It is preferable that they be left on or adjacent to public roads and that personnel proceed on foot with smaller equipment. Workers should move about on the land as little as possible and stay for as short a time as possible. On leaving the premises, workers should cleanse and disinfect their protective clothing and equipment. Any vehicles taken onto the site should be cleansed and disinfected. The whole vehicle must be thoroughly cleaned and free from mud, dung and any other dirt.
Disinfectants are only effective in clean conditions.
Not only does dirt act as a barrier between the disinfectant and the surface to be disinfected. It also interacts chemically with the disinfectant to render it less effective. Particular attention should be paid to the hidden underside of the vehicle, including the wheel arches where dirt tends to cling and cake, and to the tyre tread or tracks. The dirt should first be soaked with disinfectant. This should be done using a low-pressure applicator such as a knapsack sprayer.