When you are
going to undertake any sort of work which involves excavation or digging, it is
essential to take every precaution possible in order to avoid striking one of
the many services that run underground. There are a lot of different services
that can run underground, but the main ones are electricity, water, sewage, and
gas. Striking any one of those can be serious and result in severe injury and
in some cases death. There are also telecoms which are unlikely to cause
injury, but which could still cause serious disruption.
This is why it
is necessary to undertake a full survey of the area in which you are going to
excavate before so much as putting a fork or spade in the ground. The first
thing to do is to contact the utilities in the area and get the plans. However,
these must only ever be used as a guide. They may not be complete. They may not
be accurate, Furthermore, there may be no plans available.
Any surveyor
endeavouring to locate underground services needs to make use of the CAT and
Genny. A surveyor must also understand how to use them in combination and in
all modes in order to be as accurate as possible, but also needs to understand
their limitations. They do have certain limitations.
For instance, it
is possible for them to give a negative reading when there is, in fact,
something there. Depending on the machine being used, some will only give a
reading to a certain depth. That means that you could think there is nothing
there when there actually is, but it is deeper than the machine can read.
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