Southern Natural Gas Company 2015 Outage Review Meeting Customer con call and Webex March 18,

Welcome 2

Agenda Review Unscheduled Outages Review of Upcoming Outages – March/April & May North System South System South Louisiana – Outages for the remainder of 2015 North System South System South Louisiana Contacts 3

Disclaimers Anticipated Impacts are estimates. Actual nominations, market demand, weather and pipeline conditions, etc. will determine if, and through what level, restrictions become necessary. Unless otherwise stated, all scheduled dates represent gas days as defined in the Southern Natural Gas Pipeline tariff to mean a period of twenty-four consecutive hours, beginning and ending at 9:00 a.m. (Central Clock Time). Scheduled dates are subject to change. Projects may be added, altered, delayed or cancelled. SNG will provide notice of such additions or changes via SoNet Premier postings. Dates as posted on SoNet should be deemed correct in the event of conflicts between SoNet posted dates and dates within this presentation. 4

Color Key for Maps Green – No Impact Anticipated Yellow – Restrictions are possible – With extended duration, restrictions could be necessary from time to time – Meter(s) affected are noted with (M) Red – Restrictions are probable 5

Southern Natural Gas Pipeline LA MS AL GA FL Enterprise White Castle Bear Creek Muldon Chattanooga Atlanta Thomaston Albany Elba SC Aiken Elba Express North System South Louisiana South System 6 Compressor Station Storage Field LNG Compressor Station Storage Field LNG Pearl River Franklinton Gwinville Logansport Bienville Onward Pickens Rankin Toca Shady Side Louisville Bay Springs York Gallion Selma Elmore Auburn Holy Trinity Pavo Reform McConnells Providence Tarrant Pell City DeArmanville Bell Mills Rome Ellerslie Ocmulgee Hall Gate Wrens Hartwell Riceboro Brookman

Southern Natural Gas Pipeline Unscheduled Outage Update LA MS AL GA FL Enterprise White Castle Bear Creek Muldon Chattanooga Atlanta Thomaston Albany Elba SC Aiken Elba Express North System South Louisiana South System 7 Compressor Station Storage Field LNG Compressor Station Storage Field LNG Pearl River Franklinton Gwinville Logansport Bienville Onward Pickens Rankin Toca Shady Side Louisville Bay Springs York Gallion Selma Elmore Auburn Holy Trinity Pavo Reform McConnells Providence Tarrant Pell City DeArmanville Bell Mills Rome Ellerslie Ocmulgee Hall Gate Wrens Hartwell Riceboro Brookman 8” West Point Line abandonment. Franklinton unit outage return to service April of 2015 White Castle unit outage return to service

SNG North System Maintenance Review March/April/May LA MS AL GA Logansport Bienville Bear Creek Storage Onward Pickens Rankin Louisville Muldon Storage Reform McConnells Providence Tarrant Pell City DeArmanville Bell Mills Rome Compressor Station Storage Field Compressor Station Storage Field Huntsville Chattanooga Atlanta 8 Southern will be conducting other general maintenance during this period Bear Creek unit maintenance one unit at a time Through June of 2015 Hydro-test on NMLL to Gadsden Branch loop and Branch line maintenance April to June timeframe Pigging on West Point Loop Line April of 2015 Bear Creek Spring Shut-in test to DIQ and DWQ allocated 64% AL Remediation on 24” NMLL through Hydro-test on 2ndNML to Pipeline remediation on NMLL to Pipeline maintenance on NML April to June Pipeline relocation on NML to Muldon Shut-in test to DIQ and DWQ allocated 36% Remediation on NML/NMLL/2ndNML to Pressure test /remediation 2ndNML to Remediation on NML to Remediation NMLL to Relocation of 6” Rome Calhoun line April/June

SNG South System M aint. Review March/April & May MS AL GA Enterprise Gwinville Selma Auburn Ellerslie Thomaston Ocmulgee Hallgate Wrens Elmore York Gallion Bay Springs Compressor Station Storage Field LNG Compressor Station Storage Field LNG Atlanta Elba Hartwell Elba Express Aiken Holy Trinity Albany Pavo 9 Brookman Riceboro Southern will be conducting other general maintenance during this period Hydro-test SMLL to Remediation on Montgomery Columbus line to Remediation on 12” Jacksonville line to Hydro-test SMLL May timeframe Enterprise station/Rose Hill outage to ” Macon Branch line maintenance to

SNG South Louisiana System Maintenance Review March/April & May Shadyside White Castle Franklinton Toca Gwinville LA MS Compressor Station Storage Field Compressor Station Storage Field West Leg East Leg White Castle, Shadyside Unit Maintenance April and May West Leg Capacity impact up to 150 MMcf/d 10 Pearl River Southern will be conducting other general maintenance during this period Remediation on Duck Lake to Franklinton May/September

North System remainder of the year Item #29-remediation on the 14” Logansport line segment between Logansport and Bienville compressor stations the month of June. Item #30-pipeline relocation on the North Main loop line east of Tarrant compressor station to Item #31-Remediation on North Main loop line west of Tarrant compressor station to Item #32-Remediation on North Alabama line to Item #33-Pipeline relocation of the Chattanooga Branch and loop line. April to June timeframe. 11

North System remainder of the year cont. Item # 34-Maintenance on the North Main line east of Tarrant compressor station to Item # 35-Maintenance on the North Main line west of Tarrant compressor station to Item # 36-Maintenance pigging on the Marietta Branch line east of Bell Mills compressor station. June to November timeframe Item # 37-Hydro-test the TCI loop line west of Tarrant compressor station to Item # 38-Hydro-testing on the 2 nd North Main line east of McConnells compressor station. Capacity could be reduced as much as 285 MMcf/d - September/October timeframe 12

North System remainder of the year cont. Item # 39-Remediation on the 2 nd North Main line west of Tarrant compressor station. Capacity could be reduced as much as 355 MMcf/d. September/October timeframe Item # 40-Remediation on the 2 nd North Main line east of Tarrant compressor station. Capacity could be reduced as much as 245 MMcf/d. September/October timeframe Item #41-Relocation on the Chattanooga Branch line during the last half of the year. Item #42-Fall Storage field Shut-in-tests. Muldon to Bear Creek to

South System remainder of the year Item #43-maintenance pigging on the 30” Riverdale line north of our Thomaston compressor station in Georgia during the month of September. Item # 44-Hydro testing on the Huber #1 line east of Wrens compressor station to Item # 45-Upgrade work at Thomaston compressor station. Capacity reduced up to 330 MMcf/d. Mid August/October timeframe. Item #46-Remediation on the Brunswick line south of Ocmulgee compressor station. April/May timeframe Item # 47-Upgrade work at Brookman compressor station to Item # 48-Upgrade work at Riceboro compressor station to

South Louisiana System remainder of the year Item # 49-Maintenance at White Castle and Shadyside compressor stations. West Leg capacity impact up to 150 MMcf/d - September/October timeframe 15

Gas Control Contacts Adam Krustchinsky – Manager (713) – 420 – 3265 (office) (713) – (cell) Kalman (Kal) Dankovich – Outage Coordinator (713) – 420 – 7522 (office) (713) – 420 – 7305 (Gas Control) Jimmy Reese – Lead Controller (713) – 420 – 7310 (office) (713) – 420 – 7305 (Gas Control) Daniel Mitchell – Lead Controller (713) – 420 – 5874 (office) (713) – 420 – 7305 (Gas Control) 16

Questions? 17