No doubt about it when it comes to hiding things away the good old O & G guys can be counted on to come up with some slick (!) solutions. Her they are taking the toxic waste by products of the fracking process out to sea. Read more: http://www.rawstory.com/rs/2014/02/28/oil-rigs-dumping-billion-of-gallons-of-fracking-waste-off-california-coast-with-ok-from-feds/#.UxEH3oBnFYg.email
Now in the UK they have extensive expertise in off-shore drilling/installations so perhaps that will be the way to go when the countryside is so congested with frack sites and their associated 'lakes' of contaminated water that other solutions must be found.