While the ideal solution is to develop a way to track items that are purchased and used within the scope of your LEED project boundary, some projects may find that this is not possible.  An alternative method for compliance you may consider attempting is to take an organization-wide approach to satisfying the credit requirements. To do this, thoroughly document the sustainability criteria met for total organizational purchases, and then extrapolate this performance to the project building. If most facilities within your organization have similar equipment needs, and your calculations are defensible and appropriate with clear documentation, you may be able to support achievement of this credit.