Gas drilling companies will try to convince you that using up to 6-million gallons of water for fracing one gas well doesn’t amount to a massive amount of water. Even if they are successful in making that argument with you, the next topic becomes flowback or brine. What do you do with the crap that comes back out of the ground?
Somewhere between 30% and 70% of the water used for hydro-fracing a gas well returns to the surface as flowback. In addition to the frac fluids added by the gas drilling companies, this water picks up other contaminants from deep in the Earth (~ 7,000 feet deep) with one of the most notable being salt.
These fluids contain sodium and calcium salts, barium, oil, strontium, iron, numerous heavy metals, soap, radiation and other components. This fluid combination becomes brine wastewater, and tanker trucks hauling it are labeled with a RESIDUAL WASTE placard. Treated brine is also sold for deicing and other applications that utilize calcium chloride, often being applied to roadways.
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