Cal. LAB § 6327.5

If the division arbitrarily or capriciously fails to take action to prevent or prohibit any conditions or practices in any employment or place of employment which are such that danger exists which could reasonably be expected to cause death or serious physical harm immediately or before the imminence of such danger can be eliminated through other available means, any employee who may be injured by reason of such failure, or the representatives of such employees, may bring an action against the chief of the division in any appropriate court for a writ of mandate to compel the division to prevent or prohibit the condition. Nothing contained in this section shall be deemed to prevent the bringing of a writ of mandate against any appropriate person or entity as may be provided by law.