Exhibit 99.10 ICC Docket No. 01-0423 Interim Order Entered April 1, 2002 Compliance Filing Work Papers April 11, 2002 Schedule B-1 NR: p 1 of 1 Commonwealth Edison Company Determination of Customer Transition Charge (Summary Page) Based on Market Value Defined in Rider PPO - Power Purchase Option (Market Index) Applicable Period A (June 2002 - May 2003) (All units are in cents per kilowatt-hour) Delivery Base Rate Service Revenue Revenue Market Mitigation (1) (2) (1)(3) Value (4) Amount (5) ------- ------ --------- ---------- (A) (B) (C) (D) Customer Transition Charge Customer Class - ----------------------------------------- Nonresidential Delivery Service Customers With Only Watt-hour Only Meters 11.258 3.124 2.868 0.901 0 kW to and including 25 kW Demand 9.288 1.897 2.776 0.743 Over 25 kW to and including 100 kW Demand 8.344 1.699 2.685 0.668 Over 100 kW to and including 400 kW Demand 7.428 1.368 2.660 0.594 Over 400 kW to and including 800 kW Demand 6.839 1.226 2.617 0.547 Over 800 kW to and including 1,000 kW Demand 6.767 1.125 2.542 0.541 Over 1,000 kW to and including 3,000 kW Demand 6.456 1.095 2.565 0.516 Fixture-included Lighting Nonresidential Delivery Service Customers 13.554 8.283 2.089 1.084 Street Lighting Delivery Service Customers - Dusk to Dawn 3.852 1.608 2.076 0.500 Street Lighting Delivery Service Customers - All Other Lighting 7.172 1.559 2.402 0.574 Railroads Delivery Service Customers (6) Pumping Delivery Service Customers 6.465 1.231 2.518 0.517 June 2002 - Dec 2002 Mitigation Jan 2003 - May CTC Amount (7) 2003 CTC --- ---------- -------- (E)=(A)-(B)-(C)-(D) (F) (G)=(A)-(B)-(C)- (F) Customer Transition Charge Customer Class Nonresidential Delivery Service Customers With Only Watt-hour Only Meters 4.365 1.126 4.140 0 kW to and including 25 kW Demand 3.872 0.929 3.686 Over 25 kW to and including 100 kW Demand 3.292 0.834 3.126 Over 100 kW to and including 400 kW Demand 2.806 0.743 2.657 Over 400 kW to and including 800 kW Demand 2.449 0.684 2.312 Over 800 kW to and including 1,000 kW Demand 2.559 0.677 2.423 Over 1,000 kW to and including 3,000 kW Demand 2.280 0.646 2.150 Fixture-included Lighting Nonresidential Delivery Service Customers 2.098 1.355 1.827 Street Lighting Delivery Service Customers - Dusk to Dawn 0.000 0.500 0.000 Street Lighting Delivery Service Customers - All Other Lighting 2.637 0.717 2.494 Railroads Delivery Service Customers (6) Pumping Delivery Service Customers 2.199 0.647 2.069 <FN> Notes: (1) Transfer from Column (H) and Column (M) of Determination of Customer Transition Charge, on Page 2 to 12 of attached workpapers. (2) Base rate revenues consist of customer, demand, and energy charges. Base rate revenues do not include facility, meter, or other equipment rentals, franchise fees or other franchise cost additions, fuel adjustment clause charges, decommissioning expense adjustment clause charges, taxes, local government compliance clause charges, compensation for energy generated by a person or entity other than ComEd, or Renewable Energy Resources and Coal Technology Development Assistance Charge and Energy Assistance Charge for the Supplemental Low-Income Energy Assistance Fund. (3) The amount of revenue that the Company would receive under Rate RCDS - Retail Customer Delivery Service (Rate RCDS) and Rider ISS - Interim Supply Service (Rider ISS) for standard delivery of energy to customers in the CTC Customer Class. (4) The Market Value for a CTC Customer Class has the same value as the per kilowatt-hour Load Weighted Average Market Value (LWAMV) as defined in Rider PPO - Power Purchase Option (Market Index) for the applicable customer class for Applicable Period A. (5) The mitigation amount as defined in Rate CTC is the greater of 0.5 cents per kilowatt-hour or 8% of the base rate revenue for the calculation period of June 2002 through December 2002. (6) There are two customers in the Railroads class and each customer will have a Customer-specific CTC. (7) The mitigation amount as defined in Rate CTC is the greater of 0.5 cents per kilowatt-hour or 10% of the base rate revenue for the calculation period of January 2003 through May 2003. </FN> ICC Docket No. 01-0423 Interim Order Entered April 1, 2002 Compliance Filing Work Papers April 11, 2002 Schedule B-1 R: p 1 of 1 Commonwealth Edison Company Determination of Residential Customer Transition Charge (Class Summary Page) Based on Market Value Defined in Rider PPO - Power Purchase Option (Market Index) Applicable Period A (June 2002 - May 2003) (All units are in cents per kilowatt-hour) Delivery Base Rate Service Market Mitigation Revenue (1) (2) Revenue (3) Value (4) Amount (5) --------------- ----------- --------- ---------- (A) (B) (C) (D) Customer Transition Charge Customer Class - ----------------------------------------- Residential Delivery Service Customers Single Family Without Space Heat 8.715 3.379 2.790 0.523 Multi Family Without Space Heat 8.961 4.439 2.959 0.538 Single Family With Space Heat 5.836 2.301 2.529 0.350 Multi Family With Space Heat 6.169 2.893 2.624 0.370 Fixture-included Lighting Residential Delivery Service Customers 8.655 8.982 2.178 0.519 June 2002 - Dec 2002 Mitigation Jan 2003 - May 2003 CTC Amount (6) CTC --- ---------- --- (E)=(A)-(B)-(C)-(D) (F) (G)=(A)-(B)-(C)-(F) Customer Transition Charge Customer Class Residential Delivery Service Customers Single Family Without Space Heat 2.023 0.610 1.936 Multi Family Without Space Heat 1.025 0.627 0.936 Single Family With Space Heat 0.656 0.409 0.597 Multi Family With Space Heat 0.282 0.432 0.220 Fixture-included Lighting Residential Delivery Service Customers 0.000 0.606 0.000 <FN> Notes: (1) Based on three years of residential historical data ending January 2002 and residential rates in effect beginning October 1, 2001. (2) Base rate revenues consist of customer service and energy charges. Base rate revenues do not include facility, meter, or other equipment rentals, franchise fees or other franchise cost additions, fuel adjustment clause charges, decommissioning expense adjustment clause charges, taxes, local government compliance class charges, compensation for energy generated by a person or entity other than ComEd, or Renewable Energy Resources and Coal Technology Development Assistance Charge and Energy Assistance Charge for the Supplemental Low-Income Energy Assistance Fund. (3) The amount of revenue that the Company would receive under Rate RCDS - Retail Customer Delivery Service (Rate RCDS) and Rider ISS - Interim Supply Service (Rider ISS) for standard delivery of energy to customers in the CTC Customer Class. (4) The Market Value for a CTC Customer Class has the same value as the per kilowatt-hour Load Weighted Average Market Value (LWAMV) as defined in Rider PPO - Power Purchase Option (Market Index) for the applicable delivery service customer class. (5) The residential mitigation amount as defined in Rate CTC is 6% of the base rate revenue for the calculation period of June 2002 through December 2002. (6) The residential mitigation amount as defined in Rate CTC is 7% of the base rate revenue for the calculation period of January 2003 through May 2003. </FN>