Two figures sit on the balcony, all but concealed by the mesh that covers the scaffolding. They look like blow-ins, trespassers in light blue hoodies, but then they move and it’s clear they’re dressed in the flimsy over-suits that pass, on this site, for hazardous materials protection. One is an old man in a hard hat. The other is a youngster with blonde tips forming a band across the top of his head. One talks, one listens. They lean back.