Found the water level on TCS-Y chiller to be just above the zero level. I added 1420ml to bring up the water level up to the 3/4 level. Before today, water added was 40 days ago. TJ and Jason checked the system lines and found no apparent leaks. TJ is going to take a look on the table.
When TJ and I went out to check on the chillers around mid-morning, I added an additional 750 mL of water to the chiller. This was added due to an air bubble under the mesh screen filter giving an incorrect reading of the chiller fill level; I released this bubble and then filled with water to the mark Jeff had filled to earlier in the morning.