Where workers are employed near open tanks that hold harmful substances, the tank sides rise at least 900 mm above the platform workers stand on, or a standard handrail is fitted; no burning, welding or similar hot work is done on a vessel that contained a highly combustible substance until it is thoroughly cleaned and tested safe; no worker goes into a tank, vessel or chamber where toxic fumes or gases may be present until the air is confirmed sufficiently pure, with approved air-supplied respirators and lifelines stationed at the entrance in doubtful cases; and electrical illumination and flashlights used in such work meet section 40.4.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.