A Cerberus facility on Garvug. Doctor Rosskins, overseer of the isolated outpost, was charged with developing bioweapons aimed at turians. In time, Rosskins' team created a toxic gas which caused only minor symptoms in levo species while killing dextro. The intended result was a strain that would be completely harmless to humans but devastating to the target species.
With Cerberus becoming public enemy number one after siding with the Reapers, Outpost Siberia was among the facilities discovered and assaulted. Quarian forces moved against it, but a Cerberus Gunship caught the frigate Kolosya as it entered Garvug atmosphere. The quarians had been intending to bombard the base close range with their guns and take over the wreckage -- in and out, quick and clean. As it happened, the damaged Kolosya had to set down or risk becoming a crater. Other quarian ships responded to its distress call, as did Titan Corporation, and between them they took the outpost -- but not before Cerberus agent "Grizzly" made a mortal enemy of Captain Vik'Sajee.