Mo. Code Regs. tit. 10 § 60-4.080

Current through Register Vol. 49, No. 23, December 2, 2024

Section 10 CSR 60-4.080 - Operational Monitoring

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.

(4) If, after investigation, the department finds that any public water system is incompetently supervised, improperly operated, inadequate, of defective design or if the water fails to meet standards established in these rules, the water supplier must implement changes that may be required by the department.

(5) Every supplier of water to a public water system must disinfect all newly constructed or repaired water distribution mains, finished water storage facilities or wells by methods acceptable to the department before being placed in or returned to service.

(6) All finished water reservoirs must be covered by a permanent, protective material, adequately vented with properly screened openings.

(7) Chemicals, materials and protective coatings used in public water systems must be acceptable to the department.

(8) Public water systems must maintain a minimum positive pressure of twenty pounds per square inch (20 psi) throughout the distribution system under all normal operating conditions.

(9) A supplier of water that adds fluoride to the water system must submit one (1) sample per quarter for analyses to an approved laboratory.

10 CSR 60-4.080

AUTHORITY: section 640.100, RSMo 1994.* Original rule filed May 4, 1979, effective 9/14/1979. Amended: Filed April 14, 1981, effective Oct. 11, 1981. Amended: Filed July 12, 1991, effective 2/6/1992. Amended: Filed Feb. 1, 1996, effective 10/30/1996.

Amended by Missouri Register January 2, 2019/Volume 44, Number 1, effective 2/28/2019

The following material is incorporated into this rule by reference:

1) Methods for Chemical Analysis of Water and Wastes, Revised March 1983 (Springfield VA: U.S. Department of Commerce, 1983);

2) Standard Methods for the Examination of Water and Wastewater, 18th Edition (Baltimore, MD, Victor Graphics, Inc., 1992).

In accordance with section 536.013(4), RSMo, the full text of material incorporated by reference will be made available to any interested person at the Office of the Secretary of State and the headquarters of the adopting state agency.

*Original authority: 640.100, RSMo 1939, amended 1978, 1981, 1982, 1988, 1989, 1992, 1993, 1995.