5.2.2
The water used by the firewater system, whether for
fire-fighting training or in the event of genuine emergencies
is typically collected by the sites hard-standing areas
stormwater-collection underground pipework. Rainfall on
site also enters this system and passes through the sites
oil/silt separator to remove contaminants prior to entering
the WWTP mixing chamber. The outlet from this chamber is
discharged from site to a municipal industrial waste collection
system, again metred as it exits the site (F2) for invoicing
purposes.