Assess Embodied Carbon:

I suggest that the benchmark values for concrete should vary by region. In the USA, the NRMCA LCA values are typically used across the engineering industry to assess the impacts of concrete. The currently published report is v3.2 with a new version anticipated in the near future. Additionally, concrete quantities are typically determined by volume, not by mass. The benchmark values should reflect these standard practices.

I suggest a benchmark for grout and mortar for CMU are added as these are structurally necessary for CMU construction. 

Instead of applying a factor for embodied carbon in systems other than the structure and enclosure, the GWP of these systems should be calculated. If reductions in GWP in structural and enclosures sytems are achieved, this does not necessarily mean that the GWP in other systems is reduced. It is important that the GWP of these systems is calculated and optimized on their own. It is also a bit unclear on if the "SAndE" applies to just the enclosure and hardscape (or structure and enclosure) or if it applies to enclosure, hardscape, and structure. It is also unlikely that the structure and enclosure will be replaced every 10 years.

Optimized Building Products and Reduce Embodied Carbon: 

I suggest that structural material optimizations are included in the Optimized Building Products credit. I understand these items are included in Reduce Embodied Carbon but reducing the embodied carbon in buildings and other structures is indescribably critical at the moment and the importance of it is not emphasized sufficiently. By 2050, approximately 50% of carbon in new buildings will be from the embodied carbon with the other 50% from operational carbon. Allowing only up to 6 points on a 100+ point system for an item that carries so much weight does not appropriately call out the attention that needs to be paid to reducing embodied carbon so that worldwide climate goals are met. More points should be allotted to the Reduce Embodied Carbon credit. Option 4 under Reduce Embodied Carbon again provides disproportionately high points for a relatively low impact activity.