plant 40 toxic pollutants 40 septic tank 40 contaminated sediment 40 poultry litter 40 TVA 39 raw sewage 39 selenium 39 coal seams 39 Sago mine 39 DHEC 39 ammonia 39 tailings ponds 39 hazardous waste 39 effluent 39 CEO Don Blankenship 39 radioactive materials 39 coalmine 39 Vermont Yankee 39 sulfide 39 arsenic 39 radionuclides