Tag: chemical tracers

Environmental activists are calling on Colorado officials to require oil and gas companies to chemically tag the fluids used in hydraulic fracturing, an increasingly controversial natural gas drilling process. Many suspect that "fracking" may be contaminating ground water and chemical tags would make it possible for regulators to identify the source of any contamination. The idea is a hot topic among those favoring increased federal oversight of the process, but industry officials won’t even discuss the idea, and state regulators say it’s barely on their radar screens.