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Water Abstraction and Disposal
Drainage Plans
In preparedness for environmental incidents all premises should have drainage plans in place. These must consist of a clear diagram of the site showing layout and access details, along with a schematic representation of the site drainage arrangements.
 
The plan must follow these conventions:
  • Red should be used to mark foul drainage on the plan and blue for surface water drainage. The direction of flow should be clearly indicated with the use of arrows.
  • Off-site discharge points for surface water and trade effluent should be clearly marked along with the location of any soakaways.
  • Identify the sewage treatment works to which sewage and trade effluent discharges, along with the nearest foul sewer pumping station serving the site (the local sewerage provider should have this information).
  • Show any watercourse, spring, borehole or well located within or near the site.