R 408.14495 Chlorine, caustic and acid.

Rule 4495. (1) Liquid chlorine shall be stored in an unoccupied ventilated room. The exhaust pickup shall be at floor level. (2) A room used for storage of chlorine gas shall have not less than 2 exits. (3) A tank car containing chlorine and connected to a pipe or hose line shall be protected by a derail device and a blue flag. (4) A pipe or hose line carrying chlorine, caustic oR acid shall be identified by a sign or color label. (5) Where chlorine is piped through a wall, shut-off valves shall be located on both sides of the wall and at the inlet and outlet.