1. WECC Glossary of Terms Reliability Policy Issues Committee April 28, 2010 Steve Rueckert Director of Standards

2. WECC Glossary of Terms Glossary Contents WECC terms from approved WECC Regional Reliability Standards and WECC Criterion Link to the NERC Glossary 230 terms Appendix 1 - WECC Acronyms and Initialisms Appendix 2 – Capitalized terms from approved WECC Standards and Criteria for which no definition exists Lower case Develop Definition Appendix 3 – Unofficial WECC Terms Disclaimer regarding legal application 2

3. WECC Glossary of Terms Next Steps WECC terms Revised version of the NERC Glossary posted the week of April 19 New terms in NERC Glossary allow deletion of WECC terms Appendix 1 - WECC Acronyms and Initialisms No changes or modifications needed Appendix 2 – Capitalized terms from approved WECC Standards and Criteria for which no definition exists Revisions have been made to certain WECC Criteria (former Business Practices) to change capitalization Lower case some terms Upper case some previously lower case terms due to the existence of the term in the NERC Glossary Appendix 3 – Unofficial WECC Terms Leave as is with disclaimer or delete 3

4. Questions Steve Rueckert Director of Standards Western Electricity Coordinating Council 801 883-6878 steve@wecc.biz