1. Lead from the front Texas Nodal http://nodal.ercot.com 1 Registration Market Call June Data Collection Window June 05, 2009

2. Lead from the front Texas Nodal http://nodal.ercot.com 2 Antitrust Admonition ANTITRUST ADMONITION ERCOT strictly prohibits Market Participants and their employees who are participating in ERCOT activities from using their participation in ERCOT activities as a forum for engaging in practices or communications that violate the antitrust laws. The ERCOT Board has approved guidelines for members of ERCOT Committees, Subcommittees and Working Groups to be reviewed and followed by each Market Participant attending ERCOT meetings. If you have not received a copy of these Guidelines, copies are available at the Client Relations desk. Please remember your ongoing obligation to comply with all applicable laws, including the antitrust laws. DISCLAIMER All presentations and materials submitted by Market Participants or any other Entity to ERCOT staff for this meeting are received and posted with the acknowledgement that the information will be considered public in accordance with the ERCOT Websites Content Management Operating Procedure.

3. Lead from the front Texas Nodal http://nodal.ercot.com 3 Agenda Antitrust Admonition High Level Recap of Kick Off Call Updates and Progress Reminders Q&A / Open Forum ERCOT asks that you log into the WebEx using your company name then your name. This will allow us to take roll call offline. If you have not logged in with your company name, please use the WebEx chat to tell the host your company is represented

4. Lead from the front Texas Nodal http://nodal.ercot.com 4 High Level Recap of Kick Off Call 2009 MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Private Use Network Transmission Data Collection June Window - Non-Wind Transmission / Planning / Protection Data Collection - Iteration 1 - Iteration 2 - Iteration 3 - Iteration 1 - Iteration 2 - Iteration 3 Private Use Network Planning and Protection Data Collection September Window - Wind / All Remaining Sites Transmission / Planning / Protection Data Collection - Iteration 1 - Iteration 2 - Iteration 3 MP-10 Phase 2 Final Validation SEM GO-LIVE 8/31 85% Prod Quality 95% Prod Quality 98% Prod Quality 85% Prod Quality 95% Prod Quality 98% Prod Quality 85% Prod Quality 95% Prod Quality 98% Prod Quality Kick Off Market Call

5. Lead from the front Texas Nodal High Level Recap of Kick Off Call: Transmission Data Collection Scope Inventory of Transmission Data Forms (high level lists) –Lines –Breakers and Switches –Capacitors and Reactors –Transformers –Static Var Compensators –Series Devices –Load Data ( non-puns will provide Aux / Site Service Load ) –* PUN Load 168 hr Profiles (private use networks only)

6. Lead from the front Texas Nodal High Level Recap of Kick Off Call: Transmission Data Collection Scope Note that transmission data will be pre-populated into your most recent Accepted RARF –This will be based off the following Zonal MP-10 updates Previous RARF Submittals (GSU Transformer and Transmission Assets tabs) –The pre-populated RARF will be sent to each RE’s Authorized Representative via email –Once sent, RE’s will use this RARF going forward Transmission Business Rules (applied during the screen process) can be found in the Resource Registration Guide http://nodal.ercot.com/readiness/rq/documents/index.html http://nodal.ercot.com/readiness/rq/documents/index.html

7. Lead from the front Texas Nodal High Level Recap of Kick Off Call: Planning and Protection Data Collection Scope Planning and Protection data are encapsulated in 1 tab for each Data submitted in previous data collection windows will be retained in the pre-populated RARF sent to your Authorized Rep Planning and Protection Business Rules (applied during the screen process) can be found in the Resource Registration Guide http://nodal.ercot.com/readiness/rq/documents/index.html http://nodal.ercot.com/readiness/rq/documents/index.html –Note that these will be published by 6/8/09 For PSSE file submissions, ERCOT is asking RE’s to place these in a ZIP file and submit in the same service request as the RARF –Note that the PSSE templates are located at http://www.ercot.com/gridinfo/generation/ http://www.ercot.com/gridinfo/generation/

8. Lead from the front Texas Nodal High Level Recap of Kick Off Call: Sub Synchronous Data Scope Sub Synchronous data will be required of Resource Entities that have already collected this data For Resource Entities that do not have this data available, it will be required at a later time if their site is impacted by / included in a Reactive Management Study –Note that RE’s can follow current RFP’s by following the Regional Planning Group (RPG) –Calendar of RPG Meetings: http://www.ercot.com/committees/other/rpg/ http://www.ercot.com/committees/other/rpg/

9. Lead from the front Texas Nodal http://nodal.ercot.com 9 Updates and Progress Current Project Status –Iteration 3 of the Private Use Networks Data Collection Window completed on 5/15 –Production Quality = 97% –4 remaining Private Use Networks are working with ERCOT to complete changes –ERCOT is finalizing QA on Planning and Protection Business Rules –Will begin to send initial audit reports and pre-populated RARF’s early next week, completing by 6/15 –RARF Guide will be complete and posted by 6/8

10. Lead from the front Texas Nodal http://nodal.ercot.com 10 Updates and Progress Receive Audit Report and pre-populated RARF week of 6/8 Conference call with Account Managers starting week of 6/15 Iteration 1 corrections due 7/13/09 (20 business days) Iteration 2 corrections (if needed) due 8/12/09 (15 business days) Iteration 3 corrections (if needed) due 9/1/09 (10 business days)

11. Lead from the front Texas Nodal FAQ and Common Issues Private Use Networks LRL must be set to 0 in their RARF –Reference: SIG0002 Private Use Networks v1.0 http://nodal.ercot.com/docs/pd/ida/index.html#oth http://nodal.ercot.com/docs/pd/ida/index.html#oth

12. Lead from the front Texas Nodal http://nodal.ercot.com 12 Q&A Q&A / Open Forum

13. Lead from the front Texas Nodal http://nodal.ercot.com 13 Appendix