I'm afraid you are correct. This is a huge facility and much of it is too contaminated to examine thoroughly, and because it was that way when first we got there, there is no real guarantee that we even know the complete layout of the place. Worse, that people who did know the place are now allies of ISIS.
For anyone still wondering why we didn't "destroy" the stuff, that turned out to be the work of more than a decade even with the U.S.'s modest stocks in proper containment. And even with the care the Army took, we had leaks during the process. This stuff isn't like that, it's already in the environment of the place, in the walls, the flooring, in the concrete - at the very best the facility is an appalling toxic waste dump.
Much of this can be concocted in a decent laboratory more easily than scrounged from a toxic waste dump, and ISIS just stole half a billion dollars for a war chest. If they want it badly enough they can buy the means to make it. Some of it, however, specifically the VX, is a bit harder to come by. We know Saddam made it. The lethal dose is 17 milligrams on the skin, a small drop, roughly a hundredth of the lethal dose of Sarin. That isn't "weaponizable" or "militarily exploitable," it's a weapon all by itself, ready to go.
The good news is that it's difficult to turn what we do know about into a weapon, or at least most of it. The bad news is what we don't know about.
The unknown unknowns.
The really bad news is the many millions of Americans were led to believe by the leftist media and their Dem puppets that Saddam NEVER!!! had any wmds. I’ve argued with Dem friends and family members about this. They were adamant that Hussein NEVER!!! had any wmds...it was all a lie from Bush-Cheney to get their hands on Iraqi oil. Let’s see if the NY Slimes and the Wash Compost make anything about this latest news. I’ll bet they don’t mention it.