Southern Natural Gas Company 2013 Outage Review Meeting Customer con call and Webex March 14,

Welcome Tom Dender SNG Gas Control 2

Agenda Review Unscheduled Outages Review of Upcoming Outages – March, April & May North System South System South Louisiana – Outages for the reminder of 2013 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 denoted 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

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 Thomaston unit outage Projected return 03/22/13 Cap reduced up 100 MMcf/d Franklinton unit outage Projected return April 18, 2013 Bear Creek unit outage Projected return April 15, Compressor Station Storage Field LNG Compressor Station Storage Field LNG Pearl River Franklinton Gwinville Enterprise unit outage, return to service unknown Cap reduced up 125 MMcf/d

SNG North System Maintenance Review 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 Bear Creek Spring Shut-in Test 4/23/13 – 4/29/13 DIQ and DWQ allocated 64% Muldon Spring Shut-In Test 4/09/13 – 4/15/13 DIQ and DWQ allocated 34% Pigging 14” Logansport Line 4/23/13 (M) , Pell City unit maintenance during April Southern will be conducting other general maintenance during this period

SNG South System Maintenance Review 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 Enterprise Station Outage 5/06/13 – 5/10/13 Cap reduced up to 400 MMcf/d 9 Brookman Riceboro Pressure Test on the 30” South Main 2nd Loop and 24” South Main Loop (one line at a time) 5/01/13 – 6/30/13 Cap reduced up to 170 MMcf/d Southern will be conducting other general maintenance during this period Gwinville Station Outage 4/15/13 – 4/19/13 Cap reduced up to 200 MMcf/d Thomaston maintenance 4/01/13 – 4/15/13 Cap reduced up to 200 MMcf/d

SNG South Louisiana System Maintenance Review April - May Shadyside White Castle Franklinton Toca Gwinville LA MS Compressor Station Storage Field Compressor Station Storage Field Lacombe West Leg East Leg Pressure Test 24” WC-Franklinton Loop Starting April 8 through the end of June Cap reduced up to 400 MMcf/d (M) Sugar Bowl #6 White Castle, Shadyside Unit Maintenance Scheduled During Pipeline Outage Lacombe Relocated to Enterprise Begins Mid April 10 Pearl River Southern will be conducting other general maintenance during this period

SNG North System Maintenance Review remainder of 2013 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 Bear Creek Fall Shut-in Test 10/15/13 – 10/21/13 DIQ and DWQ allocated 64% Muldon Fall Shut-in Test 10/01/13 – 10/07/13 DIQ and DWQ allocated 36% Pressure Test 2 nd North Main East of Louisville 2 to 3 week outage Late Summer or Fall North system supply maybe reduced 11 Pressure Test 12” Gadsden Branch Loop during the month of July Bear Creek 1 unit down starting mid June for 8 weeks Muldon field outage starting 6/24 for 5 days Southern will be conducting other general maintenance during this period

SNG South System Maintenance Review remainder of 2013 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 Enterprise Station Outage 6/10/13 – 6/14/13 and 7/15/13 – October Rose Hill (M) Cap reduced up to 400 MMcf/d Rose Hill M/S (M) , July Outage 12 Brookman Riceboro Maintenance on the 16” South Main Loop 3 weeks in September Selma unit maintenance 6/03/13 – 6/28/13 Auburn unit maintenance 7/15/13 – 7/30/13 Elmore station outage 7/01/13 – 7/15/13 Cap reduced up to 300 MMcf/d Southern will be conducting other general maintenance during this period

SNG South Louisiana System Maintenance Review remainder of 2013 Shadyside White Castle Franklinton Toca Gwinville LA MS Compressor Station Storage Field Compressor Station Storage Field West Leg East Leg 13 Pearl River White Castle, Shadyside Unit Maintenance Mid September - mid October Southern will be conducting other general maintenance during this period

Gas Control Contacts Nancy Barton – Manager (713) – 420 – 6191 (office) (713) – 204 – 4815 (cell) Kalman (Kal) Dankovich – Outage Coordinator (713) – 420 – 7522 (office) (205) – 325 – 7305 (Gas Control) Jerry Peterson – Operations Analyst (205) – 325 – 7345 (office) (205) – 325 – 7305 (Gas Control) Paul Reed – Operations Analyst (205) – 325 – 7655 (office) (205) – 325 – 7305 (Gas Control) 14

Questions? 15