Related by context. Frequent words. (Click for all words.) 48 COGCC 48 injection wells 46 Marcellus Shale wells 45 wireline logs 45 fracking fluid 44 desorption 44 wells 44 methane 43 methane hydrate 43 Neslin 43 subsurface 43 methane hydrates 42 wellbore 42 Marcellus wells 42 total dissolved solids 41 overpressure 41 Beaudo 41 fracking fluids 41 DEP 41 groundwater contamination 41 downdip 41 reinjection 41 coal seams 41 contaminants 41 NJDEP 41 gas hydrates 40 drillings 40 groundwater 40 PennEnvironment 40 drilling 40 methane gas 40 dewater 40 wireline logging 40 fracing 40 hydrogen sulfide 40 hydraulic fracturing 39 vapor intrusion 39 exploratory drilling 39 OEPA 39 ash ponds 39 coal seam 39 corrosion 39 hydrocarbon 39 MSHA 39 chemical vapors 39 marine sediments 39 dissolved solids 39 Slaiby 39 sediment 39 flammable gases 39 hydrofluoric acid 39 BOEMRE 38 geological formations 38 fine particulate 38 NIOSH 38 ruptured pipe 38 wells drilled 38 Sulfur dioxide 38 naturally occurring methane 38 tritium 38 compressor stations 38 Bresland 38 deepwater wells 38 hydrocarbons 38 arsenic contamination 38 sulfide mineralization 38 coal slurry 38 spokeswoman Amy Louviere 37 mercury vapor 37 sumps 37 groundwater remediation 37 polluted groundwater 37 shales 37 tritium leak 37 radionuclides 37 shale 37 hydrogeological 37 ERCB 37 coalbed methane 37 DEQ 37 chlorinated solvents 37 chlorides 37 odorant 37 toxic vapors 37 longwall mining 37 Geochemistry 37 hydrogen fluoride 37 fracs 37 hydrogen sulphide 37 Bellekeno 37 wellhead 37 leaks 37 dewatering 37 radioactive contaminants 36 gas condensate 36 liquids 36 Krancer 36 ATSDR 36 Marcellus shale 36 ammonia 36 Petsec