The 18' shielding block which lies west of the T1 cooling package was removed on Friday Mar 24 so that vacuum equipment could be craned into the 1A tunnel.  During replacement, the flexible SS hose for T1 target return water got caught under the block and was ripped apart.  Workers in the area did not realize this had occurred.  The cooling package tripped off when the hose ripped (likely due to low water flow or low supply pressure).  In total approximately 6.5L was lost which flowed to the 1A tunnel below.  The hose connections at the target and cooling package do not appear to have sustained damage.  Plans are under way for a replacement hose to be fabricated and installed.

Update March 30, 2017:  The damaged hose has been replaced with a new 20' long braided SS hose with 3/4" male NPT fittings both ends.  Both air supply lines for T1 profile monitor actuation (1/4" copper) were also damaged during the Mar 24 block move and they have now been replaced.  All hoses, cables, etc on the west side of the T1 monolith have been re-routed or secured to reduce the chance of this happening again in the future.