Sewers Flashcards
Comms could be difficult in sewer incidents, what control measures may help over come these?
Runners both above and below ground
Maintain line of sight where possible
Consider line comms (carried by TRU)
What is active monitoring?
where personnel use portable detectors, often attached to themselves to monitor the atmosphere they are currently exposed to
What type of information could water company workers have that would be of benefit?
Atmospheric conditions inside the sewer (gas monitoring equipment in use)
Sewage or water levels in sewer
Rate of flow
Local knowledge of direction of sewers
Vertical ladder may provide access to the sewer. What depth could they be up to?
48m
Where should containment equipment such as hose lines be cleaned?
Flash flooding can occur in a sewerage system. This can be caused by what?
Localised flooding of surface water systems
Increases in temperature producing melt water run off
Remote rainfall within the catchment area of the sewer or drain or isolated rainfall upstream of the sewer catchment area
What is passive monitoring?
used to monitor a specific area, such as portable detectors positioned temporarily in one place or fixed on-site equipment
What are sluice gates?
Sluice gates are physical barriers that are usually operated automatically by fluid pressure or controlled remotely for flood control to prevent backwash
While working in contaminated areas crews should not…
Rub your nose or mouth
Smoke or vape
Consume food and drink while working in probable contaminated areas
The construction and nature of the sewer network may present hazards such as what?
slippery surfaces
poorly maintained access ladders
steeply angled chambers
rapid changes in depth
protrusions and obstructions
There has been structural collapse of a section of sewer where a casualty is suspected. What shouldn’t you do?
Commit FRS personnel without adequate protection from further collapse
