Wastewater management in my project: GIB C14? Innovation Point?

Hello, The project I am working on will re-use a significant percentage of its wastewater for irrigation purposes. Wastewater will go to a municipal wastewater treatment facility, where it will undergo treatment to meet local and international water quality standards. Treated water will then be pumped back into an irrigation-specific water distribution network. I think this meets the intent of GIB C14 because (a) pollution from wastewater will be reduced (there is no current wastewater treatment in the town I am working) and (b) water will be reused, probably to the 2 point threshold (50% of generated volume re-used). However, there are a couple ways in which this strategy may not meet the reference guide requirements: (a) the new wastewater treatment plant is being built outside the project boundary as a separate project, (b) the treatment plant is not only linked to my LEED ND project, but to the whole municipality (c) it will not be possible to say that the exact wastewater generated in my project will be what is pumped back through the distribution network, as the treatment plant will also receive wastewater from the rest of the town. We can estimate volumes out and volumes back in, though. My project's strategy does not appear to meet options 2 or 3 of the pilot Sustainable Wastewater Management credit. Any thoughts? Could this strategy successfully apply for GIB C14? Would it require a CIR? Or is it a different type of strategy that requires an innovation (IDP) credit? Thank you much as always, Daniel