The definition of construction and demolition debris on page 362 of the technical guide says "pre-existing structures". I understand the exclusion of land clearing debris, such as soil, vegetation, and rocks.
Our office usually counts demolition of pavement as demolition debris. If it is ground and used on-site somehow, my understanding is that you would count the weight or volume of it as "diverted waste" and you would also count the value of the ground material in MR 4 recycled content (because it isn't in it's original form for MR 3 Reuse).

Also, our projects will be relocating several young trees to another location on campus, but not within the LEED boundary. I don't see a way to count this in the LEED calculations at all as diverted or reused.

Comments?