4.1.5 Tank filling at back worker
I saw worker is working Appropriate protective clothing must be worn when handling the formulated pesticide and filling the spray tank.
Liquid formulations remain the most popular as they are easy to measure and pour. The spray tank is half filled with water and the pump engaged to provide gentle agitation. The products must be introduced into the tank as per label recommendation, usually in the order of solids followed by liquids.
The spray operator is at the highest risk when handling the pesticide concentrate. Where closed transfer systems are used for tank loading operator contamination is reduced. However, such systems must be thoroughly cleaned after use and transfer valves must be designed to be leak free when operated (dry-break couplings).
Chemical containers must be kept secure when in use in the field. When appreciable distances are involved for the sprayer and the containers are left unattended, they must always be closed and secured from unauthorised interference.
All spray operators must be fully trained and aware of the procedures to be carried out in the event of accidental spillage during tank filling.