Welcome to the Periodic Table of the Elements Series.
Oxygen. Oxygen is a Gas at STP (Standard Temperature and Presure). Symbol for Oxygen is O. Atomic Number is 8.
For this cache you will need a Tool of the Trade (TOTT). The approach to this cache can be very rough. You should attempt either on foot or by 4WD. The terrain is very rough around GZ with large holes in the ground. Take care doing this cache.
Please BYO Pen.