Current through Register Vol. 48, No. 39, March 25, 2024
Subpart 1.
General.
The standards in this part apply when compressed gas chlorine
is used. The gas chlorine and chlorinating equipment must be in:
A. a separate, mechanically ventilated room;
or
B. a secure reach-in
enclosure.
Subp. 2.
Rooms.
When a room is used, it must comply with the provisions in
this subpart.
A. The room must be
above grade.
B. A shatter resistant
inspection window must be installed in an interior wall or the door.
C. The room must have a ventilating fan with
a capacity to provide one complete air change per minute when the room is
occupied.
D. Separate switches for
the fan and lights must be located outside the room. Outside switches must be
protected from vandalism. A signal light indicating fan operation must be
provided at each entrance when the fan can be controlled from more than one
point.
E. The ventilating fan must
take suction near the floor as far as 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
must be through louvers or other ventilation openings near the
ceiling.
G. When present, floor
drains must discharge to the outside of the building and must not be connected
to other internal or external drainage systems.
Subp. 3.
Reach-in enclosures.
Reach-in enclosures must be:
A. not over two feet in depth;
B. vandal resistant; and
C. naturally ventilated by means of openings
in the upper and lower parts of the enclosure.
Subp. 4.
Doors.
The door of a room or enclosure must be labeled "DANGER - GAS
CHLORINE" in letters at least four inches high.
Subp. 5.
Seals.
All openings between a chlorine room or enclosure and other
enclosed space must be sealed.
Subp.
6.
Venting.
Vents from feeders and storage rooms or enclosures must
discharge to the outside atmosphere, above grade.
Subp. 7.
Chlorinating equipment.
Chlorinating equipment must be capable of withstanding wear
without developing leaks.
A. All
chlorine cylinders must be anchored to prevent falling over.
B. A valve stem wrench must be maintained on
the chlorine cylinder so the supply can be shut off quickly in an
emergency.
C. The valve protection
hood must be kept in place except when the cylinder is connected to the
system.
D. The chlorine feeding
device must be designed so that during accidents or interruptions of the water
supply, leaking chlorine gas is conducted to the out-of-doors.
E. The chlorinator must be a vacuum-operated
solution-feed type, capable of delivering chlorine at its maximum rate without
releasing chlorine gas to the atmosphere.
F. Pressurized chlorine feedlines must not
carry chlorine gas beyond the chlorinating room.
G. Chlorinators must be designed to prevent
the backflow of water into the chlorine solution container.
Subp. 8.
Respiratory
protection equipment.
Respiratory protection equipment, meeting the requirements of
the National Institute for Occupational Safety and Health (NIOSH) or the United
States Bureau of Mines for chlorine use must be available where chlorine gas is
handled. The respiratory protection equipment must be stored at a convenient
location, in a closed cabinet accessible without a key, but not inside any room
where chlorine is used or stored.
A.
The respirators must use compressed air, have at least a 30-minute capacity,
and be compatible with or exactly the same as the respirators used by the fire
or emergency rescue department responsible for the pool facility, or be a
canister type gas mask with full face mask and replacement canisters
provided.
B. A record of use and
inspection must be kept to ensure that the respirators will be serviceable when
needed.
Subp. 9.
Chlorine leak detection.
A bottle of ammonium hydroxide, 56 percent ammonia solution,
or a comparable solution recommended by the chlorine supplier, must be
available for chlorine leak detection.
A. Where ton chlorine containers are used, an
emergency leak repair kit recommended by the Chlorine Institute, Inc., 2001 "L"
Street NW, Washington, D.C. 20036, must be provided.
B. Where an automatic leak detector is
provided, it must be equipped with both an audible alarm and a visual warning
sign.
Subp. 10.
Trained personnel.
Installation of chlorinator equipment and its operation must
be carried on by and under the supervision of personnel trained by the
manufacturer or supplier for the installation and operation of such
equipment.
Statutory Authority: MS s
144.05;
144.12;
144.123;
145A.02;
157.01