Common area toilets

Per the 7/2010 Addenda, the project is exempt from WEp1. It sounds like the project would fall under “Case 4” of the Water Use Reduction Additional Guidance document (updated August 16, 2010) since there are plumbing fixtures both within and outside the tenant space. Under Case 4, the project will not be able to claim any water savings under WEc1. Essentially, the Addenda and additional guidance allow your project to pursue LEED certification without worrying about the plumbing fixtures outside of your tenant space, but do not allow claims of water savings on the limited fixtures within the space. In any case, I’m not sure that an ultra-low flow lavatory would have achieved enough water savings on its own to meet even the lowest threshold for WEc1.