Natural ventilation

We are working on a residential core and shell project, and we are having some issues with the compliance of ASHRAE 62-1 ventilation requirements. Basically, the building has apartments on each long side and a central corridor that goes all the way through. All of the rooms include a operable window of 4% of the area within 25 feet, except a small service room that would only have a window to the corridor; therefore it would be ventilated through the adjoining space. Now, this central corridor is completely open to the outdoors on its sides; could we use the 4% rule, or do we need to go with 8% or 25ft2 minimum? The problem is that a 25ft2 window on that tiny space would be unreasonable. Thank you for your comments.