The LEED Project Submittal Tips guide for C&S from GBCI (published 12/23/2011) states that EBOM WEc4.1 Cooling Tower Water Management is allowed in BD&C v2009 as an ID credit. EBOM WEc4.1 focuses on chemical management, whereas WEc4.2 calls for 50% nonpotable water for makeup water.

We would like to use at least 50% nonpotable water for our cooling tower. Would we be able to follow EBOM WEc4.2 requirements as an ID credit, even if it is not directly mentioned in the Submittal Tips guide? This approach meets the intent of an ID credit: it is not addressed in the CS rating system, and it is certainly quantifiable and applicable to other projects.

Anyone have any experience with this? Thanks.