Figures F1-F6
Tables T1-T2

F1. Schematic of the PCS.

F2. New cutting shoes.

F3. Degassing the PCS.

F4. Time-pressure plots for trial runs.

F5. Time-pressure plots, Site 1230.

F6. Volume-pressure plots, Site 1230.

Tables T1-T2

T1. PCS operations.

T2. Composition of gas released from the PCS.

Figures F1-F6
Tables T1-T2