Cool down rest/break area
Use cold storage refrigerated containers as break shacks.
Refrigerated containers are readily available and easy to ship. They can run on the integral fuel tank or be connected to shore power (genset or utility). Inside can be set up with some basic lighting and benches or cots to cool down. Keep the doors open and use plastic curtains like in a cold storage warehouse, this makes getting in and out easier and also provides some daylight. The entrance can be fenced off so as to keep the exterior of the unit outside of the contaminated area, this will provide access to maintenance personnel and fuelers/oilers. The temperature can be adjusted as needed. Also the containers can be filled with supplies for the trip to the site, no point in shipping an empty box.