Three cities, three mixes
Port Pirie is the commercial centre for farming towns such as Crystal Brook and Redhill. Whyalla adds engineering, manufacturing, salt production and a university campus to its steelworks. Port Augusta serves highway traffic and has a hospital that is part of the Flinders and outback health network.
Industrial dust indoors
Towns beside a smelter and a steelworks get fine dust on sills, ledges and vehicle-tracked floors. It's wiped damp and mopped rather than dry-dusted, so it's lifted away instead of pushed back into the air, and entry matting is part of the scope.
A loop around the gulf
The three cities are close enough to plan as one circuit. Visits in Port Pirie, Port Augusta and Whyalla can be grouped into the same scheduling block, which spreads the travel across every site on the run.