1. ROS Meeting – 06/12/081Texas Nodal Program - TPTF Update Texas Nodal Transition Plan Task Force ROS Meeting Stacy Bridges, ERCOT Thursday, 06/12/08

2. ROS Meeting – 06/12/082Texas Nodal Program - TPTF Update Last month at TPTF / May 2008 During May 2008, TPTF met on:  May 5 – 7 May 5 – 7  May 22 – 23 May 22 – 23

3. ROS Meeting – 06/12/083Texas Nodal Program - TPTF Update Last month at TPTF / May 2008 Major Accomplishments / May 5 – 7, 2008:May 5 – 7 Nodal Protocol Revision Requests (NPRRs)—Endorsement of:  NPRR107, Nodal Emergency Interruptible Load Service (EILS) NPRR107  NPRR111, Timelines for Response by ERCOT to Transmission Service Provider (TSP) Requests NPRR111  NPRR117, Resource Registration Clarification NPRR117  NPRR118, Synchronization of Zonal Protocols for Section 14, State of Texas Renewable Energy Credit Trading Program NPRR118  NPRR120, Corrections and Clarifications for Real-Time Settlements NPRR120  NPRR122, Simplify Ancillary Services (AS) Settlement Formulas NPRR122  NPRR123, Inadvertent Energy Account Revision NPRR123  Draft NPRR, Congestion Revenue Rights (CRR) Settlements Revenue Equalization  (this draft NPRR was posted as NPRR130)NPRR130

4. ROS Meeting – 06/12/084Texas Nodal Program - TPTF Update Last month at TPTF / May 2008 Major Accomplishments / May 22 – 23, 2008 (cont’d):May 22 – 23 Early Delivery Systems (EDS) Project—Approval of:  Emergency Operations Test Plan  Texas Nodal Market (TNM) Go-Live ProcedureGo-Live Procedure Market Management System (MMS) Project—Approval of:  On May 23, TPTF discussed the results of the vendor impact study for incorporating the functionality for co-optimization of self-committed Resources in the Day-Ahead Market (DAM). TPTF approved the changes to incorporate this functionality into the MMS DAM and Supplemental Ancillary Service Market (SASM) Requirements.  On May 23, TPTF discussed the status of the vendor impact study for incorporating reporting requirements for NPRR102, Implementation of PUC Subst. R. 25.505(f), Publication of Resource and Load Information. This study is still in progress.NPRR102

5. ROS Meeting – 06/12/085Texas Nodal Program - TPTF Update Last month at TPTF / May 2008 Major Accomplishments / May 22 – 23, 2008 (cont’d):May 22 – 23 TPTF endorsed the following NPRRs:  NPRR114, Section 11, Data Acquisition and Aggregation NPRR114  NPRR124, Resource Node Updated Definitions NPRR124  TPTF endorsed forwarding TPTF comments for NPRR124 to the Protocol Revision Subcommittee (PRS) with the understanding that ERCOT would bring back to TPTF a procedure detailing how Resource Node types will be assigned.  NPRR128, Combined-Cycle Power Blocks with Multiple Voltage Interconnections NPRR128  NPRR132, Outage Clarification NPRR132  NPRR133, Addition of Power System Simulator for Engineering (PSS/E) Format NPRR133  Draft NPRR for Section 7 Cleanup to incorporate revisions for flowgate definitions and formulae into Nodal Protocols Section 7, Congestion Revenue Rights (this draft was posted as NPRR134)NPRR134

6. ROS Meeting – 06/12/086Texas Nodal Program - TPTF Update Last month at TPTF / May 2008 Major Accomplishments / May 22 – 23, 2008 (cont’d):May 22 – 23 TPTF endorsed the following Nodal Operating Guide Revision Requests (NOGRRs):  NOGRR018, Synchronization of OGRR204, Hotline Technology Update NOGRR018  TPTF identified no reliability issues for NOGRR018  NOGRR019, Synchronization of OGRR206, Black Start Satellite Phones NOGRR019  TPTF identified no reliability issues for NOGRR019

7. ROS Meeting – 06/12/087Texas Nodal Program - TPTF Update Last month at TPTF / May 2008 Other Notable Discussions/ May 22 – 23, 2008 (cont’d):May 22 – 23 Infrastructure (INF) Project:  On May 22, TPTF asked ERCOT to reconsider its interpretation of the compliance requirements affecting Market Participants per the North American Electric Reliability Corporation (NERC) Reliability Standard Critical Infrastructure Protection (CIP) 004-1, Cyber Security – Personnel and Training.  On June 3, 2008, a market announcement was distributed indicating that Market Participants who will be accessing ERCOT Systems via Digital Certificates should complete the CIP-004-1 requirements for personnel training and risk assessment pursuant to the timeline applying to each of their companies rather than by the July 1, 2008 deadline applicable to ERCOT.  On June 5, the compliance issue for CIP-004-1 was highlighted to the Technical Advisory Committee (TAC).

8. ROS Meeting – 06/12/088Texas Nodal Program - TPTF Update This month at TPTF / June 2008 During June 2008, TPTF will meet on:  June 9 – 10 June 9 – 10  June 23 – 25 June 23 – 25

9. ROS Meeting – 06/12/089Texas Nodal Program - TPTF Update This month at TPTF / June 2008 Upcoming Agenda Items / June 9 – 10, 2008:June 9 – 10  Market Rules Update  Review disposition of comments for NPRRs:  NPRR127, Synchronization of Zonal Protocols - Section 22 Attachments A, I, J & M NPRR127  Review disposition of comments for NOGRRs:  NOGRR020, Synchronization of OGRR198 - Firm Load Shed Implementation Time Periods NOGRR020  NOGRR021, Synchronization of OGRR205 - Modify Responsive Reserve Service Obligation NOGRR021  Nodal Program Update/ Nodal Timeline Update  Readiness Metrics Update  Registration Update  User Interface (UI) Subgroup Update  Quality Assurance Update

10. ROS Meeting – 06/12/0810Texas Nodal Program - TPTF Update This month at TPTF / June 2008 Upcoming Agenda Items / June 9 – 10, 2008 (cont’d):June 9 – 10  Market Information System (MIS) Update:  Review disposition of comments for MIS Business Requirements for Notices, Notifications, Alarms, and Alerts v0.03  Quick Response Working Group (QRWG) Update  EDS Status Update  Common Information Model (CIM) Update:  Discuss the status of the Energy Management System (EMS) CIM Importer and the status of the CIM Integration effort  Training Update  Review disposition of comment for the EMS/MMS Market Operations Test Environment (MOTE) Conceptual System Design (CSD) v0.02  NPRR112, Emergency Base Point Price Revision NPRR112  NPRR131, Ancillary Service Trades with ERCOT NPRR131

11. ROS Meeting – 06/12/0811Texas Nodal Program - TPTF Update This month at TPTF / June 2008 Upcoming Agenda Items / June 23– 25, 2008:June 23– 25  Nodal Program/ Nodal Timeline Update  QRWG Update  Review disposition of comments for the TNM 168-Hour Test Procedure168-Hour Test Procedure  Staffing Update  Discuss wind issues that may need Protocol changes  Quality Center Update  Credit Topics  Enterprise Integration Project (EIP) Update  MMS Update:  Discuss details of vendor impact study to incorporate reporting requirements for NPRR102

12. ROS Meeting – 06/12/0812Texas Nodal Program - TPTF Update This month at TPTF / June 2008 Upcoming Agenda Items / June 23– 25, 2008 (cont’d):June 23– 25  Enterprise Data Warehouse (EDW) Update:  Discuss the status of reports and extracts  Initial review of the Single-Entry Model Go-Live Procedure  Review revisions feedback for the Nodal Transition Outage Management Plan

13. ROS Meeting – 06/12/0813Texas Nodal Program - TPTF Update Future TPTF Meetings Future TPTF Meetings:  July 7 – 8, 2008  July 21 – 23, 2008  August 11 – 12, 2008  August 25 – 27, 2008 Visit the 2008 TPTF Calendar2008 TPTF Calendar

14. ROS Meeting – 06/12/0814Texas Nodal Program - TPTF Update Questions? Please send comments to: Stacy Bridges 512.248.6709 sbridges@ercot.com