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

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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

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How can green roofs count as a stormwater control measure?

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

Typical TSS measures from Sedum roofing

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. I wonder what can be expected from sedum roofing when it comes to the quality of the stormwater running through it. I assume that the water has no TSS in it when falling onto the roof. My question is: - What TSS inhold can be expected to be added to stormwater that runs through Sedum? The intent with my question is to answer the following follow up question: - What filtering solution is suitible for filtering these TSS? Thanks in advance

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Fri, 09/26/2014 - 13:01

We have a Sieve analysis for the sedum soil constituents, meaning that the dimensions of the soil particles that would, worst case, be released from the sedum itself - are known. Would it, in fact, be possible to argue that no TSS from the Sedum would be added to the stormwater after a short period for the Sedum to reach "steady state"? And that only bird excrement and such would factor as the TSS that is being added to the water?

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