PURPOSE: This rule outlines the requirements for wastewater systems regarding certified personnel.

1. (1) Definitions. Definitions as set forth in the Missouri Clean Water Law and 10 CSR 20- 2.010 shall apply to those terms when used in this rule, unless the context clearly requires otherwise or as noted in the subsections of this rule.

   1. (A) Wastewater treatment systems. Interrelated or interconnected facilities, equipment, machinery, sewers, piping, valves, land, tanks, basins, ponds, lagoons, and any other device, method and process used to reduce or eliminate the contaminants in sewage and water-borne wastes.
   2. (B) Operator. Any individual who operates or determines the method of operating a wastewater treatment system, either directly or by order.
   3. (C) Supervisor. An operator who directs or who has the authority to direct other individuals, or an operator in direct responsible charge for the operation of a wastewater treatment system, including superintendent, foreman, crew chief and shift supervisor.
   4. (D) Population equivalent (P.E.). The calculated population which normally contributes the same amount of biochemical oxygen demand (BOD5) per day. The common base is 0.17 pounds of five (5)-day BOD5 per capita per day. The calculated population which normally contributes the same amount of flow per day. The common base is one hundred (100) gallons per capita per day.

2. (2) Wastewater Treatment Systems Requirements.

   1. (A) Requirements for operation by certified personnel shall apply to all wastewater treatment systems, serving population equivalents greater than two hundred (200) or with fifty (50) or more service connections, owned or operated by or for municipalities, public sewer districts, counties, public water supply districts, private sewer companies regulated by the Public Service Commission and the state or federal agencies. All other systems are exempt from this rule unless the department determines that certified personnel are necessary to protect the waters of the state.
   2. (B) Owners or other persons legally responsible for the operation of wastewater treatment systems subject to this rule shall be responsible for assuring that operators and supervisors of wastewater treatment systems comply with certification requirements as set forth in this rule.
   3. (C) All operators of wastewater treatment systems included in subsection (2)(A) of this rule shall possess, as a minimum, a level D certificate of competency issued by the department.
   4. (D) Minimum certification of competency classification requirements for supervisors of wastewater treatment systems shall be determined by the department using the following point system as a guide:

CLASSIFICATION OF WASTEWATER TREATMENT PLANTS

Certification Level D C B A Range of Points 25 and 71 and less 26-50 51-70 greater Assign points for every item that applies: Size Item Maximum population equivalent (P.E.) served, peak day

Maximum: 10 points Design flow (avg. day) or peak month’s flow, (avg. day) whichever is larger

Maximum: 10 points Effluent Discharge Receiving Water Sensitivity Missouri or Mississippi River

All other stream discharges except to losing streams and stream reaches supporting whole body contact recreation

Discharge to lake or reservoir outside of designated whole body contact recreational area

Discharge to losing stream, or stream, lake or reservoir area supporting whole body contact recreation

Direct reuse or recycle of effluent

Land Disposal— Low rate

High rate

Overland flow

Variation in Raw Wastes (highest level only)

Variations do not exceed those normally or typically expected

Recurring deviations or excessive variations of 100 to 200 percent in strength and/or flow Recurring deviations or excessive variations of more than 200 percent in strength and/or flow

Raw wastes subject to toxic waste discharges

Preliminary Treatment Screening and/or comminution

Grit removal Points 1 pt. per 10,000 P.E. or major fraction thereof.

1 pt. per MGD or major fraction thereof. Size Item Points Plant pumping of main flow

Primary Treatment Primary clarifiers

Combined sedimentation/digestion

Chemical addition (except chlorine, enzymes)

Secondary treatment Trickling filter and other fixed film media with secondary clarifiers

Activated sludge with secondary clarifiers (including extended aeration and oxidation ditches)

Stabilization ponds without aeration

Aerated lagoon

Advanced Waste Treatment Polishing pond

Chemical/physical—without secondary

Chemical/physical—following secondary

Biological or chemical/biological

Carbon regeneration

Solids Handling Thickening

Anaerobic digestion

Aerobic digestion

Evaporative sludge drying

Mechanical dewatering

Solids reduction (incineration, wet oxidation)

Land application

Disinfection Chlorination or comparable

On-site generation of disinfectant (except ultraviolet light)

Dechlorination Size Item Points Ultraviolet light 4

Required Laboratory Control Performed by plant personnel (highest level only) Lab work done outside the plant 0

Push-button or visual methods for simple tests such as pH, settleable solids 3

Additional procedures such as DO, COD, BOD, titrations, solids, volatile content 5

More advanced determinations such as BOD seeding procedure, fecal coliform, nutrients, total oils, phenols, etc. 7

Highly sophisticated instrumentation, such as atomic absorption and gas chromatograph 10 TOTAL* *If unique treatment plant conditions distort the point total, the department may adjust the facility classification.

1. (E) The owners of wastewater treatment systems shall furnish the department, upon request, the names, addresses and positions of all employees who are operators or supervisors of wastewater treatment systems.
2. (F) In the event a facility’s staff does not meet the certification requirements of this rule, the facility owner shall notify the department in writing within ten (10) days of occurrence. Following consultation with the facility owner, the department shall establish a schedule of activities including the date by which compliance with this rule shall be obtained.

1. (3) Penalties. Penalties for violation of this rule shall be as provided in the Missouri Clean Water Law.
2. (4) Severance. If a section, subsection, paragraph, subparagraph, part, subpart, item or subitem of these rules or any part of them be declared unconstitutional or invalid for any reason, the remainder of these rules shall not be affected and shall remain in full force and effect.
3. (5) Effective Date. This rule becomes effective immediately upon adoption and compliance with the requirements of section 644.036.3. of the Missouri Clean Water Law and Chapter 536, RSMo (Cum. Supp. 1989).

AUTHORITY: section 644.026, RSMo 1994.* Original rule filed July 15, 1976, effective March 1, 1977. Rescinded and readopted: Filed Nov. 1, 1983, effective July 1, 1984. Rescinded and readopted: Filed July 15, 1991, effective March 1, 1992. *Original authority 1972, amended 1973, 1987, 1993.