Regulation 10(2)

SCHEDULE 4 SPECIFIC SUBSTANCES AND PROCESSES FOR WHICH MONITORING IS REQUIRED

Column 1	Column 2
Substance or process	Minimum frequency
Vinyl chloride monomer.	Continuous or in accordance with a procedure approved by the Health and Safety Commission.
Vapour or spray given off from vessels at which an electrolytic chromium process is carried on, except trivalent chromium.	Every 14 days.