Tank truck unloading activity

At this point the unloading activity appeared normal (see Figure 2-3). In less than an hour, the truck driver checked the sight glass on the truck and informed the control room that the truck was empty. The busy operator passed by and observed that the unloading hose was still vibrating, indicating to her that the tank truck was not quite empty. 

The process of unloading an HF truck or tank car can be very hazardous were there to be a hose rupture or other event leading to a spill. This activity must be thoroughly controlled through the use of detailed procedures and all persons must have the highest level of training. They must also wear the correct PPE to protect themselves should there be a release. 

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