Section 7959 Of Chapter 1. Tunnels And Mines From California Labor Code >> Division 5. >> Part 9. >> Chapter 1.
7959
. Rescue crews shall be familiar with all emergency equipment
necessary to effect a rescue or search for missing employees in case
of an accident or explosion. Such rescue crews shall hold practices
with equipment and using emergency rescue plan procedures at least
once monthly during construction or operation of the tunnel or
underground mines. At least one rescue crew shall be maintained above
ground at all times and within 30 minutes travel of the tunnel or
underground mine site classified as gassy or extrahazardous.