Louisiana Administrative Code › Title 51 - PUBLIC HEALTH-SANITARY CODE › Part XII - Water Supplies › Chapter 2 - Public Water System Construction, Operation and Maintenance › Subchapter A - Chemical Application › Section XII-209 - Specific Chemicals

Current through Register Vol. 50, No. 6, June 20, 2024
A.
				  Chlorine Gas. Chlorinators should be housed in a room separate from but
				  adjacent to the chlorine storage room.
1.
				  Chlorinator rooms should be heated to 60°F, and be protected from excessive
				  heat. Cylinders and gas lines should be protected from temperatures above that
				  of the feed equipment.
2. Both the
				  chlorine gas feed and storage rooms should be located in a corner of the
				  building on the prevailing downwind side of the building and be away from
				  entrances, windows, louvers, walkways, etc.
3. If chlorine gas feed and storage is
				  enclosed, the chlorine gas shall be separated from other operating areas. Both
				  the feed and storage rooms shall be constructed so as to meet the following
				  requirements:
a. a shatter resistant
				  inspection window shall be installed in an interior wall unless secondary
				  containment is provided for chlorine gas;
b. all openings between the rooms and the
				  remainder of the plant shall be sealed;
c. doors shall be equipped with panic
				  hardware, assuring ready means of exit and opening outward only to the building
				  exterior;
d. a ventilating fan with
				  a capacity to complete one air change per minute when the room is occupied;
				  where this is not appropriate due to the size of the room, a lesser rate may be
				  considered;
e. the ventilating fan
				  shall take suction near the floor and as great a distance as is practical from
				  the door and air inlet, with the point of discharge located so as not to
				  contaminate air inlets to any rooms or structures;
f. air inlets with corrosion resistant
				  louvers shall be installed near the ceiling;
g. air intake and exhaust louvers shall
				  facilitate airtight closure;
h.
				  separate switches for the ventilating fan and for the lights shall be located
				  outside and at the inspection window. Outside switches must be protected from
				  vandalism. A signal light indicating ventilating fan operation shall be
				  provided at each entrance when the fan can be controlled from more than one
				  point;
i. vents from chlorinator
				  and storage areas must be screened and discharge to the outside atmosphere,
				  above grade;
j. floor drains are
				  discouraged. Where provided, the floor drains must discharge to the outside of
				  the building and not be connected to other internal or external drainage
				  systems; and
k. provisions should
				  be made to chemically neutralize chlorine gas where feed and/or storage is
				  located near residential or developed areas in the event of any measured
				  chlorine release. The equipment must be sized to treat the entire contents of
				  the largest storage container on site.
4. Chlorine gas not stored in a room shall
				  be:
a. protected from direct sunlight and
				  windblown debris;
b. shielded from
				  public view;
c. located inside a
				  fenced and secure area;
d. secured
				  in a fixed position, and
e. all
				  chlorine pipelines shall be under vacuum with no pressure chlorine lines
				  allowed.
5. Chlorine gas
				  feed systems shall be of the vacuum type and include the following.
a. vacuum regulators on all individual
				  cylinders in service; and
b.
				  service water to injectors/eductors shall be of adequate supply and pressure to
				  operate feed equipment within the needed chlorine dosage range for the proposed
				  system.
6. Pressurized
				  chlorine feed lines shall not carry chlorine gas beyond the chlorinator
				  room.
7. Full and empty cylinders
				  of chlorine gas shall meet the following requirements:
a. housed only in the chlorine storage room
				  or designated area conforming with §209. A.4 of this Part;
b. isolated from operating areas;
c. restrained in position;
d. stored in locked and/or secure rooms
				  separate from ammonia storage; and
e. protected from direct sunlight or exposure
				  to excessive heat.