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3. 2 NNG Commercial 2002 Operating Plan Reconciliation of 2001 Plan to 2001 3CE Net Commercial Contribution 2001 Plan$404.4 Less Tenaska (TW) $ (4.0) Adjusted 2001 Plan $400.4 NET MARGIN New Contracts (Short Term TFX) 1.5 Storage 5.6 Market Decline (2.7) California/Texas Increases 3.2 Pricing & structuring - South 6.3 Offshore Revenue 2.2 Commercial Group Stretch (8.8) Other 0.8 8.1 EXPENSES Mobil amortization & base gas financing fee pd. 2000 1.5 Direct O&M (vacancies).6 Aviation.5 2.6 NON-RECURRING (7.0) Adjusted 2001 3CE$404.1

4. 10/10/013 NNG Commercial 2002 Operating Plan Reconciliation of 2001 3CE to 2002 Plan Net Commercial Contribution 2001 3CE $408.1 Less Tenaska (TW) $ (4.0) Adjusted 2001 3CE $404.1 NET MARGIN “Smart Luck” Revenues$ (10.8) Market Area Turnback/Recontracting (3.2) Market Decline (2.3) Production Decline (2.3) Offshore Revenue (2.6) Revenue from Capital 4.4 Regulatory Changes 1.5 Kansas Ad Valorem 2.0 Increase in Markets 6.6 Unidentified Stretch 8.0 1.3 EXPENSES Reg Amort.5 TC&S 2.5 Direct O&M (.1) 2.9 NON-RECURRING 11.7 2002 Plan$420.0

5. 10/10/014