31. List three chemicals used to raise pH and three chemicals used to lower pH.
Raise
Lower
a. ________________________
a. _______________________
b. ________________________
b. _______________________
c.
________________________
c. _______________________
32.
The Army generally uses ______________________as a chlorine source.
33.
You are evaluating the maintenance and handling of chlorine gas containers at a
pool site. You observe the following:
Observation 1: Full chlorine gas containers are stored above ground and are firmly
held upright with protective caps in place.
Observation 2: The temperature of the cylinder is higher than the temperature of
the feed lines.
Observation 3: The valve stem to the cylinder valve is opened with a wrench about
8 inches long.
Observation 4: High and low ventilation is provided. The suction point of the
exhaust fan is located near floor level and a 2-minute air change is provided. There
is an inside but no outside fan switch.
Observation 5: Gas masks are present. They are placed outside the chlorine room
door where the operator can easily reach them.
Observation 6: A plan specific to a chlorine emergency has been devised, and pool
personnel are periodically drilled in following the plan.
a. How would you rate observation 1 (satisfactory or unsatisfactory)? What
recommendations would you make, if any?
___________________________________________________________
___________________________________________________________
b. Would you rate observation 2 as satisfactory or unsatisfactory? What
recommendations would you make, if any?
___________________________________________________________
___________________________________________________________
MD0166
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