The first floor contains a thulium generator, a thulium-compatible microchip, a plutonium generator, and a strontium generator.
The second floor contains a plutonium-compatible microchip and a strontium-compatible microchip.
The third floor contains a promethium generator, a promethium-compatible microchip, a ruthenium generator, and a ruthenium-compatible microchip.
The fourth floor contains nothing relevant.