We are planning to have Sedum Roofing, partly to recieve credit 6.1. I have read a lot about vegetated roofing also to pursue credit 6.2.

The reference guide states that "90% of the avg annual rainfall is equivalent to treating the runoff from 1" of rainfall for a Humid Watershed (at least 40")." I don't understand how they arrived a

Could this credit be achieved if it were only proposed to treat the storm water runoff with a structural measure and not capture?

We have a client in a far northern climate that wants to achieve additional credit by installing rain gardens to handle runoff during the summer rainy season.

I am a little bit confused by this project and would like to have your advise.

Dear Leedusers, our project will install a retention tank which will collect storm water from the whole LEED area. The retention tank will provide water for flushing toilets and watering greenery.

I cant find clear cut for Stormwater Management Plan definition, i mean is it using both structural and non structural plans to achieve stormwater quality control?

I heard a comment from a LEED user that GBCI reviewers do not understand the application of Best Management Practices in series.

If I understand correclty, we can use the table in the reference guide with several BMPs to determine the removal efficiency.