This project is previously developed, though existing buildings have been demolished and basically the site is a sand area with some vegetation on it that developed after demolition. Basically the whole site will be dug out and have a basement. There will be vegetation in a courtyard and on roofs, both extensive and intensive. FAR is >1.5. Onsite soil cannot be reused as it is mixed with demolition waste.

The team is struggling with the question if the credit can be achieved at all.

1. The imported "soil" is more a substrate than soil, it is made up of recycled clay bricks with added organic compounds. We are not sure if this can be seen as "soil" at all.

2. 2items in table "Soil restoration guidelines" cannot be achieved, organic matter and compaction. both state a minimum of 12 inch / 300 mm, while the green roof substrate will be 100 and 200 mm. 300 mm can probably not be achieved for structural reasons.

Has anyone experience achieving this credit with green roofs? I have the impression this project cannot achieve the credit but the owner wants this to be rechecked.