Recently, we took a field trip [with a SPER Scientific portable radiation monitor in tow] to Red Gate Woods near Willow Springs, IL, home of the Plot M nuclear disposal site. The area is open to the public but a bit hard to find, located off a small side trail in the forest preserve. While radiation readings at the Plot M stone monument were essentially background-level, one of the numerous test well caps (kept padlocked) did appear to have higher than normal radiation counts, averaging about 0.1-0.3 mR/hr as seen from this short video clip.
