What performance threshold do I need to achieve for an Exemplary Performance point?
Why do the requirements focus on 1-year and 2-year, 24-hour storms?
How can green roofs count as a stormwater control measure?
I have 100-year data—how do I convert to 2-year?
Are there special considerations for international projects?
Forum discussion
NC-2009 SSc6.1:Stormwater Design—Quantity Control
Greetings Our project is a 30 year old building undergoing a Major Renovation and will be registered as LEED-NC v2009. In calculating pre- and post-development runoff, do we consider the pre-development conditions of the site 30 years ago when the building was originally constructed (greenfield) or the site conditions before the renovation (existing building and grounds)? Thank you.
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