(Capcom's primary storyline)
The Umbrella Chemical Plant was a large factory located in Arklay County, some distance into the Arklay Mountains outside Raccoon City. The chemical plant was one of Umbrella USA's many publicly-known facilities in the area. The chemical plant was itself built atop NEST, a top-secret bio-weapons research facility, with senior research staff such as Dr. William and Annette Birkin using it as cover.[note 1]
When the chemical plant was opened is uncertain, though it is known the laboratory complex beneath it was completed in 1991. While its location outside Raccoon City would have spared it from the Sterilization Operation, it was likely already destroyed by the self-destruction of the NEST complex.
The chemical plant was or looked fully operational in September 1998, and utilised railway lines to transport cargo and personnel into train yards on one side of the plant. One of the shelters was used by Umbrella USA as the accessway to NEST, consisting of an elevator for personnel, with the nearby turntable itself being a massive cargo elevator for transporting the train itself. A basement level beneath this yard was used to both power the turntable, and to allow additional transport to other facilities by way of ropeway through limestone caverns.
- The Resident Evil 2 remake was to have the players reach the factory by way of a cable car into the mountains. This was cut in favour of an underground cavern taking the player straight to NEST.
- A translation error in the Panel room's examine text implies this is a "construction site". However, the description in Japanese refers to it as a "factory" (工場 Kōjō ).
- In Resident Evil 2, Sherry tells Claire her parents work at the chemical plant.