I was the President of this club in 1991-4. This "environmental" issue is not new. The fence which is defined by the lease has always been a bit unrealistic. As well, shooters are using hotter loads, especially the sporting clays shooters. Yes there is lead from the range beyond the fences there.
Point is, the range has been in use for over 30 years. It is not near any housing or businesses. It is not causing any problems. It is important to the community and, did I mention, it is on a military base. Military personal can shoot for free. That's right, free. The lead outside the "lease" has been there for many years (though no doubt it is being added to). Any "environmental damage" is long since done and is not getting any worse.
The marines shut down a shooting range?? They don't want their soldiers to be able to shoot trap, skeet, sporting and other clays, for FREE!!? Are you kidding me? Anybody know a general?
