You are looking for a film can hidden in something else at Taconic HQ. This is a field puzzle and it is not a challenge cache.
You do not need water to access the log. You, all by yourself, have the needed tools to get to the log for this cache. If this cache makes you uncomfortable, you do not need to search for this cache. A special tool may make you more comfortable… a tissue, a paper towel, or a balloon. Use your imagination. A container of special ‘tools’ is provided at the base of the cache holder that may help you.