Yes, tenant purchases must be included in this credit, much like the other LEED-EBOM Materials and Resources credits that cover purchasing. However, the EBOM 2009 rating system offers a 10% floor area exemption option for multitenant buildings. In instances where tenant data cannot be gathered, or the EBOM applicant does not have control over tenant operational practices, the project team may exclude up to 10% of the building’s gross floor area for any credit. See the Documentation Toolkit as well as page xxii of the Reference Guide for further information.