Mixing and loading may be the most hazardous activities associated with normal pesticide use. Because of the concentrations and quantities of pesticides involved, accidental releases of pesticides at a mixing and loading site pose a high risk of ground and surface water contamination. Also, when you mix and load, you handle a pesticide in its most concentrated form and experience the greatest potential for exposure. To prevent pollution and safeguard human health, the mixing and loading of pesticide and the washing and rinsing of equipment should be conducted in a safe and environmentally responsible fashion.