Appendix B Gas Sales And Portfolio Administration Agreement Original Page No. 1 October 1, 1996 APPENDIX B - Buyer's Maximum Quantities Maximum Daily Quantities (in Dth) Central/ Month North/East Terre Haute South Greensburg October 251,000 112,000 37,600 5,060 November 362,000 181,000 45,300 5,570 December 500,000 230,000 69,100 8,000 January 507,000 231,000 70,600 8,310 February 465,000 230,000 62,400 7,360 March 401,000 192,000 51,000 5,980 April 252,000 120,000 31,500 3,560 May 208,000 99,000 20,000 2,640 June 152,000 74,000 15,200 2,620 July 94,000 42,000 5,200 1,570 August 120,000 56,000 9,600 1,990 September 185,000 91,000 20,600 3,250 Maximum Seasonal Quantities (in Dth) Central/ Month North/East Terre Haute South Greensburg Summer 1996 11,202,130 5,850,260 1,676,840 267,145 Winter 1996-97 38,579,050 21,473,920 5,513,670 697,710 Appendix B Gas Sales And Portfolio Administration Agreement Original Page No. 2 October 1, 1996 APPENDIX B - Buyer's Maximum Quantities Amendment Seller and Buyer agree that this Appendix B may be amended as provided in this Agreement, which amendment ultimately will be memorialized in a revised Appendix B. PROLIANCE ENERGY, LLC INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Timothy M. Hewitt Carl L. Chapman Timothy M. Hewitt Its: President Its: Vice President Appendix C Gas Sales And Portfolio Administration Agreement Original Page No. 1 October 1, 1996 Appendix C - Portfolio Information I. Contracts and Contract Rates The applicable demand costs shall be determined based upon the rates and charges specified in each Transporter's Tariff, including any applicable direct bills, surcharges, or as other costs specified by the sheets identified below, or other applicable sheets, as all of those sheets may be in effect from time to time, and costs arising under applicable agreements, for the applicable term of these agreements, including the agreements identified below, as well as this Agreement. While Seller and Buyer agree that the identified tariff sheets and agreements are intended to be a complete listing of the applicable tariff sheets and applicable agreements, they further agree that the omission of the reference of one or more sheets or agreements from that list will not affect Buyer's obligation to Seller for rates, charges and costs incurred thereunder. Seller shall provide to Buyer all Transporter refunds for the applicable terms which are received by Seller relative to Contracts or Contract Rates referenced below or relative to any agreements referencing the contracts below. Contract No. Contract Rate 11713 Sheet No. 11 11714 Sheet No. 5 11715 Sheet No. 5 11716 Sheet No. 5 11718 Sheet No. 5 11719 Tariff Letter 11720 Tariff Letter 11721 Sheet No. 5 12044 Sheet No. 11 12045 Sheet No. 5 X-22 Sheet No. 13 Sheet No. 14 Sheet No. 15 Sheet No. 16 03950 Sheet No. 5 Sheet No. 17 Sheet No. 17A Sheet No. 18 Appendix C Gas Sales And Portfolio Administration Agreement Original Page No. 2 October 1, 1996 Appendix C - Portfolio Information Contract No. Contract Rate 19100 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 18 19110 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 18 20250 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 18 20300 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 18 32300 Sheet No. 10 33050 Sheet No. 10 70300 Sheet No. 68G N0325 Sheet No. 10 T3780 Sheet No. 11 N0420 Sheet No. 10 T3739 Sheet No. 11 T9998 Sheet No. 11 800171 Sheet No. 35 830034 Sheet No. 30 400109 Sheet No. 43 WSS Appendix I PSS Appendix I Appendix C Gas Sales And Portfolio Administration Agreement Original Page No. 3 October 1, 1996 Appendix C - Portfolio Information II. Transportation Credit 1. Seller shall provide to Buyer, as a credit against the Contract Rates, a Transportation Credit ("TC") for the sale from the Buyer to Seller of projected available annual portfolio entitlements. 2. The Transportation Credit shall be calculated from time to time to reflect changes in projected available annual entitlements, based on the following formula: TC = Base TC x Projected Available Annual Entitlements ---------------------------------------- Base Available Annual Entitlements Where: a. Base TC = $1,864,000 b. Base Available Annual Entitlements = 35,913,000 Dth c. Projected Available Annual Entitlements = Total Entitlements - Normal Demand (i) Total Entitlements are the sum of the quantities of longhaul pipeline transportation entitlements reserved by Buyer. (ii) Normal Demand is the projected normal weather quantity of Buyer's firm longhaul pipeline deliveries for firm customers. 3. The TC shall be divided among months based upon the projected available monthly entitlements. Amendment Seller and Buyer agree that this Appendix C may be amended from time to time by mutual agreement of the Parties, which ultimately will be memorialized in a revised Appendix C. PROLIANCE ENERGY LLC INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Timothy M. Hewitt Carl L. Chapman Timothy M. Hewitt Its: President Its: Vice President Appendix D Gas Sales And Portfolio Administration Agreement First Revised Page No. 1 October 1, 1996 APPENDIX D - Supplier Reservation Costs Supplier Reservation Costs October 1, 1996 through October 31, 1997 I. Reserved Commodity Quantities a. Monthly Baseload Reserved Quantity (dth) System Central/ Month North/East Terre Haute Greensburg South October, 1996 88,000 33,000 2,500 7,000 November, 1996 75,000 33,000 2,000 9,000 December, 1996 105,000 40,000 2,000 11,000 January, 1997 105,000 60,000 3,000 14,000 February, 1997 105,000 60,000 2,500 14,000 March, 1997 65,000 40,000 2,000 10,000 April, 1997 105,000 45,000 2,500 7,000 May, 1997 88,000 33,000 2,500 7,000 June, 1997 88,000 33,000 2,500 7,000 July, 1997 88,000 33,000 2,500 7,000 August, 1997 88,000 33,000 2,500 7,000 September, 1997 88,000 33,000 2,500 7,000 October, 1997 88,000 33,000 2,500 7,000 Appendix D Gas Sales And Portfolio Administration Agreement First Revised Page No. 2 October 1, 1996 APPENDIX D - Supplier Reservation Costs b. Daily Swing Reserved Quantity (dth) System Central/ Month North/East Terre Haute Greensburg South October, 1996 135,578 12,000 1,100 12,000 November, 1996 148,578 83,000 4,616 31,000 December, 1996 118,578 92,000 4,616 34,327 January, 1997 118,578 72,000 3,616 31,327 February, 1997 118,578 72,000 4,116 31,327 March, 1997 158,578 79,000 4,616 35,327 April, 1997 118,578 0 1,150 14,066 May, 1997 135,578 12,000 1,150 14,066 June, 1997 95,000 12,000 400 13,000 July, 1997 45,000 15,000 500 7,000 August, 1997 75,000 12,000 500 8,000 September, 1997 135,578 12,000 500 12,000 October, 1997 135,578 12,000 1,100 12,000 II. Applicable Reservation Rates (dth/day) System Winter Months (Nov.-Mar.) Summer Months (Apr.-Oct.) Monthly Daily Monthly Daily Index Index Index Index Reserved Reserved Reserved Reserved Quantity Quantity Quantity Quantity North/East $0.0281 $0.0171 $0.0092 $0.0164 Central/Terre $0.0180 $0.0345 $0.0154 $0.0221 Haute Greensburg $0.0111 $0.0197 $0.0111 $0.0167 South $0.0180 $0.0345 $0.0154 $0.0221 Appendix D Gas Sales And Portfolio Administration Agreement First Revised Page No. 3 October 1, 1996 APPENDIX D - Supplier Reservation Costs Assignment/Agency Administration of Supply Agreements Buyer and Seller agree that quantities reserved under supply reservation contracts entered into by Buyer prior to April 1, 1996, and for which Seller has accepted assignment or agency administration duties, shall be included in the Reserved Commodity Quantities with Applicable Reservation Rates as set forth in the original supply reservation contracts. Amendment Seller and Buyer agree that this Appendix D may be amended from time to time by mutual agreement of the Parties, which ultimately will be memorialized in a revised Appendix D. PROLIANCE ENERGY, LLC INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Timothy M. Hewitt Carl L. Chapman Timothy M. Hewitt Its: President Its: Vice President Appendix E Gas Sales And Portfolio Administration Agreement Original Page No. 1 October 1, 1996 Appendix E- Commodity Purchases This Appendix E addresses the gas supply and other variable costs applicable to Nominated Daily Quantities and Balancing Quantities as identified below. For Monthly Baseload Purchases: Buyer shall pay to Seller each Contract Month an amount determined by multiplying the monthly baseload quantities of Gas scheduled for Buyer's purchase under this Agreement during the Contract Month, by a price per MMBtu determined using the first monthly index from Inside FERC's GAS MARKET REPORT, in the table "PRICES OF SPOT GAS DELIVERED TO INTERSTATE PIPELINES" for the applicable zone, specified below, for the applicable month, plus all other applicable variable costs as identified below shall apply. For Daily Swing Purchases: Buyer shall pay to Seller each Contract Month an amount determined by summing all applicable "Daily Amounts" for the Contract Month. A "Daily Amount" shall be calculated for each day during the Contract Month for which daily swing quantities of Gas have been confirmed for purchase. The "Daily Amounts" shall be determined by multiplying (a) the confirmed swing quantities of gas scheduled for the particular day of the Contract Month, by (b) a price per MMBtu determined using the Daily Midpoint Price reported in Gas Daily, in the table "DAILY PRICE SURVEY", for the applicable zone, specified below, for purchases for the applicable day. In addition all other applicable variable costs as identified below shall apply. For Other Purchases: For any purchases not covered by a specified pricing method, pricing shall be as negotiated and mutually agreed to in writing by the Parties. For Summer Storage Refill: For summer refill of leased storage, Buyer shall pay to Seller an amount based on averaging the seven summer monthly indices for the applicable supply area, and based upon presuming storage refill quantities to be equally split between the summer months. For summer refill of company storage, the parties will agree on the extent to which an index average method will be used, after consideration of the operational scheduling needs of company storage. In addition, all other applicable variable costs as identified below shall apply. Appendix E Gas Sales And Portfolio Administration Agreement Original Page No. 2 October 1, 1996 Appendix E- Commodity Purchases For Storage Withdrawals: For quantities of storage withdrawals for which Buyer has previously paid for commodity, applicable storage withdrawal variable costs as identified below shall apply. For Applicable Indices: System Applicable Monthly Indices North/East PEPL - Texas, Oklahoma ANR - Louisiana Central/Terre Haute Texas Gas - Zone 1 Texas Gas - Zone SL South Texas Gas - Zone 1 Texas Gas - Zone SL Greensburg TETCO - East Louisiana TETCO - West Louisiana TETCO - East Texas TETCO - South Texas Appendix E Gas Sales And Portfolio Administration Agreement Original Page No. 3 October 1, 1996 APPENDIX E- Commodity Purchases (Continued) System Applicable Daily Indices North/East PEPL - Oklahoma ANR - Louisiana - Onshore South Central/Terre Haute Texas Gas SL - Louisiana - Onshore South Texas Gas (entire Z1) - East Texas - North La. Area South Texas Gas SL - Louisiana - Onshore South Texas Gas (entire Z1) - East Texas - North La. Area Greensburg/Westport TETCO (ELA) - Louisiana - Onshore South TETCO (WLA) - Louisiana - Onshore South TETCO (ETX) - East Texas - North La. Area TETCO (STX) - South - Corpus Christi Appendix E Gas Sales And Portfolio Administration Agreement Original Page No. 4 October 1, 1996 APPENDIX E- Commodity Purchases - Other Variable Costs The other variable costs applicable to Nominated Daily Quantities and Balancing Quantities shall be determined based upon the rates and charges applicable under each transporter's tariff, including the sheets identified below, as well as other applicable sheets, as all of those sheets may be in effect from time to time, and costs arising under applicable agreements, including the agreements identified below, as well as this Agreement. North/East PEPL Contract No. Contract Rate 11713 Sheet No. 11 11714 Sheet No. 5 11715 Sheet No. 5 11716 Sheet No. 5 11717 Sheet No. 5 11719 Tariff Letter 11720 Tariff Letter 11721 Sheet No. 5 12044 Sheet No. 11 12045 Sheet No. 5 Appendix E Gas Sales And Portfolio Administration Agreement Original Page No. 5 October 1, 1996 APPENDIX E - Commodity Purchases - Other Variable Costs North/East ANR Contract No. Contract Rate X-22 Sheet No. 13 Sheet No. 14 Sheet No. 15 Sheet No. 16 Sheet No. 19 03950 Sheet No. 5 Sheet No. 17 Sheet No. 17A Sheet No. 19 19100 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 19 19110 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 19 20250 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 19 20300 Sheet No. 7 Sheet No. 17 Sheet No. 17A Sheet No. 19 Appendix E Gas Sales And Portfolio Administration Agreement Original Page No. 6 October 1, 1996 APPENDIX E - Commodity Purchases - Other Variable Costs North/East (Cont'd) ANR Contract No. Contract Rate 32300 Sheet No. 10 Sheet No. 19 33050 Sheet No. 10 Sheet No. 19 70300 Sheet No. 68G Sheet No. 68H Central/Terre Haute System Texas Gas Z-3 Contract No. Contract Rate N0325 Sheet No. 10 Sheet No. 14 T3780 Sheet No. 11A Sheet No. 14 T9998 Sheet No. 11A Sheet No. 14 South System Texas Gas Z-4 Contract No. Contract Rate N0420 Sheet No. 10 T3739 Sheet No. 11A Appendix E Gas Sales And Portfolio Administration Agreement Original Page No. 7 October 1, 1996 APPENDIX E - Commodity Purchases - Other Variable Costs Greensburg System Texas Eastern Contract No. Contract Rate 800171 Sheet No. 36 Sheet No. 126 Sheet No. 127 Sheet No. 128 Sheet No. 129 830034 Sheet No. 31 Sheet No. 126 Sheet No. 127 Sheet No. 128 Sheet No. 129 400109 Sheet No. 43 Sheet No. 126 Sheet No. 127 Sheet No. 128 Sheet No. 129 While Seller and Buyer agree that the identified tariff sheets and agreements are intended to be a complete listing of the applicable tariff sheets and applicable agreements, they further agree that the omission of the reference of one or more sheets or agreements from that list will not affect Buyer's obligation to Seller for rates, charges and costs incurred thereunder. Amendment Seller and Buyer agree that this Appendix E may be amended from time to time by mutual agreement of the Parties, which ultimately will be memorialized in a revised Appendix E. PROLIANCE ENERGY, LLC INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Timothy M. Hewitt Carl L. Chapman Timothy M. Hewitt Its: President Its: Vice President Appendix G Gas Sales And Portfolio Administration Agreement Original Page No. 1 October 1, 1996 G- Notices Invoice Information: Buyer: Seller: Indiana Gas Company, Inc. J. Groth Corporate Accounting ProLiance Energy, LLC Attn.: Judy Shular 135 North Pennsylvania Street 1630 North Meridian Street Suite 800 Indianapolis, IN 46202 Indianapolis, IN 46204-2482 (317) 321-0461 (317) 231-6808 Payments: Buyer: Seller: National City Bank Key Bank For the Account of: For the Account of: Indiana Gas Company, Inc. ProLiance Energy, LLC ABA #041001039 ACCT #6001805116 Supply Plans/Operational/Force Majeure: Buyer: Seller: Supply Plans Supply Plans Chris Kershner Brian Azman (317) 321-0583 (317) 231-6830 Operational Operational Randy Gary Stephen Miner (317) 321-0507 (317) 231-6828 Force Majeure Force Majeure Randy Gary (317) 321-0507 Brian Azman - (317) 231-6830 Frank Lindsey (317) 321-0334 Stephen Miner - (317) 231-6828 Gas Controller on Duty (317) 321-0535 John Talley - (317) 231-6806 Indiana Gas Company, Inc. ProLiance Energy, LLC 1630 North Meridian Street 135 North Pennsylvania Street Indianapolis, IN 46202 Suite 800 (317) 321-0787 (Telecopy) Indianapolis, Indiana 46204-2482 (317) 231-6901 (Telecopy) All Other Notices: Buyer: Seller: Gas Control Department ProLiance Energy , LLC Attn.: Randy Gary Attn: John R. Talley 1630 North Meridian Street 135 North Pennsylvania Street Indianapolis, IN 46202 Suite 800 Indianapolis, Indiana 46204-2482 Appendix G Gas Sales And Portfolio Administration Agreement Original Page No. 2 October 1, 1996 APPENDIX G- Notices (Continued) Amendment Seller and Buyer agree that this Appendix G may be amended from time to time as provided in this Agreement, which amendment ultimately will be memorialized in a revised Appendix G. PROLIANCE ENERGY, LLC INDIANA GAS COMPANY, INC. By: /s/Carl L. Chapman By: /s/Timothy M. Hewitt Carl L. Chapman Timothy M. Hewitt Its: President Its: Vice President