Trichloroethylene and tetrachloroethylene are two examples of polychlorinated hydrocarbon solvents that have been commonly used in industry and in consumer products. ChemRisk^® has performed more than 100 risk assessments evaluating the possible health effects of TCE, PCE and other volatile organic compounds (VOCs) when present in soil, groundwater, drinking water, workplace air, the home, and the ambient air.