M20 beam blocker was transferred from the hot cell to the beam line.
M9 beam blocker was transferred from the beam line to the hot cell.

Field at 50cm from M9 beam blocker during removal: 5000μSv/hr
Field above M9BB hole on monolith after removal: 3500μSv/hr

Unlike M20BB, M9BB has an unmodified lower shielding plate, and no plastic bushing.