| 0920 | The leak check was on 'twin flow low' and the leak level was at 2.3E-5cc/s. Enabled 'twin flow high' and the background drops to 5e-7cc/s with the pumping station connected. |
| 0930 | He background in IVC is still very high. May need to use N2 flush the IVC. There must be a lot of gases trapped. |
| 0955 | Spray He around the possible leak at the middle In seal. |
| 1128 | Isolate leak checker, He background 5.2E-7cc/s. The leak checker is contaminated by He |
| 1133 | Set 'Vent: at STOP' and then start regeneration to reduce the He background. |
| 1142 | Fill N2 cold trap full |
| 1422 | Flush IVC with N2 to reduce He background. Fill IVC to 100mbar N2. |
| 1435 | Leak level reached <1E-12cc/s after flushing with pumping station on |
| 1509 | IVC BG 1E-7cc/s. Flush with N2 again. Fill to 100mbar |
| 1514 | pump to 0.1mbar and fill to 100mbar again |
| 1522 | Connect the pumping station |
| 1732 | Sniffing test again. He background in the room 3.7E-5cc/s |