Missouri Code of State Regulations › Title 10 - DEPARTMENT OF NATURAL RESOURCES › Division 20 - Clean Water Commission › Chapter 9 - Treatment Plant Operations › Section 10 CSR 20-9.010 - Wastewater Treatment Systems Operation Scope Monitoring

Current through Register Vol. 49, No. 14, July 15, 2024
PURPOSE: The amendment will revise minimum
				  operational monitoring requirements for wastewater treatment facilities to
				  include technologies that are not reflected in the current
				  rules.
(1) Definitions.
				Definitions as set forth in the Missouri Clean Water Law and
				10 CSR
				20-2.010 apply to the terms to be used in this rule,
				unless the context clearly requires otherwise.
(2) Operational laboratory tests and related
				monitoring for waste-water treatment systems control are a supplement to the
				Missouri State Operating Permit (MSOP) requirements. These operational
				monitoring reports shall be submitted to the department along with the MSOP
				discharge monitoring reports.
(3)
				The department may modify monitoring frequency required in this rule based upon
				the department's judgement of monitoring needs for process control at a
				specified facility.
(4) These
				requirements for laboratory tests shall apply to all waste- water treatment
				systems owned or operated by or for municipalities, public sewer districts, or
				other local government entities, private sewer companies regulated by the
				Public Service Commission, and the state agencies or any subdivision of them,
				with a population equivalent, as defined in
				10 CSR
				20-9.020, greater than two hundred (200). All other
				systems are exempt.
(5) Minimum
				monitoring requirements to ensure adequate waste-water treatment systems
				in-plant operational control are as follows:
(A) Lagoons
1. Discharging - Two (2)/Week Frequency.
Precipitation
Flow
Influent or Effluent
pH
Primary Cell
D.O.
Primary Cell
2. Non-Discharging - Two (2)/Month Frequency.
Precipitation
Flow
Influent or Effluent
pH
Primary Cell
D.O.
Primary Cell
(B)
				Mechanical Plants.
1. All types-daily (Monday
				- Friday) frequency.
Precipitation
Flow
Influent or Effluent
pH
Influent
Temperature
Aeration basin
2.
				Additional laboratory test requirements for wastewater activated sludge
				processes and modifications:
Influent
Mixed Liquor
TSS
1/week
1/week
Settleability
Daily (Monday - Friday) (sample contact and
							 reaeration basins for contact stabilization)
D.O.
Daily (Monday - Friday) (sample contact and
							 reaeration basins for contact stabilization)
Temperature
Daily (Monday - Friday) (sample contact and
							 reaeration basins for contact stabilization)
3.
				Additional tests for facilities having digesters:
Anaerobic
Aerobic
pH
Daily (Monday - Friday)
-
Temperature
Daily (Monday - Friday)
-
D.O.
-
Daily (Monday - Friday)
(C) Recirculating filter media beds:
Pressure 2/year by measuring squirt height in each zone at
				  the orifice furthest from the pump. Use each pump independently during the
				  monitoring to ensure each pump is functioning.
(D) Facilities which chlorinate for disinfection shall
				perform total chlorine residual analyses of the effluent on a daily (Monday -
				Friday) basis during those periods when chlorination facilities are in
				use.
(E) Facilities employing
				disinfection technology other than chlorine shall have disinfection process
				control testing parameters and frequency determined by the department on a
				case-by-case basis.