is responsible for performing skilled work in the operation and maintenance of a water/wastewater treatment facility on an assigned... principles and safety practices of wastewater or water distribution, pumping, collection, and treatment, each as they may...
is responsible for performing skilled work in the operation and maintenance of a water/wastewater treatment facility on an assigned... principles and safety practices of wastewater or water distribution, pumping, collection, and treatment, each as they may...