La. Admin. Code tit. 51 § XII-201

Current through Register Vol. 50, No. 11, November 20, 2024

Section XII-201 - General Requirements

A. General. Chemicals applied to treat potable drinking water shall meet the requirements of NSF/ANSI Standard 60 as certified by an ANSI-accredited testing agency.

B. Plans and Specifications. Plans and specifications shall be submitted for review and approval, as provided for in Chapter 1, Subchapter A of this Part, and shall include:

1. descriptions of feed equipment, including maximum and minimum feed ranges;

2. location of feeders, piping layout and points of application;

3. storage and handling facilities;

4. operating and control procedures including proposed application rates;

5. description of testing equipment; and

6. description of system including all tanks with capacities, (with drains, overflows, and vents), feeders, transfer pumps, connecting piping, valves, points of application, backflow prevention devices, air gaps, secondary containment, and safety eye washes and showers.

C. Chemical Application. Chemicals shall be applied to the water at such points and by such means as to:

1. assure maximum efficiency of treatment;

2. assure maximum safety to consumer;

3. provide maximum safety to operators;

4. assure satisfactory mixing of the chemicals with the water;

5. provide maximum flexibility of operation through various points of application, when appropriate; and

6. prevent backflow or back-siphonage between multiple points of feed through common manifolds.

D. General equipment design shall be such that:

1. feeders will be able to supply, at all times, the necessary amounts of chemicals at an accurate rate, throughout the range of feed;

2. chemical-contact materials and surfaces are resistant to the aggressiveness of the chemical solution;

3. corrosive chemicals are introduced in such a manner as to minimize potential for corrosion;

4. chemicals that are incompatible are not stored or handled together;

5. all chemicals are conducted from the feeder to the point of application in separate conduits;

6. chemical feeders are as near as practical to the feed point;

7. chemical feeders and pumps shall operate at no lower than 20 percent of the feed range unless two fully independent adjustment mechanisms such as pump pulse rate and stroke length are fitted then the pump shall operate at no lower than 10 percent of the rated maximum; and

8. gravity may be used where practical.

E. For each chemical the information submitted shall include:

1. documentation that the chemical is certified to NSF/ANSI Standard 60;

2. specifications for the chemical to be used;

3. purpose of the chemical;

4. proposed minimum non-zero, average and maximum dosages, solution strength or purity (as applicable), and specific gravity or bulk density;

5. method for independent calculation of amount fed daily; and

6. safety data sheet (SDS).

La. Admin. Code tit. 51, § XII-201

Promulgated by the Department of Health, Office of Public Health, LR 44328 (2/1/2018), effective 8/1/2018.

AUTHORITY NOTE: Promulgated in accordance with the provisions of R.S. 40:4.A.(8), 40:4.13.D.(1)(2) and 40:5.A.(2)(3)(5)(6)(7)(17).