Possesses knowledge of sampling methods and the physical and chemical tests used in treatment plant control, hazards and safety practices involved in working around high voltage equipment and moving machinery, process quality control requirements and remedial measures in dealing with process malfunctions and emergencies, at a level expected of a State of Hawaii Grade IV WWTP or Grade II WTP Operator. Possesses knowledge of the practices and procedures used in the operation and maintenance of wastewater treatment and pumping plant equipment and the various types of wastewaters and associated problems and processes at a level expected of a State of Hawaii Grade IV WWTP or Grade II WTP Operator.