Renewable Energy Certificates

All or some of the renewable energy attributes associated with generation owned or operated by PacifiCorp Energy may be used in future years to comply with state or federal renewable portfolio standards. PacifiCorp Energy has and will from time to time sell the green attributes from renewables facilities that are in excess of its current needs to other entities across the nation in wholesale market transactions. These green attributes may be sold separately from the underlying power or rebundled with system energy. To the extent PacifiCorp Energy sells renewable energy attributes, the underlying power is recorded as null power within an annual fuel mix report. Null power cannot be used for complying with state or federal renewable portfolio standards. Likewise, renewable energy attributes may not be sold once they have been used for complying with state or federal renewable portfolio standards.