The kaiser_2d3.zip file you have requested: Maps Levels Missions / Single Player / K to L Titles / The Refueling Station - 16.73mb is not available. Perhaps try browsing all files for the game Doom III and upload any files you want to share or are missing. This is the only information we could locate:
"The Refueling Station supplies fuel and other valuable materials for Alpha Lab's Hydrocon and the Monorail. Waste products from Recycling Sector 2 are also transfered here for conversion into valuable materials such as fuel and plasma. You are a lon Kaiser, a member of Last Man Standing Coop, has created a single player standalone Doom 3 Map named Refueling Base.