As a certified Group 1 wastewater treatment plant operator, operates and maintains a Class 1 wastewater treatment plant at an institution or serves as a backup for a Wastewater Treatment Plant Operator 2.

Operates, adjusts and regulates chemical feed machines, chlorinators, sludge digestion pumps, and flow meters; breaks up sludge in gas chambers;

Makes prescribed tests such as tests for hydrogen-ion concentrates, oxygen demand and settlable solids;

Cleans bar screens and filter beds; cleans grit from grit chamber; washes down tanks and chambers;

Records gauge and meter readings; keeps operational records;

Lubricates and maintains motors, pumps and heat exchangers;

Maintains buildings and adjacent grounds;

Supervises and instructs helpers, patients or residents;

Performs other work as required.

Knowledge of: principles of operation and maintenance requirements of sewage treatment plant machinery and equipment; chemical and physical tests required for safe and efficient operation of sewage treatment plant; tools and equipment used in maintaining sewage treatment plant equipment.

Ability to: make accurate readings; keep operation records; establish and maintain cooperative working relationships with others.

Incumbents in some positions in this class will be required to obtain and maintain a Water Distribution Manager 2 Certificate of Competency issued by the Department of Health. This Certificate of Competency is required by the Safe Drinking Water Act.

Persons legally authorized to work in the U.S. under federal law, including Deferred Action for Childhood Arrivals recipients, are eligible for employment unless prohibited by other state or federal law.

Certification by Department of Ecology as a Group 1 wastewater treatment plant operator.

Note: Classification of the wastewater treatment plant will be determined by the Department of Ecology.

Revise class. Revises title (formerly Sewage Plant Operator), definition, minimum qualifications; adopted May 21, 1973.
Revise class. Revises minimum qualifications; adopted February 17, 1978.
Revise class. Revises minimum qualifications; adopted February 10, 1989.
Revise class. Revises title (formerly Waste Treatment Plant Operator 1), definition, minimum qualifications; adopted June 10, 1999.
Revise class. Revises class code (formerly 75400), general revision; adopted May 10, 2007, effective July 1, 2007.

Revised Legal Requirements; effective June 6, 2024, due to adopted legislative action.