Disinfection - Wastewater Operators - page 352

27. Wear SCBA and chemical protective clothing covering face, arms,
and hands before entering an enclosed chlorine area to investigate
a chlorine odor or chlorine leak; follow the two-person rule.
28. Use supplied-air breathing equipment when entering a chlorine
atmosphere. never use canister-type gas masks when entering a
chlorine atmosphere.
29. Be sure that the supplied-air breathing apparatus has been properly
maintained in accordance with the plant's self-contained breathing
apparatus inspection guidelines, as specified in the plant's respira-
tory protection program.
30. Stay upwind from all chlorine leak danger areas unless involved
with making repairs. Look to plant windsocks for wind direction.
31. Roll uncontrollable leaking chlorine cylinders so the chlorine
escapes as a gas, not as a liquid.
32. Stop leaking chlorine cylinders or leaking chlorine equipment (by
closing off valves, if possible) prior to attempting repair.
33. Connect uncontrollable leaking chlorine cylinders to the chlorina-
tion equipment, and feed the maximum chlorine feed rate possible.
34. Keep leaking chlorine cylinders at the plant site. Chlorine cylinders
received at the plant site must be inspected for leaks prior to tak-
ing delivery from the shipper. never ship a leaking chlorine cylinder
back to the supplier after it has been accepted from the shipper (bill
of lading has been signed by plant personnel); instead, repair or
stop the leak first.
35. Keep moisture away from a chlorine leak. never put water onto a
chlorine leak.
36. Call the fire department or rescue squad if a person is incapacitated
by chlorine.
37. Administer CPR (use a barrier mask, if possible) immediately to a
person who has been incapacitated by chlorine.
38. Take shallow rather than deep breaths if exposed to chlorine with-
out the appropriate respiratory protection.
39. Place a person who does not have difficulty breathing and is heav-
ily contaminated with chlorine into a deluge shower. Remove the
person's clothing under the water and flush all body parts that were
exposed to chlorine.
40. Flush eyes contaminated with chlorine with copious quantities of
lukewarm running water for at least 15 minutes.
41. Drink milk if the throat is irritated by chlorine.
42. never store other materials in chlorine cylinder storage areas; sub-
stances such as acetylene and propane are not compatible with
chlorine.
9.2.8 Chlorination Process Calculations
Several calculations are useful in operating a chlorination system.
Many of these calculations are discussed and illustrated in this section.