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