Should I consider process water?

Nadia Ayala

Architect / LEED AP BD+C

KILTIK Consultoría

LEEDuser Basic Member

36 thumbs up

March 22, 2012

Hi, My project is a pharmaceutical facility. For their industrial process, they use a fairly large amount of water. I was wondering if process water is considered for this credit. Our intent is to use some of this water on flush fixtures and irrigation. The spare amount would be conducted to a large soakaway pit. Would that comply with WEc2 and WEc3 (assuming we have a 50% efficiency in fixtures, considering the use of process water)? Thank you.

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Dylan Connelly

Mechanical Engineer

Integral Group

LEEDuser Expert

342 thumbs up

Thu, 03/22/2012 - 20:22

If the process water has been used and recaptured then it would be considered non-potable. Then you would be meeting the requirements of Option 1: Potable water reduction.

Nadia Ayala

Architect / LEED AP BD+C

KILTIK Consultoría

LEEDuser Basic Member

36 thumbs up

Fri, 03/23/2012 - 16:15

Dylan, Thank you for your reply. Nevertheless, I would still like to know, if we would pursue option 2 for this credit, would we have to consider the whole amount of water to achieve the 50% reduction, including the process water? Thank you.

Tristan Roberts

Representative

Vermont House of Representatives

LEEDuser Expert

7780 thumbs up

Thu, 02/07/2013 - 22:42

Nadia, I see why the question comes up, but the scope for wastewater under Option 2 here is identical to the scope of WEp1/c3. This is spelled out in places like LEED Interpretation #5186 made on 02/10/2009.

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