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(ii) Fill-and-empty system—
What criterion used for need of re-fill?
How often re-filled?
Is bath cleansed and scrubbed down, and
washed out when empty?
(iii) Chemicals without filtration—
What chemicals?
What dose?
What criterion for control of dose?
(iv) Continuous filtration—
What is the filter—Pressure Filter
Rapid-gravity Filter
Is filtration continuous when bath being used?
What is the turn-over period?
(Standard for indoor baths not more than
four hours, for outdoor baths allow longer).
What is the speed of filtration?
(Standard 200 gals. per sq. ft. per hour).
Any coagulant added?
Nature and quantity—
Any mechanical control of this added
coagulant?
Is water re-heated?
(Standard temperature for baths 72°F.).
Is water aerated?
How?
At what stage?
3. Chlorination: (Standard to be attained not less than .2
and not more than .5 parts of free chlorine per million
parts of water).
Is the bath water chlorinated?
Is chlorination continuous?
How is chlorination performed?
Any estimation of chlorine content made by staff?
(Standard : Three such readings per day.)
What test do they use?
How often do they use it?
Is a record kept?
Is chloramine used?
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