Construction sites can be full of #toxicsubstances that mainly find their way into dust. An even bigger danger are #solvents which can be found in adhesives, paints, and cleaning fluids.
This was the case with a recent #demolition we were contracted to do where their was leftover dry cleaning agents at the site. Samples had to be taken, #environmentalreports filled out, and removal and dumping of materials had to be secured, before our crew could go in a knock the building.