More science needed to assess the safe treatment of oil and gas operations produced water #KeepItInTheGround

Oil and gas evaporation pond

From The Greeley Tribune (Nikki Work):

The U.S. produces about 900 billion gallons of wastewater per year from oil and gas development, such as hydraulic fracturing. Some of the reuses proposed for this water include irrigation or discharging into surface water, but the chemical content and potential health implications of this water are still largely question marks to the scientific community. Currently, this wastewater is disposed of, either through evaporation, into pits or through underground injection.

But according to recent research out of the Colorado School of Mines in Golden, the question at this point isn’t even about what is in the water or if it is safe. It’s about coming up with the methods necessary for science to even tackle those questions.

Karl Oetjen, Mines doctoral candidate and one of the lead authors on the paper, published in August in “Trends in Environmental Analytical Chemistry,” said there’s no adequate way to measure the chemical makeup of the wastewater from hydraulic fracturing. All of the current methods used to test the quality of water — such as surface water, ground water and even wastewater from other sources — don’t take into account the high saline content of the water or the numerous chemicals in it. These methods weren’t intended to test water so complex, he said. And since there’s a high level of variability in the water resurfacing from each well, it’s difficult for researchers to even pinpoint what they should be testing.

“If you’re worried about introducing this water to places where it could interact with the environment or human health, it’s impossible to say if it’s dangerous or not dangerous because we simply don’t know,” Oetjen said.

He describes the process of looking for certain contaminants in surface water as looking for a needle in a haystack. But when you’re looking for contaminants in oil and gas wastewater, you’re looking for a needle somewhere in a million haystacks.

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