So, this begs a few questions. First, where are these sites? This (Google map link; found at atomicheritage.org) claims to show “the important locations of the offices, control centers, mines, mills, plants, laboratories, and test sites of the U.S. nuclear complex from the early 1940s to the present.”
Interesting to me, St. Louis has a number of sites – far more than the single one in my native Baltimore – but none particularly near the elementary school in question. Did they really just stash this crap anywhere, say on the edge of town?
Second question: Can you recommend a good radiation detector at reasonable cost?