Related by context. Frequent words. (Click for all words.) 46 red sludge 45 seepage 42 No.2 reactor 41 leachate 41 cofferdam 41 polluted groundwater 40 leakage 40 Seepage 40 contaminate drinking 40 contaminating groundwater 40 contaminated groundwater 40 sumps 39 sediment 39 No.3 reactor 39 Hydrogen sulfide 38 coffer dam 38 depressurize 38 Naches River 38 ruptured pipe 38 Talmadge Creek 37 Tangjiashan 37 isomerization unit 37 hazmat crews 37 river Chenab 37 gallon propane tank 37 containments 37 earthen wall 37 underground piping 37 arsenic contamination 37 tailing ponds 37 reservoir 37 groundwater contamination 37 naturally occurring radioactive 37 groundwater 37 mercaptan 37 radiological contamination 36 contaminated 36 leak 36 Hydrochloric acid 36 outfall 36 frac fluid 36 sewage 36 dissolved solids 36 dredged material 36 Specific Questions relating 35 mine subsidence 35 fracking fluid 35 contaminants 35 raw sewage 35 debris basins 35 leaking 35 Floridan Aquifer 35 dam spillway 35 Nord Stream pipeline 35 storage tanks 35 Kleen Energy plant 35 stormwater runoff 35 hazardous fumes 35 reactor containment 35 Radioactive material 35 vapor intrusion 34 corrosion 34 Ciudad Anahuac 34 asbestos contamination 34 saltwater intrusion 34 detention basins 34 unnamed tributary 34 Leakage 34 retaining wall 34 aquifers 34 sewer backups 34 stormwater 34 aquifer 34 culverts 34 petroleum distillates 34 earthen dams 34 ruptured wellhead 34 propane leak 34 sanitary sewage 34 #,# gallons/# 34 excavated 33 stormwater drainage 33 structural integrity 33 harmless nitrogen 33 Firefighters doused 33 silt 33 watercourse 33 drainage 33 sewage overflow 33 chlorides 33 hydrates 33 radioactive leakage 33 total dissolved solids 33 benzene 33 hydrogen sulfide 33 clarifiers 33 overtopped 33 spill 33 toxic vapors 33 drainage pipe 33 sedimentation