In most states everything that is at all surface disturbing is disclosed, and you can look at the stuff and copy it in county and state offices. If there are test holes, they have to disclose where and when they are going to be drilled and how they are going to be drilled and reclaimed. Some states allow specific hole location information to be withheld from the public for a time as trade secrets, but it has to be on file with the regulators. If they are drilling monitoring wells to study groundwater, that's all going to be provided to regulators, and you can go in and look at it. If people want to find out what going on, a better plan is to visit state and county regulators weekly. Ask to see submissions by the company and all correspondence. Develop a professional relationship with the regulators and you'll find out a lot of stuff. Also, find professional geologists, hydrologists, etc. to provide expert advise. Start building a professional case now, because they are going to try to do whatever they can to truncate the process.
A good model for this game plan is Citizens for Safe Water Around Badger, which has worked for many years to get information and then cleanup of contamination left by the Badger Ammunition plant. They've got their own experts and have used government data too, and they've negotiated over and over. It's not a linear process, but they've done better than anyone hoped. It's never finished, of course.
Questions always arise as to whether all information is being revealed and how sound and objective that information is. They've learned they can't take anything at face value. I've followed the CSWAB work for two decades and I can't imagine the folks up north are unaware of their groundbreaking leadership. A mine isn't exactly the same as groundwater cleanup from old industrial uses, but the organizational principles are pretty universal:http://cswab.org/