HYDROGEN SULFIDE IN A COLLECTION SYSTEM: WHAT WE SHOULD KNOW AND DO TO PREVENT HUMAN INJURY AND SEWER ASSET DETERIORATION

摘要

A sewer worker enters a manhole for one more look late in the day, just to check one final thing. He does this without an entry permit, a harness and tri-pod or a safety person on the surface. His co-workers, not knowing what he is doing, miss him. They look in the manhole and he is not there. He is found an hour or so later, dead at the sewage treatment plant.