Contamination charges have a traceable cause
When a waste contractor charges for contamination, the cause is usually identifiable: cardboard bins receiving general waste, plastics receiving timber, or a recyclable stream receiving liquid. It happens at the point of disposal, which is scattered across the site and usually involves staff rather than cleaners, though cleaners are frequently blamed.
The fix is to make the streams unambiguous at every disposal point and to assign responsibility explicitly. Colour, signage and physical separation help. So does removing the general waste bin from a location where a recyclable stream should be used. These are operational decisions, but a cleaning plan that identifies the failure points contributes usefully to them. Recording the disposal points on a simple plan, with the streams available at each, is usually the fastest way to see where the ambiguity sits.
