10 CSR 20-9.020
Classification of Wastewater Treatment Systems
PURPOSE: This rule outlines the requirements for wastewater systems regarding certified personnel.
(1) Definitions. Definitions as set forth in the
Missouri Clean Water Law and 10 CSR 202.010 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.
(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 domestic
wastewater and similar organic water-borne
wastes.
(B) Operator. Any individual who operates
or determines the method of operating a
wastewater treatment system, either directly
or by order.
(C) Chief operator. 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.
(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.
(E) Wastewater Collection System. Any
series of pipes and lift stations to collect,
convey, and equalize wastewater flow to the
wastewater treatment system.
(2) Wastewater Treatment Systems Requirements.
(A) Requirements for operation by certified personnel shall apply to all wastewater
treatment systems, with a population equivalent greater than two hundred (200), 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.
(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
chief operators of wastewater treatment systems comply with certification requirements
as set forth in this rule.
(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. New employees that are not yet
certified wastewater treatment operators cannot make process control decisions and will
be directly supervised by a certified operator
or chief operator.
(D) Minimum certification of competency
classification requirements for chief operators of wastewater treatment systems shall be
determined by the department using the following point system as a guide. Wastewater
treatment systems will remain classified at
the level determined prior to the effective
date of this rule until the facility’s MSOP is
renewed, at which time, the MSOP will
include the facility classification.
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(E) The owner will notify the department
of any change in the identity of the chief
operator within fifteen (15) calendar days.
(F) In the event the chief operator is no
longer available to serve, the owner of the
wastewater treatment system will notify the
department of the vacancy within fifteen (15)
calendar days and appoint an interim operator. The interim operator will be considered
the certified chief operator for the purposes
of complying with 10 CSR 20-9.010 and 10
CSR 20-9.020 on a temporary basis until a
properly certified chief operator is hired. Following consultation with the wastewater system owner, the department will establish a
schedule of activities and a timeline for the
system to have a certified chief operator who
has met all applicable certification requirements.
(G) No person, firm, corporation, municipal corporation or other governmental subdivision or agency may operate a wastewater
system unless the operator of the facility is
duly certified by the department as provided
in 10 CSR 20-9.030 or 10 CSR 20-9.020(F)
except during periods of emergency or disaster.
AUTHORITY: section 644.026, RSMo 2016.*
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. Amended:
Filed June 13, 2018, effective Feb. 28, 2019.
*Original authority: 644.026, RSMo 1972, amended
1973, 1987, 1993, 1995, 2000, 2012, 2014.