Related by context. Frequent words. (Click for all words.) 58 trichlorethylene TCE 58 tetrachlorethylene 56 carbon tetrachloride 56 PCBs polychlorinated biphenyls 55 suspected carcinogen 54 chlorinated solvents 54 trichlorethylene 53 perchlorethylene 53 methylene chloride 53 carcinogenic chemicals 52 fracking fluid 52 chlordane 52 sodium dichromate 51 contaminating groundwater 51 benzene toluene 50 contaminate groundwater 50 frac fluid 50 Hydrochloric acid 50 groundwater contamination 50 polychlorinated biphenyls PCBs 50 solvents 49 radioactive tritium 49 dieldrin 49 trihalomethanes 48 Toxic chemicals 48 vinyl chloride 48 polychlorinated biphenyls 48 TCE 48 ethylbenzene 48 picocuries 48 polybrominated diphenyl ethers 48 #,# dioxane 47 Contaminants 47 hexavalent chromium 47 polluted groundwater 47 cleaning solvents 47 corroded pipe 47 Dioxins 47 methamidophos 47 Hydrogen sulfide 47 hexane 47 contaminated 47 fracking fluids 47 coal slurry 46 contaminate drinking 46 contaminated groundwater 46 Nitrates 46 ammonia fumes 46 organophosphate pesticides 46 dioxin contaminated 46 vermiculite mine 46 methyl tertiary butyl ether 46 perchlorate 46 disinfection byproducts 46 milk powder tainted 46 contaminants 46 MtBE 46 elemental sulfur 46 contamination 46 organophosphates 46 iron manganese 45 Elevated levels 45 PCBs 45 diazinon 45 tritium 45 perfluorooctanoic acid 45 E coli bacteria 45 wood preservative 45 preservative thimerosal 45 gasoline additive MTBE 45 arsenic cadmium 45 arsenic 45 arsenic mercury 45 naturally occurring bacteria 45 picocuries per 45 ethyl acetate 45 contaminant 45 Soil samples 45 potassium permanganate 45 harmful contaminants 44 phosphine 44 MTBE 44 faulty boiler 44 Sulfur dioxide 44 colorless liquid 44 Response Compensation 44 ethyl mercury 44 synthetic estrogen 44 Sulfate 44 degreasers 44 methyl mercury 44 PAHs 44 Methyl 44 bromate 44 contaminated soils 44 pCi L 44 cyanuric acid 44 toxic vapors 43 inorganic arsenic 43 Perchlorate 43 gamma tocopherol