Underground LEED Boundary

Greetings I'm working on an office project with underground parking. There is a LEED boundary which has been drawn for the street level, but the underground parking goes beyond this boundary. How should we address this situation? We are thinking on presenting the street level boundary as the oficial LEED boundary for the project, and explain the situation on the Special Circumstances section of PIf4. We think this is the best approach, since expanding the street level LEED boundary as a projection of the underground parking would affect many SS credits, and would not be faithful to the project's conception and work activities. Nonetheless, I would like to know your thought on this issue. Any ideas?