Regulation 9 Monitoring
Where a potential risk to, or via, the aquatic environment from acute exposure to one of the substances listed in Table 47 of Part 2 of Schedule 1 has been identified as a result of measured or estimated environmental concentrations or emissions, and where a biota or sediment environmental quality standard is being applied, the Department must—
(a)
monitor the surface water; and
(b)
where such environmental quality standards have been established, apply the MAC-EQS laid down in that Table.