Firefighting water
Firefighting water is: ‘Water used to cool, extinguish or prevent the spread of fire during an incident. It is likely to become contaminated with product and firefighting foam as a consequence of its use in firefighting activities. Water that is used solely to cool storage tanks water sprays or deluge systems (often described as cooling water) is less likely to become contaminated with product.’
Ref Containment systems for the prevention of pollution, Secondary, tertiary and other measures for industrial and commercial premises (CIRIA C736), published by CIRIA in 2014.
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