But then we already knew that.
https://grist.org/regulation/roadspreading-pennsylvania-fracking-waste/

Lawson’s experiences, new research, and the findings from Feridun’s records request have thrust oil and gas companies’ behavior back into the state’s political spotlight. At a state senate hearing in April, Bill Burgos, a professor of environmental engineering at Pennsylvania State University, told lawmakers “there is no more research that needs to be done” to determine whether oil and gas wastewater is safe and effective for treating roads. Burgos has published several studies on oil and gas wastewater, including one recently that found the fluid is ineffective as a dust suppressant.