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Sec. 31-30. Same—Tests for excess chlorine.

At any pool where chlorine or hypochlorite of lime or other
chlorine compound is used for disinfection, the operator must
be supplied with a proper outfit for making the orthotolidine
test for excess chlorine and with permanent standards showing
maximum and minimum permissible chlorine in the water.
Tests for excess chlorine in the water must be made by the
operator every day that the pool is in use. (Code 1959, § 3130.)