[#21] Minimum recommended catastrophic contingency/disaster reserve for worst-case structural damage, relocation, cover-up and large-scale liabilities.

[#1, #2, #5, #6, #7, #9, #10, #12, #25] Vacuum-rated containment chamber, internal mercury tank, vapor control/reclamation unit (initial install), vacuum pumping stacks, vacuum instrumentation & feedthroughs, remote manipulators, monitoring suite initial hardware, UPS/generator, and initial data/record hardware.

[#20] Dedicated liquid funds for immediate contractor/hazmat mobilization and rapid containment.

[#24] Reserved decommissioning and long-term decontamination/disposal costs for mercury and contaminated systems.

[#3, #16, #23] Purchase of ~2,100 kg elemental mercury with chain-of-custody, initial HAZMAT/PPE kit & training, and initial research/characterization program funding and startup equipment/simulations.

[#4, #8, #11] Floor-level secondary containment, structural reinforcement and clean-room/HVAC installation (sumps, spill trays, floor reinforcement, installation).

[#22] Initial legal counsel, public affairs setup and cover-up budgeting.

[#24] Specialized rigging/transport and placement costs for installation on the highest floor.

[#18] Initial permits, licenses and setup of hazardous waste plan and environmental approvals.

[#13, #14, #15] Ongoing fully-burdened salaries for security (6 FTEs), technical/vacuum/hazmat technicians (4 FTEs) and scientific staff (2 FTEs).

[#19] Annual insurance premiums for hazardous-material coverage, environmental liability and site-level policies (working figure).

[#23] Ongoing research, experiments, simulations and specialist contracts for characterization and safe experimentation.

[#22] Annual legal retainer, public affairs and cover-story maintenance.

[#11] HVAC, isolation and power conditioning energy and maintenance costs.

[#17] Regular consumables: O-rings, seals, filter cartridges, pump parts and replacement trap media (excludes dedicated mercury media line-item).

[#9] Maintenance, spares and service contracts for vacuum-rated manipulators/robotic arms.

[#18] Annual reporting, environmental monitoring, inspections and permit renewals.

[#10, #25] Data storage, secure archival, redundant logging, and ongoing monitoring/alerting costs (monitoring suite + record retention).

[#6] Service agreements, spare parts and periodic replacement for turbomolecular/backing pumps (redundant stacks).

[#16] Annual refresher training, PPE replacement and certification for mercury handling and vacuum safety.

[#5] Replacement of mercury-specific scrubber media, cold-trap maintenance and sorbents for vapor reclamation.

[#7] Calibration, maintenance and certification of vacuum gauges, feedthrough interlocks and PLCs.

[#12] Fuel, periodic testing and upkeep for UPS/generator integration.