A vacuum hose was inserted into the sump
of a Tank. When the vacuum received a large slug of material the hose jumped
and hit the employee in the knee. There was a wire protruding out of the hose
that punctured the skin of the knee. The
injured worker was taken to a medical facility where he received
medical attention beyond first aid.
The hose was immediately taken out-of-service. It should have not been put into service at the start. Check your equipment before starting work.