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33
(a) lst-Class Swim
Length 120 ft. Width 40 ft. Capacity 157,000
gallons.
(b) 2nd-Class Swim
Length 144 ft. Width 35 ft. Capacity 164,898
gallons.
(c) Small Swim
Length 60 ft. Width 25 ft. Capacity 49,000
gallons.
Method of Treatment
Filtration through sand filters installed by Paterson Engineering
Co. in 1935. Breakpoint Chlorination with Chlorine Gas Plants.
Frequency of Change
3½ hour turnover on each Pool.
Source of Supply
Metropolitan Water Board.
21 bath samples were analysed by the Public Analyst. It is standard
practice to record the number of bathers who have used the bath
prior to the sample being taken and the number of bathers in the pool
at the time of sampling, and the appearance of the water. In 19 cases,
the appearance was clear and as regards the other two, the baths were
being used by an unusually large number of bathers, when the appearance
was slightly cloudy. The analyses, however, revealed bacterial counts
of under 5 and free chlorine 1-5 p.p.m. and 3 p.p.m. respectively.
Bacteriological Examination
(a) Bacillus coli - Not found in 50 mls. - 21
(b) Number of bacteria per ml.
No growth - 5
Under 5 - 12
Under 10 - 2
15 - 1
150 - 1