IT Baseline Protection Manual - The Information Warfare Site

Safeguard Catalogue Infrastucture Remarks
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S 1.14 Automatic drainage
Initiation responsibility: Project planner; agency/company
management
Implementation responsibility: Construction supervisor; Head of Site/Bldg
Technical Service
All areas where water can gather and accumulate, or where running water or
stagnant water is discovered belatedly or not at all, and where water can cause
damage, should be provided with automatic drainage and possibly with water
detectors. Such areas include:
- basement,
- free spaces under false (raised) floors,
- light shafts,
- heating system.
In case of passive drainage, i.e. through floor drains leading directly into the
sewerage system of the building, backflow valves are indispensable. Without
such flaps, this type of drain becomes a water inlet whenever the sewage
system is overloaded. After very heavy rainfall, it will, in the majority of
cases, be through this system that water leaks into the basement. The operation
of the backflow valves must be examined at regular intervals.
If passive drainage is not possible because the level of the sewage system is
too high or because the normal hydraulic pressure is insufficient, use may be
made of pumps which are automatically activated by float switches or water
sensors. When such technology is used, the following points must be
particularly observed:
- The pump throughput must be of sufficient size.
- The hydraulic main of the pump must be provided with a backflow valve.
- Provisions must be made against the pump being blocked by entrained
objects (suction filter etc.).
- Start-up of the pump should be automatically indicated (e.g. to the janitor
of the Site/Building Technical Service).
- The functioning of the pump and the switches must be regularly tested.
- The hydraulic main of the pump must not be connected to a sewage pipe
run in the immediate vicinity. If such a pipe had a leak, the water would
only be pumped in a circle.
Additional controls:
- Have the rooms exposed to water risks been provided with automatic
drainage?
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IT-Baseline Protection Manual: Oktober 2000