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on the "marginal" principle. The pool water at the Twickenham and Teddington
Pools is turned over once every 6½ hours, whilst that at the Hampton Pool operates on
a 4 hour turnover rate.
Colourmetric tests and water samples at each pool are taken three times daily to
determine free'available/residual chlorine content of the water, the pH values of the
same, and both shallow and deep end water temperatures. Each of the results obtained
are recorded in a standard log-book.
Bacteriological tests of the water at each of the above pools and including Rich'
mond Baths are made monthly and, during the past year 109 samples have been taken,
of which 85 were satisfactory and, whilst the remaining 24 were below the recommended
standard, repeat samples in each case have produced satisfactory results.
Richmond Baths (Indoor and Open Air)
The Richmond Baths Establishment, of a "combination" nature, situated in the
Old Deer Park, Richmond, was opened to the public in August, 1966.
The establishment consists of one main Indoor Pool 110' x 42', water capacity of
210,000 gallons and a turnover rate of 3 hours; one Indoor Learner's pool 42' x 24',
water capacity of 17,000 gallons and a turnover rate of 1½ hours, and an Open Air
pool 110' x 42', water capacity of 160,000 gallons and a turnover rate of 4 hours. The
filtration of all pools' water is through Pre-coat filters, and sterilization is carried out
by chlorine gas treatment on "breakpoint" principle. A system of pool water sampling
and testing is installed and all indications are automatically recorded on graphs. A
plenum heating system is installed and the whole establishment is operated electrically
utilising "off-peak" electricity.
The private baths suite consists of 12 private baths for both ladies and gentlemen
respectively together with the necessary waiting rooms, toilets, etc.
The grounds are landscaped and well laid out and provide some two acres of grass
and banked areas which are available for sunbathing, games, etc."
14. FERTILISERS AND FEEDING STUFFS ACT, 1926
Eighteen samples of fertilisers were taken during the year and the following two
were reported upon by the Agricultural Analyst as being irregular :
Sulphate of Ammonia
The percentage of nitrogen was 0.6 above that stated on the statutory statements
and was in excess of the limit of variation allowed. Although this was not considered
to be to the prejudice of the purchaser the retailer amended the statutory statement
accordingly.
Rose Fertiliser
The percentage of phosphoric acid soluble in water was 1.1 below and the phosphoric
acid insoluble in water 1.9 above that on the statutory statement. It is known
that during storage soluble phosphoric acid can change to the insoluble form, the
process being known as reversion but there is no loss of nutrient, the phosphoric acid
becoming available to the plant when applied to the soil. Under the circumstances as
the purchaser would not be prejudiced no further action was taken.
15. COMMON LODGING HOUSES
There are no common lodging houses in the Borough.
16 HAIRDRESSERS AND BARBERS
At the end of the year 164 hairdressers' premises were registered, and in no case
was it necessary to take legal proceedings for enforcement.
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