312. Precautions regarding liquid materials: No person may enter a confined space where there is a risk of drowning without applying an isolation procedure for the section where the work is taking place or a liquid flow control procedure to prevent the influx or an increase in the level of a liquid.
The procedure to isolate the section or control the flow of liquid may in particular provide for the drainage or the derivation of the liquid, the blocking of pipes or the closing and locking of valves.
O.C. 885-2001, s. 312; 1411-2018O.C. 1411-2018, s. 20111411-2018O.C. 1411-2018, s. 2012; 43-2023O.C. 43-2023, s. 111.