Can project teams document Materials and Resources credit 9 in LEED-Existing Buildings: Operations & Maintenance v2008 by weight? All other solid waste management credit requirements in other version of LEED allow weight or volume.
The project team is requesting clarification of whether weight can be used as a metric for LEED for Existing Buildings: Operations & Maintenance version 2008 for Materials and Resources credit 9: Solid Waste Management- Facility Alterations and Additions. Yes, In order to be consistent with other Materials and Resources waste management credits, project teams may use either weight or volume as a metric for Materials and Resources credit 9: Solid Waste Management- Facility Alterations and Additions in both LEED for Existing Buildings: Operations & Maintenance version 2008 and LEED 2009 for Existing Buildings: Operations & Maintenance as long as the metric is applied consistently for all waste. For project teams pursuing this option note the metric in the "Special Circumstances" section of the credit form.