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In the latter part of the year 11 manholes were test baited
during a "vertical block control" treatment.
For a number of years the department has relied principally
on the use of Warfarin as a convenient and very effective poison
for surface treatment, but on the advice of the Ministry its use
has now been extended to sewer treatment by the addition of a
preservative which inhibits mould growth in the poison.
The Council has continued to undertake rodent control at
local schools for The Surrey County Council on a contract basis.
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