Tank cleansing of auxinic herbicides comprising an activated charcoal/bentonite mixture

A method of removing an auxinic herbicide residue from a tank, the method comprising:

• effectuating a pre rinse cleaning of the tank with water in 5% to 30% of the full tank capacity, and removing this solution from the tank;
• introducing a cleaning composition comprising activated carbon, bentonite and a mixture of surfactants at a concentration of about 0.01% to about 10% by weight and water into the tank comprising the auxinic herbicide residue, with full tank capacity completed with water;
• and
• after less than about 1 hour, removing the cleaning composition from the tank with another rinse with water in 5% to 30% of the full tank capacity.