NORTHERN INDIANA PUBLIC SERVICE COMPANY
IURC APPROVED GAS RATE ADJUSTMENT
FOR

APPENDIX A
RATE ADJUSTMENT

Rates: 311,315,316,317,321,322,323,325,338,324,333 and 343

COMMODITY COST OF GAS ADJUSTMENT (Year 1 and Year 2 & After)

Rates: SCDS,PPS: 311,315,316,317,321,325,338

TAKE-OR-PAY SURCHARGE ADJUSTMENT

Rates: 328,330,336,340,343,344,322A,324A,334A and
Residential Spacecooling Rider

TRANSITION COSTS SURCHARGE ADJUSTMENT

Rates: 328,330,336,340,343,344,322A,324A,334A and
Residential Spacecooling Rider

THE CHOICE COSTS SURCHARGE ADJUSTMENT
RATES SCDS: 311, 315, 316, 317, 321 and 325

PURSUANT TO CAUSE NO. 37091, APPROVED BY ORDER OF THE INDIANA UTILITY REGULATORY COMMISSION ON MAY 14, 1986, CHANGES IN THE COST OF PURCHASED GAS, THE COST OF CONTRACTUAL GAS STORAGE AND STORAGE TRANSPORTATION, AND THE NET COST OF GAS INJECTED INTO AND WITHDRAWN FROM STORAGE MAY BE PASSED THROUGH TO CUSTOMERS ON SPECIFIED TARIFF RATES AS SET FORTH IN THE APPENDIX A BY MEANS OF A RATE ADJUSTMENT (TRACKING) FACTOR.