See all forum discussions about NC-2009 SSc6.2
 Subscribe to new posts about NC-2009 SSc6.2 Post a new question aboutNC-2009 SSc6.2
See LEEDuser’s guidance on NC-2009 SSc6.2»
FAQs about SSc6.2 :

Why do the requirements focus on 1-year and 2-year, 24-hour storms?

Why include the 1-year storm in the credit requirements? Won't management practices for the 2-year storm be effective?

How can green roofs count as a stormwater control measure?

How can I achieve compliance if my project's stormwater control measures are outside the LEED project boundary?

I have 100-year data—how do I convert to 2-year?

Is it an acceptable strategy to capture the rainwater into tanks and discharge it into the public sewers after the rainstorm reducing the peak discharge?

Are there special considerations for international projects?

What performance threshold do I need to achieve for an Exemplary Performance point?

The calculations for this credit are always a headache! While our projects are usually awarded the credit, the equations in the LEED Reference Guide are helpful mostly for sizing a reservoir or cistern, but don't help you get to the final results. Does US

View answers »

Forum discussion

NC-2009 SSc6.2:Stormwater Design—Quality Control

Reduction of impervious area

I have a project where we are promoting infiltration by installing permeable pavers for a portion of the pavement, and we are capturing and treating runoff from 90% of the average annual rainfall event, however we are increasing the total impervious area from the existing conditions. Can I still meet this credit? We are removing 80% TSS for all runoff from the site.

0
Post a reply

You rely on LEEDuser. Can we rely on you?

LEEDuser is supported by our premium members, not by advertisers.

Go premium for $15.95  »

Profile picture for user Mike Dee
Michael DeVuono
Regional Stormwater Leader
Arcadis North America
LEEDuser Expert
144 thumbs up

Thu, 02/05/2015 - 15:46

In short yes, you are good. Reducing impervious surface is one of the ways to improve water quality, but not an actual requirement for this credit. Just calculate a runoff volume using the 90% annual rainfall event, treat that volume for 80% TSS removal.

Add new comment

To post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.