A study in Pennsylvania conducted by Duke was released earlier this week that revealed sediment downstream from wastewater treatment facilities where fracking wastewater had been processed contained radioactive material in 200 times greater concentration than the streambed above the facility. These radioactive contaminants have the chemical signature of the Marcellus Shale. The study has been publicized in numerous media outlets, but here’s the story as it appears in the Christian Science Monitor and from NBC News.
This is not a major surprise. Many geologists have noted that radioactive material lay in these shale beds, and flushing the formations with the fracking fluid would likely bring these contaminants out in solution. I recall a talk from Tony Ingraffea in which he put it: “the fracking process brings to the surface a bunch of stuff we should be happy are locked up and buried down there.”
Now, once again, realize this is not documenting that hydraulic fracturing is contaminating groundwater; no, it is the “produced” water, or wastewater from the fracked well, that is contaminated. Remember the study from University of Texas that concluded there were no links to fracking and water contamination (though the study is actually being redone since it was funded in large part by the inudstry)? Go back to my post from February 16, 2012 and see what I highlighted from that report: it’s the activity associated with fracking – the above ground handling of materials and waste that cause contamination. But fracking cannot be done without without producing waste at the surface.
Personally, I am weary of what elements are bound in our Triassic Basins that would come to the surface when fracked. I understand about the need to extract minerals from the earth for beneficial uses, but what sets fracking apart is the treatment of the flow back and produced water. Our wastewater treatment facilities are not equipped to treat this waste. Add to that something I have said before: the set up of remote industrial sites that are fracking wells makes full wastewater treatment more difficult.