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Don't forget to include NORMs on the list. We had detectable levels in Quebec but, not at concentrations of toxicological significance. I would suspect the "list" will vary depending on the fracking agents used and the formation in question though. Tony Windsor M.Sc., P.Eng Tony Windsor <http://www.linkedin.com/in/tonywindsor> On 28 July 2014 05:30, David E Jackson <[log in to unmask]> wrote: > Dear All > In preparation for the deluge of "fracking applications" anticipated now > expoloraory licenses are being marketed for sale, I thought it might be > helpful to regulators, planners and practitioners to prepare a definitive > list of "Chemicals of Potential Concern" associated with fracking practices. > > I would be grateful if those that known, could point me in the direction > of a list(s) (I've seen a number of lists on US and Wikipedia type > webpages) of fracking chemicals and more importantly their respective > C4SL/GAC for soils, and health and ecological surface and ground-water > screening standards. > > I would anticipate that such a list would be used to set appropriate > operational acceptance criteria, to inform post operational clean up, and > determined suitability of the sites for future uses (and possible Part 2A > determination), thereafter? > > Best wishes, > David E Jackson > Sometime Freelancer >