Use of EA Cr 6 for a CS Project

Hi, I'm wondering if anyone has tried attempting this credit as an ID strategy in a CS project. I realize the intent is to show reduction during the performance period of and existing building, but I was thinking we could use the guidelines here to develop a tracking program for implementation, in addition to showing comparable efforts from the owner's other buildings. The owner has a similar, though not as extensive process in place, but this effort would serve to improve their current policies and reporting processes. Additionally, it is likely that the building would attempt EBOM at a later time. The major tenant is also planning on targeting CI for Gold. Thoughts?