Soil that arrives on the plant
Depot soil does not behave like warehouse dust. It arrives in lumps and layers on equipment, drops in the yard as machines are unloaded, and is carried into the store and the workshop on boots and tyres. Clay in particular is difficult, because it is wet on arrival, sets hard, and then breaks down into dust once it has dried on a floor. Concrete residue behaves similarly and is harder again once it has cured.
The method has to follow that sequence. Dry removal once the material has dried is far more effective than attempting to clean it wet, so timing the attendance matters more than technique. Matting at the store and office entries does a great deal, and the boot cleaning arrangement, if there is one, is worth recording as part of the scope's context. Timing the attendance after the returns have finished is the practical point.
