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shale development

Fracking Center Expands Wastewater Treatment Standard

shale developmentThe Center for Sustainable Shale Development, a collaborative established in 2013 between Chevron, Shell and other natural gas companies and environmental groups to set fracking standards, has expanded its wastewater Performance Standard 1 to address the treatment of shale wastewater at permitted facilities.

The expanded standard represents the culmination of a year-long effort by a working group of stakeholders from industry and NGO participating organizations to address conditions necessary for safe surface discharge of treated shale wastewater, CSSD says.

The original performance standard identified recycling and underground injection as acceptable methods of managing produced water and recognized that there was also a need to address methods of wastewater treatment and discharge. For this reason, it contained a commitment that the group would address wastewater treatment by the fall of 2014.

In evaluating water management options, the working group took into account risks associated with long distance trucking, and that outlets for recycling grow more limited as operations mature and begin to produce more water than they can recycle.

After examining current federal and state regulatory frameworks, EPA guidance, and available technologies, CSSD’s working group determined that discharge through regulated Centralized Waste Treatment (CWT) facilities would be the most appropriate expansion of wastewater disposal options.

Some wastewater treatment facilities designed specifically to treat shale wastewater are now capable of treating shale gas wastewater to levels at or better than receiving stream standards, which makes them an acceptable alternative to zero discharge.

Based on a review of existing permits and technologies, CSSD determined that the best available treatment technology currently in operation involves a combination of distillation and biological treatment and, as necessary, reverse osmosis. Because technology in this area is quickly evolving, the expanded standard allows operators to use CWT facilities that utilize technologies or combinations of technologies other than those identified on the condition that they demonstrate they can achieve equivalent or superior treatment.

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