Section 7076 - (4-50) (11-53). Fire and Safety Diagram(a) A diagram of the mine shall be provided showing the location of: (8) Water and air lines available for fighting fire(12) Direction of air flow(b) The diagram shall be brought up to date at least once every six months. It need not show boundary lines, outlines of ore bodies, or other details not essential for the safety of employees.(c) Easily legible copies of the fire and safety diagram shall be kept posted on the surface near the mine entrance most frequently used by the men and at every working station in the mine.Cal. Code Regs. Tit. 8, § 7076