If we have prepared piping but cistern is not installed yet and it will possibly be installed in the future, can we get credit for it?

Hi, working on an office building project, we r pursuing this credit through option 2 : "Treat 50% of wastewater on-site...etc." Through the design Preliminary Review we received a comment stating

Here is a situation: Rain water is captured and treated for reusing to flush and flow fixtures. A single cistern storages both rainwater and municipal water supply.

Are Lagoons, or septic tanks rewarded at all in LEED V4? This credit was omitted from the new version and I am curious if I installed an on-site waste water treatment facility onsite which dischar

Under the Bird's Eye View here for WEc2, there is a citation of LEED Interpretation #10012 made on 05/09/2011 which states "projects may only count future infrastructure such as reclaimed water sys

LEED template use the flush fixture water which calculated based on occupant usage.

Can anyone who submitted a CIR for Option 2 regarding a campus situation post your results?