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

I work on the project where it is impossible to design non-structural measures because soil can´t infiltrate almost any water.

hi there, here's what will probably be an easy question for you but is stumping me, as this is my first time documenting this credit.

We have site that is located about 600m from the sea, hence the stormwater will be discharged to the sea instead going to municipal infrastructure.

The civil engineer on our project made the following comment : "Item 6.2, quality control: all exfiltration trenches accepting rainwater discharge are "dry" and that is considered as pretreatment

I'm working on a major remodel project next to the ocean.

If we are increasing the total impervious area on the site, but treating the stormwater to reduce the TSS, do we still meet the intent of the credit?

I would like to know what determines the site boundary for capturing the 90% anual rainfall total. Does the treatment area have to be the entire site boundary?

Hi, Question one. We are in a semi-arid watershed. In the calculations, we count on 0,75 inch rainfall during 24 hours? We are planning to clean the rainwater from the roof.

I’m working on a Project in Portugal, which consists in a 13.400m2 site, with 6000m2 rooftop (harvests rain), 2500m2 green roof, 2735m2 of gardens, 306 m2 of planters and 1840m2 of impermeable pave