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 have been provided with 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.
K znexf gur fcbg. Chg gur gjb Kf gbtrgure naq lbh jvyy evfr gb gur bppnfvba.