Approximately 10 to 30 percent of the total water used in the hydraulic fracturing process returns to the surface as what is called flowback water. This remaining water, which contains naturally occurring elements is captured and stored within the formation itself. The flowback water that returns to the surface is treated and reused or sent to deep injection wells off site that are permitted by the U.S. Environmental Protection Agency.
Are empty wells going to be used to pump in polluted oil byproducts?
August 30, 2013