Missouri Code of State Regulations › Title 10 - DEPARTMENT OF NATURAL RESOURCES › Division 60 - Safe Drinking Water Commission › Chapter 4 - Contaminant Levels and Monitoring › Section 10 CSR 60-4.080 - Operational Monitoring

Current through Register Vol. 49, No. 14, July 15, 2024
PURPOSE: The amendment removes the Editor's Note for
				  documents incorporated by reference, reduces some monitoring frequency
				  requirements for public water systems and removes language that is redundant of
				  section 640.120.5, RSMo.
PUBLISHER'S NOTE: The secretary of state has
				  determined that the publication of the entire text of the material which is
				  incorporated by reference as a portion of this rule would be unduly cumbersome
				  or expensive. This material as incorporated by reference in this rule shall be
				  maintained by the agency at its headquarters and shall be made available to the
				  public for inspection and copying at no more than the actual cost of
				  reproduction. This note applies only to the reference material. The entire text
				  of the rule is printed here.
(1) Public water systems utilizing any
				treatment process must perform sufficient analyses to maintain control of the
				treatment process, using methods as required by
				10 CSR
				60-5.010 and as acceptable to the
				department.
(2) Automatic
				instrumentation may be used if properly installed, maintained and periodically
				calibrated against known standards prepared in accordance with Standard Methods
				for the Examination of Water and Wastewater 1992, 18th edition, or Methods for
				Chemical Analysis of Water and Wastes, published in March 1983 by the
				Environmental Protection Agency's (MCAWW, Section 9.3, EPA/600/479/020,
				Cincinnati, OH). This document is incorporated by reference without any later
				amendments or modifications. To obtain a copy, contact the U.S. Government
				Printing Office at 732 North Capitol Street N W, Washington, D.C., 20401, toll
				free at (866)512-1800 or by visiting
https://bookstore.gpo.gov
.
(3) Sufficient analyses must be done to
				assure control of water quality, the following requirements notwithstanding.
				Continuous monitoring and recording may be used for any operational analysis
				instead of grab sampling provided that the requirements of section (2) are met.
				For those analyses where continuous monitoring is required, if there is a
				failure in the continuous monitoring equipment, grab sampling every four (4)
				hours of operation may be conducted in lieu of continuous monitoring but for no
				more than five (5) working days following the failure of the equipment.
				Applicable analyses and testing frequencies are as follows:
Test
Frequency
Sample Location
Treatment
Treatment
Treatment
Treatment
Alkalinity
As necessary for control
Raw Water
Clarification
Lime Softening
Alkalinity
As necessary for control
Entry to distribution system
Clarification
Lime Softening
Disinfection residual (1)
Continuous
Entry to distribution system
Disinfection residual (2)
Daily
Entry to distribution system
Disinfection residual (3)
At time of total coliform sampling
Total coliform sampling points
Disinfection residual (4)
Monday-Friday, excluding federal holidays and days
							 not serving water to the public
Entry to distribution system
Disinfection residual
Start up and every 2 hours of operation
Filter influent and effluent
Clarification
Lime softening
Fluoride (if compounds added)
Daily
Entry to distribution system
Fluoride adjustment
Fluoride (if compounds added)
Quarterly
Representative point in distribution system
Fluoride adjustment
Hardness (5)
Monday-Friday, excluding federal holidays and days
							 not serving water to the public
Entry to distribution system
Ion Exchange softening
Hardness
Daily
Entry to distribution system
Clarification
Lime Softening
Hardness
As necessary for control
Ion Exchange softening
Iron
As necessary for control
Filter influent and effluent
Iron removal
Clarification
Lime softening
pH
As necessary for control
Entry to distribution system
Iron removal
Clarification
Lime softening
pH
As necessary for control
Raw water
Clarification
pH
As necessary for control
Filter effluent
Iron removal
pH
As necessary for control
Primary and secondary basins
Lime softening
pH(7)
As necessary for control
Entry to distribution system
Phosphate (6)
As necessary for control
Downstream from point of application
Sludge Concentration
(9)
As necessary for control
Center cone and sludge blowoff and sample taps
Clarification
Lime softening
Temperature
(7)
As necessary for control
Entry to distribution system
Disinfection
Iron removal
Clarification
Lime softening
Turbidity(8)
Every four (4) hours
Combined filter effluent
Turbidity (8)
continuously
Individual filter effluent
Turbidity
As necessary for control
Entry point to distribution and filter
							 influent
Iron removal
Clarification
Lime softening
(1) Surface
				water and Groundwater under the Direct influence of surface water and
				compliance monitoring systems under
				10 CSR
				60-4.025 serving >3,300 population.
(2) Surface water, ground water under the
				direct influence of surface water and compliance monitoring systems under
				10 CSR
				60-4.025 serving <3,300 population. Lime softening,
				iron removal and systems directed by a compliance agreement to
				disinfect.
(3) All public water
				systems that add a chlorine disinfectant or that deliver water that has a
				chlorine disinfectant.
(4) Systems
				not required to disinfect. This excludes Surface water. Ground water under the
				direct influence of surface water, compliance monitoring systems under
				10 CSR
				60-4.025, lime softening, iron removal and systems
				directed by a compliance agreement to disinfect. An alternate frequency may be
				agreed upon in writing by the water system and the department, if
				warranted.
(5) If ion exchange
				softening is required of water system to meet national primary drinking water
				standards (ie. lead, radionuclides).
(6) If phosphate compounds are added to the
				water.
(7) Surface water and
				Groundwater under the Direct influence of surface water and compliance
				monitoring systems under
				10 CSR
				60-4.025.
(8) Surface water and Groundwater under the
				Direct influence of surface water.
(9) For facilities utilizing solids contact
				basins.