How to prevent tank truck operators from stealing benzene during unloading

Thread Content

Our company needs benzene as a raw material in its production, with a monthly consumption of around 1,800 tons. Current transportation relies mainly on tank trucks, with around 60 trucks per month. One problem at present is that carriers engage in stealing benzene during transportation and unloading, using various methods that are difficult to detect. Some even have hidden compartments inside the tank, filled with water, which are controlled by pneumatic valves. Those who have experience in this area or have encountered similar situations can share their insights to give me some advice on preventing theft. Although the company has strengthened its management now, there are still two situations that are difficult to prevent: 1) Collusion between warehouse staff and tank truck drivers, with the latter bribing the former in various ways. 2. There is a hidden compartment within the tank truck, filled with water; during the unloading process, the driver uses a pneumatic valve to release the water from this hidden compartment into the tank, where it acts as benzene. Are there any other methods? I hope experienced users can give some advice.