La. Admin. Code tit. 48 § V-1307

Current through Register Vol. 50, No. 9, September 20, 2024

Section V-1307 - System Requirements

A. Detailed plans and specifications for which a fluoridation permit is requested shall be submitted in duplicate, to the Department of Health and Hospitals Office of Public Health's (DHH-OPH) District engineer and the DHH-OPH's fluoridation engineer by the responsible person of the water supply system. Such plans and specifications shall be submitted prior to construction.

B. The following provides minimum requirements as well as additional information to assist in the application for a fluoridation permit and in the preparation of plans and specifications. The review and approval of plans and specifications submitted for the issuance of a permit, shall be made in accordance with the "Recommended Standards for Water Works, 2003 Edition" (aka the "Ten State Standards") plus any additional requirements as set forth in this Subpart. Additional fluoride-related documents which may be used by a community water system as guidance/information purposes may be found in the CDC's Morbidity and Mortality Weekly Report (MMWR) titled "Engineering and Administrative Recommendations for Water Fluoridation, 1995", as amended, and in the American Water Works Association (AWWA) "Water Fluoridation Principles and Practices M4, Fifth Edition", as amended.

1. Three general types of fluoride compounds are approved for fluoridation of water supplies; namely, sodium fluoride, sodium fluorosilicate and fluorosilicic acid. Each has certain advantages and disadvantages, and the type chosen will depend on the characteristics of the water to be treated and the capacity of the supply.

2. The fluoride source material to be used must conform to NSF International/American National Standards Institute (NSF/ANSI) Standard 60-2009 and the applicable AWWA specification, as follows:

a. for sodium fluoride, AWWA Standard B701-99;

b. for sodium fluorosilicate, AWWA Standard B702-99; or

c. for fluorosilicic acid, AWWA Standard B703-00.

3. The fluoridation system shall only operate when a flow of water is detected. If the water supply system serves less than two hundred service connections, a secondary flow-based control device shall be provided as back-up protection.

4. A means of measuring the total amount of water treated daily and the amount of chemical injected within the same time period must be provided. These measurements must be accurate to within 5.0 percent.

5. Fluorosilicic acid shall be stored in the original containers or containers provided for the specific purpose, apart from the other chemicals used in the water treatment process. Bulk storage tanks shall be in secondary containment per LAC 33:IX.Chapter 9.

6. When bulk storage of fluorosilicic acid is provided, a day tank shall be provided. The day tank shall hold no more than a 30 hour supply, as calculated at maximum feed rate. The day tank should be scale mounted, preferably under shelter. If scales are not used, level indication can be used for the calculation of the amount of chemical used provided it is accurate within five percent. Filling of day tanks shall not be automated.

7. A diaphragm-type anti-siphon device shall be installed in the fluoride feed line when a metering pump is used and shall be located at the fluoride injection point. A second diaphragm-type anti-siphon device should be installed immediately downstream of the metering pump's discharge head. These anti-siphon devices shall have a diaphragm that is spring-loaded in the closed position.

8. The following safety equipment shall be required for operators handling the following fluoride compounds:

a. fluorosilicic acid: gauntlet neoprene gloves, a minimum of 12 inches long with cuffs; full face shield and splash-proof safety goggles; and a heavy-duty, acid-proof neoprene apron;

b. sodium fluoride or sodium fluorosilicate: the same safety equipment required under Subparagraph 8.a. of this Subsection for fluorosilicic acid with the exception that the full face shield shall be replaced by a National Institute for Occupational Safety and Health/Mine Safety and Health Administration (NIOSH/MSHA) approved, N-series respirator;

c. for dry chemical systems, an eye wash station should be available and easily accessible; and

d. for acid systems, an eye wash station shall be available along with a safety shower and both shall be easily accessible and connected to an approved potable water supply.

La. Admin. Code tit. 48, § V-1307

Promulgated by the Department of Health and Human Resources, Office of Preventive and Public Health Services, LR 13:246 (April 1987), amended by the Department of Health and Hospitals, Office of Public Health, LR 36:70 (January 2010).

AUTHORITY NOTE: Promulgated in accordance with 45 CFR, Parts 16, 74 and 96; P.L. 97-35, Section 901; 42 USC 2476; and R.S. 40:5.11(G).