There is a huge leak on TM1 containment box window. I did a 70 psi helium pressure test on all TM1 water circuits this morning. The LD base leak rate was 0.0XE-9 atm.cc/sec. When applying the 70 psi helium to containment box window circuit, the leak rate on LD jumped to 1XE-4 atm.cc/sec in 5 seconds.I released the helium source right away,t but the conditioning station is full of helium  molecules already, and the leak rate on LD stays at 1xE-5 atm.cc /sec.  The leak on this circuit is huge.    Other water lines are good.