257 CMR, § 2.11
Assistant Chief Operator - Grade 1-4 facilities. The person in direct responsible charge during the absence of the Chief Operator. Certification required for this position may be one grade below the grade of the plant.
Assistant Chief Operator - Grade 5, 6, and 7 facilities. The person in direct responsible charge during the absence of the chief operator. Certification required is equal to the grade of the plant.
Chief Operator - In all plants, the person in overall direct responsible charge of the wastewater treatment facility at all times. The certification required for this position is equal to the grade of the plant.
Shift Operator - In all plants, the person in direct responsible charge of a particular shift at a wastewater treatment facility. The certification required for this position is based upon the job duties and responsibilities assigned and determined by the points accrued on one's particular shift. Total points shall not include those for laboratory and BOD, or other units not in operation on the assigned shift.
Weekend Operator - The person in direct responsible charge of the weekend operation of a wastewater treatment facility. The certification required for this position is based upon the job duties and responsibilities assigned and determined by the points accrued on one's particular weekend shift. Total points shall not include those for laboratory and BOD or units not operational on weekends.
257 CMR, § 2.11