As stated in the Leeduser’s viewpoint the SSc4: Rainwater management is a combination of stormwater quality control and quantity control of previous LEED V3 credits SSc6.1 and SSc6.2.
Since our predevelopment project has about 90/95% of imperviousness, the strategies we are evaluating are the following: To increase the green surfaces and Harvest rainwater captured from the roofs.
While for the runoff volume there are clear requirement and methodology compared with LEED V3 SSc6.1, it seems there are not any water quality requirements similar to LEED V3 SSc6.2 (for example there are not any threshold of xx% removing of total suspended solids and if the TSS should be treated or not).
Does someone has already focus on the rainwater harvest quality treatment and can give me a feedback?
Thanks in advance
Fabio
LEED Pro Consultant
Bioconstruccion & Energia Alternativa77 thumbs up
November 21, 2018 - 11:42 am
I have the same question.
Can anyone provide some guidance please?
Thanks.
Michael DeVuono
Regional Stormwater LeaderArcadis North America
LEEDuser Expert
186 thumbs up
December 6, 2018 - 9:07 am
The idea behind GI is that the water quality component happens when your runoff is manged by green infrastructure. That is why you aren't seeing a requirement that says remove XX% TSS or other specific targets.
Does that answer your question?
Mei Zhu
Senior EngineerGewalt Hamilton Associated, Inc.
6 thumbs up
February 25, 2019 - 2:46 pm
Our project is within a site where currently is a parking lot. The proposed site include a small building and the other half lawn area. If this project was done with the LEED 2009 SS C6.1 Stormwater Design-Quantity Control, it can be easily demonstrated that the proposed site will result in a 25% decrease in the volume of stormwater runoff. However, as I am the LEED V4 Rainwater Management, it seems that it compare the proposed runoff with the "natural site hydrology". Does the "natural site" refer to before the site was ever developed, or does it refer the developed site prior to our proposed development? Thank you!