Existing refueling station

Maura, if it's not within your LEED boundary for this project, and if it was counted for compliance with this credit for another LEED project, then you couldn't count it here. (This is based on the Minimum Program Requirements, btw.)

I would try to narrate my way into this credit, Maura. It seems anti-LEED to not be able to take advantage of a campus feature or encourage the buidling of more fueling stations when one is near. My assumption is that the refueling station is fuel based and not electric. Determine if the station has the capacity to serve your vehicles in addition to the 3% of the original building occupants. You might even establish what the capacity is at the refueling station for future project. Then I'd to a through put analysis to demonstrate that you wouldn't have long lines of idling cars waiting to refuel. Alternatively, if these are electric stations then the cars tend to stay there for the whole shift and the original building is using them all and you can't double dip. But it may be easier to add electric charging stations there due to existing electrical service. Your walking distance is equal to buses and as long as it is safe, should be appropriate. I think if the existing infrastructure can handle your project then you should take advantage of it. Worth a shot.