Magellan Longhorn Pipeline SIP Self Audit Report FINAL

2009 Annual System Integrity Plan Self-Audit Report For Magellan Midstream Partners, L.P. Longhorn Pipeline July 23, 2010 1 Table of Contents 1.0 Definitions........................................................................................................................... 4 2.0 Introduction ......................... 5 3.0 Self-Audit Methodology ..................................... 8 4.0 Significant System Developments in 2009 ......................................... 9 5.0 Summary of Findings from the Self Audit ....... 10 5.1 A synopsis of the most important integrity issues being addressed on the Longhorn Pipeline System and the status of activities and programs used to manage these risks.... 10 5.2 Important insights, results, and lessons learned from the previous year. ......................... 11 5.3 Insights from new integrity management processes or technologies, or innovative applications of existing technologies. ............................................................................... 11 5.4 Performance measurement results. ................... 12 5.5 New integrity management programs or activities that will be conducted or significant improvements to existing programs and activities............................................................ 12 6.0 Findings for the LMP Management Commitments .......................... 13 6.1 MC1: Longhorn Pipeline System Integrity “Process Elements” ....... ...