FACILITY LEASE AGREEMENT Dated as of August 24, 2000 between KEYSTONE LESSOR GENCO LLC, as Owner Lessor and RELIANT ENERGY MID-ATLANTIC POWER HOLDINGS, LLC (formerly known as Sithe Pennsylvania Holdings, LLC), as Facility Lessee KEYSTONE FACILITY...

FACILITY LEASE AGREEMENT Dated as of August 24, 2000 between KEYSTONE LESSOR GENCO LLC, as Owner Lessor and RELIANT ENERGY MID-ATLANTIC POWER HOLDINGS, LLC (formerly known as Sithe Pennsylvania Holdings, LLC), as Facility Lessee KEYSTONE FACILITY CERTAIN OF THE RIGHT, TITLE AND INTEREST OF THE OWNER LESSOR IN AND TO THIS LEASE AND THE RENT DUE AND TO BECOME DUE HEREUNDER HAVE BEEN ASSIGNED AS COLLATERAL SECURITY TO, AND ARE SUBJECT TO A SECURITY INTEREST IN FAVOR OF, BANKERS TRUST COMPANY, NOT IN ITS INDIVIDUAL CAPACITY BUT SOLELY AS LEASE INDENTURE TRUSTEE UNDER A LEASE INDENTURE OF TRUST, MORTGAGE AND SECURITY AGREEMENT DATED AS OF AUGUST 24, 2000 BETWEEN SAID LEASE INDENTURE TRUSTEE, AS SECURED PARTY, AND THE OWNER LESSOR, AS DEBTOR. SEE SECTION 21 FOR INFORMATION CONCERNING THE RIGHTS OF THE ORIGINAL HOLDER AND THE HOLDERS OF THE V ARlOUS COUNTERPARTS HEREOF. HOU01:587609.2 Keystone Facility Lease

TABLE OF CONTENTS Page SECTION I DEFINITIONS ........................................................................................................... 4 SECTION 2 LEASE OF THE FACILITY INTEREST ................................................................. 4 Section 2.1 Lease .................................................................................................................. 4 SECTION 3 FACILITY LEASE TERM AND RENT................................................................... 4 Section 3.1 Section 3.2 Section 3.3 Section 3.4 Section 3.5 Section 3.6 [Intentionally Omitted]....................................................................................... 4 Basic Lease Tenn ............................................................................................... 4 Rent. ................................................................................................................... 5 Supplemental Lease Rent................................................................................... 5 Adjustment of Lease Schedules ......................................................................... 6 Manner of Payments.......................................................................................... 8 SECTION 4 DISCLAIMER OF WARRANTIES; RJGHT OF QUIET ENJOYMENT ............... 9 Section 4.1 Section 4.2 Disclaimer of Warranties................................................................................... 9 Quiet Enjoyment .............................................................................................. I 0 SECTION 5 RETURN OF FACILITY INTEREST .................................................................... 10 Section 5.1 Section 5.2 Section 5.3 Return.............................................:................................................................. I 0 Condition Upon Return .................................................................................... II Environmental Reports..................................................................................... 12 SECTION 6 LIENS ...................................................................................................................... 13 SECTION 7 MAINTENANCE; REPLACEMENTS OF COMPONENTS................................. 13 Section 7.1 Section 7.2 Section 7.3 Maintenance ..................................................................................................... 13 Replacement of Components ........................................................................... 14 Environmental Matters..................................................................................... 15 SECTION 8 MODIFICATIONS .................................................................................................. 16 Section 8.1 Section 8.2 Section 8.3 Required Modifications.................................................................................... 16 Optional Modifications .................................................................................... 17 Title to Modifications....................................................................................... 17 SECTION 9 NET LEASE ............................................................................................................ 18 SECTION 10 EVENTS OF LOSS ............................................................................................... 19 Section 10.1 Occurrence of Events of Loss .......................................................................... 19 Section 10.2 Payment of Termination Value; Termination of Periodic Lease Rent............. 20 HOUOJ :587609.2

Section 10.3 Rebuild or Replace ........................................................................................... 22 Section 10.4 Application of Payments Not Relating to an Event of Loss............................ 24 SECTION 11 INSURANCE ......................................................................................................... 25 Section 11.1 Section 11.2 Section 11.3 Section 11.4 Section 11.5 Section 11.6 Section 11.7 Property Insurance ........................................................................................... 25 Liability Insurance ........................................................................................... 25 Provisions with Respect to Insurance.............................................................. 25 Reports ............................................................................................................. 27 Additional Insurance by Owner Lessor............................................................ 27 Amendment of Requirements.......................................................................... 27 Application of Insurance Proceeds................................................................... 28 SECTION 12 INSPECTION ........................................................................................................ 30 SECTION 13 TERMINATION OPTION FOR BURDENSOME EVENTS............................... 31 Section 13.1 Section 13.2 Section 13.3 Section 13.4 Election to Terminate ....................................................................................... 31 Solicitation of QualifYing Cash Bids; Payments Upon Termination ............... 31 Procedure for Exercise of Termination Option ................................................ 32 Assumption of the Notes .................................................................................. 33 SECTION 14 TERMINATION FOR OBSOLESCENCE; PARTIAL RELEASE OF INTERESTS..................................................................................................... 34 Section 14.1 Section 14.2 Section 14.3 Section 14.4 Section 14.5 Section 14.6 Termination ...................................................................................................... 34 Solicitation of Offers........................................................................................ 34 Right of Owner Lessor to Retain the Owner Lessor's Interest......................... 35 Procedure for Exercise of Termination Option ................................................ 36 Certain Conditions to Termination .................................................................. 37 Partial Release oflnterest; Further Assurances ............................................... 37 SECTION 15 LEASE RENEWAL............................................................................................... 39 Section 15.1 Section 15.2 Section 15.3 Section 15.4 Section 15.5 Section 15.6 First Wintergreen Renewal Lease Term .......................................................... 39 Second Wintergreen Renewal Lease Term ...................................................... 39 Fair Market Value Renewal Lease Terms........................................................ 40 Renewal Lease Rent for the Renewal Lease Terms......................................... 40 Determination of Fair Market Rental Value.................................................... 41 Termination Value During Renewal Lease Terms........................................... 41 HOUO 1:587609.2

SECTION 16 EVENTS OF DEFAULT ....................................................................................... 42 SECTION 17 REMEDIES ............................................................................................................ 45 Section 17.1 Section 17.2 Section 17.3 Remedies for Lease Event of Default .............................................................. 45 Cumulative Remedies ...................................................................................... 47 No Delay or Omission to be Construed as Waiver .......................................... 48 SECTION 18 SECURITY INTEREST AND INVESTMENT OF SECURITY FUNDS........... 48 SECTION 19 FACILITY LESSEE'S RIGHT TO SUBLEASE .................................................. 48 SECTION 20 OWNER LESSOR'S RIGHT TO PERFORM ...................................................... 49 SECTION 21 SECURITY FOR OWNER LESSOR'S OBLIGATION TO THE LEASE INDENTURE TRUSTEE ................................................................................ 50 SECTION 22 WAIVER OF RIGHT TO PARTITION ................................................................ 50 SECTION 23 MISCELLANEOUS .............................................................................................. 51 Section 23.1 Section 23.2 Section 23.3 Section 23.4 Section 23.5 Section 23.6 Section 23.7 Section 23.8 Section 23.9 Section 23.10 Section 23.II Section 23.12 Section 23.13 Amendments and Waivers ............................................................................... 51 Notices.............................................................................................................. 51 Survival ............................................................................................................ 52 Successors and Assigns.................................................................................... 52 "True Lease" .................................................................................................... 52 Governing Law................................................................................................. 52 Severability ...................................................................................................... 52 Counterparts ..................................................................................................... 53 Headings and Table of Contents ...................................................................... 53 Further Assurances ...................................................................................... 53 Effectiveness ................................................................................................ 53 Limitation of Liability ................................................................................. 53 Measuring Life............................................................................................. 53 SCHEDULE 1-A-PERIODIC LEASE RENT SCHEDULE 1-B-ALLOCATED RENT SCHEDULE 1-C-SECTION 467 LOAN SCHEDULE 2-TERMINATION VALUES EXHIBIT A-FACILITY SITE DESCRIPTION EXHIBIT B -FACILITY DESCRIPTION HOUOJ :587609.2

FACILITY LEASE AGREEMENT This FACILITY LEASE AGREEMENT dated as of August 24, 2000 (as amended, supplemented or otherwise modified from time to time and in accordance with the provisions hereof, this "Facility Lease"), between KEYSTONE LESSOR GENCO LLC, a Delaware limited liability company (together with its successors and permitted assigns, the "Owner Lessor") created for the benefit of PSEGR Keystone Generation, LLC (together with its successors and permitted assigns, the "Owner Participant"), and RELIANT ENERGY MID-ATLANTIC POWER HOLDINGS, LLC (formerly known as Sithe Pennsylvania Holdings, LLC), a Delaware limited liability company (together with its successors and permitted assigns, the "Facility Lessee"). WITNESSETH: WHEREAS, the Facility Site is that certain land located in Plum Creek Township, ▇▇▇▇▇▇▇▇▇ County and Indiana County, Pennsylvania and more particularly described in Exhibit A attached hereto; WHEREAS, the Facility is a 1711 MW coal fired steam turbine electric generating station located on the Facility Site, including any and all additional improvements and fixtures located on or under the Facility Site, and more particularly described in Ex hibit B attached hereto; WHEREAS, the Facility does not include the Facility Site or any part thereof, and no part of the Facility Site is being leased to the Facility Lessee hereunder; WHEREAS, rights and obligations as tenants-in-common of the co-owners of the Facility and the Facility Site and all improvements constructed, and all personal property situated, thereon are governed by the Owners Agreement; WHEREAS, pursuant to that certain Site Lease and Sublease Agreement, dated of even date hereof (as amended, supplemented or otherwise modified from time to time in accordance with the provisions thereof, the "Site Lease and Sublease"), the Facility Lessee has leased a 16.67% ownership interest in the Facility Site, as tenant-in-common with the other owners of the Facility Site, with the right to nonexclusive possession thereof (the "Ground Interest") to the Owner Lessor; and the Owner Lessor simultaneously therewithhas subleased the Ground Interest to the Facility Lessee for the term equal to the term of this Facility Lease, including any renewals hereof; WHEREAS, pursuant to the Deed and ▇▇▇▇ of Sale dated of even date hereof, the Owner Lessor has acquired from the Facility Lessee a 16.67% undivided ownership interest in the Facility, as tenant-in-common with the other owners of the Facility, with the right to nonexclusive possession thereof (the "Facility Interest"); HOUOI :587609.2. Keystone Facility Lease I

WHEREAS, pursuant to this Facility Lease, the Owner Lessor will lease the Facility Interest to the Facility Lessee for the Basic Lease Term and the Renewal Lease Terms, if any, provided herein. NOW, THEREFORE, in consideration of the foregoing premises, the mutual agreements herein contained, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: NOTICE The Facility Lessee acknowledges the following with respect to disposal of materials on the Facility Site: Asbestos insulation, and other asbestos containing materials have been disposed in the active East Valley Ash landfill (Parcel A) pursuant to PaDEP solid waste permit #300837. Additional information regarding the quantities and locations within the landfill of such disposal is in the possession of the PaDEP. • Wastewater treatment sludges which may contain hazardous substances were removed during cleaning of the various on-site wastewater impoundments and were disposed of at the active East Valley Ash landfill (Parcels A) and the closed (in 1985) Old Ash Landfill (Parcel B) pursuant to PaDEP solid waste permits #300837 and #300515 via blending with fly ash and bottom ash prior to final placement and compaction. Soil and groundwater sampling in the vicinity of Parcels A and B detected concentrations of metals. • The electric generation and transmission equipment at the site has, at times, included equipment with dielectric fluids which contained polychlorinated biphenyls (PCBs). Spillage of these fluids may have occurred in these areas (Parcels F, G, and H). A soil sample taken in the substation area (Parcel F) detected concentrations ofPCBs of .028 parts per million. • Spills of used oils which may have contained hazardous substances have occurred at or near the mobile and stationaryoperating equipment and storage tanks associated with the electric generating facility, including, but not limited to, air compressors, fans, ▇▇▇▇▇, and seal oil systems. The spills were remediated utilizing one or more of the following collection methods: oil absorbent materials, bulk collection of free oils, or mechanical removal of residual materials including soils and water. Residual materials were generally disposed through either off-site disposal services or incineration in the utility boilers. Two unlined wastewater storage impoundments (Parcel C) have been used for the storage of high and low pH waste waters prior to final treatment. • Three closed settling ponds (Parcels I, J, and K) formerly received storm water runoff which may have contained hazardous substances. Keystone Facility Lease 2 HOUOI :587609.2.

• On June 9, 1983, approximately I 0 gallons of transformer oil which contained less than 50 parts per million PCBs spilled from a generator start-up transformer in the substation area (Parcel F) while a valve was being changed. The residual materials were contained and disposed of off-site. • On March 28, 1990, 300 gallons of Vertan boiler cleaning solution (a chelant) was spilled into the site storm drain system. The material was contained and neutralized in the Facility's wastewater systems. • On February 23, 1993, approximately 400 gallons of sodium hypochlorite was spilled on to the soil surrounding the Unit #2 Circulating Water Pumphouse (Parcel D). The material was cleaned up using absorbents and the affected material was disposed off-site. • On May 26, 1995, 280 gallons of Sodium Nitrate leaked into the Station floor drain system and was eventually treated at the Industrial Waste Treatment Plant prior to discharge pursuant to an NPDES permit. • Herbicides have been used to control the growth of vegetation across the site at various times including, but not limited to, the areas within the main fuel oil storage tanks' spill containment, and within the substation (Parcel F) and underneath the transmission lines. The following investigations have been conducted to identifY potential contamination on the property: • "Final Addendum Phase I Environmental Site Assessment GPU Energy Keystone Electric Generating ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇▇▇," performed by ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇; November 10, 1999. "Final Phase I Environmental Site Assessment GPU Energy, Keystone Electric Generating ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇▇▇," performed by ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ International-Americas; April 6, 1998. • "Phase II Investigations GPU Keystone Electric Generating ▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇▇▇▇," performed by ▇▇▇▇▇▇▇▇-▇▇▇▇▇ International-Americas; July 1998. • "Update of Phase I Environmental Site Assessment Report (April 6, 1998) and Report of Phase II Site Investigation (July 1998), Keystone Electric Generating Station", performed by ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇; December 7, 1999. • "Addendum to Phase I Environmental Site Assessment Report (April 1998); GPU Shawville Generating Station", performed by ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇; November 22, 1999. HOU01:587609.2. Keystone Facility Lease 3

• "Update to Phase I Environmental Site Assessment Report (April 1, 1998); Report of Phase II Investigation (July 1998); and Letter Addendum to Phase I Environmental Assessment Report (November ▇▇▇▇), ▇▇▇▇▇▇▇▇▇ Coal Stream Electric Generating Station", performed by ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇; December 7, 1999. SECTION I DEFINITIONS Unless the context hereof otherwise requires, capitalized terms used in this Facility Lease, including those in the recitals, and not otherwise defined herein shall have the respective meanings set forth in Appendix A to the Participation Agreement dated as of August 24, 2000 among the Facility Lessee, the Owner Lessor, the Owner Participant, Wilmington Trust Company, in its individual capacity and as Lessor Manager, and Bankers Trust Company, in its individual capacity and as Lease Indenture Trustee and as Pass Through Trustee. The general provisions of Appendix A to the Participation Agreement shall apply to the terms used in this Facility Lease and specifically defined herein. SECTION 2 LEASE OF THE FACILITY INTEREST Section 2.1 Lease. Upon the terms and conditions set forth herein, the Owner Lessor hereby leases the Facility Interest to the Facility Lessee, and the Facility Lessee hereby leases the Facility Interest from the Owner Lessor for the Basic Lease Term and, subject to the Facility Lessee's exercise of the renewal option or options in Section 15, one or more Renewal Lease Terms. The Facility Lessee and the Owner Lessor understand and agree that this Facility Lease is subject to those encumbrances set forth in the Title Policy. The Facility Interest shall be subject to the terms of this Facility Lease from the date on which this Facility Lease is executed and delivered. SECTION 3 FACILITY LEASE TERM AND RENT Section 3.1 [Intentionally Omitted]. Section 3. 2 Basic Lease Term. The basic lease term of this Facility Lease for the Facility Interest (the "Basic Lease Term") shall commence on the Closing Date and shall terminate at 11:59 p.m. (New York City time) on May 24, 2034 (the "Lease Expiration Date"), subject to earlier termination pursuant to Section 10, 13, 14 or 17. Keystone Facility Lease 4 HOUOL587609.2.

Section 3.3 Rent. (a) The Facility Lessee hereby agrees to pay to the Owner Lessor lease rent payable with respect to the Basic Lease Term ("Periodic Lease Rent") for the lease of the Facility Interest throughout the Basic Lease Term in installments payable on the dates and in the amounts as indicated on Schedule 1-A hereto (as adjusted in accordance with Section 3.5). All Periodic Lease Rent to be paid pursuant to this Section 3.3 shall be payable in the manner set forth in Section 3.6. (b) The Periodic Lease Rent allocated to each period for the use by the Facility Lessee shall be an amount as set forth in Schedule 1-B hereof, as adjusted in accordance with Section 3.5 (the "Allocated Rent"). Notwithstanding that Periodic Lease Rent is payable in accordance with Section 3.3(a), the Allocated Rent calculated pursuant to this Section 3.3(b) shall represent and be the amount of Periodic Lease Rent for which the Facility Lessee becomes liable on account of the use of the Facility Interest for each calendar year included in whole or in part of the Lease Term. (c) The allocation of Periodic Lease Rent to each Rent Payment Period as provided in Section 3.3(b) constitutes a specific allocation of fixed rent within the meaning of Treasury Regulation 1.467-l(c)(2)(ii) with the effect that the Owner Lessor and the Facility Lessee, on any federal income tax returns filed by them (or on any return on which their income is included), shall accrue the amounts of rental income and rental expense, respectively, set forth for each Rent Payment Period set forth on Schedule 1-B. The difference between the cumulative amount of Periodic Lease Rent paid by the Facility Lessee (as set forth in paragraph (a) of this Section 3.3) and the cumulative amount of Periodic Lease Rent allocated (as set forth in paragraph(b) of this Section3.3), shall be considered the amount of the "Section467 Loan" as set forth on Schedule 1-C hereof. If the Section 467 Loan balance is positive, such amount ("Lessor Section 467 Loan Balance") represents a loan from the Facility Lessee to the Owner Lessor; if the Section 467 Loan Balance is negative, such amount ("Lessee Section 467 Loan Balance") represents a loan from the Owner Lessor to the Facility Lessee. If there shall be a Lessor Section 467 Loan Balance, the Owner Lessor shall deduct interest expense and the Facility Lessee shall accrue interest income in an amount equal to the amount set forth for such Rent Payment Period on Schedule 1-C ("Lessor Section 467 Interest"). If there shall be a Lessee Section 467 Loan Balance, the Owner Lessor shall accrue interest income and the Facility Lessor shall deduct interest expense in an amount equal to the amount set forth for such Rent Payment Period on Schedule 1-C ("Lessee Section 467 Interest"). In no event shall any principal or interest on any Section 467 Loan be separately payable; all Section 467 Loan principal and interest is already included as part of Periodic Lease Rent and Termination Value and is payable as a portion of the amounts set forth under the heading "Periodic Lease Rent" on Schedule 1-A or under the heading "Termination Value" on Schedule 2. Section 3.4 Supplemental Lease Rent. The Facility Lessee also agrees to pay to the Owner Lessor, or to any other Person entitled thereto as expressly provided herein or in any other Operative Document, as appropriate, any and all Supplemental Lease Rent (including any Make Whole Premium or Change of Control Premium, if any), promptly as the same shall become due and owing, or where no due date is specified, promptly after demand by the Person entitled thereto, and in the event of any failure on the part of the Facility Lessee to pay any Keystone Facility Lease 5 HOUOl:587609.2.

Supplemental Lease Rent, the Owner Lessor shall have all rights, powers and remedies provided for herein or by law or equity or otherwise for the failure to pay Periodic Lease Rent. The Facility Lessee will also pay as Supplemental Lease Rent, to the extent permitted by Applicable Law, an amount equal to interest at the applicable Overdue Rate on any part of any payment of Periodic Lease Rent not paid when due for any period for which the same shall be overdue and on any Supplemental Lease Rent not paid when due (whether on demand or otherwise) for the period from such due date until the same shall be paid. The Facility Lessee also agrees to pay as Supplemental Lease Rent an amount equal to any amount of Make Whole Premium and Change of Control Premium required to be paid pursuant to the Lease Indenture or any Note. All Supplemental Lease Rent to be paid pursuant to this Section 3.4 shall be payable in the manner set forth in Section 3.6. Section 3.5 Adjustment of Lease Schedules. (a) Periodic Lease Rent, Allocated Rent, Lessor Section 467 Loan Balance, Lessee Section 467 Loan Balance, Lessor Section 467 Interest, Lessee Section 467 Interest and Termination Value (collectively, the "Adjustment Items") shall be adjusted, either upward or downward, to reflect: (i) the effect of any refunding or refinancing of the Lease Debt and Notes (including without limitation, the principal amount, amortization and interest rates) issued pursuant to Section 2.12 of the Lease Indenture in connection with a refinancing of the Notes pursuant to Section 12.2 of the Participation Agreement; (ii) the financing of Modifications to the Facility pursuant to Section 12.1 of the Participation Agreement (including without limitation the issuance of Additional Lessor Notes pursuant to Section 2.12 of the Lease Indenture in connection therewith) or (iii) the correction of any manifest error in the mathematical computation of the Adjustment Items. (b) In the event the Registration Statement is not effective or the Exchange Offer has not been consummated within 270 days of the Initial Purchaser's request therefor (collectively, "Registration Delay"), the Owner Lessor and the Facility Lessee will institute an alternative rent schedule (the "Alternative Rent Schedule") to replace Schedules 1-A, 1-B and 1-C attached hereto and an alternative termination value schedule (the "Alternative Termination Value Schedule") to replace Schedule 2 attached hereto. The Alternative Rent Schedule will require amounts of Periodic Lease Rent during the Basic Lease Term ("Alternative Rent") to be paid that equal the sum of the Periodic Lease Rent that would have been paid absent a Registration Delay and an amount equal to the increased amounts paid pursuant to the Notes because of the Registration Delay ("Additional Amount"). The Alternative Termination Value Schedule will reflect the increase on any Termination Date of such Additional Amount. The Alternative Rent Schedule will allocate the Additional Amount over the Basic Lease Term in accordance with the rules of Section 467 of the Code then in effect and in a manner that preserves the Owner Participant's Expected Return. At the commencement of any Registration Delay, the Alternative Rent Schedule and Alternative Termination Value Schedule will be based on the assumption that the Additional Amount applies for the term of the Notes. In the event the Additional Amount terminates prior to the term of the Notes, such schedules will be revised to reflect the actual amounts of Additional Amount paid. It is the intent of the Owner Lessor and the Facility Lessee that the options set forth in this Section 3.5(b) constitute alternative rent schedules as contemplated under Treasury Regulation 1.467-l(h)(3)(v). Keystone Facility Lease 6 HOU0!:587609.2.

(c) Any adjustments pursuant to this Section 3.5 shall be calculated (i) first, to maintain the Owner Participant's Expected Return, and (ii) second, at the option of the Facility Lessee, (A) to minimize the average annual Periodic Lease Rent over the Basic Lease Term for the Facility Lessee's GAAP accounting purposes, (B) to minimize to the extent possible, the net present value, discounted at the Discount Rate, compounded on a semi-annual basis to the date of the termination, of Periodic Lease Rent and/or (C) to maintain operating lease treatment for the Facility Lessee; provided that no such adjustment shall require the Owner Participant to record a loss as of the date such adjustment is made or shall change the Owner Participant's book earnings for the year in which such adjustment is made and each of the succeeding four years by more than plus or minus 5% without the consent of the Owner Participant. (d) Anything herein or in any other Operative Document to the contrary notwithstanding, Periodic Lease Rent payable on any Rent Payment Date, whether or not adjusted in accordance with this Section 3.5, shall, in the aggregate, be in an amount at least sufficient to pay in full principal and interest payable on the Notes on such Rent Payment Date. Anything herein or in any other Operative Document to the contrary notwithstanding, Termination Values (excluding the Equity Portion of Termination Value) payable on any date under this Facility Lease, whether or not adjusted in accordance with this Section 3.5, shall in the aggregate, together with all other Rent due and owing on such date, exclusive of any portion thereof that is an Excepted Payment, be in an amount at least sufficient to pay in full the principal of, premium (other than premium, if any, payable by the Owner Lessor pursuant to Section 14), if any, and accrued interest on the Notes payable on such date. (e) Notwithstanding anything herein to the contrary, the Facility Lessee shall be permitted to defer the Equity Portion of Periodic Lease Rent and the Equity Portion of Termination Value (or the Equity Portion of a Qualifying Cash Bid) with respect to the Facility Interest by such amounts and to such dates as shall be permitted under Section 5.4 of the Tax Indemnity Agreement; provided, that if Termination Value should become due in connection with an exercise of remedies following a Lease Event of Default, any such deferred Rent shall become due and payable. (f) Termination Value shall be adjusted to the extent required under Section 8 of the Tax Indemnity Agreement. (g) Any adjustment pursuant to this Section 3.5 shall initially be computed by the Owner Participant or the Equity Investor using the same method of computation, Tax Assumptions and Pricing Assumptions originally used (other than those that have changed as the result of the event giving rise to the adjustment) in the calculation of the Adjustment Items as of the Closing Date, and shall be subject to the verification procedure described in this Section 3.5(g) and in compliance with Section 467 of the Code (as in effect at the date of such adjustment), but only to the extent the original transaction complied therewith. Once computed, the results of such computation shall promptly be delivered by the Owner Participant to the Facility Lessee. Within 30 days after the receipt of the results of any such adjustment, the Facility Lessee may request that a nationally recognized firm of accountants or lease advisors selected by the Owner Participant and reasonably satisfactory to the Facility Lessee (the "Verifier") verify, on a confidential basis, after consultation with the Owner Participant and the Facility Lessee, the accuracy of such adjustment in accordance with this Section 3.5. The Owner Keystone Facility Lease 7 HOUOl:587609.2.

Participant and the Facility Lessee hereby agree, subject to the execution by the Verifier of an appropriate confidentiality agreement, to provide the Verifier with all information and materials (other than the income tax returns or accounting records of the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary or the Owner Participant) as shall be necessary in connection therewith. Each of the Owner Participant, the Owner Lessor, the Equity Investor and the Facility Lessee shall have the right to communicate with the Verifier and submit supporting information and data. If the Verifier confirms that such adjustment is in accordance with this Section 3.5, it shall so certify to the Facility Lessee, the Owner Lessor and the Owner Participant and such certification shall be final, binding and conclusive on the Facility Lessee, the Owner Participant and the Owner Lessor. If the Verifier concludes that such adjustment is not in accordance with this Section 3.5, and the adjustments to the Adjustment Items calculated by the Verifier are different from those calculated by the Owner Participant, then it shall so certify to the Facility Lessee, the Owner Lessor and the Owner Participant and the Verifier's calculation shall be final, binding and conclusive on the Facility Lessee, the Owner Lessor and the Owner Participant. If the Facility Lessee does not request verification of any adjustment within the period specified above, the computation provided by the Owner Participant shall be final, binding and conclusive on the Facility Lessee, the Owner Lessor and the Owner Participant. The final determination of any adjustment hereunder shall be set forth in an amendment to this Facility Lease, executed and delivered by the Owner Lessor and the Facility Lessee and consented to by the Owner Participant; provided, however, that any omission to execute and deliver such amendment shall not affect the validity and effectiveness of any such adjustment. The reasonable fees, costs and expenses of the Verifier in verifying an adjustment pursuant to this Section 3.5 shall be paid by the Facility Lessee; provided, however, that, in the event that such Verifier determines that the present value of Periodic Lease Rent to be made under this Facility Lease as calculated by the Owner-Participant is greater than the present value of the correct Periodic Lease Rent as certified by the Verifier, in each case, discounted semi­ annually at the Discount Rate, by more than seven basis points, then such expenses of the Verifier shall be paid by the Owner Participant. Notwithstanding anything herein to the contrary, the sole responsibility of the Verifier shall be to verify the calculations hereunder and matters of interpretation of this Facility Lease or any other Operative Document shall not be within the scope of the Verifier's responsibilities. Section 3. 6 Manner of Payments. All Rent (whether Periodic Lease Rent, Renewal Lease Rent or Supplemental Lease Rent) shall be paid by the Facility Lessee in Dollars in immediately available funds to the recipient not later than 10:30 a.m. (New York City time) on the date due. All Rent payable to the Owner Lessor (other than Excepted Payments) shall be paid by the Facility Lessee to the Owner Lessor at its account at Wilmington Trust Company (ABA #▇▇▇-▇▇▇-▇▇▇ Account No. 52442-0 Attention: ▇▇▇▇ ▇▇▇▇▇), or to such other place as the Owner Lessor shall notify the Facility Lessee in writing; provided, however, that so long as the Lien of the Lease Indenture has not been: discharged, the Owner Lessor hereby irrevocably directs (it being agreed and understood that such direction shall be deemed to have been revoked after the Lien of the Lease Indenture shall have been fully discharged in accordance with its terms), and the Facility Lessee agrees, that all payments of Rent (other than Excepted Payments) payable to the Owner Lessor shall be paid by wire transfer directly to the Lease Indenture Trustee's Account or to such other place as the Lease Indenture Trustee shall notify the Facility Lessee in writing pursuant to the Lease Indenture. Payments constituting Excepted Payments shall be made to the Person entitled thereto at the address for such Person set forth in the Keystone Facility Lease 8 HOUOl:587609.2.

Participation Agreement, or to such other place as such Person shall notify the Facility Lessee in writing. SECTION 4 DISCLAIMER OF WARRANTIES; RIGHT OF QUIET ENJOYMENT Section 4.1 Disclaimer of Warranties. (a) Without waiving any claim the Facility Lessee may have against any manufacturer, vendor or contractor, THE FACILITY LESSEE ACKNOWLEDGES AND AGREES SOLELY FOR THE BENEFIT OF THE OWNER LESSOR AND THE OWNER PARTICIPANT THAT (i)THE FACILITY AND EACH COMPONENT THEREOF ARE OF A SIZE, DESIGN, CAPACITY AND MANUFACTURE ACCEPTABLE TO THE FACILITY LESSEE, (ii) THE FACILITY LESSEE IS SATISFIED THAT THE FACILITY AND EACH COMPONENT THEREOF ARE SUITABLE FOR THEIR RESPECTIVE PURPOSES, (iii) NEITHER THEOWNERLESSORNOR THEOWNERPARTICIPANT IS A MANUFACTURER OR A DEALER IN PROPERTY OF SUCH KIND, (iv) THE FACILITY INTEREST IS LEASED HEREUNDER TO THE EXTENT PROVIDED HEREBY FOR THE BASIC LEASE TERM AND THE RENEWAL LEASE TERMS, IF ANY, SPECIFIED HEREIN SUBJECT TO ALL APPLICABLE LAW NOW IN EFFECT OR HEREAFTER ADOPTED, INCLUDING (1) ZONING REGULATIONS, (2) ENVIRONMENTAL LAWS OR (3) BUILDING RESTRICTIONS, AND IN THE STATE AND CONDITION OF EVERY PART THEREOF WHEN THE SAME FIRST BECAME SUBJECT TO THIS FACILITY LEASE WITHOUT REPRESENTATION OR WARRANTY OF ANY KIND BY THE OWNER LESSOR OR THE OWNER PARTICIPANT AND (v) THE OWNER LESSOR LEASES FOR THE BASIC LEASE TERM AND THE RENEWAL LEASE TERMS, IF ANY, SPECIFIED HEREIN AND THE FACILITY LESSEE TAKES THE FACILITY INTEREST UNDER THIS FACILITY LEASE "AS-IS", "WHERE-IS" AND "WITH ALL FAULTS", AND THE FACILITY LESSEE ACKNOWLEDGES THAT NEITHER THE OWNER LESSOR NOR THE OWNER PARTICIPANT MAKES NOR SHALL BE DEEMED TO HAVE MADE, AND EACHEXPRESSLY DISCLAIMS,ANY AND ALL RIGHTS, CLAIMS, WARRANTIES OR REPRESENTATIONS, EITHER EXPRESS OR IMPLIED, AS TO THE VALUE,CONDITION, FITNESS FOR ANY PARTICULAR PURPOSE, DESIGN, OPERATION, OR MERCHANTABILITY THEREOF OR AS TO THE TITLE OF THE FACILITY, THE QUALITY OF THE MATERIAL OR WORKMANSHIP THEREOF OR CONFORMITYTHEREOF TO SPECIFICATIONS, FREEDOM FROM PATENT, COPYRIGHT OR TRADEMARK INFRINGEMENT, THE ABSENCE OF ANY LATENT OR OTHER DEFECT, WHETHER OR NOT DISCOVERABLE, OR AS TO THE ABSENCE OF ANY OBLIGATIONS BASED ON STRICT LIABILITY IN TORT OR ANY OTHER EXPRESS OR IMPLIED REPRESENTATION OR WARRANTY WHATSOEVER WITH RESPECT THERETO, except that the Owner Lessor represents and warrants that on the Closing Date, the Facility Interest will be free of Owner Lessor's Liens. It is agreed that all such risks, as between the Owner Lessor and the Owner Participant on the one hand and the Facility Lessee on the other hand are to be borne by the Facility Lessee with respect to acts, occurrences or omissions during the Facility Lease Term. Neither the Owner Lessor nor the Owner Participant shall have any responsibility or liability to the Facility Lessee or any other Person with respect to Keystone Facility Lease 9 HOU01:587609.2.

any of the following: (x) any liability, loss or damage caused or alleged to be caused directly or indirectly by the Facility or any Component or by any inadequacy thereof or deficiency or defect therein or by any otber circumstances in connection therewith; (y) the use, operation or performance of the Facility or any Component thereof or any risks relating thereto; or (z) the delivery, operation, serv1cmg, maintenance, repair, improvement, replacement or decommissioning of the Facility or any Component thereof. The provisions of this paragraph (a) of this Section 4.1 have been negotiated, and, except to the extent otherwise expressly stated, the foregoing provisions are intended to be a complete exclusion and negation of any representations or warranties of the Owner Lessor, express or implied, with respect to the Facility or any Components thereof or the Facility Interest that may arise pursuant to any Applicable Law now or hereafter in effect, or otherwise. (b) During the Facility Lease Term, so long as no Lease Event of Default shall have occurred and be continuing, the Owner Lessor hereby appoints irrevocably and constitutes the Facility Lessee its agent and attorney-in-fact, coupled with an interest, to assert and enforce, from time to time, in the name and for tbe account of the Owner Lessor and the Facility Lessee, as tbeir interests may appear, but in all cases at the sole cost and expense of tbe Facility Lessee, whatever claims and rights the Owner Lessor may have in respect of the Facility or any Component thereof, or the Facility Interest against any manufacturer, vendor or contractor, or under any express or implied warranties relating to the Facility or any Component thereof, or tbe Facility Interest. Section 4.2 Quiet Enjoyment. So long as no Lease Event of Default has occurred and is continuing, tbe Facility Lessee's quiet enjoyment of the Facility Interest will not be disturbed by the Owner Lessor or any party acting by, through or under tbe Owner Lessor. Without limiting any right or remedies under the Owners Agreement, the right of the Other Facility Owners of the Facility to quiet enjoyment, if any, will not be disturbed by the Owner Lessor or any party acting by, through or under the Owner Lessor. SECTION 5 RETURN OF FACILITY INTEREST Section 5.1 Return. Upon expiration or termination of this Facility Lease (other than a termination pursuant to Section I 0 or, if the Facility Interest is being transferred to the Facility Lessee, Sections 13 or 14), the Facility Lessee, at its own expense, shall return the Facility Interest (together with an undivided interest equal to the Owner Lessor's Percentage in all Modifications to the Facility which shall have vested in the Owner Lessor pursuant to the first sentence of Section 8.3) to the Owner Lessor or any permitted transferee or assignee of the Owner Lessor by surrendering the Facility Interest into the possession of the Owner Lessor or such transferee or assignee at tbe location of the Facility on the Facility Site. In connection with such return, the Facility Lessee shall (a) assign, to the extent permitted by Applicable Law and not already assigned to the Owner Lessor, a corresponding undivided interest equal to tbe Owner Lessor's Percentage in, and shall cooperate with all reasonable requests of the Owner Participant, the Owner Lessor or a permitted transferee or assignee of eitber of such parties for purposes of obtaining, or enabling tbe Owner Participant, the Owner Lessor or such transferees or assignees to obtain, any and all material Governmental Approvals and licenses, permits, approvals and Keystone Facility Lease 10 HOUOl:587609.2.

consents of any Governmental Entities or other Persons that are or will be required to be obtained by the Owner Participant, the Owner Lessor or such transferee or assignee in connection with the use, operation or maintenance of the Facility Interest on or after such return in compliance with the Owners Agreement, agreements and contracts permitted by Section 5.21 of the Participation Agreement and Applicable Law including, without limitation, any fuel supply, interconnection, power purchase or other agreements with respect to the Facility Interest; and (b) provide the Owner Lessor or a permitted transferee or assignee of the Owner Lessor copies of all documents, instruments, plans, maps, specifications, manuals, drawings and other documentary materials relating to the installation, maintenance, operation, construction, design, modification and repair of the Facility, as shall be in the Facility Lessee's possession and shall be reasonably appropriate or necessary for the continued operation of the Facility. Upon such return, the right to use the Facility Interest granted hereunder for the benefit of the Facility Lessee shall cease and terminate. Section 5.2 Condition Upon Return. At the time of a return of the Facility Interest by the Facility Lessee pursuant to Section 5.1 (other than a return pursuant to Section 13 or 14), the following conditions shall be complied with, all at the Facility Lessee's sole cost and expense: (a) the Facility will be in at least as good condition as if it had been maintained, repaired and operated during the Facility Lease Term in compliance with the provisions of this Facility Lease (including, without limitation, the provisions of Section 7), ordinary wear and tear excepted, and there shall be no deferred maintenance in respect of the Facility; (b) the Facility Interest shall be free and clear of all Liens other than Permitted Liens set forth in clauses (ii), (iii), (iv), (vi), (viii) and (ix) of the definition thereof; provided, however, that nothing in this Section 5.2(b) shall limit the obligations of the Facility Lessee under Section I 0.1 of the Participation Agreement; (c) the Facility shall have at least the capability and functional ability, as certified by an independent professional engineer selected pursuant to the Independent Engineer Selection Procedure, to generate electricity, on a continuous basis in normal commercial operating conditions, substantially at the ratings for which it was designed after taking into account all Modifications to the Facility made in accordance with this Facility Lease (ordinary wear and tear excepted); (d) the Facility shall be in material compliance with all requirements of manufacturers required for the maintenance in full force and effect of any material warranty then in effect with respect to the Facility; (e) no Component of the Facility shall be a temporary Component and any replacement Component of the Facility shall satisfy the standards of Section 7.2; and (f) the Facility Lessee, at the request of the Owner Lessor, shall sell pursuant to Section 8.3 (subject to all existing encumbrances) to the Owner Lessor (or its designee or transferee) all Optional Modifications which are Severable Modifications or an undivided interest in such Optional Modifications which are Severable Modifications made to the Facility Keystone Facility Lease ll HOUOL587609.2.

which are owned by the Facility Lessee (other than Severable Modifications referred to in the first sentence of Section 8.3). In addition to the foregoing conditions, the Facility Lessee, or an Affiliate thereof, shall enter into an agreement or other arrangements reasonably acceptable to the Owner Lessor, which arrangements, however, shall not be a condition precedent to the return of the Facility Interest (the "Support Arrangements") to provide the Owner Lessor with the Support Services; provided, that the Facility Lessee shall be bound to provide Support Services only to the extent the Facility Lessee or any domestic, unregulated Affiliate thereof is capable of providing such services and is either in the business of providing such Support Services to others or performing such Support Services on its own behalf, and only to the extent that such services cannot reasonably and timely be obtained by the Owner Lessor or its Affiliates from third parties. Support Arrangements shall provide for the provision of Support Services during and after the expiration of this Facility Lease, and will provide for fair market value compensation from time to time to be paid to the Facility Lessee, or an Affiliate thereof, for the performance of such Support Services, periodically in advance on no less than on an annual basis, for such rights and the performance of other services and all such arrangements shall terminate upon expiration or early termination of the Site Lease Term or at the Owner Lessor's option. Within 180 days after the expiration or termination of this Facility Lease, the Owner Lessor shall notify the Facility Lessee of the material elements of the Support Services that the Owner Lessor desires the Facility Lessee, or its Affiliate, to continue to perform. Following such notice, the Facility Lessee and the Owner Lessor shall negotiate in good faith the terms of the fair market value, performance standards, compensation and other terms of such specified Support Services, including the circumstances under which the Facility Lessee and its Affiliates shall be released of any further obligation to provide such Support Services, and enter into contracts for the performance of the Support Services upon any such negotiated terms. Other than the Support Services covered by such contracts, the Facility Lessee will have no further obligation to provide Support Services. Section 5. 3 Environmental ▇▇▇▇▇▇▇.▇▇ connection with the return of the Facility Interest pursuant to Section 5.2, the Facility Lessee shall, at its own expense, provide the Owner Lessor and the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee (a) not later than 180 days prior to the later of the Expiration Date or the last day of the last Renewal Lease Term elected by the Facility Lessee, or (b) in connection with any return pursuant to Section 17, as promptly as possible after a request therefor by the Owner Lessor, the Owner Participant or, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee, a phase I environmental survey, which shall be expanded to a phase II environmental survey if, as a result of the phase I survey, facts are revealed that would reasonably necessitate a phase II survey, prepared by a reputable environmental consulting firm (selected by the Facility Lessee and reasonably acceptable to the Owner Participant) as to the environmental condition of the Facility and the Facility Site and the compliance or non-compliance with applicable Environmental Laws and the presence or absence of Environmental Conditions, in form and scope reasonably satisfactory to the Owner Participant. The provisions of such surveys shall not relieve the Facility Lessee of liability with respect to Environmental Conditions, known or unknown, in respect of the Facility Interest or the Facility Site and the Facility Lessee will take any and all actions necessary to ensure that the Facility Interest and the Facility Site comply with Keystone Facility Lease 12 HOUOl:587609.2.

all such Environmental Laws. If such survey shall indicate that the Facility Interest or the Facility Site is not then in compliance with then applicable Environmental Laws, the Facility Lessee shall, within 90 days of the Owner Lessor having received such survey, provide the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee, with a remediation or compliance plan designed to ensure that the Facility Interest and the Facility Site will be brought into compliance with applicable Environmental Laws and all material Environmental Conditions recommended for correction in such survey will be corrected as promptly as is reasonably practical and without materially adversely affecting the continued operation of such Facility. The Facility Lessee shall at its expense perform such cleanup or remediation and achieve compliance as soon as reasonably practicable. The obligations of the Facility Lessee set forth in this Section 5.3 shall survive the termination of this Facility Lease and the expiration of the Facility Lease Term. SECTION 6 LIENS The Facility Lessee covenants that it will not directly or indirectly create, incur, assume or suffer to exist any Lien on or with respect to the Facility Interest, the Facility Site or any Component, or any interest therein or in, to or on its interest in this Facility Lease or its interest in any other Operative Document, except Permitted Liens, and the Facility Lessee shall promptly notify the Owner Lessor of the imposition of any such Lien of which the Facility Lessee is aware and shall promptly, at its own expense, take such action as may be necessary to fully discharge or release any Lien. The Facility Lessee shall defend the Owner Lessor from and against all claims to the Owner Lessor's title to the Facility Interest or any portion thereof (except for Owner Lessor's Liens, Owner Participant's Liens and Permitted Encumbrances). SECTION 7 MAINTENANCE; REPLACEMENTS OF COMPONENTS Section 7.1 Maintenance.The Facility Lessee, at its own cost and expense, will exercise all rights, powers, elections and options available to it or any of its Affiliates under the Owners Agreement to (a) cause the Facility to be maintained in good condition, repair and working order, ordinary wear and tear excepted, and in any event, in all material respects (i) in accordance with Prudent Industry Practice, (ii) in compliance with all Applicable Law, including without limitation all Environmental Laws and safety laws, unless such noncompliance could not reasonably be expected to result in a Material Adverse Effect or involve any (I) danger of foreclosure, sale, forfeiture or loss of, or imposition of a lien on, the Facility, the Facility Interest or the Facility Site or the impairment of the use, operation or maintenance of the Facility or the Facility Site in any material respect, or (2) risk of criminal liability being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture Trustee or the Pass Through Trustee or any of their Affiliates or (3) material risk of the occurrence of any material adverse effect being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture Trustee or the Pass Through Trustee, and (iii) in accordance with the terms of all insurance Keystone Facility Lease 13 HOUOL587609.2.

policies required to be maintained pursuant to Section 11, and (b) cause to be made all necessary repairs, renewals, replacements, betterments and improvements thereof, all as in the reasonable judgment of the Facility Lessee may be necessary so that the Facility Interest may be operated in accordance with the Operative Documents, provided, however, that such obligation hereunder shall be limited to the exercise of all rights, powers, elections and options available to the Facility Lessee or any of its Affiliates under the Owners Agreement. Section 7.2 Replacement of ▇▇▇▇▇▇▇▇▇▇.▇▇ the ordinary course of maintenance, service, repair or testing of the Facility or any Component, the Facility Lessee or the Operator, at its own cost and expense, may remove or cause or permit to be removed from the Facility any Component; provided, however, that the Facility Lessee shall exercise all rights, powers, elections and options available to it or any of its Affiliates under the Owners Agreement to (a) cause such Component to be replaced by a replacement Component which shall be free and clear of all Liens (except Permitted Liens) and in as good operating condition as the Component replaced, assuming that the Component replaced was maintained in accordance with this Facility Lease, and assuming the Facility shall then be in the condition required to have been maintained by the terms of this Facility Lease (each such replacement Component being herein referred to as a "Replacement Component") and (b) cause such replacement to be performed in a manner which does not diminish the current or residual value, remaining useful life or utility of the Facility by more than a de minimis amount below the then current or residual value, the remaining useful life or the utility thereof immediately prior to such replacement or cause the Facility to become "limited-use" property within the meaning of Rev. Proc. 75-28, 1975-1 C.B. 752 or Rev. Proc. 76-30, 1976-2 C.B. 647; provided, further, that the Facility Lessee's obligations hereunder shall be limited to its exercise of all rights, powers, elections and options available to it or any of its Affiliates under the Owners Agreement. An undivided interest equal to the Owner Lessor's Percentage in each Component of the Facility which is subject to this Facility Lease, at any time removed from the Facility, shall remain subject to this Facility Lease, wherever located, until such time as such Component shall be replaced by a Replacement Component which has been incorporated in the Facility and which meets the requirements for Replacement Components specified above. Immediately upon any Replacement Component becoming incorporated in the Facility, without further act (and at no cost to the Owner Lessor and with no adjustment to the Purchase Price or Periodic Lease Rent or Allocated Rent), (i) the replaced Component shall no longer be subject to this Facility Lease, (ii) title to the Owner Lessor's undivided interest equal to the Owner Lessor's Percentage in the removed Component (to the extent part of the Facility Interest) shall thereupon vest in the Facility Lessee or such other Person as shall be designated by the Facility Lessee, free and clear of all rights of the Owner Lessor and the Lease Indenture Trustee, and (iii) title to an undivided interest equal to the Owner Lessor's Percentage in the Replacement Component shall thereupon vest with the Owner Lessor and such undivided interest shall (x) become subject to this Facility Lease and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lien of the Lease Indenture, and (y) be deemed a part of the Facility and the Facility Interest for all purposes of this Facility Lease. Notwithstanding anything in this Section 7.2 or elsewhere in this Facility Lease to the contrary, but subject to the Owners Agreement, if the Facility Lessee has determined that a Component is surplus or obsolete, it shall have the right to remove such Component without replacing it; provided, that no such Component may be so removed without being replaced if such removal would diminish the current or residual value, remaining useful life or utility of the Facility or the Facility Interest by more than a de minimis amount below the Keystone Facility Lease 14 HOUO I :587609.2.

current or residual value, the remaining useful life or the utility thereof immediately prior to such removal, assuming the Facility Interest shall then be in the condition required to have been maintained by the terms of this Facility Lease or cause the Facility to become "limited use" property within the meaning of Rev. Proc. 75-28, 1975-1 C.B. 752 or Rev. Proc. 76-30, 1976-2 C.B. 647. Section 7. 3 Environmental Matters. The Facility Lessee will, at its own expense, exercise all rights, powers, elections and options available to it or any of its Affiliates under the Owners Agreement to: (a) comply with all Environmental Laws applicable to the Facility or the Facility Site, except for those the failure to comply with could not reasonably be expected to have a Material Adverse Effect or involve any (I) danger of foreclosure, sale, forfeiture or loss of, or imposition of a lien on, the Facility, the Facility Interest or the Facility Site or the impairment of the use, operation or maintenance of the Facility or the Facility Site in any material respect, (2) risk of criminal liability being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture Trustee or the Pass Through Trustee or any of their Affiliates or (3) material risk of the occurrence of any material adverse effect being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture Trustee or the Pass Through Trustee, and as between the Owner Lessor and the Facility Lessee, the Facility Lessee shall have the sole responsibility for any and all costs and expenses associated with such compliance; (b) obtain, comply and maintain all necessary Governmental Approvals required under any applicable Environmental Law, in connection with the use, operation and maintenance of the Facility and the Facility Site except for those the failure to comply with could not reasonably be expected to have a Material Adverse Effect or involve any (I) danger of foreclosure, sale, forfeiture or loss of, or imposition of a lien on, the Facility, the Facility Interest or the Facility Site or the impairment of the use, operation or maintenance of the Facility or the Facility Site in any material respect, or (2) risk of criminal liability being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture Trustee or the Pass Through Trustee or any of their Affiliates or (3) material risk of the occurrence of any material adverse effect being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture Trustee or the Pass Through Trustee; (c) conduct and complete, at no cost and expense to the Owner Participant or the Owner Lessor, any investigation, study, sampling, monitoring and testing and undertake any cleanup, removal, remedial, corrective, mitigation, response or other action necessary or advisable to ▇▇▇▇▇, correct, remove and clean up the Facility or the Facility Site, to the extent required by and in compliance with applicable Environmental Laws, except for those the failure to comply with could not reasonably be expected to have a Material Adverse Effect or involve any (I) danger of foreclosure, sale, forfeiture or loss of, or imposition of a lien on, the Facility, the Facility Interest or the Facility Site or the impairment of the use, operation or maintenance of Keystone Facility Lease 15 HOUOl:587609.2.

the Facility or the. Facility Site in any material respect, or (2) risk of criminal liability being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture Trustee or the Pass Through Trustee or any of their Affiliates or (3) material risk of the occurrence of any material adverse effect being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture Trustee or the Pass Through Trustee; and (d) as soon as possible and in any event within fifteen Business Days of the Facility Lessee obtaining Actual Knowledge thereof, provide the Owner Lessor with written notice of, and copies of all written communications relating to, any pending or threatened material claim arising from a violation of or liability under any Environmental Law involving the Facility or the Facility Site that could be expected to have a Material Adverse Effect or involve any (I) danger of foreclosure, sale, forfeiture or loss of, or imposition of a lien on, the Facility, the Facility Interest or the Facility Site or the impairment of the use, operation or maintenance of the Facility or the Facility Site in any material respect, (2) risk of criminal liability being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture Trustee or the Pass Through Trustee or any of their Affiliates or (3) material risk of the occurrence of any material adverse effect being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture Trustee or the Pass Through Trustee. To the extent possible, all such notices shall describe in reasonable detail the nature of the claim, and the Facility Lessee's plans for responding to such claim. SECTION 8 MODIFICATIONS Section 8.1 Required Modifications. The Facility Lessee, at its own cost and expense, shall exercise all rights, powers, elections and options available to it or any of its Affiliates under the Owners Agreement to make or cause or permit to be made all Modifications to the Facility as they relate to the Facility Interest as are required by Applicable Law (each, a "Required Modification"); provided, however, that the Facility Lessee may, in good faith and by appropriate proceedings, diligently contest the validity or application of any Applicable Laws in any reasonable manner which does not involve any (i) danger of foreclosure, sale, forfeiture or loss of any part of the Facility Interest or the impairment of the use, operation or maintenance of the Facility in any material respect, (ii) any risk of criminal liability asserted against the Owner Lessor, the Owner Participant, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Equity Investor or any of their respective Affiliates, or (iii) material risk of the occurrence of any material adverse effect being incurred by the Owner Participant, the Owner Lessor, the Equity Subsidiary, the Equity Subsidiary Holding Company, the Equity Investor, the Lease Indenture Trustee or the Pass Through Trustee including, without limitation, subjecting any such Person to regulation as a public utility under Applicable Law; provided further, that no such contest may extend beyond the expiration or earlier termination of this Facility Lease. Keystone Facility Lease !6 HOUOL587609.2.

Section 8. 2 Optional Modifications. The Facility Lessee at any time may, at its own cost and expense, subject to the Owners Agreement, make or cause or permit to be made any Modification to the Facility as the Facility Lessee considers desirable in the proper conduct of its business (any such non-Required Modification being referred to as an "Optional Modification"); provided that the Facility Lessee shall exercise all rights, powers, elections and options available to it or any of its Affiliates under the Owners Agreement to prevent any Optional Modification from being made to the Facility that would diminish by more than a de minimis amount the current or residual value, remaining useful life or utility of the Facility below the current or residual value, remaining useful life or utility of the Facility immediately prior to such Optional Modification assuming the Facility was then in the condition required to be maintained by the terms of this Facility Lease, or cause the Facility to become "limited use" property, within the meaning of Rev. Proc. 75-28, 1975-1 C.B. 752 or Rev. Proc. 76-30, 1976-2 C.B. 647. Section 8.3 Title to Modifications. Title to an undivided interest equal to the Owner Lessor's Percentage in (a) all Required Modifications, (b) all Nonseverable Modifications and (c) all Modifications financed by the Owner Lessor by an Additional Equity Investment or a Supplemental Financing pursuant to Section 12.1 of the Participation Agreement shall (at no cost to the Owner Lessor and with no adjustment to the Purchase Price or, except as provided herein, Periodic Lease Rent, Renewal Lease Rent or Allocated Rent) immediately vest in the Owner Lessor, and such undivided interest shall immediately (i) become subject to this Facility Lease and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lien of the Lease Indenture, and (ii) be deemed part of the Facility Interest for all purposes of this Facility Lease. The Facility Lessee, at its own cost and expense, shall take such steps as the Owner Lessor and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee may reasonably require from time to time to confirm that title in such undivided interest has vested in the Owner Lessor and that such undivided interest is subject to this Facility Lease and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lien of the Lease Indenture. No interest in any Optional Modification which is a Severable Modification (other than Severable Modifications which are financed by the Owner Lessor by an Additional Equity Investment or a Supplemental Financing pursuant to Section 12.1 of the Participation Agreement) shall vest in the Owner Lessor or become subject to this Facility Lease or the Lien of the Lease Indenture; provided, however, that if the Facility Lessee shall, at its cost and expense, cause such Optional Modifications which are Severable Modifications to be made to the Facility, the Owner Lessor shall have the right, immediately prior to the return of the Facility Interest to the Owner Lessor hereunder, to purchase an undivided interest equal to the Owner Lessor's Percentage in any such Optional Modifications which are Severable Modifications. The purchase price for such undivided interest shall be the then Fair Market Sales Value of such undivided interest. If the Owner Lessor does not elect to purchase such Optional Modifications which are Severable Modifications, the Facility Lessee may, to the extent permitted by the Owners Agreement, remove such Modifications at the end of the Facility Lease Term and the Facility Lessee shall repair any damage to the Facility and the Facility Site caused by such removal, all at the Facility Lessee's cost and expense; provided, however, that such removal shall not (i) diminish the value, remaining useful life or utility of the Facility by more than a de minimis amount assuming the Facility would have been at the time of removal in the condition required to be maintained by the terms of this Facility Lease, or (ii) cause the Facility to become "limited use" property, within the meaning of Rev. Proc. 75-28, 1975-1 C.B. 752 or Rev. Proc. 76-30, 1976-2 C.B. 647. If the Keystone Facility Lease 17 HOUOI:587609.2.

Facility Lessee shall have failed to remove any Optional Modifications which are Severable Modifications as above provided prior to the return of the Facility Interest to the Owner Lessor hereunder, title to an undivided interest equal to the Owner Lessor's Percentage in such Modifications shall (at no cost to the Owner Lessor) vest in the Owner Lessor. SECTION 9 NET LEASE This Facility Lease is a "net lease" and the Facility Lessee's obligation to make all Rent payments payable hereunder or other payments under the Operative Documents (and all amounts, including Termination Value, following termination of this Facility Lease) shall be absolute and unconditional under any and all circumstances, and shall not be terminated, extinguished, diminished, lost or otherwise impaired by any circumstance of any character, including by (i) any setoff, counterclaim, recoupment, defense or other right which the Facility Lessee may have against the Owner Lessor, the Owner Participant, the Equity Subsidiary, the Equity Investor, the Pass Through Trustee, the Lease Indenture Trustee or any other Person, including any claim as a result of any breach by any of said parties of any covenant or provision in this Facility Lease or any other Operative Document, (ii) any lack or invalidity of title or any defect in the title, condition, design, operation, merchantability or fitness for use of the Facility or any Component thereof, or any eviction by paramount title or otherwise, or any unavailability of the Facility, the Facility Site, any Component thereof, any other portion of the Facility Interest, or any part thereof, (iii) any loss or destruction of, or damage to, the Facility or any Component thereof or interruption or cessation in the use or possession thereof or any part thereof by the Facility Lessee for any reason whatsoever and of whatever duration, (iv) the condemnation, requisitioning, expropriation, seizure or other taking of title to or use of the Facility Site, the Facility, any Component thereof, or any other portion of the Facility Interest by any Governmental Entity or otherwise, (v) the invalidity or unenforceability or lack of due authorization or other infirmity of this Facility Lease or any other Operative Document, (vi) the lack of right, power or authority of the Owner Lessor to enter into this Facility Lease or any other Operative Document, (vii) any ineligibility of the Facility or any Component thereof for any particular use, whether or not due to any failure of the Facility Lessee to comply with any Applicable Law, (viii) any event of"force majeure" or any frustration, (ix) any legal requirement similar or dissimilar to the foregoing, any present or future law to the contrary notwithstanding, (x) any insolvency, bankruptcy, reorganization or similar proceeding by or against the Facility Lessee or any other Person, (xi) any Lien of any Person with respect to the Facility Site, the Facility, any Component thereof, any other portion of the Facility Interest or any part thereof, or (xii) any other cause, whether similar or dissimilar to the foregoing, any present or future law notwithstanding, except as expressly set forth herein or in any other Operative Document, it being the intention of the parties hereto that all Rent (and all amounts, including Termination Value, following termination of this Facility Lease) payable by the Facility Lessee hereunder shall continue to be payable in all events in the manner and at times provided for herein. Such Rent (and all amounts, including Termination Value, following termination of this Facility Lease) shall not be subject to any abatement and the payments thereof shall not be subject to any setoff or reduction for any reason whatsoever, including any present or future claims of the Facility Lessee or any other Person against the Owner Lessor or any other Person under this Facility Lease or otherwise. To the extent permitted by Applicable Law, the Facility Lessee Keystone Facility Lease 18 HOU01:587609.2.

hereby waives any and all rights which it may now have or which at any time hereafter may be conferred upon it, by statute or otherwise, to terminate, cancel, quit or surrender this Facility Lease with respect to the Facility Interest except in accordance with Sections 10, 13, 14 or 15. If for any reason whatsoever this Facility Lease shall be terminated in whole or in part by operation of law or otherwise, except as specifically provided herein, the Facility Lessee nonetheless agrees, to the extent permitted by Applicable Law, to pay to the Owner Lessor an amount equal to each installment of Periodic Lease Rent, Renewal Lease Rent and all Supplemental Lease Rent due and owing, at the time such payment would have become due and payable in accordance with the terms hereof had this Facility Lease not been so terminated. Nothing contained herein shall be construed to waive any claim which the Facility Lessee might have under any of the Operative Documents or otherwise or to limit the right of the Facility Lessee to make any claim it might have against the Owner Lessor or any other Person or to pursue such claim in such manner as the Facility Lessee shall deem appropriate. SECTION 10 EVENTS OF LOSS Section 10.1 Occurrence of Events of Loss.The Owner Participant or the Owner Lessor will promptly notify the Facility Lessee of any event of which it is aware that, upon election of the Owner Participant, would result in a Regulatory Event of Loss; provided, however, that the failure to provide such notice shall not result in any liability with respect to the Owner Participant or the Owner Lessor and shall not in any way relieve the Facility Lessee of any of its obligations under this Facility Lease, including the obligations under this Section 10. If an Event of Loss described in clauses (a) or (b) of fhe definition of Event of Loss shall occur, then no later than nine months following such occurrence the Facility Lessee shall notify the Owner Lessor, the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee and the Pass Through Trustee in writing of its election to either (a) rebuild or replace the Facility in accordance with the Operative Documents and the Owners Agreement so that the Facility shall have a current and residual value, remaining useful life and utility at least equal to that of the Facility prior to such Event of Loss, assuming the Facility was in the condition and repair required to be maintained by this Facility Lease or (b) terminate this Facility Lease with respect to the Facility Interest and purchase the Facility Interest from the Owner Lessor by paying to the Owner Lessor an amount equal to the applicable Termination Value and paying to the parties entitled thereto all other amounts payable pursuant to Section I 0.2. The Facility Lessee may elect the option provided in clause (b) of the preceding sentence regardless of whether the Facility is to be rebuilt or replaced. If the Facility Lessee fails to make an election as provided above, an Event of Loss shall be deemed to occur as of the end of the nine month period referred to in the second sentence of this Section 10.1 and the Facility Lessee will be deemed to have made the election to terminate this Facility Lease with respect to the Facility Interest and purchase the Facility Interest from the Owner Lessor by paying to the Owner Lessor an amount equal to the applicable Termination Value and paying to the parties entitled thereto all other amounts payable pursuant to Section 10.2. HOU0!:587609.2. Ke)'stone Facility Lease 19

Section I 0. 2 Payment of Termination Value; Termination of Periodic Lease Rent. (a) If any of (x) an Event of Loss described in clause (a) or (b) of the definition of Event of Loss shall have occurred and the Facility Lessee shall elect not to rebuild or replace the Facility pursuant to Section IO.l(a), (y) an Event of Loss shall be deemed to occur pursuant to the last sentence of Section I 0.1, or (z) an Event of Loss described in clause (c) or (d) of the definition of Event of Loss shall occur, then, in the case of clause (x), on the next Termination Date after the Facility Lessee's notice of its election referred to in the second sentence of Section I 0.1, in the case of clause (y), on the next Termination Date, after the occurrence of a deemed Event of Loss pursuant to the last sentence of Section I 0.1 or, in the case of clause (z), on the next Termination Date occurring at least three months after the occurrence of such Event of Loss or, if earlier, at least one month after receipt of insurance proceeds in respect of such Event of Loss the Facility Lessee shall pay to the Owner Lessor (A) the Termination Value determined as of the relevant Termination Date, plus (B) all amounts of Supplemental Lease Rent (including all documented out-of-pocket costs and expenses of the Owner Lessor, the Owner Participant, the Lease Indenture Trustee, the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary and the Pass Through Trustee, and all sales, use, value added and other Taxes required to be indemnified by the Facility Lessee pursuant to Section I 0.2 of the Participation Agreement associated with the exercise of the termination option pursuant to this Section 10.2) due and payable or unpaid or accrued on or prior to such Termination Date, plus (C) any unpaid Periodic Lease Rent due before (but not on) such Termination Date. On the date the Facility Lessee is required to pay Termination Value pursuant to this Section I 0.2, the balance of the Lessor Section 467 Loan Balance or the Lessee Section 467 Loan Balance (as the case may be) shall be reduced to zero and shall be fully discharged for all purposes. · (b) Concurrently with the payment of all sums required to be paid pursuant to this Section I 0.2, (i) Periodic Lease Rent or Renewal Lease Rent, as applicable, shall cease to accrue, (ii) the Facility Lessee's obligations under Sections ▇, ▇, ▇, ▇▇ ▇▇▇ ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, (▇▇▇) the Facility Lessee shall cease to have any other liability to the Owner Lessor, the Owner Participant and its Affiliates with respect to the Facility Interest except for Supplemental Lease Rent and other obligations (including those under Sections I 0.1 and 10.2 of the Participation Agreement and under the Tax Indemnity Agreement) surviving pursuant to the express provisions of any Operative Document, (iv) the Owner Lessor shall pay the outstanding principal and accrued interest on the Notes (excluding any Make Whole Premium, if any, due and payable) pursuant to Section 2.10(a) of the Lease Indenture, (v) this Facility Lease shall terminate, (vi) the Owner Lessor shall transfer (by an appropriate instrument of transfer in form and substance reasonably satisfactory to the Owner Lessor and prepared and recorded by and at the expense of the Facility Lessee) all of its right, title and interest in and to the Owner Lessor's Interest to the Facility Lessee, on an "as is", "where is" and "with all faults" basis, without representations or warranties other than a warranty as to the absence of Owner Lessor's Liens and a warranty of the Owner Participant as to the absence of Owner Participant's Liens; and (vii) the Owner Lessor shall execute and deliver appropriate releases and other documents or instruments necessary or desirable to effect the foregoing, all to be prepared, filed and recorded (as appropriate) at the cost and expense of the Facility Lessee. Keystone Facility Lease 20 HOUOl:587609.2.

(c). Notwithstanding the foregoing provisions of paragraphs (a) and (b) of this Section 1 0.2, in the case of a Regulatory Event of Loss, if (i) the Facility Lessee shall have executed and delivered an assumption agreement to assume the Notes as permitted by and in accordance with Section 2.1O(b) of the Lease Indenture, (ii) all other conditions contained in Section 2.1O(b) of the Lease Indenture shall have been satisfied, and (iii) no Significant Lease Default or Lease Event of Default shall have occurred and be continuing after giving effect to such assumption, then, the obligation of the Facility Lessee to pay Termination Value with respect to the Facility Interest shall be reduced by the outstanding principal amount and accrued interest of the Notes so assumed by the Facility Lessee, and the Owner Lessor shall have no obligation to prepay the outstanding principal and accrued interest on the Notes. On the date the Facility Lessee is required to pay such amount pursuant to this Section 10.2(c), the balance of the Lessor Section 467 Loan Balance or the Lessee Section 467 Loan Balance (as the case may be) shall be reduced to zero and shall be fully discharged for all purposes. (d) Any payments received at any time by the Owner Lessor, the Lease Indenture Trustee or the Facility Lessee from any Governmental Entity as a result of the occurrence of an Event of Loss described in clause (c) of the definition of Event of Loss or from insurance proceeds as a result of the occurrence of an Event of Loss described in clause (a) or (b) of the definition of Event of Loss shall be applied as follows: (i) all such payments received at any time by the Facility Lessee shall be promptly paid to the Owner Lessor or if the Lien of the Lease Indenture shall not have been terminated or discharged, to the Lease Indenture Trustee, for application pursuant to the following provisions of this Section 10.2, except that so long as no Significant Lease Default or Lease Event of Default shall have occurred and be continuing (other than Lease Events of Default arising as a result of such Event of Loss), the Facility Lessee may retain any amounts that the Owner Lessor would at the time be obligated to pay to the Facility Lessee as reimbursement under the provisions of paragraph (ii) below; (ii) so much of such payments as shall not exceed the amount required to be paid by the Facility Lessee pursuant to paragraph (a) of this Section 10.2 shall be applied in reduction of the Facility Lessee's obligation to pay such amount if not already paid by the Facility Lessee or, if already paid by the Facility Lessee, shall, so long as no Significant Lease Default or Lease Event of Default (other than Lease Events of Default arising as a result of such Event of Loss) shall have occurred and be continuing, be applied to reimburse the Facility Lessee for its payment of such amount; and (iii) the balance, if any, of such payments remaining thereafter shall be apportioned between the Owner Lessor and the Facility Lessee as their respective interests may appear. Notwithstanding the foregoing, if the Facility Lessee shall have elected to rebuild or replace the Facility pursuant to Section IO.l(a), any insurance proceeds received by the Owner Lessor, the Lease Indenture Trustee or the Facility Lessee as a result of the occurrence of an Event of Loss described in clause (a) or (b) of the definition of Event of Loss shall be applied as provided in Section 11.7. Keystone Facility Lease 21 HOUO I '587609.2.

Section 10.3 Rebuild or Replace. The Facility Lessee's right to rebuild or replace any Facility pursuant to clause (a) of Section 10.1 shall be subject to the fulfillment, at the Facility Lessee's sole cost and expense, in addition to the conditions contained in said clause (a), of the following conditions: (a) no Lease Event of Default shall have occurred and be continuing; (b) Section 10.1(a) of on the date the FacilityLesseeshall give notice pursuant to its election to rebuild or replace the Facility in accordance with this Section 10.3, either (i) the Owner Participant shall have received an opinion reasonably satisfactory to it from Skadden, Arps, Slate, ▇▇▇▇▇▇▇ & ▇▇▇▇ (Illinois) or its affiliates, or from a nationally recognized tax counsel selected by the Owner Participant and reasonably acceptable to the Facility Lessee, to the effect that such rebuilding would not result in any unindemnified tax consequences (determined based on the indemnification provisions contained in the Operative Documents) to the Owner Participant, (ii) an indemnity against such risk in form and substance reasonably satisfactory to the Owner Participant from or guaranteed by an entity that meets the Minimum Credit Rating, or (iii) any other indemnity arrangements against such risk satisfactory to the Owner Participant; (c) on the date the FacilityLessee shall give notice pursuant to Section 10.l(a) of its election to rebuild or replace the Facility in accordance with this Section 10.3, the Facility Lessee shall deliver to the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee (i) a report of the Engineering Consultant, or such other independent engineer reasonably satisfactory to the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee, to the effect that the rebuilding or replacement of the Facility is technologically feasible and economically viable and that such rebuilding or replacement can be completed by a date that is 36 months prior to the end of the Basic Lease Term or 12 months prior to the expiration of any Renewal Lease Term then in effect or which has been elected by the Facility Lessee, and (ii) an appraisal of an Independent Appraiser reasonably acceptable to the Owner Participant, and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee to the effect that the Facility will, after completion of rebuilding or replacement, have at least the same value, residual value, utility and useful life as the Facility immediately prior to the Event of Loss, assuming the Facility was then in the condition required to have been maintained by the terms of this Facility Lease and such rebuilding or replacement will not result in the Facility being "limited use" property within the meaning of Rev. Proc. 75-28, 1975-1 C.B. 752 or Rev. Proc. 76-30, 1976-2 C.B. 647; (d) on the date the FacilityLessee shall give notice pursuant to Section lO.l(a) of its election to rebuild or replace the Facility in accordance with this Section 10.3, the Facility Lessee shall demonstrate to the reasonable satisfaction of the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee, that it will have adequate financial resources, from insurance proceeds or otherwise, to complete such rebuilding or replacement; Keystone Facility Lease 22 HOUOI:587609.2.

(e) .on the date the FacilityLessee shall give notice pursuant to Section lO.l(a) of its election to rebuild or replace the Facility in accordance with this Section 10.3, the Facility Lessee shall deliver an Officer's Certificate of the Facility Lessee to the effect that it reasonably believes that it will have sufficient funds available to continue to pay Periodic Lease Rent or Renewal Lease Rent, as the case may be, while the Facility is being rebuilt; (f) the Facility Lessee shall cause the rebuilding or replacement of the Facility to commence as soon as practicable after notifying the Owner Lessor and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee and the Pass Through Trustee pursuant to Section lO.l(a), of its election to rebuild or replace the Facility, and in all events within 24 months of the occurrence of the event that caused such Event of Loss and will cause work on such rebuilding or replacement to proceed diligently thereafter. As the rebuilding or replacement of the Facility progresses, title to an undivided interest equal to the Owner Lessor's Percentage in the rebuilt or replacement Facility shall vest in the Owner Lessor and such undivided interest shall become subject to this Facility Lease and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lien of the Lease Indenture and be deemed a part of the Facility Interest for all purposes of this Facility Lease, automatically and without any further act by any Person; and (g) on the date of the completion of such rebuilding or replacement of the Facility (the "Rebuilding Closing Date"), the following documents shall be duly authorized, executed and delivered and, if appropriate, filed for recordation by the respective party or parties thereto and shall be in full force and effect, and an executed counterpart of each thereto shall be delivered to the Owner Lessor, the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee: (i) supplements to this Facility Lease subjecting an undivided interest equal to the Owner Lessor's Percentage in the rebuilt or replacement Facility to this Facility Lease (with no change in Purchase Price or the Periodic Lease Rent or Allocated Rent or Renewal Lease Rent as a result of such rebuilding or replacement), (ii) so long as the Lien of the Lease Indenture shall not have been terminated or discharged, supplements to the Lease Indenture subjecting such undivided interests in the rebuilt or replacement facilities to the Lien of the Lease Indenture, (iii) such recordings and filings as may be reasonably requested by the Owner Participant and so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee to be made or filed, (iv) an opinion of counsel of the Facility Lessee, such counsel and such opinion to be reasonably satisfactory to the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee to the effect that (A) the supplements to this Facility Lease required by clause (i) above constitute effective instruments for subjecting such undivided interests in the rebuilt or replacement facilities to this Facility Lease, (B) the supplements to the Lease Indenture required by clause (ii) above, if any, constitute effective instruments for subjecting such undivided interests in the rebuilt or replacement facilities to the Lien of the Lease Indenture, and (C) all filings and other action necessary to perfect and protect the Owner Lessor's and, if applicable, the Lease Indenture Trustee's interest in such undivided interests in the rebuilt or replacement facilities have been accomplished, (v) an appraisal by an Independent Appraiser, certifying that the Facility as so rebuilt or replaced has a current and residual value, remaining useful life and utility at least equal to the current and residual value, remaining useful life and utility of the Keystone Facility Lease 23 HOUO I :587609.2.

Facility immediately prior to the Event of Loss giVmg rise to such repair or replacement (assuming the Facility was in the condition and repair required to be maintained by the terms of this Facility Lease and such rebuilding or replacement has not resulted in the Facility being "limited use" property within the meaning of Rev. Proc. 75-28, 1975 C.B. 752 or Rev. Proc. 76-30, ▇▇▇▇-▇ ▇.▇. ▇▇▇), (▇▇) a report by an independent engineer certifying that such Facility as so rebuilt or replaced is in a state of repair and condition required by this Facility Lease, (vii) an Officer's Certificate of the Facility Lessee certifying as to compliance with this Section 10.3 and that no Event of Default shall have occurred and be continuing as a result of the rebuild or replacement, and (viii) satisfactory evidence as to the compliance with Section 11 of this Facility Lease with respect to the Facility, as so rebuilt or replaced. Whether or not the transactions contemplated by this Section 10.3 are consummated, the Facility Lessee agrees to pay or reimburse, on an After-Tax Basis, any costs or expenses (including reasonable legal fees and expenses) incurred by the Owner Lessor, the Owner Participant, the Equity Investor, the Lease Indenture Trustee and the Pass Through Trustee in connection with the transactions contemplated by this Section 10.3. Section 10.4 Application of Payments Not Relating to an Event of Loss. (a) In the event that during the Facility Lease Term title to, or the use of all or any portion of, the Facility Interest is requisitioned or taken by or pursuant to a request of any Governmental Entity under the power of eminent domain or otherwise for a period which does not constitute an Event of Loss, the Facility Lessee's obligation to pay all installments of Periodic Lease Rent or Renewal Lease Rent with respect to the Facility Interest shall continue for the duration of such requisitioning or taking. The Facility Lessee shall be entitled to receive and retain for its own account all sums payable for any such period by such Governmental Entity as compensation for such requisition or taking of possession. Any amount referred to in this Section 10.4(a) which is payable to the Facility Lessee shall not be paid to the Facility Lessee, or if it has been previously paid directly to the Facility Lessee, shall not be retained by the Facility Lessee, if at the time of such payment a Significant Lease Default or Lease Event of Default shall have occurred and be continuing, but shall be paid to and held by the Owner Lessor or, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee as security for the obligations of the Facility Lessee under this Facility Lease, and at such time as there shall not be continuing any such Significant Lease Default or Lease Event of Default, such amount shall be paid to the Facility Lessee. (b) Any insurance proceeds with respect to the Facility Interest received at any time by the Owner Lessor, the Lease Indenture Trustee or the Facility Lessee under any of the insurance policies required to be maintained by the Facility Lessee under Section 11 as a result of any damage to the Facility or any part thereof which does not constitute an Event of Loss shall be applied as follows: (i) in accordance with Section 11.7; and (ii) the balance, if any, of such insurance proceeds remaining thereafter shall be paid to the Facility Lessee. Keystone Facility Lease 24 HOUOI:587609.2.

SECTION 11 INSURANCE Section ll.1Property Insurance.Subject to Section 11.6, the Facility Lessee will maintain (or cause to be maintained) all risk property insurance customarily carried by prudent operators of coal-fired electric generating facilities of comparable size and risk of the Facility, and against loss or damage from such causes as are customarily insured against, which includes coverage for boiler and machinery coverage to cover mechanical breakdown and business interruption and, in any case, subject to availability on commercially reasonable terms, in an amount equal to the Facility Lessee's portion of the Maximum Probable Loss of the Facility (as adjusted pursuant to Section 11.3(e)), subject to a deductible, as respects the Facility Lessee's interest, not to exceed $2,500,000 per occurrence for property damage, except $5,000,000 per occurrence in respect of boiler and machinery coverage and a 60-day waiting period for business interruption or such other higher amounts customarily maintained by prudent operators of coal­ fired electric generating facilities of comparable size and risk of the Facility. Section ll.2Liability Insurance.Subject to Section 11.6, the Facility Lessee will maintain (or cause to be maintained) commercial general liability insurance, including contractual liability coverage and sudden and accidental pollution liability coverage, and commercial automobile liability insurance, insuring against claims for bodily injury (including death) and property damage to third parties arising out of the ownership, operation, maintenance, condition and use of the Facility and the Facility Site, with limits of not less than $50,000,000 per occurrence and in the annual aggregate scaled proportionately to the Facility Lessee's interest with a deductible not to exceed $2,500,000 per occurrence as respects the Facility Lessee's interest or such other higher amount customarily maintained by prudent operators of coal-fired electric generating facilities of comparable size and risk of the Facility. The Facility Lessee will periodically review the liability insurance maintained by it or on its behalf and will, if necessary, revise such coverage and limits (including deductibles) in order that the liability insurance maintained by it or on its behalf is consistent with that maintained by prudent operators of similar facilities of comparable size and risk to the Facility; provided that the Facility Lessee may not (except as permitted by Section 11.6 below) increase deductibles above or decrease coverage or limits below the requirements set forth herein without the written consent of the Owner Lessor, which such consent shall not be unreasonably withheld. Such liability insurance may be purchased either in a single limit or in combination with a general and an excess policy. Section 11.3Provisions with Respect to Insurance. (a) In respect of the insurance required to be maintained or caused to be maintained by the Facility Lessee under this Section 11, the Facility Lessee will, or will use reasonable efforts in respect of insurance that it does not directly effect, but for which it has benefit, subject to Section 11.6 below, (i) place the insurance maintained pursuant to this Section 11.3 with companies having an A.M. Best rating of at least "A-" or, if not so rated, of comparable financial strength, (ii) except in the case of any insurance issued pursuant to Section 11.1, name the Owner Lessor, the Lessor Manager (both in its individual capacity and as manager), the Owner Participant, the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Lease Indenture Trustee and the Pass Through Trustee as additional Keystone Facility Lease 25 HOUOl:587609.2.

insureds, as their interests may appear, (iii) in the case of insurance issued pursuant to Section 11.1, name the Owner Lessor, the Lessor Manager (both in its individual capacity and as manager), the Owner Participant, the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Lease Indenture Trustee and the Pass Through Trustee as additional named insured and/or loss payees, as appropriate, (iv) cause the insurance companies to agree to waive all claims for premiums from, and all subrogation rights against, the Owner Lessor, the Lessor Manager, the Owner Participant, the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Lease Indenture Trustee and the Pass Through Trustee, and (v) cause such insurance to be primary without right of contribution of any other insurance carried by or on behalf of the Owner Lessor, the Owner Participant, the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Lease Indenture Trustee and the Pass Through Trustee with respect to their respective interests in the Facility and the Facility Site. (b) The Facility Lessee will, subject to Section 11.6 below, use its reasonable efforts to provide that the respective interests of the Owner Lessor, the Owner Participant, the Equity Subsidiary, the Equity Subsidiary Holding Company, the Equity Investor, the Lease Indenture Trustee and the Pass Through Trustee shall not be invalidated by any act or neglect of the Facility Lessee, or any breach or violation by the Facility Lessee of any warranties, declarations or conditions contained in the property insurance policies or by the use of the Facility for purposes more hazardous than permitted by such policies. Additionally, the Facility Lessee will, subject to Section 11.6 below, use its reasonable efforts to provide that the liability insurance policies required to be maintained hereunder shall be endorsed to provide that, inasmuch as the policies are written to cover more than one insured, all terms, conditions, insuring agreements and endorsements, with the exception of limits of liability, shall operate in the manner as if there were a separate policy covering each insured. The Facility Lessee shall, at its own expense, make or cause to be made all proofs of loss and take all other steps necessary to collect the proceeds of such insurance. (c) All of the insurance policies required by this Section II may cover other operations, facilities and properties of the Facility Lessee or Reliant or its Affiliates as long as the limits of insurance available to the Facility are not less than the requirements set forth herein. (d) Claims and losses, if any, under any insurance policies required to be carried under this Section II shall be adjusted with the insurance companies, including the filing of appropriate proceedings, by, subject to the Owners Agreement, the Facility Lessee. (e) The Maximum Probable Loss will be adjusted (i) within 60 days after the close of each fiscal quarter during which the cumulative cost of Modifications (other than Severable Modifications that are not Required Modifications) to the Facility Interest exceeds an additional I 0% of the Purchase Price since the most recent adjustment of the Maximum Probable Loss pursuant to this Section !1.3(e) and (ii) on each fifth anniversary of the most recent adjustment of Maximum Probable Loss pursuant to this Section 11.3(e); provided, that the first such adjustment shall occur no later than the fifth anniversary of the Closing Date. Such adjustment shall be based on an analysis, at the Facility Lessee's expense, of an independent insurance expert from a nationally recognized insurance brokerage firm selected by the Facility Lessee and reasonably acceptable to the Owner Lessor. As soon as practicable after any such Keystone Facility Lease 26 HOUOL587609.2.

adjustment, the Facility Lessee shall, subject to the terms of this Section 11, cause the its property insurance policies to carry coverage of at least the adjusted Maximum Probable Loss. Section 11.4Reports. Within 10 Business Days after expiration and renewal of any insurance policy required to be maintained pursuant to this Section 11, the Facility Lessee shall provide the Owner Lessor, the Equity Investor, the Owner Participant, and as long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee and the Pass Through Trustee certificates from insurance brokers or carriers to the effect that such policy is in effect and in the case of policies maintained pursuant to Section 11.1 and 11.2, indicating their status as additional insureds, loss payees or additional named insured as required pursuant to Section 11.3(a). Such insurance certificates shall provide for at least 45 days' prior written notice (10 days for non-payment of premium) to the Owner Lessor, the Equity Investor, the Owner Participant, the Lease Indenture Trustee and the Pass Through Trustee, in the event of cancellation, or non-renewal, by the insurance carriers, of such policies and the procedure for payment of insurance proceeds upon the occurrence of a Significant Lease Default or Lease Event of Default or upon the occurrence of an Event of Loss as specified in Section 11.7. Each year the Facility Lessee shall furnish an Officer's Certificate of the Facility Lessee certifying that all premiums in respect of such policies are current and that such coverage is in compliance with all insurance requirements set forth in this Section 11. Section 11.5Additional Insurance by Owner Lessor At any time the Owner Lessor (either directly or in the name of the Owner Participant, the Equity Subsidiary, the Equity Subsidiary Holding Company or the Equity Investor) or the Lease Indenture Trustee may at its own expense and for its own account carry insurance with respect to its respective interest in the Facility Interest, provided that such insurance does ·not in any way interfere with the Facility Lessee's ability to obtain insurance with respect to the Facility Interest described in this Section 11. Any insurance payments received from policies maintained by the Owner Lessor, the Equity Subsidiary, the Equity Subsidiary Holding Company, the Equity Investor or the Lease Indenture Trustee pursuant to the previous sentence shall be retained by such Person, without reducing or otherwise affecting the Facility Lessee's obligations hereunder. Section II.6 Amendment of Requirements. (a) If any insurance required to be maintained by the Facility Lessee pursuant to this Section 11 (including the limits or deductibles or any other terms under policies for such insurance) ceases to be available on a commercially reasonable basis, the Facility Lessee shall provide written notice to the Owner Lessor and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee accompanied by a letter from the Facility Lessee's insurance broker stating that such insurance is unavailable on a commercially reasonable basis. Such notice shall be given not less than thirty (30) days prior to the scheduled date for renewal of any such policy. Upon receipt of such notice by the Owner Lessor, the Owner Lessor and the Facility Lessee shall immediately enter into good faith negotiations in order to obtain an alternative to such insurance. (b) In the event that the Owner Lessor and the Facility Lessee carmot reach a resolution acceptable to both parties within ten (10) days, the Owner Lessor and the Facility Lessee shall make arrangements for the formation of an insurance panel consisting of the Facility Keystone Facility Lease 27 HOU01:587609.2.

Lessee's insurance advisor (or broker), the Owner Lessor's insurance advisor (or broker) and an independent insurance expert from a nationally recognized insurance brokerage firm, chosen by the Facility Lessee and reasonably acceptable to the Owner Lessor. Such independent expert shall conduct a separate review of the relevant insurance requirements of this Section II and the market for such insurance at the time, giving due consideration to the representations of both insurance advisors, and upon conclusion of such review shall issue a written report stating whether such insurance is available or unavailable on a commercially reasonable basis. (c) If the insurance expert concludes that such insurance is not available on a commercially reasonable basis, the insurance expert shall provide a written recommendation (which shall include the amount and type of insurance which is available upon a commercially reasonable basis) not less than fifteen (15) days before the date for renewal of such insurance. The Facility Lessee shall, prior to the expiration of the insurance then in effect, obtain the insurance required by this Section ll that is available on a commercially reasonable basis. If the senior unsecured long-term debt rating of the Facility Lessee shall be rated at least BBB-by S&P and Baa3 by ▇▇▇▇▇'▇ at the time of renewal, the recommendation of the insurance expert shall be conclusive and binding upon the Facility Lessee and the Facility Lessee shall, for the immediately succeeding one (1) year policy period, only be required to carry the insurance required by this Section 11 that the expert has certified is available on a commercially reasonable basis. (d) If the senior unsecured long-term debt of the Facility Lessee is below BBB-by S&P and Baa3 by ▇▇▇▇▇'▇ at such time of renewal and in the Owner Participant's reasonable judgment, keeping the insurance coverage at the level that is available on a commercially reasonable basis could reasonably be expected to result in a Material Adverse Effect or involve any material risk of the occurrence of any material adverse effect being incurred by the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor, the Lessor Manager, the Lease Indenture or the Pass Through Trustee, then the Facility Lessee shall (a) comply with this Section 11 without regard to this Section 11.6 or (b) obtain the insurance that is available on a commercially reasonable basis and provide collateral or credit support for the difference of a type and in an amount satisfactory to the Owner Participant. For the purposes of this Section 11.6, insurance will be considered "not available on a commercially reasonable basis" if it is not obtainable or obtainable only at excessive costs or other unreasonable terms which are not justified in terms of the risk to be insured and is generally not being carried by or applicable to projects or operations similar to the Facility because of such excessive costs or other unreasonable terms. (e) All reasonable fees, costs and expenses associated with the insurance panel (including the review by the insurance expert) shall be for the sole account of the Facility Lessee. Section II. 7 Application of Insurance Proceeds. (a) So long as no Significant Lease Default or Lease Event of Default shall have occurred and be continuing, all insurance proceeds with respect to the Facility Interest on account of any damage to or destruction of the Facility or any part thereof (in each case less the actual costs, fees and expenses incurred in the collection thereof) other than proceeds arising out HOUO I :587609.2. Keystone Facility Lease 28

of an Event of Loss, shall be paid to and retained by the Facility Lessee for application in repair or replacement of the affected property or other purpose as determined by the Facility Lessee. Promptly after receiving Actual Knowledge that a Significant Lease Default or Lease Event of Default shall have occurred and be continuing, the Facility Lessee shall notify the insurer under any property insurance policy providing coverage of the Facility Interest of the existence of such Significant Lease Default or Lease Event of Default. The Facility Lessee shall not have the exclusive right to provide such notice to any such insurer respecting the Facility Interest. The Owner Lessor, the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee shall have the right, but not the obligation, to notify the insurer under any such property insurance policy of the occurrence of any Significant Lease Default or Lease Event of Default. After receipt of any such notification, each such insurer shall pay the proceeds of any property insurance policies to the Owner Lessor or, if the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee. (b) Within 30 days after receiving Actual Knowledge that an Event of Loss has occurred, the Facility Lessee shall notify the insurer under any property insurance policy providing coverage for such Event of Loss, the Lease Indenture Trustee so long as the Lien of the Lease Indenture shall not have been terminated or discharged, and the Owner Lessor of the occurrence of such Event of Loss. Each of the Facility Lessee, the Owner Lessor and the Lease Indenture Trustee, as applicable, shall provide any necessary endorsements and otherwise cooperate in the processing of any related claims or proceeds in accordance with the terms of this Section 11. (c) Any payment under any policy of insurance maintained pursuant to this Section 11 arising out of an Event of Loss in respect of physical damage to property shall be made jointly to the Facility Lessee and to the Lease Indenture Trustee so long as the Lien of the Lease Indenture shall not have been terminated or discharged, or otherwise to the Facility Lessee and the Owner Lessor. (d) All proceeds of insurance paid to the Facility Lessee and the Lease Indenture Trustee or the Owner Lessor, as the case may be, other than such proceeds paid in connection with an Event of Loss as to which the Facility Lessee has elected (or has been deemed to have elected) to pay Termination Value shall be paid over to the Facility Lessee by such Person upon (i) delivery by the Facility Lessee to the Owner Lessor and the Lease Indenture Trustee, if applicable, of an Officer's Certificate (a) describing in reasonable detail the nature and cost of such repair or restoration and the actual expenditures theretofore made in connection therewith and (b) certifying that the sum requested is a proper item request and has been paid, or is then due and payable, by the Facility Lessee and (ii) receipt by the Owner Lessor and the Lease Indenture Trustee, if applicable, of evidence satisfactory to each of them, in their reasonable judgments that such proceeds, together with funds of the Facility Lessee available for the purposes will be sufficient to complete such repair and restoration of the Facility Interest or portion thereof. Proceeds of property insurance in connection with an Event of Loss as to which the Facility Lessee has agreed to pay Termination Value pursuant to Section 10, shall be applied by the Lease Indenture Trustee or the Owner Lessor on the relevant Termination Date to the payment of such Termination Value. Keystone acility Lease 29 HOUO I :587609.2.

(e) Notwithstanding the foregoing provisions of this Section ll or Section 10, so long as a Significant Lease Default or Lease Event of Default shall have occurred and be continuing, the proceeds of any insurance required to be maintained pursuant to Section 11.1 that would otherwise be payable to or for the account of, or that would otherwise be retained by, the Facility Lessee pursuant to this Section II or Section I 0.2(d) will be held as security for the obligations of the Facility Lessee under this Facility Lease by the Owner Lessor or, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee and, at such time thereafter as no Significant Lease Default or Lease Event of Default shall be continuing, such amount shall be paid promptly to the Facility Lessee. SECTION 12 INSPECTION During the Facility Lease Term, each of the Owner Participant, the Owner Lessor, the Equity Investor, and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee and the Pass Through Trustee and each of their respective representatives may, during normal business hours, on reasonable notice to the Facility Lessee and at their own risk and expense (except, at the expense but not risk, of the Facility Lessee when a Significant Lease Default or a Lease Event of Default has occurred and is continuing), inspect the Facility and the records with respect to the operations and maintenance thereof, in the Facility Lessee's custody or to which the Facility Lessee has access; provided, however, that so long as no Significant Lease Default or Lease Event of Default shall have occurred and be continuing, each such Person shall only be entitled to make one inspection in any twelve-month period, and the respective representatives of the Owner Lessor, the Owner Participant and the Equity Investor shall coordinate such inspections so that they occur simultaneously; provided, further, however, that any such Person may make more than one inspection during the last eighteen months of the Facility Lease Term unless the Facility Lessee has exercised its option under Section 15 to renew this Facility Lease beyond such eighteen month period. Any such inspection will be conducted in accordance with the Owners Agreement and will not unreasonably interfere with the operation or maintenance of the Facility or the conduct by the Facility Lessee of its business and will be in accordance with the Facility Lessee's and the Operator's safety and insurance programs. In no event shall the Owner Lessor, the Owner Participant, the Equity Investor, the Lease Indenture Trustee or the Pass Through Trustee have any duty or obligation to make any such inspection and such Persons shall not incur any liability or obligation by reason of not making any such inspection. Keystone Facility Lease 30 HOUOI:587609.2.

SECTION 13 TERMINATION OPTION FOR BURDENSOME EVENTS Section 13.1Election to Terminate. No later than 12 months after the date the Facility Lessee receives notice or Actual Knowledge of either of the events specified below, the Facility Lessee shall have the right, at its option, upon written notice (the "Burdensome Termination Notice") to the Owner Lessor, the Owner Participant, and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee and the Pass Through Trustee, to terminate this Facility Lease in accordance with Section 13.2 on the Termination Date specified in such notice (which shall be a date which is not less than 30 days nor more than 60 days after the date of such notice) or such later Termination Date as may be necessary for the Facility Lessee to obtain such consents and approvals required for the Facility Lessee to comply with its obligations under this Section 13 (but in no event to exceed 12 months) if: (a) as a result of change in Applicable Law, it shall have become illegal for the Facility Lessee to continue this Facility Lease or for the Facility Lessee to make payments under this Facility Lease or any other Operative Document, and the transactions contemplated by the Operative Documents cannot be restructured to comply with such change in law in a manner reasonably acceptable to the Facility Lessee, the Owner Participant, the Owner Lessor, and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee and the Pass Through Trustee; or (b) one or more events outside the control of the Facility Lessee or any Subsidiary thereof shall have occurred which will, or can reasonably be expected to, give rise to an obligation by the Facility Lessee to pay or indemnify in respect of the Tax Indemnity Agreement or Section 10.1 or 10.2 of the Participation Agreement; provided, however, that (i) such payment or indemnity obligation (and the underlying cost or Tax) can be avoided in whole or in part if this Facility Lease is terminated and the Owner Lessor sells the Owner Lessor's Interest to the Facility Lessee and (ii) the amount of such avoided payments would exceed (on a present value basis, discounted at the Discount Rate, compounded on an annual basis to the date of the termination) three percent of the Purchase Price; and provided, further, that no such termination option shall exist if the applicable indemnitee shall waive its right to, or the Owner Participant shall arrange for payment of (without reimbursement by the Facility Lessee or any guarantor of the Facility Lessee, or any Affiliate of either thereof), amounts of indemnification payments under the Tax Indemnity Agreement or Section 10.1 or 10.2 of the Participation Agreement in excess of such amount as to cause such avoided payments, computed m accordance with the preceding proviso, not to exceed three percent of the Purchase Price. If the Facility Lessee does not give the Burdensome Termination Notice within twelve months of the date the Facility Lessee receives notice or Actual Knowledge of an event or condition described above, the Facility Lessee shall lose its right to terminate this Facility Lease pursuant to this Section 13.1 as a result of such event or condition. Section 13.2Solicitation of QualifYing Cash Bids; Payments Upon ▇▇▇▇▇▇▇▇▇▇▇.▇▇ connection with the delivery of a Burdensome Termination Notice, the Facility Lessee may, but Keystone Facility Lease 31 HOUOI :587609.2.

shall be under no obligation to, make an offer, which offer shall be open for acceptance for not less than 10 days, to purchase the Owner Lessor's Interest on the Termination Date set forth in the Burdensome Termination Notice for cash in an amount at least equal to the Termination Value on such Termination Date (or such later Termination Date as permitted under Section 13.1), on an "as is", "where is" and "with all faults" basis without any representation, other than by the Owner Lessor that the Owner Lessor's Interest is free of Owner Lessor's Liens and a warranty of the Owner Participant as to the absence of Owner Participant's Liens (any such offer by the Facility Lessee, a "Qualifying Cash Bid"). Upon receipt of a Burdensome Termination Notice, the Owner Lessor may, but shall be under no obligation to, sell the Owner Lessor's Interest. If the Facility Lessee makes a Qualifying Cash Bid and the Owner Lessor accepts such offer (which acceptance shall be deemed to have occurred unless the Owner Lessor rejects such offer in writing prior to the expiration date of such offer), the Facility Lessee shall pay the Owner Lessor on the Termination Date (a) the amount of such Qualifying Cash Bid plus (b) all amounts due and payable under Section 13.3 (but shall have no obligation to pay Termination Value). If the Owner Lessor (x) rejects a Qualifying Cash Bid from the Facility Lessee, or (y) if no Qualifying Cash Bid is offered, elects in writing to retain the Owner Lessor's Interest, the Facility Lessee shall pay to the Owner Lessor on the Termination Date all amounts due and payable under Section 13.3 (but shall have no obligation to pay Termination Value). Unless this Facility Lease is to continue as described below, on the Termination Date specified in the Burdensome Termination Notice (or such later Termination Date as permitted under Section 13.1), the balance of the Lessor Section 467 Loan Balance or the Lessee Section 467 Loan Balance (as the case may be) shall be reduced to zero and shall be fully discharged for all purposes. Any transfer in connection with this Section 13 shall be subject to the Owners Agreement. If, within I 0 days of the Termination Date set forth in the Burdensome Termination Notice, the Owner Lessor does not (I) receive a Qualifying Cash Bid from the Facility Lessee, or (2) elect in writing to retain the Owner Lessor's Interest, this Facility Lease shall continue, the Facility Lessee shall lose its right to terminate this Facility Lease for such burdensome event, and any and all rights that the Owner Lessor had immediately prior to the receipt of the Burdensome Termination Notice shall remain in full force and effect in all respects. Section 13.3 Procedure for Exercise of Termination Option. If the Facility Lessee shall have exercised its option to terminate the Facility Lease under Section 13.1, on the Termination Date specified in the Burdensome Termination Notice (or such later Termination Date as permitted under Section 13.1), the Facility Lessee shall, subject to the last sentence of Section 13.2, pay to the Owner Lessor (a) all amounts of Supplemental Lease Rent (including all reasonable out-of-pocket costs and expenses of the Owner Lessor, the Owner Participant, the Lease Indenture Trustee and the Pass Through Trustee, all sales, use, value added and other Taxes required to be indemnified by the Facility Lessee pursuant to Section 10.2 of the Participation Agreement associated with the exercise of the tennination option pursuant to this Section 13 and all indemnity amounts) due and payable or unpaid or accrued on or prior to the Termination Date, and (b) any other payment obligation of the Facility Lessee under the Operative Documents (other than Periodic Lease Rent or Renewal Lease Rent due on or after the Termination Date) due and payable or unpaid or accrued before such Termination Date, but the Facility Lessee shall not be required to pay Termination Value.All Rent payments under Section 13.2 and this Section 13.3 shall, to the extent required by Section 3.6, be made to the Lease Indenture Trustee. Concurrently with the payment of all sums specified in Section 13.2 and this Section 13.3 (i) Periodic Lease Rent, or Renewal Lease Rent, as the case may be, shall Keystone Facility Lease 32 HOU01:587609.2.

cease to accrue, (ii) the Facility Lessee shall cease to have any liability to the Owner Lessor with respect to (including Indemnity the FaCility Interest, except for Supplemental Lease Rent and other obligations those under Sections 10.1 and 10.2 of the Participation Agreement and the Tax Agreement) surviving pursuant to the express terms of any Operative Document, (iii) unless the Facility Lessee assumes the Notes pursuant to Section 13.4, the Owner Lessor shall pay the outstanding principal and accrued interest on the Notes (excluding any Make Whole Premium, if any, due and payable) pursuant to Section 2.10(a) of the Lease Indenture, (iv) this Facility Lease shall terminate, (v) in connection with any sale of the Owner Lessor's Interest pursuant to Section 13.2, the Owner Lessor shall transfer (by an appropriate instrument of transfer in form and substance reasonably satisfactory to the Owner Lessor and prepared by and at the expense of the Facility Lessee) all of its right, title and interest in and to the Owner Lessor's Interest to the Facility Lessee or its designee on an "as is", "where is" and "with all faults" basis, without representations or warranties other than a warranty as to the absence of Owner Lessor's Liens and a warranty of the Owner Participant as to the absence of Owner Participant's Liens, and (vi) the Owner Lessor shall execute and deliver appropriate releases and other documents or instruments necessary or desirable to effect the foregoing, all to be prepared, filed and recorded (as appropriate) at the cost and expense of the Facility Lessee. It shall be a condition of the termination of this Facility Lease pursuant to this Section 13 that the Facility Lessee shall pay all amounts it is obligated to pay under Section 13.2 and this Section 13.3.. If the Facility Lessee fails to consummate the termination option under this Section 13 after giving notice of its intention to do so, (A) this Facility Lease shall continue, (B) such failure to consummate shall not constitute a default under this Facility Lease, and (C) unless such failure is a consequence of a failure of the Owner Lessor or Owner Participant to fulfill their obligations under this Section 13, the Facility Lessee will lose its right to terminate this Facility Lease pursuant to this Section 13 as a result of such event or condition during the remainder of the Facility Lease Term, but the Facility Lessee shall in any event (without relieving the Owner Lessor of any liability hereunder) pay the amounts set forth in clause (a) above. Anything to the contrary in this Section 13 notwithstanding, the Facility Lessee and the Owner Lessor agree for the benefit of the Lease Indenture Trustee (without relieving the Owner Lessor of any liability hereunder) that, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, no termination pursuant to this Section 13 shall be effective (regardless of whether the Owner Lessor shall elect to retain or sell the Facility Interest in connection with such proposed termination) unless and until the Facility Lessee shall have assumed the Notes pursuant to Section 13.4 or the Owner Lessor shall have paid all outstanding principal and accrued interest on the Notes and all other amounts due under the Lease Indenture on the proposed Termination Date. Section 13.4Assumption of the Notes. Notwithstanding the foregoing provisions of Section 13.2 (except for the provision relating to the reduction and discharge of the Lessor Section 467 Loan Balance or the Lessee Section 467 Loan Balance), if (a) the Facility Lessee submits a Qualifying Cash Bid, and the Owner Lessor accepts such Qualifying Cash Bid and the Facility Lessee shall purchase the Facility Interest pursuant to this Section 13, (b) the Facility Lessee shall have executed and delivered an assumption agreement to assume the Notes as permitted by and in accordance with Section 2.1O(b) of the Lease Indenture, (c) all other conditions contained in such Section 2.1O(b) shall have been satisfied, and (d) no Significant Lease Default or Lease Event of Default shall have occurred and be continuing after giving effect to such assumption, then (x) the obligation of the Facility Lessee to pay the purchase price Keystone Facility Lease 33 HOU01:587609.2.

set forth in its QualifYing Cash Bid shall be satisfied to the extent the outstanding principal amount of and accrued interest on the Notes is so assumed by the Facility Lessee and (y) the Owner Lessor shall have no further obligation to prepay the outstanding principal and accrued interest on the Notes. SECTION 14 TERMINATION FOR OBSOLESCENCE; PARTIAL RELEASE OF INTERESTS Section 14.1 Termination. Upon at least six months' prior written notice to the Owner Lessor, the Owner Participant and, so long as the Lien of the Lease Indenture has not been terminated or discharged, the Lease Indenture Trustee and the Pass Through Trustee (which notice shall be accompanied by a certification by the management committee or other governing body of the Facility Lessee as to one or more of the matters described in clause (a) and (b) below and an Officer's Certificate setting forth in reasonable detail the basis on which it is exercising this termination option), the Facility Lessee shall have the option, so long as no Lease Event of Default shall have occurred and be continuing, to terminate this Facility Lease with respect to the Facility Interest on any Termination Date occurring on or after the sixth anniversary of the Closing Date (the date of termination selected by the Facility Lessee being the "Obsolescence Termination Date") which proposed Obsolescence Termination Date shall be set forth in the notice on the terms and conditions set forth in this Section 14 if: (a) the Facility Interest is economically or technologically obsolete, as a result of (i) a change in Applicable Law, regulation or tariff of general application, or (ii) imposition by the PERC or any other Governmental Entity having or claiming jurisdiction over the Facility Lessee or the Facility Interest of any conditions or requirements (including, without limitation, requiring significant capital improvements to the Facility) upon the availability, continued effectiveness or renewal of any Governmental Approval required for the ownership or operation of the Facility Interest; or (b) the Facility Interest is otherwise economically or technologically obsolete or the Facility Interest is surplus to the Facility Lessee's needs or is no longer useful in its trade or business, as determined by the management committee or other governing body of the Facility Lessee in good faith, including, without limitation, as a result of (x) a change in the markets for the wholesale purchase and/or sale of energy or (y) any material abrogation of power purchase or sale agreements or any other reason. Section 14.2Solicitation of Offers. If the Facility Lessee shall give the Owner Lessor notice pursuant to Section 14.1 and the Owner Lessor shall not have elected to retain the Owner Lessor's Interest pursuant to Section 14.3, the Facility Lessee shall, (i) as non-exclusive agent for the Owner Lessor, use commercially reasonable efforts to obtain bids from third parties which are not Affiliates of the Facility Lessee and subject (to the extent applicable to such transfer) to any right of first refusal contained in the Owner Agreements, sell the Owner Lessor's Interest on the Obsolescence Termination Date, and (ii) covenant that it will not sell the Owner Lessor's Interest to itself or an Affiliate or any third party with whom the Facility Lessee or an Affiliate thereof has an arrangement to use or operate the Facility Interest to generate power for the Keystone Facility Lease 34 HOUO I :587609.2.

benefit of the Facility Lessee or any Affiliate thereof after the termination of this Facility Lease. All of the proceeds of any such sale will be for the account of the Owner Lessor; provided that so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the proceeds of such sale shall be paid directly to the Lease Indenture Trustee. The Owner Lessor shall also have the right but not the obligation, to obtain bids for the sale of such Owner Lessor's Interest either directly or through agents other than the Facility Lessee. At least 120 days prior to the Obsolescence Termination Date, the Facility Lessee shall certify to the Owner Lessor and the Lease Indenture Trustee each bid or offer, the amount and terms thereof and the name and address of the party (which shall not be the Facility Lessee, any Affiliate or any third party with whom it or an Affiliate has an arrangement to use or operate the Facility to generate power for the benefit ofthe Facility Lessee or such Affiliate after the termination of this Facility Lease with respect to the Facility Interest) submitting such bid or offer. Section 14.3Right of Owner Lessor to Retain the Owner Lessor's Interest. The Owner Lessor may irrevocably elect to retain, rather than sell, the Owner Lessor's Interest by giving notice to the Facility Lessee at least 90 days prior to the Obsolescence Termination Date. If the Owner Lessor elects to retain such Owner Lessor's Interest pursuant to this Section 14.3, on the Obsolescence Termination Date the Facility Lessee shall pay to the Owner Lessor (a) all Supplemental Lease Rent (including all reasonable out-of-pocket costs and expenses of the Owner Lessor, the Owner Participant, the Lease Indenture Trustee and the Pass Through Trustee (excluding the fees and costs of any broker unless engaged by the Facility Lessee on the Owner Lessor's behalf) and all sales, use, value added and other Taxes required to be indemnified by the Facility Lessee pursuant to Section I 0.2 of the Participation Agreement associated with the exercise of the termination option pursuant to this Section 14.3 due and payable on such Obsolescence Termination Date) and (b) any other·payment obligation of the Facility Lessee under the Operative Documents (other than Periodic Lease Rent or Renewal Lease Rent due on or after but not before the Obsolescence Termination Date) due and unpaid on the Obsolescence Termination Date and any amounts due and unpaid or unpaid or accrued on the Obsolescence Termination Date under any other Operative Document, but shall not be required to pay Termination Value with respect to the Facility Interest. Unless this Facility Lease continues pursuant to Section 14.5, on the Obsolescence Termination Date, the balance of the Lessor Section 467 Loan Balance or the Lessee Section 467 Loan Balance (as the case may be) shall be reduced to zero and shall be fully discharged for all purposes. Concurrently with the payment of all sums required to be paid pursuant to this Section 14.3, (i) Periodic Lease Rent or Renewal Lease Rent, as the case may be, shall cease to accrue, (ii) the Facility Lessee's obligations under Sections ▇, ▇, ▇, ▇▇ ▇▇▇ ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, (▇▇▇) the Facility Lessee shall cease to have any other liability hereunder to the Owner Lessor, except for Supplemental Lease Rent and other obligations (including those under Sections I 0.1 and I 0.2 of the Participation Agreement and the Tax Indemnity Agreement) surviving pursuant to the express terms of any Operative Document, (iv) the Owner Lessor shall pay the outstanding principal and accrued interest on the Notes pursuant to Section 2.10(a) of the Lease Indenture, (v) this Facility Lease shall terminate, (vi) the Facility Lessee will return the Owner Lessor's Interest to the Owner Lessor in accordance with Section 5.1, and (vii) the Owner Lessor shall execute and deliver appropriate releases and other documents or instruments necessary or desirable to effect the foregoing, all to be prepaid, filed and recorded (as appropriate) at the cost and expense of the Facility Lessee. It shall be a condition to the termination ofthis Facility Lease pursuant to this Section 14.3 that the Facility Lessee shall pay all amounts that it is obligated to pay under this Section 14.3. Keystone Facility Lease 35 HOUO I :587609.2.

Section 14.4Procedure for Exercise of Termination Option. If the Owner Lessor has not elected to retain the Owner Lessor's Interest with respect to the Facility Interest in accordance with Section 14.3 , on the Obsolescence Termination Date the Owner Lessor shall sell the Owner Lessor's Interest to the bidder or bidders (which shall not be the Facility Lessee, an Affiliate thereof or any third party with whom the Facility Lessee or an Affiliate thereof has an arrangement to use or operate the Facility Interest to generate power for the benefit of the Facility Lessee or any such Affiliate after the termination of this Facility Lease), that shall have submitted the highest cash bid or bids with respect to the Owner Lessor's Interest, and the Facility Lessee shall certify to the Owner Lessor, the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee that such buyer is not the Facility Lessee, any Affiliate thereof or any third party with whom it or an Affiliate has an arrangement to use or operate the Facility to generate power for the benefit of the Facility Lessee or such Affiliate after the termination of this Facility Lease. On the Obsolescence Termination Date, the Facility Lessee shall pay to the Owner Lessor (a) the excess, if any, of Termination Value determined as of such Obsolescence Termination Date over the proceeds from the sale of the Owner Lessor's Interest paid to or retained by the Owner Lessor, (b) any other payment obligation of the Facility Lessee under the Operative Documents (other than Periodic Lease Rent or Renewal Lease Rent due on or after, but not before, the Obsolescence Termination Date) due and unpaid or accrued and unpaid on the Obsolescence Termination Date and any amounts due and unpaid on the Obsolescence Termination Date under any Operative Document, (c) all amounts of Supplemental Lease Rent (including all reasonable out-of-pocket costs and expenses of the Owner Lessor, the Owner Participant, the Lease Indenture Trustee and the Pass Through Trustee (excluding the fees and costs of any broker unless engaged by the Facility Lessee on the Owner Lessor's behalf) and all sales, use, value added and other Taxes required to be indemnified by ·the Facility Lessee pursuant to Section I 0.2 of the Participation Agreement) due and payable on such Obsolescence Termination Date, plus (d) any premium due on the Notes. Unless this Facility Lease continues pursuant to Section 14.5, on the Obsolescence Termination Date, the balance of the Lessor Section 467 Loan Balance or the Lessee Section 467 Loan Balance (as the case may be) shall be reduced to zero and shall be fully discharged for all purposes. Concurrently with the payment of all sums required to be paid pursuant to this Section 14.4, (i) Periodic Lease Rent or Renewal Lease Rent, as the case may be, shall cease to accrue, (ii) the Facility Lessee's obligations under Sections ▇, ▇, ▇, ▇▇ ▇▇▇ ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇, (▇▇▇) the Facility Lessee shall cease to have any other liability hereunder to the Owner Lessor, except for Supplemental Lease Rent and other obligations (including Sections 10.1 and 10.2 of the Participation Agreement and the Tax Indemnity Agreement) surviving pursuant to the express terms of any Operative Document, (iv) the Owner Lessor will pay the outstanding principal and accrued interest on the Notes (but excluding any Make Whole Premium) pursuant to Section 2.10 of the Lease Indenture, (v) this Facility Lease shall terminate, (vi) the Owner Lessor will transfer (by an appropriate instrument of transfer in form and substance reasonably satisfactory to the Owner Lessor and prepared and recorded by and at the expense of the Facility Lessee) the Owner Lessor's Interest under this Section 14.4, to the purchaser on an "as is", "where is" and "with all faults" basis, without representations or warranties other than a warranty as to the absence of Owner Lessor's Liens and a warranty from the Owner Participant as to the absence of Owner Participant's Liens, and (vii) the Owner Lessor shall execute and deliver appropriate releases and other documents or instruments necessary or desirable to effect the foregoing, all to be prepaid, filed and recorded (as appropriate) at the cost and expense of the Keystone Facility Lease 36 HOU01:587609.2.

Facility Lessee. Unless the Owner Lessor shall have elected to retain the Owner Lessor's Interest pursuant to Section 14.3 or the Owner Lessor with the consent of the Facility Lessee shall have entered into a legally binding contract to sell the Owner Lessor's Interest, the Facility Lessee may, at its election, revoke its notice of termination on at least 30 days' prior notice to the Owner Lessor, the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee and the Pass Through Trustee in which event this Facility Lease shall continue with respect to the Facility Interest; provided, however, that the Facility Lessee shall not be permitted to re-initiate a notice to terminate pursuant to Section 14.1 more than once in any five year period. The Owner Lessor shall be under no duty to solicit bids, to inquire into the efforts of the Facility Lessee to obtain bids or otherwise take any action in arranging any such sale of the Owner Lessor's Interest other than, if the Owner Lessor has not elected to retain the Owner Lessor's Interest, to transfer the Owner Lessor's Interest in accordance with clause (vi) of this Section 14.4. It shall be a condition of the Owner Lessor's obligation to consummate a sale of the Owner Lessor's Interest that the Facility Lessee shall pay all amounts it is obligated to pay under this Section 14.4. If no sale shall occur on the Obsolescence Termination Date, the notice of termination shall be deemed revoked and this Facility Lease shall continue with respect to the Facility Interest in full force and effect in accordance with its terms (without prejudice to the Facility Lessee's right to exercise its rights under this Section 14). Section 14.5 Certain Conditions to Termination.Anything to the contrary in this Section 14 notwithstanding, the Facility Lessee and the Owner Lessor agree for the benefit of the Lease Indenture Trustee (without relieving the Owner Lessor of any liability hereunder) that, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, no termination pursuant to this Section 14 shall be effective and the Facility Lessee's rights and obligations under this Facility Lease shall remain in full force and effect in all respects (regardless of whether the Owner Lessor shall elect to retain or sell the Owner Lessor's Interest in connection with such proposed termination) unless and until the Owner Lessor shall have paid all outstanding principal and accrued interest on the Notes and all other amounts due under the Lease Indenture as of such proposed date oftermination, excluding any Make Whole Premium. Section 14.6 Partial Release of Interest; Further Assurances The Facility Lessee shall be entitled to obtain a release of a portion of the Facility Site or Facility Interest (the "Released Interest") in the event that the Facility Lessee shall have delivered to the Owner Lessor and the Owner Participant (i) a certificate of the Engineering Consultant certifying that (A) the Released Interest (taking into account any Released Interest Related Rights) is not necessary for the operation of the Facility in accordance with Prudent Industry Practice and (B) the release of the Released Interest (taking into account any Released Interest Related Rights) will not diminish the current value, residual value, utility or remaining useful life of the Facility by more than a de minimis amount, and (ii) an Officer's Certificate of the Facility Lessee certifying that (x) the release of the Released Interest (taking into account any Released Interest Related Rights) will not cause the Facility to become "limited use" property, within the meaning of Rev. Proc. 75-28, 1975-1 C.B. 752 or Rev. Proc. 76-30, 1976-2 C.B. 647 and (y) no Significant Lease Default or Lease Event of Default has occurred and is continuing. (b) In addition, the Facility Lessee shall be entitled to obtain a release of a portion of the Facility Interest that is obsolete or not necessary or useful in the operation of the Keystone Facility Lease 37 HOUOI:587609.2.

Facility Interest in accordance with Prudent Industry Practice (the "Surplus Released Interest") in the event that the Facility Lessee shall have delivered to the Owner Lessor and the Owner Participant a certificate of the Facility Lessee certifYing that the Surplus Released Interest is surplus or obsolete and not necessary for the operation of the Facility in accordance with Prudent Industry Practice and such Surplus Released Interest will be scrapped. (c) Subject to Section 14.6(a), with respect to any Released Interest, the Owner Lessor shall execute and deliver and take such other action as the Facility Lessee may reasonably request to grant to the Facility Lessee or its designee, easements, appurtances, covenants, and other similar rights and interests as the Facility Lessee may reasonably request in connection with any ownership, maintenance, subdivision or operation of any Released Interest or improvements or operations located on or in respect of such Released Interest (the "Released Interest Related Rights"); provided that no such Released Interest Related Rights shall materially and adversely affect the Equity Investor, the Equity Subsidiary Holding Company, the Equity Subsidiary, the Owner Participant, the Owner Lessor or the Lease Indenture Trustee or any of their Affiliates. (d) In connection therewith, the Owner Lessor and the Owner Participant shall execute and deliver, at the sole cost and expense of the Facility Lessee, such releases, discharges, conveyances and other documents as may be reasonably requested by the Facility Lessee to effect such release and to convey and transfer title to such Released Interest or Surplus Released Interest to the Facility Lessee. Keystone Facility Lease 38 HOUOI :587609.2.

SECTION 15 LEASE RENEWAL Section 15.1 First Wintergreen Renewal Lease Term. Not earlier than 42 months prior to the expiration of the Basic Lease Term, unless a Significant Lease Default or a Lease Event of Default shall have occurred and be continuing, the Facility Lessee may deliver to the Owner Lessor notice (which notice may be in addition to a notice of the Facility Lessee's tentative interest in electing a FMV Renewal Lease Term under Section 15.3) of the Facility Lessee's tentative interest in renewing this Facility Lease for a term (the "First Wintergreen Renewal Lease Term") commencing on the day following the last day of the Basic Lease Term and ending on the earlier of (a) the latest date as of which the estimated fair market value of the Facility Interest determined pursuant to the Appraisal Procedure by an Independent Appraiser selected by the Facility Lessee and reasonably acceptable to the Owner Lessor, subsequent to the Facility Lessee's tentative election of the First Wintergreen Renewal Lease Term (but not earlier than 36 months prior to the expiration of the Basic Lease Term), shall equal or exceed 20% of the Purchase Price (without taking into account inflation or deflation subsequent to the Closing Date) and (b) the date as of which the sum of the number of years of the proposed First Wintergreen Renewal Lease Term and the Basic Lease Term shall equal 75% of the estimated economic useful life of the Facility as determined by such Independent Appraiser pursuant to the Appraisal Procedure. Unless the Facility Lessee shall have irrevocably elected to renew this Facility Lease for a FMV Renewal Lease Term under Section 15.3, and provided that neither a Significant Lease Default nor a Lease Event of Default shall have occurred and be continuing on such notice date or on the date of expiration of the Basic Lease Term, on or prior to 18 months before the expiration of the Basic Lease Term, the ·Facility Lessee may deliver to the Owner Lessor a further notice irrevocably electing to renew this Facility Lease for the First Wintergreen Renewal Lease Term determined as aforesaid and the First Wintergreen Renewal Lease Term shall thereupon take effect as provided herein. Section 15.2 Second Wintergreen Renewal Lease Term. Not earlier than 42 months prior to the expiration of the First Wintergreen Renewal Lease Term, unless a Significant Lease Default or a Lease Event of Default shall have occurred and be continuing, the Facility Lessee may deliver to the Owner Lessor notice (which notice may be in addition to a notice of the Facility Lessee's tentative interest in electing a FMV Renewal Lease Term under Section 15.3) of the Facility Lessee's tentative interest in renewing this Facility Lease for a term (the "Second Wintergreen Renewal Lease Term" and together with the First Wintergreen Renewal Lease Term, the "Wintergreen Renewal Lease Terms") commencing on the day following the last day of the First Wintergreen Renewal Lease Term and ending on the earlier of (a) the latest date as of which the estimated fair market value of the Facility Interest determined pursuant to the Appraisal Procedure by an Independent Appraiser selected by the Facility Lessee and reasonably acceptable to the Owner Lessor, subsequent to the Facility Lessee's tentative election of the Second Wintergreen Renewal Lease Term (but not earlier than 36 months prior to the expiration of the First Wintergreen Renewal Lease Term), shall equal or exceed 20% of the Purchase Price (without taking into account inflation or deflation subsequent to the Closing Date) and (b) the date as of which the sum of the number of years of the proposed Second Wintergreen Renewal Lease Term, the First Wintergreen Renewal Lease Term and the Basic Lease Term shall equal 75% of the estimated economic useful life of the Facility as determined by such Independent Keystone Facility Lease 39 HOU0!:587609.2.

Appraiser pursuant to the Appraisal Procedure. Unless the Facility Lessee shall have irrevocably elected to renew this Facility Lease for a FMV Renewal Lease Term under Section 15.3, and provided that neither a Significant Lease Default nor a Lease Event of Default shall have occurred and be continuing on such notice date or on the date of expiration of the First Wintergreen Renewal Lease Term, on or prior to 18 months before the expiration of the First Wintergreen Renewal Lease Term, the Facility Lessee may deliver to the Owner Lessor a further notice irrevocably electing to renew this Facility Lease for the Second Wintergreen Renewal Lease Term determined as aforesaid and the Second Wintergreen Renewal Lease Term shall thereupon take effect as provided herein. Section 15.3Fair Market Value Renewal Lease Terms. Not earlier than 42 months prior to the expiration of the Basic Lease Term, the First Wintergreen Renewal Lease Term, the Second Wintergreen Renewal Lease Term, or any other Renewal Lease Term, unless a Significant Lease Default or Lease Event of Default shall have occurred and be continuing, the Facility Lessee may deliver to the Owner Lessor notice (which notice may be in addition to a notice of the Facility Lessee's tentative interest in electing the First Wintergreen Renewal Lease Term or the Second Wintergreen Renewal Lease Term) of the Facility Lessee's tentative interest in renewing this Facility Lease for a term (each such term, a "FMV Renewal Lease Term") commencing on the day following the last day of the Basic Lease Term or a Renewal Lease Term otherwise expiring and extending for no less than two years and no more than five years; provided that, unless such FMV Renewal Lease Term extends to the end of the useful life of the Facility, no such FMV Renewal Lease Term shall extend beyond the date that is three (3) years prior to the end of the useful life of the Facility (as set forth in the most recent appraisal obtained pursuant to Section 4.l(n) of the Participation Agreement, Section 15.1 or 15.2 of this Facility Lease or Section 2.3(a) or (b) of the Site Lease and·Sublease). Unless the Facility Lessee shall have irrevocably elected to renew this Facility Lease for a Wintergreen Renewal Lease Term pursuant to Sections 15.1 or 15.2 (it being understood that the exercise by the Facility Lessee of its right to renew this Facility Lease at the end of the Basic Lease Term or at the end of the First Wintergreen Renewal Lease Term pursuant to Sections 15.1 or 15.2, respectively, shall not impair its right to renew this Facility Lease at any time thereafter pursuant to this Section 15.3), and provided that neither a Significant Lease Default nor a Lease Event of Default shall have occurred and be continuing on any such notice date or on the date of expiration of the Basic Lease Term or the Renewal Lease Term immediately preceding such FMV Renewal Lease Term, as the case may be, on or prior to 18 months before the expiration of the existing Basic Lease Term or the relevant Renewal Lease Term, as the case may be, the Facility Lessee may deliver to the Owner Lessor a further notice irrevocably electing to renew this Facility Lease for the FMV Renewal Lease Term tentatively elected as aforesaid, and the FMV Renewal Lease Term shall thereupon take effect as provided herein. Section 15.4Renewal Lease Rent for the Renewal Lease Terms. (a) Renewal Lease Rent shall be paid in arrears on each Rent Payment Date during each Renewal Lease Term. The installment of Renewal Lease Rent payable in arrears on each such Rent Payment Date during each Wintergreen Renewal Lease Term shall be equal to the lesser of(i) the Fair Market Rental Value of the Facility Interest (as determined, in the case of the First Wintergreen Renewal Lease Term, not more than 36 months prior to the end of the Basic Lease Term, and in the case of the Second Wintergreen Renewal Lease Term, not more Keystone Facility Lease 40 HOUOI:587609.2.

than 36 months prior to the end of the First Wintergreen Renewal Lease Term), and (ii) 50% of the average Periodic Lease Rent during the Basic Lease Term. The average Periodic Lease Rent during the Basic Lease Term shall be determined without regard to: (x) any amount attributable to adjustments to Periodic Lease Rent pursuant to Section 3.5(a)(i), (y) unless the applicable Modifications were financed by an Additional Equity Investment, Section 3.5(a)(ii), and (z) any Additional Amounts attributable to alternative rent schedules instituted pursuant to Section 3.5(b). (b) Renewal Lease Rent payable on each Rent Payment Date during the initial FMV Renewal Lease Term shall be equal to 101% of the Fair Market Rental Value of the Facility Interest determined not more than 36 months prior to the commencement of such FMV Renewal Lease Term; provided, however, that if, on or prior to the commencement of any FMV Renewal Lease Term, the Owner Lessor and the Facility Lessee agree or, in the absence of such agreement, if the Facility Lessee shall provide the Owner Participant with an opinion of counsel reasonably satisfactory to the Owner Participant (as to matters of form, substance and authorship) or with a private letter ruling, in each case to the effect that the Renewal Lease Rent for a FMV Renewal Lease Term may be set at the Fair Market Rental Value without resulting in adverse Federal income tax consequences to the Owner Participant under Section 467 of the Code, the Renewal Lease Rent for the remainder of any current and for any subsequent FMV Renewal Lease Term will be equal to 100% of the Fair Market Rental Value of the Facility Interest. Section 15.5 Determination of Fair Market Rental Value. The Fair Market Rental Value of the Facility Interest as of the commencement of any Renewal Lease Term shall be determined by agreement of the Owner Lessor and the Facility Lessee within six months after receipt by the Owner Lessor of the tentative notice from the Facility Lessee of its election to renew pursuant to Section 15.1, 15.2 or 15.3 (but not more than 36 months before the commencement of such Renewal Lease Term) or, if they shall fail to agree within such six month period, shall be determined by an appraisal conducted pursuant to the Appraisal Procedure by an Independent Appraiser. The appraiser's fees and expenses shall be borne by the Facility Lessee. Section 15.6 Termination Value During Renewal Lease Terms. The amounts which are payable during any Renewal Lease Term in respect of Termination Value shall be determined on the basis of the Fair Market Sales Value of the Facility Interest as of the commencement of such Renewal Lease Term, amortized on a straight-line basis over such Renewal Lease Term to the projected Fair Market Sales Value of the Facility as of the expiration of such Renewal Lease Term, as such Fair Market Sales Value in each case is determined prior to the commencement of such Renewal Lease Term, plus any amount of Renewal Lease Rent accrued and unpaid to the date of termination. In determining Fair Market Sales Value for any Renewal Lease Term, effect shall be given to the encumbrance on the Facility Interest of any Renewal Lease Term available or in force. Keystone Facility Lease 41 HOUO I :587609.2.

SECTION 16 EVENTS OF DEFAULT The following events shall constitute a "Lease Event of Default" hereunder (whether any such event shall be voluntary or involuntary or come about or be effected by operation of law or pursuant to or in compliance with any judgment, decree or order of any court or any order, rule or regulation of any Governmental Entity): (a) the Facility Lessee shall fail to make any payment of Periodic Lease Rent, Renewal Lease Rent or Termination Value after the same shall have become due and such failure shall have continued (taking into account application of the proceeds of any Qualifying Credit Support) for five (5) Business Days after the same shall have become due; or (b) the Facility Lessee shall fail to make any other payment under the Operative Documents, including any payment of Supplemental Lease Rent (other than Excepted Payments, unless the Owner Participant shall have declared a default with respect thereto, or Termination Value) after the same shall have become due and such failure shall have continued unremedied for a period of 30 days after receipt by the Facility Lessee of written notice of such failure from the Owner Participant, the Owner Lessor, the Lease Indenture Trustee or the Pass Through Trustee; or (c) the Facility Lessee shall fail to observe or perform its obligation to maintain (or cause to be maintained) insurance in the amounts and on the terms set forth in Section 11; or (d) the Facility Lessee or any Subsidiary Guarantor (or any other guarantor of the Facility Lessee's obligations hereunder) shall fail to perform or observe any covenant, obligation or agreement to be performed or observed by it (or such guarantor) under this Facility Lease or any other Operative Document (other than any covenant, obligation or agreement contained in the Tax Indemnity Agreement or any covenant, obligation or agreement referred to in clauses (a), (b), (c), (e), (k), (I) or (p) of this Section 16) in any material respect, which failure shall continue unremedied for 30 days after receipt by the Facility Lessee of written notice thereof from the Owner Participant, the Owner Lessor, the Lease Indenture Trustee or any Pass Through Trustee; provided, however, that if such condition cannot be remedied within such 30-day period, then the period within which to remedy such condition shall be extended up to an additional 180 days, so long as the Facility Lessee diligently pursues such remedy and such condition is reasonably capable of being remedied within such additionall80-day period and the continuation of such failure during the period of such extension would not have a Material Adverse Effect; provided,further, that in the case of the Facility Lessee's obligation set forth in clause (a)(ii) of Section 7.1, if, to the extent and for so long as a test, challenge, appeal or proceeding shall be prosecuted in good faith by the Facility Lessee, the failure by the Facility Lessee to comply with such requirement shall not constitute a Lease Event of Default if such test, challenge, appeal or proceeding shall not involve any (i) danger of foreclosure, sale, forfeiture or loss of any part of the Facility Interest or the impairment of the use, operation or maintenance of the Facility in any material respect, (ii) risk of criminal liability asserted against the Owner Lessor, the Owner Participant, the Equity Subsidiary Holding Company, the Equity Keystone Facility Lease 42 HOUOJ:587609.2.

Subsidiary, the Equity Investor or any of their respective Affiliates, or (iii) material risk of the occurrence of any material adverse effect being incurred by the Owner Participant, the Owner Lessor, the Equity Subsidiary, the Equity Subsidiary Holding Company, the Equity Investor, the Lease Indenture Trustee or the Pass Through Trustee including, without limitation, subjecting the Owner Participant or the Owner Lessor to regulation as a public utility under Applicable Law; andprovided,further, that in the case of the Facility Lessee's obligation set forth in clause (a)(ii) of Section 7.1, if the noncompliance is not a type that can be immediately remedied, the failure to comply shall not be a Lease Event of Default if the Facility Lessee is taking all reasonable action to remedy such noncompliance and if, but only if, such noncompliance shall not involve any danger described in clause (i), (ii) or (iii) of the preceding proviso; and provided, further, such noncompliance, or such test, challenge, appeal or proceeding to review shall not extend beyond the date 36 months prior to the scheduled expiration of the Basic Lease Term or any Renewal Lease Term then in effect or elected by the Facility Lessee; or (e) to the extent such covenants are in effect, the Facility Lessee shall fail to perform or observe in any material respect the covenants set forth in Sections 5.3, 5.4, 5.5, 5.6, to the extent such covenant relates to liens in respect of borrowed money, 5.7, or 5.12 of the Participation Agreement, so long as such covenants remain in effect, in each case, within 30 days after the occurrence thereof; or any representation or warranty made by the Facility Lessee or any (f) Subsidiary Guarantor in the Operative Documents (other than a Tax Representation) or in the certificate delivered by the Facility Lessee at the Closing pursuant to Section 4.1(g) of the Participation Agreement shall prove to have been incorrect in any material respect when made and continues to be material and unremedied for a period of 30 days after receipt by the Facility Lessee of written notice thereof; provided, however, that if such condition cannot be remedied within such 30-day period, then the period within which to remedy such condition shall be extended up to an additional 120 days, so long as the Facility Lessee diligently pursues such remedy and such condition is reasonably capable of being remedied within such additional 120-day period, and the continuation of such condition during the period of such extension would not have a Material Adverse Effect; or (g) the Facility Lessee or any Subsidiary Guarantor that is a Significant Subsidiary shall (i) commence a voluntary case or other proceeding seeking relief under the Bankruptcy Code or liquidation, reorganization or other relief with respect to itself or its debts under any bankruptcy, insolvency or other similar law now or hereafter in effect, or apply for or consent to the appointment of a trustee, receiver, liquidator, custodian or other similar official of it or any substantial part of its property, or (ii) consent to, or fail to controvert in a timely manner, any such relief or the appointment of or taking possession by any such official in any voluntary case or other proceeding commenced against it, or (iii) file an answer admitting the material allegations of a petition filed against it in any such proceeding, or (iv) make a general assignment for the benefit of creditors; or (h) Facility Lessee or an involuntary case or other proceeding shall be commenced against the any Subsidiary Guarantor that is a Significant Subsidiary seeking (i) liquidation, reorganization or other relief with respect to it or its debts under the Bankruptcy Code or any bankruptcy, insolvency or other similar law now or hereafter in effect, or (ii) the HOU01:587609.2. Keystone Facility Lease 43

appointment of a trustee, receiver, liquidator, custodian or other similar official with respect to it or any substantial part of its property or (iii) the winding-up or liquidation of the Facility Lessee or such Subsidiary Guarantor; and such involuntary case or other proceeding shall remain undismissed and unstayed for a period of 60 days; or (i) default under any bond, debenture, note or other evidence of Indebtedness (but excluding Indebtedness arising under the Operative Documents, under the Related Facility Leases or Nonrecourse Indebtedness) for money borrowed by the Facility Lessee or any Subsidiary Guarantor under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any Indebtedness of the Facility Lessee or any Subsidiary Guarantor, whether such indebtedness now exists or shall hereafter be created, which Indebtedness is in an aggregate principal amount exceeding $50,000,000 (as such amount is Escalated) and which default shall have resulted in such Indebtedness becoming or being declared due and payable prior to the date on which it would otherwise have become due and payable, without such Indebtedness having been discharged, or such acceleration having been rescinded or annulled; or G) the occurrence of a Change of Control; or (k) the failure by the Facility Lessee to comply with Section 14.2 or 14.3 of the Participation Agreement; or (I) the Facility Lessee shall fail (i) to cause a Qualifying Credit Support to be replaced, or reinstated to the full amount required, in accordance with Section 5.8(e) of the Participation Agreement within 90 days of any drawing thereon, or (ii) to perform or observe any of the other covenants in Section 5.8 of the Participation Agreement; or (m) any Lien on a material portion of the Indenture Estate created in favor of the Lease Indenture Trustee shall cease to be enforceable and of the same effect and priority purported to be created thereby; or (n) the failure by the Facility Lessee to comply in any material respect with the restriction on subleases under Section 19; or (o) one or more judgments or decrees shall be entered against the Facility Lessee or any Subsidiary Guarantor involving in the aggregate a liability (not paid or fully covered by insurance (taking into account any deductibles)) of $50,000,000 (as such amount may be Escalated) or more, and all such judgments or decrees shall not have been vacated, discharged, stayed or bonded pending appeal within 30 days from the entry thereof; or (p) the failure by the Facility Lessee or any other Person party to the Funding Agreement or the Subordinated Working Capital Facility to perform its respective obligations thereunder in any material respect and such failure continues for 30 days, or the Funding Agreement or the Subordinated Working Capital Facility is terminated or modified in any material respect or otherwise fails to be in full force and effect in all material respects (other than in accordance with its terms) and is not reinstated within 30 days thereafter. Keystone Facility Lease 44 HOUOI:587609.2.

SECTION 17 REMEDIES Section 17.1 Remedies for Lease Event of Default. Upon the occurrence of any Lease Event of Default and at any time thereafter so long as the same shall be continuing, the Owner Lessor may, at its option, declare this Facility Lease to be in default by written notice to the Facility Lessee (provided that upon the occurrence of a Lease Event of Default described in paragraph (g) or (h) of Section 16, this Facility Lease shall automatically be deemed to be in default without the need for giving any notice) and at any time thereafter, so long as the Facility Lessee shall not have remedied all outstanding Lease Events of Default, the Owner Lessor may do one or more of the following as the Owner Lessor in its sole discretion shall elect, to the extent permitted by, and subject to compliance with any mandatory requirements of, Applicable Law then in effect: (a) proceed by appropriate court action or actions, either at law or in equity, to enforce performance by the Facility Lessee at the Facility Lessee's sole cost and expense, of the applicable covenants and terms of this Facility Lease or to recover damages for breach thereof; (b) by notice in writing to the Facility Lessee, terminate this Facility Lease whereupon all right of the Facility Lessee to the possession and use of the Facility Interest under this Facility Lease shall absolutely cease and terminate but the Facility Lessee shall remain liable as hereinafter provided; and thereupon, the Owner Lessor may demand that the Facility Lessee, and the Facility Lessee shall, upon written demand of the Owner Lessor and at the Facility Lessee's expense, forthwith return possession of the Facility Interest to the Owner Lessor, in the manner and condition required by, and otherwise in accordance with all of the provisions of Section 5 except those provisions relating to periods of notice; and the Owner Lessor may thenceforth hold, possess and enjoy the same free from any right of the Facility Lessee, or its successor or assigns, to use the Facility Interest for any purpose whatever and on the date of such termination, the balance of the Lessor Section 467 Loan Balance or the Lessee Section 467 Loan Balance (as the case may be) shall be reduced to zero and shall be fully discharged for all purposes; (c) sell the Owner Lessor's Interest at public or private sale, as the Owner Lessor may determine, free and clear of any rights of the Facility Lessee under this Facility Lease and without any duty to account to the Facility Lessee with respect to such sale or for the proceeds thereof (except to the extent required by paragraph (f) below if the Owner Lessor elects to exercise its rights under said paragraph and by Applicable Law), in which event the Facility Lessee's obligation to pay Periodic Lease Rent or Renewal Lease Rent hereunder due for any periods subsequent to the date of such sale shall terminate (except to the extent that Periodic Lease Rent or Renewal Lease Rent is to be included in computations under paragraph (e) or (f) below if the Owner Lessor elects to exercise its rights under said paragraphs), and on the date of such sale, the balance of the Lessor Section 467 Loan Balance or the Lessee Section 467 Loan Balance (as the case may be) shall be reduced to zero and shall be fully discharged for all purposes; Keystone Facility Lease 45 HOU0\:587609.2.

(d) hold, keep idle or lease to others the Owner Lessor's Interest as the Owner Lessor in its sole discretion may determine, free and clear of any rights of the Facility Lessee under this Facility Lease and without any duty to account to the Facility Lessee with respect to such action or inaction or for any proceeds with respect thereto, except that the Facility Lessee's obligation to pay Periodic Lease Rent or Renewal Lease Rent with respect to the Facility Interest due for any periods subsequent to the date upon which the Facility Lessee shall have been deprived of possession and use of the Facility Interest pursuant to this Section 17 shall be reduced by the net proceeds, if any, received by the Owner Lessor from leasing the Facility Interest to any Person other than the Facility Lessee; (e) whether or not the Owner Lessor shall have exercised, or shall thereafter at any time exercise, any of its rights under paragraph (b) above with respect to the Facility Interest, the Owner Lessor, by written notice to the Facility Lessee specifying a Termination Date that shall be not earlier than 1 0 days after the date of such notice, may demand that the Facility Lessee pay to the Owner Lessor, and the Facility Lessee shall pay to the Owner Lessor, on the Termination Date specified in such notice, any due and unpaid or accrued and unpaid Periodic Lease Rent or Renewal Lease Rent due before the Termination Date, any Supplemental Lease Rent due and payable as of the payment date specified in such notice, plus as liquidated damages for loss of a bargain and not as a penalty (in lieu of the Periodic Lease Rent or Renewal Lease Rent due for any periods subsequent to the date of such sale), (i) an amount equal to the excess, if any, of the Termination Value computed as of the Termination Date specified in such notice over the Fair Market Sales Value of the Owner Lessor's Interest as of the Termination Date specified in such notice, or (ii) an amount equal to the excess, if any, of Termination Value computed as of the Termination Date specified in such notice over the Fair Market Rental Value of the Owner Lessor's Interest until the end of the Basic Lease Term or the then current Renewal Lease Term, after discounting such Fair Market Rental Value semiannually to present value as of the Termination Date specified in such notice at a rate equal to the Lease Debt Rate, or (iii) an amount equal to the Termination Value computed as of the Termination Date specified in such notice and, upon payment of such Termination Value by the Facility Lessee pursuant to the clause (iii) and all other Rent then due and unpaid or accrued and unpaid by the Facility Lessee, the Owner Lessor will forthwith transfer to the Facility Lessee (or its designee) in accordance with this Section 17.1(e) on an "as is", "where is" and "with all faults" basis, without representation or warranty other than a warranty as to the absence of Owner Lessor's Liens accompanied by a warranty of the Owner Participant as to the absence of Owner Participant's Liens, all of its interest in the Owner Lessor's Interest and execute, acknowledge and deliver, and record and file (as appropriate) appropriate releases, including a release of the Lien of the Lease Indenture, and all other documents or instructions necessary or desirable to effect the foregoing all in form and substance reasonably satisfactory to the Owner Lessor and at the cost and expense of the Facility Lessee, and upon payment of such amounts under either clauses (i) and (ii) of this paragraph (e), this Facility Lease, and the Facility Lessee's obligation to pay Periodic Lease Rent or Renewal Lease Rent hereunder due for any periods subsequent to the date of such payment shall terminate; provided that on the Termination Date specified above, the balance of the Lessor Section 467 Loan Balance or the Lessee Section 467 Loan Balance (as the case may be) shall be reduced to zero and shall be fully discharged for all purposes; and (f) if the Owner Lessor shall have sold the Owner Lessor's Interest pursuant to paragraph (c) above, the Owner Lessor may, if it shall so elect, demand that the Facility Keystone Facility Lease 46 HOUOL587609.2.

Lessee pay to the Owner Lessor, and the Facility Lessee shall pay to the Owner Lessor, as liquidated damages for loss of a bargain and not as a penalty (in lieu of the Periodic Lease Rent or Renewal Lease Rent due for any periods subsequent to the date of such sale), an amount equal to (i) any unpaid Periodic Lease Rent or Renewal Lease Rent due or accrued and unpaid before the date of such sale, plus (ii) the amount, if any, by which Termination Value computed as of the Termination Date next preceding the date of such sale or, if such sale occurs on a Rent Payment Date or a Termination Date then computed as of such date, exceeds the net proceeds of such sale, and, upon payment of such amount, this Facility Lease and the Facility Lessee's obligation to pay Periodic Lease Rent or Renewal Lease Rent for any periods subsequent to the date of such payment shall terminate. In addition, the Facility Lessee shall be liable, except as otherwise provided above, for (i) any and all unpaid Periodic Lease Rent or Renewal Lease Rent due hereunder before or during the exercise of any of the foregoing remedies, (ii) in the case of a Lease Event of Default described in Section 160), any Change of Control Premium payable under Section 4.2(a) of the Lease Indenture, and (iii) on an After-Tax Basis, for legal fees and other costs and expenses incurred by reason of the occurrence of any Lease Event of Default or the exercise of the Owner Lessor's remedies with respect thereto, including the repayment in full of any costs and expenses necessary to be expended in connection with the return of the Facility Interest in accordance with Section 5, including, any costs and expenses incurred by the Owner Lessor, the Owner Participant, the Lease Indenture Trustee or the Pass Through Trustee in connection with retaking constructive possession of, or in repairing, the Facility Interest in order to cause it to be in compliance with all maintenance standards imposed by this Facility Lease. Section 17.2 Cumulative Remedies. The remedies in this Facility Lease provided in favor of the Owner Lessor shall not be deemed exclusive, but shall be cumulative and shall be in addition to all other remedies in its favor existing at law or in equity; and the exercise or beginning of exercise by the Owner Lessor of any one or more of such remedies shall not preclude the simultaneous or later exercise by the Owner Lessor of any or all of such other remedies. To the extent permitted by Applicable Law, the Facility Lessee hereby waives any rights now or hereafter conferred by statute or otherwise which may require the Owner Lessor to sell, lease or otherwise use the Facility Interest or any Component thereof in mitigation of the Owner Lessor's damages as set forth in this Section 17 or which may otherwise limit or modifY any of the Owner Lessor's rights and remedies in this Section 17. Keystone Facility Lease 47 HOUOl:587609.2.

Section 17.3No Delay or Omission to be Construed as Waiver. No delay or omission to exercise any right, power or remedy accruing to the Owner Lessor upon any breach or default by the Facility Lessee under this Facility Lease shall impair any such right, power or remedy of the Owner Lessor, nor shall any such delay or omission be construed as a waiver of any breach or default, or of any similar breach or default hereafter occurring; nor shall any waiver of a single breach or default be deemed a waiver of any subsequent breach or default. SECTION 18 SECURITY INTEREST AND INVESTMENT OF SECURITY FUNDS. Any moneys received by the Owner Lessor or the Lease Indenture Trustee pursuant to Section 10.2(d) or 11.7 shall, until paid to the Facility Lessee as provided in accordance with such Sections, be held by the Owner Lessor or the Lease Indenture Trustee, as the case may be, as security for the Facility Lessee's obligations under this Facility Lease and be invested in Cash Equivalents by the Owner Lessor or the Lease Indenture Trustee, as the case may be, at the sole risk of the Facility Lessee, from time to time as directed in writing by the Facility Lessee if such investments are reasonably available for purchase. Any gain (including interest received) realized as the result of any such Cash Equivalent (net of any fees, commissions, taxes and other expenses, if any, incurred in connection with such Cash Equivalent) shall be applied or remitted to the Facility Lessee in the same manner as the principal invested. SECTION 19 FACILITY LESSEE'S RIGHT TO SUBLEASE The Facility Lessee shall have the right to sublease the Facility Interest without the consent of the Owner Lessor, the Owner Participant, the Lease Indenture Trustee or the Pass Through Trustee under the following conditions: (a) the sublessee (i) is a solvent corporation, partnership, business trust, limited liability company or other person or entity not then subject to bankruptcy proceedings, (ii) is not involved in material pending or unresolved litigation with the Owner Participant or any Affiliate of the Owner Participant, and (iii) is, or its operating and maintenance obligations under the sublease are guaranteed by, or such obligations are contracted to be performed by, an experienced, reputable operator of coal-fired electric generating assets; (b) the Owner Lessor, the Owner Participant, and so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee and the Pass Through Trustee shall have received an opinion of counsel, which opinion and counsel shall be reasonably. acceptable to each such recipient, to the effect that all material regulatory approvals required to enter into the sublease have been obtained; (c) the sublease does not extend beyond the scheduled expiration of the Basic Lease Term or any Renewal Lease Term then in effect or elected by the Facility Lessee (and may be terminated upon early termination of this Facility Lease) and is expressly subject and subordinate to this Facility Lease; Keystone Facility Lease 48 HOUOl:587609.2.

(d) . all terms and conditions of this Facility Lease and the other Operative Documents remain in effect and the Facility Lessee remains fully and primarily liable for its obligations under this Facility Lease and the other Operative Documents; (e) no Significant Lease Default or Lease Event of Default shall have occurred and be continuing and no additional Lease Default shall occur as a result of such sublease; (f) the sublease prohibits further assignment or subletting; (g) the sublease requires the sublessee to operate and maintain the Facility Interest (or cause the Facility Interest to be operated and maintained) in a manner consistent with this Facility Lease; and (h) the Owner Participant shall have received either (A) a favorable legal opinion of its tax counsel satisfactory to the Owner Participant to the effect that such sublease creates no unindemnified tax risk (determined based on the indemnification provisions contained in the Operative Documents) to the Owner Participant, (B) an indemnity against such risks in form and substance reasonably satisfactory to the Owner Participant from or guaranteed by an entity that meets the Minimum Credit Rating or (C) any other indemnity arrangement against such risks satisfactory to the Owner Participant. As a condition precedent to such sublease, the Facility Lessee shall provide the Owner Lessor, the Owner Participant, and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee with all documentation in respect of such sublease and an opinion of counsel to the effect that such sublease complies with the provisions of this Section 19 (such documentation, counsel and opinion to be reasonably satisfactory to such recipients). The Facility Lessee shall pay, on an After-Tax Basis, all reasonable documented out-of-pocket expenses of the Owner Lessor, the Owner Participant, the Lease Indenture Trustee and the Pass Through Trustee in connection with such sublease. The Facility Lessee shall have the right to sublease the Facility Interest with the consent of the Owner Lessor, the Owner Participant and, so long as the Lien of the Lease Indenture shall not have been terminated or discharged, the Lease Indenture Trustee or the Pass Through Trustee, provided that (x) the total annual rent payments received under the sublease shall be at least equal to 80% of the corresponding total annual rent payments under this Facility Lease and (y) the present value of all scheduled rent payments thereunder (together with any payment made at the closing thereof) shall be at least equal to 90% of the present value of the corresponding Periodic Lease Rent payable under this Facility Lease (discounted at the Discount Rate). SECTION 20 OWNER LESSOR'S RIGHT TO PERFORM If the Facility Lessee fails to make any payment required to be made by it hereunder or fails to perform or comply with any of its other agreements contained herein after notice to the Facility Lessee and failure of the Facility Lessee to so perform or comply within 10 Business Days thereafter, the Owner Lessor or the Owner Participant may itself make such payment or Keystone Facility Lease 49 HOUOl:587609.2.

perform or comply with such agreement in a reasonable manner, but shall not be obligated hereunder to do so, and the amount of such payment and of the reasonable expenses of the Owner Lessor or the Owner Participant incurred in connection with such payment or the performance of or compliance with such agreement, as the case may be, together with interest thereon at the Overdue Rate, to the extent permitted by Applicable Law, shall be deemed to be Supplemental Lease Rent, payable by the Facility Lessee to the Owner Lessor on demand. SECTION2l SECURITY FOR OWNER LESSOR'S OBLIGATION TO THE LEASE INDENTURE TRUSTEE In order to secure the Notes, the Owner Lessor will assign and ▇▇▇▇▇ ▇ ▇▇▇▇ to the Lease Indenture Trustee in and to all of the Owner Lessor's right, title and interest in, to and under this Facility Lease, and grant a security interest in favor of the Lease Indenture Trustee in all of the Owner Lessor's right, title and interest in and to the Facility Interest (other than Excepted Payments and Excepted Rights). The Facility Lessee hereby consents to such assignment and to the creation of such Lien and security interest and acknowledges receipt of copies of the Lease Indenture, it being understood that such consent shall not affect any requirement or the absence of any requirement for any consent of the Facility Lessee under any other circumstances. Unless and until the Facility Lessee shall have received written notice from the Lease Indenture Trustee that the Lien of the Lease Indenture has been fully terminated, the Lease Indenture Trustee shall have the right to exercise the rights of the Owner Lessor under this Facility Lease to the extent set forth in and subject in each case to the exceptions set forth in the Lease Indenture. TO THE EXTENT, IF ANY, THAT THIS FACILITY LEASE CONSTITUTES CHATTEL PAPER (AS SUCH TERM IS DEFINED IN THE UNIFORM COMMERCIAL CODE AS IN EFFECT IN ANY APPLICABLE JURISDICTION), NO SECURITY INTEREST IN THIS FACILITY LEASE MAY BE CREATED THROUGH THE TRANSFER OR POSSESSION OF ANY COUNTERPART HEREOF OTHER THAN THE ORIGINAL COUNTERPART, WHICH SHALL BE IDENTIFIED AS THE COUNTERPART CONTAINING THE RECEIPT THEREFOR EXECUTED BY THE LEASE INDENTURE TRUSTEE ON THE SIGNATURE PAGE THEREOF. SECTION22 WAIVER OF RIGHT TO PARTITION So long as the Facility or any part thereof as originally constructed, reconstructed or added to is used or useful for the generation of electrical power and energy, or until expiration, termination or surrender of this Facility Lease in accordance with the terms of this Facility Lease or the other Operative Documents, whichever first occurs, and in each case not to extend beyond the period permitted by Applicable Law, each of the Owner Lessor and the Facility Lessee waives its right to partition, whether by partition in kind or sale and division of the proceeds thereof, the Facility, any interest therein or portion thereof, including the Facility Interest or any portion thereof and agrees that it will not resort to any action at law or in equity to so partition and further waives the benefit of all laws that may now or hereafter authorize such partition. All instruments of conveyance which effect, evidence or vest the ownership interest of the Owner Keystone Facility Lease 50 HOUOI:587609.2.

Lessor in the Facility Interest, including the Deed and ▇▇▇▇ of Sale shall contain this waiver of right to partition. SECTION23 MISCELLANEOUS Section 23.1Amendments and Waivers. No term, covenant, agreement or condition of this Facility Lease may be terminated, amended or compliance therewith waived (either generally or in a particular instance, retroactively or prospectively) except by an instrument or instruments in writing executed by each party hereto. Section 23.2Notices. Unless otherwise expressly specified or permitted by the terms hereof, all communications and notices provided for herein to a party hereto shall be in writing or by a telecommunications device capable of creating a written record, and any such notice shall become effective (a) upon personal delivery thereof, including by overnight mail or courier service or (b) in the case of notice by such a telecommunications device, upon transmission thereof; provided such transmission is promptly confirmed by the method set forth in clause (a) above, in each case addressed to such party and any copy party at its address set forth below or at such other address as such party or copy party may from time to time designate by written notice to the other party: If to the Owner Lessor: Keystone Lessor Genco LLC ▇/▇ ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇ II ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇ ▇▇▇▇▇-▇▇▇▇ Telephone No.: (▇▇▇) ▇▇▇-▇▇▇▇ Facsimile No.: (▇▇▇) ▇▇▇-▇▇▇▇ Attention: Corporate Trust Administration with a copy to the Owner Participant: PSEGR Keystone Generation, LLC c/o PSEG Resources Inc. ▇▇ ▇▇▇▇ ▇▇▇▇▇, ▇▇▇▇▇ ▇-▇▇ ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇ Telephone No.: (▇▇▇) ▇▇▇-▇▇▇▇ Facsimile No.: (▇▇▇) ▇▇▇-▇▇▇▇ Attention: President Keystone Facility Lease 51 HOUOI:587609.2.

and to the Lease Indenture Trustee: Bankers Trust Company ▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇ Telephone No. (▇▇▇) ▇▇▇-▇▇▇▇ Facsimile No. (▇▇▇) ▇▇▇-▇▇▇▇ Attention: ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ If to the Facility Lessee: Reliant Energy Mid-Atlantic Power Holdings, LLC ▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇ Telephone No.: (▇▇▇) ▇▇▇-▇▇▇▇ Facsimile No.: (▇▇▇) ▇▇▇-▇▇▇▇ Attention: Treasurer Section 23.3Survival.Except for the provisions of Sections 3.4, 3.6, 5, 9 and 17, which shall survive, the warranties and covenants made by each party hereto shall not survive the expiration or termination of this Facility Lease in accordance with its terms. Section 23.4Successors and Assigns. (a) This Facility Lease shall be binding upon and shall inure to the benefit of, and shall be enforceable by, the parties hereto and their respective successors and assigns as permitted by and in accordance with the terms hereof. (b) Except as expressly provided herein or in the other Operative Documents, neither party hereto may assign its interests or transfer its obligations herein without the consent of the other party hereto. Section 23.5 "True Lease". This Facility Lease shall constitute an agreement of lease and nothing herein shall be construed as conveying to the Facility Lessee any right, title or interest in or to the Facility Interest except as lessee only. Section 23.6 Governing Law. This Facility Lease shall be in all respects governed by and construed in accordance with the laws. of the State of New York, including all matters of construction, validity and performance (without giving effect to the conflicts of laws provisions thereof, other than New York General Obligations Law Section 5-1401), except to the extent the laws of the State of Pennsylvania are mandatorily applicable under the laws of the State of Pennsylvania. Section 23.7 Severability. Any provision of this Facility Lease that is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such Keystone Facility Lease 52 HOUOU87609.2.

prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction. Section 23.8 Counterparts. This Facility Lease may be executed by the parties hereto in separate counterparts, each of which, subject to Section 21, when so executed and delivered shall be an original, but all such counterparts shall together constitute but one and the same instrument. Section 23.9Headings and Table of Contents. The headings of the sections of this Facility Lease and the Table of Contents are inserted for purposes of convenience only and shall not be construed to affect the meaning or construction of any of the provisions hereof. Section 23.10 Further Assurances. Each party hereto will promptly and duly execute and deliver such further documents and assurances for and take such further action reasonably requested by the other party, all as may be reasonably necessary to carry out more effectively the intent and purpose ofthis Facility Lease. Section 23.11 Effectiveness. This Facility Lease shall be effective on the Closing Date. Section 23.12 Limitation of ▇▇▇▇▇▇▇▇▇.▇▇ is expressly understood and agreed by the parties hereto that (a) this Facility Lease is executed and delivered by the Trust Company not individually or personally but solely as manager of the Owner Lessor under the LLC Agreement, in the exercise of the powers and authority conferred and vested in it pursuant thereto, (b) each of the representations, undertakings and agreements herein made on the part of the Owner Lessor is made and intended not as personal representations, undertakings and agreements by the Trust Company but is made and intended for the purpose for binding only the Owner Lessor, (c) nothing herein contained shall be construed as creating any liability on the Trust Company individually or personally, to perform any covenant either expressed or implied contained herein, all such liability, if any, being expressly waived by the parties hereto or by any Person claiming by, through or under the parties hereto and (d) under no circumstances shall the Trust Company, be personally liable for the payment of any indebtedness or expenses of the Owner Lessor or be liable for the breach or failure of any obligation, representation, warranty or covenant made or undertaken by the Owner Lessor under this Facility Lease. Section 23.13 Measuring Life. If and to the extent that any of the rights and privileges granted under this Facility Lease, would, in the absence of the limitation imposed by this sentence, be invalid or unenforceable as being in violation of the rule against perpetuities or any other rule or law relating to the vesting of interests in property or the suspension of the power of alienation of property, then it is agreed that notwithstanding any other provision of this Facility Lease, such options, rights and privileges, subject to the respective conditions hereof governing the exercise of such options, rights and privileges, will be exercisable only during (a) the longer of (i) a period which will end twenty-one (21) years after the death of the last survivor of the descendants living on the date of the execution of this Facility Lease of the following Presidents of the United States: ▇▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇, ▇▇▇▇ ▇. ▇▇▇▇▇▇▇, ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇, ▇▇▇▇▇▇ ▇. ▇▇▇▇, ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇, ▇▇▇▇▇▇ ▇.▇. ▇▇▇▇ and ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ or (ii) the period provided under the Uniform Keystone Facility Lease 53 HOUOU87609.2.

Statutory Rule Against Perpetuities or (b) the specific applicable period of time expressed in this Facility Lease, whichever of(a) and (b) is shorter. Keystone Facility Lease 54 HOUOl:587609.2.

NOTICE-TIDS DOCUMENT MAY NOT SELL, CONVEY, TRANSFER, INCLUDE OR INSURE THE TITLE TO THE COAL AND RIGHT OF SUPPORT UNDERNEATH THE SURFACE LAND DESCRIBED OR REFERRED TO HEREIN, AND THE OWNER OR OWNERS OF SUCH COAL MAY HAVE THE COMPLETE LEGAL RIGHT TO REMOVE ALL OF SUCH COAL AND, IN THAT CONNECTION, DAMAGE MAY RESULT TO THE SURFACE OF THE LAND AND ANY HOUSE, BUILDING OR OTHER STRUCTURE ON OR IN SUCH LAND. THE INCLUSION OF TIDS NOTICE DOES NOT ENLARGE, RESTRICT OR MODIFY ANY LEGAL RIGHTS OR ESTATES OTHERWISE CREATED, TRANSFERRED, EXCEPTED OR RESERVED BY THIS INSTRUMENT. [This notice is set forth in the manner provided in Section 1 of the Act of July 17,1957, P.L. 984, as amended, and is not intended as notice of unrecorded instruments, if any]. NOTICE THE UNDERSIGNED, AS EVIDENCED BY THE SIGNATURE(S) TO THIS NOTICE AND THE ACCEPTANCE AND RECORDING OF THIS DEED, (IS, ARE) FULLY COGNIZANT OF THE FACT THAT THE UNDERSIGNED MAY NOT BE OBTAINING THE RIGHT OF PROTECTION AGAINST SUBSIDENCE, AS TO THE PROPERTY HEREIN CONVEYED, RESULTING FROM COAL MINING OPERATIONS AND THAT THE PURCHASED PROPERTY, HEREIN CONVEYED, MAY BE PROTECTED FROM DAMAGE DUE TO MINE SUBSIDENCE BY A PRIVATE CONTRACT WITH THE OWNERS OF THE ECONOMIC INTEREST IN THE COAL. THIS NOTICE IS INSERTED HEREIN TO COMPLY WITH THE BITUMINOUS MINE SUBSIDENCE AND LAND CONSERVATION ACT OF 1966, AS AMENDED 1980, ocT. IO, ▇.▇. ▇▇▇, ▇▇. ▇▇▇ § ▇. WITNESS: RELIANT ENERGY MID-ATLANTIC POWER HOLDINGS, LLC By: OJ_ U:o_ Luthl) Name: \-\< \ o. 'Swe_\\ By:......!JC-...L-.0-___;:::.___ Title: Le o1 (\ <;St S\-();./1:t-0\e(l<_ Notwithstanding any of the foregoing, nothing contained in any of the above Notices shall be deemed to limit or otherwise modify the liability of the Facility Lessee to the Owner Lessor or the other Indemnitees pursuant to the Operative Documents. Signature Page to Keystone Facility Lease Agreement

IN WITNESS WHEREOF, the Owner Lessor and the Facility Lessee have caused this Facility Lease to be duly officers thereunto duly authorized. executed and delivered under seal by their respective KEYSTONE LESSOR GENCO LLC By: WILMINGTON jiRUST COMPANY, not in its indivi'a!capacity but solely as Lessor Mag r under the LLC Agreement By: --------L-----------------­ Name: Title: RELIANT ENERGY MID-ATLANTIC POWER HOLDINGS, LLC Signature Page to Keystone Facility Lease Agreement

Receipt of the original counterpart of the foregoing Facility Lease is hereby acknowledged on this 24th day of August, 2000. BANKERS TRUST COMPANY, as Lease Indenture Trustee By: \..... ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇ VICE PRESIDENT · Name: Title: Signature Page to Keystone Facility Lease Agreement

SCHEDULE 1-A to Facility Lease PERIODIC LEASE RENT Rent Payment Date Periodic Lease Rent Jan 2 2020 Jul 2 2020 Jan 2 2021 Jul 2 2021 Jan 2 2022 Jul 2 2022 Jan 2 2023 Jul 2 2023 Jan 2 2024 Jul 2 2024 Jan 2 2025 Jul 2 2025 Jan 2 2026 Jul 2 2026 Jan 2 2027 Jul 2 2027 Jan 2 2028 Jul 2 2028 Jan 2 2029 Jul 2 2029 Jan 2 2030 Jul 2 2030 Jan 2 2031 Jul 2 2031 Jan 2 2032 Jul 2 2032 Jan 2 2033 Jul 2 2033 Jan 2 2034 May 24 2034 $5,616,779.08 $42,584,205.20 $4,687,602.63 $6,160,473.23 $6,168,487.86 $33,546,589.14 $5,027,933.01 $29,638,789.62 $4,101,791.56 $14,308,808.38 $3,834,988.79 $14,010,015.96 $3,536,832.86 $7, 863,037. 50 $8,703,150.35 $0.00 $0.00 $0.00 $0.00 $17,559,642.47 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 (11) ?/Z) 8/18/00 Keystone Periodic Lease Rent, 2

SCHEDULE 1-A to Facility Lease PERIODIC LEASE RENT Rent Payment Date Periodic Lease B!!l! $0.00 $0.00 $10,209,979.26 $21,571,444.21 $11,312,559.39 $45,640,559.39 $9,844,350.83 $9,844,350.83 $9,844,350.83 $9,844,350.83 $9,844,350.83 $25,531,771.29 $9,174,059.39 $15,230,162.20 $8,916,583.82 $27,766,583.82 $8,045,996.57 $8,045,996.57 $8,045,996.57 $8,045,996.57 $8,045,996.57 $8,045,996.57 $8,045,996.57 $15,488,629.31 $7,702,258.58 $7,702,258.58 $7,702,258.58 $36,872,258.58 $6,355,042.13 $22,339,951.79 $5,616,779.08 $5,616,779.08 $5,616,779.08 $5,616,779.08 $5,616,779.08 $5,616,779.08 $5,616,779.08 $5,616,779.08 $5,616,779.08 $5,616,779.08 Aug 24 2000 Nov 24 2000 Jan 2 2001 Jul 2 2001 Jan 2 2002 Jul 2 2002 Jan 2 2003 Jul 2 2003 Jan 2 2004 Jul 2 2004 Jan 2 2005 Jul 2 2005 Jan 2 2006 Jul 2 2006 Jan 2 2007 Jul 2 2007 Jan 2 2008 Jul 2 2008 Jan 2 2009 Jul 2 2009 Jan 2 2010 Jul 2 2010 Jan 2 2011 Jul 22011 Jan 2 2012 Jul 2 2012 Jan 2 2013 Jul 2 2013 Jan 2 2014 Jul 2 2014 Jan 2 2015 Jul 2 2015 Jan 2 2016 Jul 2 2016 Jan 2 2017 Jul 2 2017 Jan 2 2018 Jul 2 2018 Jan 2 2019 Jul 2 2019 r1!J fj/.; 8/18/00 sl:;( Periodic Lease Rent , 1 Keystone

SCHEDULE 1·8 to Facility Lease ALLOCATED RENT Rent Payment Period From I2 Nov 24 2000 Jan 2 2001 Jul 2 2001 Jan 2 2002 Jul 2 2002 Jan 2 2003 Jul 2 2003 Jan 2 2004 Jul 2 2004 Jan 2 2005 Jul 2 2005 Jan 2 2006 Jul 2 2006 Jan 2 2007 Jul 2 2007 Jan 2 2008 Jul 2 2008 Jan 2 2009 Jul 2 2009 Jan 22010 Jul22010 Jan 2 2011 Jul 22011 Jan 2 2012 Jul22012 Jan 2 2013 Jul 2 2013 Jan 2 2014 Jul 2 2014 Jan 2 2015 Jul 2 2015 Jan 2 2016 Jul22016 Jan 2 2017 Jul 2 2017 Jan 22018 Jul 2 2018 Jan 2 2019 Jul 22019 Jan 2 2020 Jul 2 2020 Jan 2 2021 Jul 2 2021 Jan 2 2022 Jul 2 2022 Jan 2 2023 Jul 2 2023 Jan 2 2024 Jul 2 2024 Jan 2 2025 Jul 2 2025 Jan 2 2026 Jul 2 2026 Jan 2 2027 Jul 2 2027 Jan 2 2028 Jul 2 2028 Jan 2 2029 Jul 2 2029 Jan 2 2030 Jul 2 2030 Jan 2 2031 Jul 2 2031 Jan 2 2032 Jul 2 2032 Jan 2 2033 Jul 2 2033 AIIOS:IW!R!nl Aug 24 2000 Nov 24 2000 Jan 2 2001 Jul 2 2001 Jan 2 2002 Jul 2 2002 Jan 2 2003 Jul 2 2003 Jan 2 2004 Jul 2 2004 Jan 2 2005 Jul 2 2005 Jan 2 2006 Jul 2 2006 Jan 2 2007 Jul 2 2007 Jan 2 2008 Jul 2 2008 Jan 2 2009 Jul 2 2009 Jan 2 2010 Jul22010 Jan 2 2011 Jul 2 2011 Jan 2 2012 Jul 2 2012 Jan 2 2013 Jul22013 Jan 2 2014 Jul 2 2014 Jan 22015 Jul 2 2015 Jan 2 2016 Jul 2 2016 Jan 2 2017 Jul22017 Jan 2 2018 Jul 2 2018 Jan 2 2019 Jul 2 2019 Jan 2 2020 Jul 2 2020 Jan 2 2021 Jul 2 2021 Jan 2 2022 Jul 2 2022 Jan 2 2023 Jul 2 2023 Jan 2 2024 Jul 2 2024 Jan 2 2025 Jul 2 2025 Jan 2 2026 Jul 2 2026 Jan 2 2027 Jul 2 2027 Jan 2 2028 Jul 2 2028 Jan 2 2029 Jul 2 2029 Jan 2 2030 Jul 2 2030 Jan 22031 Jul 2 2031 Jan 2 2032 Jul 2 2032 Jan 2 2033 $0.00 $2,472,260.22 $0.00 $23,486,835.58 $0.00 $23,421,047.15 $0.00 $23.421.414.68 $0 00 $23,421,412.63 $0.00 $23,421,412.64 $0.00 $23.421.412.64 $0.00 $23,421.412.64 $0.00 $23,421,412.64 $0.00 $23,421.412.64 $0.00 $23.421,412.64 $0.00 $23,421,412.64 $23,291.293.68 $0.00 $23,421,412.64 $0.00 $23,421,412.64 $0.00 $23,421,412.64 $0.00 $23,421,412.64 $0_00 $25.257.542.43 $0.00 $28.626.165.28 $0.00 $28,626,165.28 $0 00 $28,626,165.28 $0.00 $28,626,165.28 $0.00 $28.626.165.28 $0.00 $28,626,165.28 $0.00 $28,626,165.28 $0.00 $28,626,165.28 $0.00 $28,626,165.28 $0.00 $28,626,165.28 $0,00 $28.626,165.28 $0.00 $28.626,165.28 $0.00 $28,626,165.28 $0.00 $28,626,165.28 $0.00 $28.626,165.28 $0.00 $28,626,165.28 8/18/00 Keystone Allocated Rent . 1 --( "V ,;,,

SCHEDULE 1-B to Facility ▇▇▇▇ ALLOCATED RENT Rent Payment Period Allocated Rent Jul 2 2033 Jan 2 2034 Jan 2 2034 May 24 2034 $0.00 $11.370.948.98 8/18/00 ; If'! J;Lj Allocated Rent . 2 Keystone

SCHEDULE 1-C to Facility Lease SECTION 467 LOAN Debt Service Section 467 Loan Balance (21 Date Interest (1l Principal Aug 24 2000 Nov 24 2000 Jan 2 2001 Jul 2 2001 Jan 2 2002 Jul 2 2002 Jan 2 2003 Jul 2 2003 Jan 2 2004 Jul 2 2004 Jan 2 2005 Jul 2 2005 Jan 2 2006 Jul 2 2006 Jan 2 2007 Jul 2 2007 Jan 2 2008 Jul 2 2008 Jan 2 2009 Jul 2 2009 Jan 2 2010 Jul 2 2010 Jan 2 2011 Jul 2 2011 Jan 2 2012 Jul 2 2012 Jan 2 2013 Jul 2 2013 Jan 2 2014 Jul 2 2014 Jan 2 2015 Jul 2 2015 Jan22016 Jul 2 2016 Jan 2 2017 Jul 2 2017 Jan 2 2018 Jul 2 2018 Jan 2 2019 Jul 2 2019 $0.00 $0.00 ($7,737,719.04) ($21 '571,444.21) $12,174,276.19 ($45,640,559.39) $13,576,696.32 ($9,844,350.83) $13,577,063.85 ($9,844,350.83) $13,577,061.80 ($25,531,771.29) $14,247,353.25 ($15,230,162.20) $14,504,828.82 ($27, 766,583.82) $15,375,416.07 ($8,045,996.57) $15,375,416.07 ($8,045,996.57) $15,375,416.07 ($8,045,996.57) $15,375,416.07 ($15,488,629.31) $15,719,154.06 $15,589,035.10 ($7,702,258.58) ($13,450,845.94) ($6,355,042.13) $1,081,460.85 ($5,616,779.08) $17,804,633.56 ($5,616,779.08) $17,804,633.56 ($5,616, 779.08) $19,640,763.35 ($5,616, 779.08) $23,009,386.20 ($5,616,779.08) $23,009,386.20 $0.00 $0.00 $0.00 $260,761.13 $996,50645 $619,815.61 $2,178,790.25 $1,794,680.81 $2,186,916.18 $1,803,068.20 $2,195,586.23 $1,812,030.50 $2,733,516.62 $2,345,500.32 $2,937,800.15 $2,547,991.29 $3,569,59247 $3,171,736 21 $3,549,773.81 $3,151,249.66 $3,528,596.86 $3,129,359.05 $3,505,968 54 $3,105,968.15 $3,732,606.09 $3,328,65942 $2,915,484.76 $3,273,302.71 $3,836,906.52 $4,180,375.19 $4,284,808.60 $4,618,492.11 $4,174,119.14 $4,504,072.41 $4,055,843.50 $4,381,810.88 $3,867,584.18 $4,187,207.23 $3,552,899.80 $3,861,917 97 $0.00 $0.00 ($7, 737,719.04) ($21,832,205.34) $11,177,769.74 ($46,260,375.00) $11,397,906 07 ($11,639,031 64) $11,390,147.67 ($11,647,419.03) $11,381,475.58 ($27,343,801.79) $11,513,836.63 ($17,575,662.52) $11,567,028.67 ($30,314,575.10) $11,805,823.60 ($11,217' 732 78) $11,825,642.27 ($11,197,24623) $11,846,819.21 ($11'175,355.62) $11,869,447.54 ($18,594,59746) $11,986,547.97 $12,260,375.68 ($10,617,743.34) ($16,724,148 65) ($10,191,948.65) ($3,098,914.34) ($9,901,587.68) $13,186,14145 ($9,790,898.22) $13,300,561.15 ($9,672,622.58) $15,258,95247 ($9,484,363 26) $18,822,178.97 ($9, 169,678.88) $19,147,468.23 $0.00 $0.00 $7,737,719.04 $29,569,924.38 $18,392,154.64 $64,652,529.64 $53,254,623.57 $64,893,655.21 $53,503,507.54 $65,150,926 57 $53,769,451.00 $81,113,252.79 $69,599,416.15 $87,175,078.68 $75,608,050.01 $105,922,625.11 $94,116,801.51 $105,334,534.28 $93,508,892.02 $104,706,138.25 $92,859,319.04 $104,034,674.66 $92,165,227.12 $110,759,824.58 $98,773,276.61 $86,512,900.93 $97,130,644.27 $113,854,792.92 $124,046,741.57 $127,145,655.91 $137,047,243.60 $123,861,102.14 $133,652,000.37 $120,351,439.22 $130,024,061.80 $114,765,109.33 $124,249,472.59 $105,427,293.62 $114,596,972.50 $95,449,504.27 8/21/00 467 Loan, 1 Keystone 4/,f( "P/zl

SCHEDULE 1-C to Facility Lease SECTION 467 LOAN Debt Service Section 467 Loan Balance f2l Interest (1) Date Principal Jan 2 2020 Jul 2 2020 Jan 2 2021 Jul 2 2021 Jan 2 2022 Jul 2 2022 Jan 2 2023 Jul 2 2023 Jan 2 2024 Jul 2 2024 Jan 2 2025 Jul 2 2025 Jan 2 2026 Jul 2 2026 Jan 2 2027 Jul 2 2027 Jan 2 2028 Jul 2 2028 Jan 2 2029 Jul 2 2029 Jan 2 2030 Jul 2 2030 Jan 2 2031 Jul 2 2031 Jan 2 2032 Jul 2 2032 Jan 2 2033 Jul 2 2033 Jan 2 2034 May 24 2034 ($5,616, 779.08) ($13,958,039.92) ($4,687,602.63) $22,465,692.05 ($6, 168,487.86) ($4,920,423.86) ($5,027,933.01) ($1,012,624.34) ($4,101,791.56) $14,317,356.90 ($3,834,988.79) $14,616,149.32 ($3,536,832.86) $20,763,127.78 ($8, 703, 150.35) $28,626,165.28 $0.00 $28,626,165.28 $0.00 $11,066,522.81 $0.00 $28,626,165.28 $0.00 $28,626,165.28 $0.00 $28,626,165.28 $0.00 $28,626,165.28 $0.00 $11,370,948.65 $3,216,648.29 $3,514,334.80 $4,103,15382 $4,399,402.32 $3,790,568.35 $4,126,188.55 $4,431,059 39 $4,749,827.43 $4,944,022.05 $5,248,865.97 $4,943,257.83 $5,239,084.74 $4,923,077.66 $5,208,176.65 $4,683,974.79 $5,135,120.91 $4,343,472.72 $4,489,847.75 $3,676,453.85 $3,800,350.34 $3,555,480.33 $3,675,300.02 $2,834,455.86 $2,929,977.02 $2,064,015.47 $2,133,572.80 $1,240,772.43 $1,282,586.46 $361,107.85 $294,474.23 ($8,833,427 37) ($17,472,374 72) ($8,790,756.45) $18,066,289.73 ($9,959,056.21) ($9,046,612.41) ($9,458,992.40) ($5, 762,451.77) ($9,045,813.61) $9,068,490.93 ($8,778,246 62) $9,377,064.58 ($8,459,910.52) $15,554,951.13 ($13,387,12514) $23,491,044.37 ($4,343,472 72) $24,136,317.53 ($3,676,453.85) $7,266,172.47 ($3,555,480.33) $24,950,865.26 ($2,834,455.86) $25,696,188.26 ($2,064,015.47) $26,492,592.48 ($1,240,772.43) $27,343,578.82 ($361,107.85) $11,076,474.42 $104,282,931.64 $121,755,306 36 $130,546,062.81 $112,479,773.08 $122,438,829.29 $131,485,441.70 $140,944,434 10 $146,706,885.86 $155,752,699.48 $146,684,208.55 $155,462,455.17 $146,085,390.59 $154,545,301.11 $138,990,349.98 $152,377,475.12 $128,886,430.75 $133,229,903.47 $109,093,585.94 $112,770,039.78 $105,503,867.31 $109,059,347.64 $84,108,482.38 $86,942,938.23 $61,246,749.97 $63,310,765.45 $36,818,172.96 $38,058,945.39 $10,715,366.57 $11,076,474.42 $0.00 Footnotes: (1) Positive amounts reflect Lessor Section 467 Interest and negative amounts reflect Lessee Section 467 Interest (2) Positive amounts reflect Lessor Section 467 Loan Balance and negative amounts reflect Lessee Section 467 Loa"Balance. 467 Loan, 2 8/21/00 Keystone /Y1J s/z.J 'cCi.

SCHEDULE 2 to Facility Lease TERMINATION VALUES Termination Date Termination ll!.!.!!! $312,562,459.55 $315,104,723.88 $317,650,874.92 $320,200,939.28 $321,718,800.16 $314,020,033.67 $316,535,015.44 $319,053,792.02 $321,554,732.92 $324,059,373.00 $326,546,081.12 $307,389,157.10 $309,807,297.58 $312,207,426.65 $314,611,077.99 $317,018,275.74 $319,996,680.04 $311,076,680.02 $313,472,710.42 $315,872,235.65 $318,255,520.37 $320,642,213.15 $323,012,578.06 $279,501,002.27 $281,633,328.75 $283,749,261.76 $285,868,448.81 $287,990,912.24 $290,634,583.18 $282,899,421.98 $285,011,820.12 $287,127,448.79 $289,228,271.99 $291,332,246.97 $293,421,337.20 $285,669,148.58 $287,764,403.84 $289,844,715.24 $291,928,039.09 $294,014,396.09 $296,577,128.00 Sep 24 2000 Oct 24 2000 Nov 24 2000 Dec 24 2000 Jan 2 2001 Feb 2 2001 Mar 2 2001 Apr 2 2001 May 2 2001 Jun 2 2001 Jul 2 2001 Aug 2 2001 Sep 2 2001 Oct 2 2001 Nov 2 2001 Dec 2 2001 Jan 2 2002 Feb 2 2002 Mar 2 2002 Apr 2 2002 May 2 2002 Jun 2 2002 Jul 2 2002 Aug 2 2002 Sep 2 2002 Oct 2 2002 Nov 2 2002 Dec 2 2002 Jan 2 2003 Feb 2 2003 Mar 2 2003 Apr 2 2003 May 2 2003 Jun 2 2003 Jul 2 2003 Aug 2 2003 Sep 2 2003 Oct 2 2003 Nov 2 2003 Dec 2 2003 Jan 2 2004 8/18/00 <-;.:, --(_ ,y, J Termination Values , 1 Keystone Ill/

SCHEDULE 2 to Facility Lease TERMINATION VALUES Termination Date Termination Value Feb 2 2004 Mar 2 2004 Apr 2 2004 May 2 2004 Jun 2 2004 Jul 2 2004 Aug 2 2004 Sep 2 2004 Oct 2 2004 Nov 2 2004 Dec 2 2004 Jan 2 2005 Feb 2 2005 Mar 2 2005 Apr 2 2005 May 2 2005 Jun 2 2005 Jul 2 2005 Aug 2 2005 Sep 2 2005 Oct 2 2005 Nov 2 2005 Dec 2 2005 Jan 2 2006 Feb 2 2006 Mar 2 2006 Apr 2 2006 May 2 2006 Jun 2 2006 Jul 2 2006 Aug 2 2006 Sep 2 2006 Oct 2 2006 Nov 2 2006 Dec 2 2006 Jan 2 2007 Feb 2 2007 Mar 2 2007 Apr 2 2007 May 2 2007 Jun 2 2007 $288,807,081.70 $290,884,358.24 $292,964,627.22 $295,031 '158.27 $297,100,608.72 $299,156,247.69 $291,370,381.18 $293,431,730.42 $295,479,213.35 $297,529,486.41 $299,582,568.82 $302,077,536.49 $294,275,079.60 $296,319,726.17 $298,367,144.31 $300,401,941.63 $302,439,443.64 $304,464,257.48 $280,848,055.62 $282,766,278.96 $284,671,763.03 $286,579,832.54 $288,490,505.30 $290,807,747.50 $283,534,104.70 $285,437,072.86 $287,342,610.19 $289,236,631.94 $291,133,162.18 $293,018,115.76 $279,627,259.05 $281,468,993.06 $283,299,069.88 $285,131,512.62 $286,966,337.64 $289,173,199.54 $282,082,056.07 $283,909,831.51 $285,739,958.21 $287,559,668.11 $289,381,674.65 8/18/00 ...:c 1111 J/o Termination Values, 2 Keystone

SCHEDULE 2 to Facility Lease TERMINATION VALUES Termination Date Termination Value Jul 2 2007 Aug 2 2007 Sep 2 2007 Oct 2 2007 Nov 2 2007 Dec 2 2007 Jan 2 2008 Feb 2 2008 Mar 2 2008 Apr 2 2008 May 2 2008 Jun 2 2008 Jul 2 2008 Aug 2 2008 Sep 2 2008 Oct 2 2008 Nov 2 2008 Dec 2 2008 Jan 2 2009 Feb 2 2009 Mar 2 2009 Apr 2 2009 May 2 2009 Jun 2 2009 Jul 2 2009 Aug 2 2009 Sep 2 2009 Oct 2 2009 Nov 2 2009 Dec 2 2009 Jan 2 2010 Feb 2 2010 Mar 2 2010 Apr 2 2010 May 2 2010 Jun 2 2010 Jul 2 2010 Aug 2 2010 Sep 2 2010 Oct 2 2010 Nov 2 2010 $291'193,209.41 $265,095,303.76 $266,766,238.72 $268,426,661.81 $270,089,285.81 $271,754,125.97 $273,756,285.50 $267,366,736.05 $269,025,357.89 $270,686,169.53 $272,336,825.67 $273,989,617.75 $275,632,200.10 $269,230,867.20 $270,877,626.66 $272,514,135.99 $274,152,685.96 $275,793,290.78 $277,759,943.76 $271,346,259.82 $272,980,585.54 $274,616,938.35 $276,243,011.15 $277,871,055.28 $279,488,763.25 $273,062,389.47 $274,683,940.43 $276,295,111.79 $277' 908,154.24 $279,523,080.85 $281,462,854.95 $275,023,187.57 $276,631,356.02 $278,241,376.60 $279,840,982.99 $281,442,383.71 $283,033,312.05 $276,579,979.59 $278, 174,391.64 $279,758,284.61 $281,343,866.34 8/18/00 Termination Values , 3 Keystone

SCHEDULE 2 to Facility Lease TERMINATION VALUES Termination Date Termination Value $282,931,148.68 $284,841,994.43 $278,374,354.31 $279,954,363.13 $281,536,035.96 $283,107,237.11 $284,680,042.89 $286,242,317.22 $272,260,217 01 $273,768,301.48 $275,265,804.92 $276,764,802.89 $278,265,305.99 $280,085,718.71 $273,874,775.27 $275,367,544.31 $276,861,777.58 $278,346,218.47 $279,832,067.58 $281,308,067.94 $275,083,161'19 $276,561,874.15 $278,030,690.94 $279,500,811.50 $280,972,245.15 $282,740,319.66 $276,500,805.34 $277,964,813.74 $279,430,095.36 $280,885,847.81 $282,342,818 09 $283,790,203.44 $248,141,955.83 $249,367,136.92 $250,582,685.06 $251'799,346.56 $253,017,129.55 $254,519,423.01 $249,373,546.05 $250,583,783.11 $251,795,099.91 Dec 2 2010 Jan 22011 Feb 22011 Mar 2 2011 Apr 2 2011 May 2 2011 Jun 2 2011 Jul 2 2011 Aug 2 2011 Sep 2 2011 Oct 2 2011 Nov 2 2011 Dec 2 2011 Jan 2 2012 Feb 2 2012 Mar 2 2012 Apr22012 May 2 2012 Jun 2 2012 Jul 2 2012 Aug 2 2012 Sep22012 Oct22012 Nov22012 Dec22012 Jan 2 2013 Feb 2 2013 Mar 2 2013 Apr 2 2013 May 2 2013 Jun 2 2013 Jul 2 2013 Aug 2 2013 Sep 2 2013 Oct 2 2013 Nov 2 2013 Dec22013 Jan 2 2014 Feb 2 2014 Mar 2 2014 Apr 2 2014 8/18/00 Termination Values, 4 Keystone

SCHEDULE 2 to Facility Lease TERMINATION VALUES Termination Date Termination Value May 2 2014 Jun 2 2014 Jul 2 2014 Aug22014 Sep 2 2014 Oct 2 2014 Nov 2 2014 Dec 2 2014 Jan 2 2015 Feb 2 2015 Mar 2 2015 Apr 2 2015 May 2 2015 Jun 2 2015 Jul 2 2015 Aug 2 2015 Sep 2 2015 Oct22015 Nov 2 2015 Dec 2 2015 Jan 2 2016 Feb 2 2016 Mar 2 2016 Apr 2 2016 May 2 2016 Jun 2 2016 Jul 2 2016 Aug 2 2016 Sep22016 Oct 2 2016 Nov 2 2016 Dec 2 2016 Jan 2 2017 Feb 2 2017 Mar 2 2017 Apr22017 May 2 2017 Jun 2 2017 Jul 2 2017 Aug 2 2017 Sep 2 2017 $252,997,381.86 $254,200,690.34 $255,394,910.41 $234,127,107.47 $235,200,236.14 $236,264,229.40 $237,329,147.96 $238,394,998.73 $239,727,108.36 $235,167,873.80 $236,226,301.98 $237,285,620.49 $238,336,126.01 $239,387,469.02 $240,429,945.88 $235,856,427.61 $236,900,478.37 $237,935,615.14 $238,971,487.73 $240,008,101.82 $241,299,970.31 $236,711,529.32 $237,740,559.53 $238,770,287.29 $239,791,251.76 $240,812,860.13 $241,825,651.23 $237,222,252.82 $238,236,227.82 $239,241,335.66 $240,246,982.87 $241,253,173.89 $242,508,033.36 $237,889,015.49 $238,887,269.03 $239,886,019.04 $240,877,825.85 $241,870,086.77 $242,855,361.83 $238,224,268.98 $239,210,370.03 8/18/00 Termination Values , 5 Keystone J(.{_

SCHEDULE 2 to Facility Lease TERMINATION VALUES Termination Date Termination Value Oct22017 Nov 2 2017 Dec22017 Jan 2 2018 Feb 2 2018 Mar 2 2018 Apr22018 May 22018 Jun 2 2018 Jul 2 2018 Aug 2 2018 Sep 2 2018 Oct 2 2018 Nov22018 Dec 2 2018 Jan 2 2019 Feb 2 2019 Mar 2 2019 Apr 2 2019 May 2 2019 Jun 2 2019 Jul 2 2019 Aug 2 2019 Sep 2 2019 Oct 2 2019 Nov 2 2019 Dec 22019 Jan 2 2020 Feb 2 2020 Mar 2 2020 Apr 2 2020 May 2 2020 Jun 2 2020 Jul 2 2020 Aug 2 2020 Sep 2 2020 Oct 2 2020 Nov 2 2020 Dec 2 2020 Jan 2 2021 Feb 2 2021 $240,189,445.71 $241'168,892.79 $242,148,714.68 $243,324,025.07 $238,680,333.17 $239,653,754.42 $240,627,512.93 $241,597,821.56 $242,568,448.05 $243,535,605.17 $238,886,281.43 $239,854,038.00 $240,818,308.48 $241,782,860.41 $242,747,696.68 $243,812,168.42 $239,156,986.97 $240,118,851.83 $241,080,986.77 $242,040,227.62 $242,999,722.76 $243,958,997.87 $239,301,750.58 $240,261,541.89 $241,221,595.60 $242,181,914.62 $243,142,501.88 $244,189,539.37 $239,533,893.02 $240,495,303.01 $241,456,993.35 $242.418,967.15 $243,381,227.55 $244,343,857.17 $202.424,320.34 $203,089,284.96 $203,759,100.88 $204,429,250.71 $205,099,738.04 $205,775,118.23 $201,754,011.44 8/18100 Termination Values, 6 Keystone : L

SCHEDULE 2 to Facility Lease TERMINATION VALUES Termination Date Termination Value Mar 2 2021 Apr 2 2021 May 2 2021 Jun 2 2021 Jul 2 2021 Aug 2 2021 Sep 2 2021 Oct 2 2021 Nov 2 2021 Dec 2 2021 Jan 2 2022 Feb 2 2022 Mar 2 2022 Apr 2 2022 May 2 2022 Jun 2 2022 Jul 2 2022 Aug 2 2022 Sep 2 2022 Oct 2 2022 Nov 2 2022 Dec 2 2022 Jan 2 2023 Feb 2 2023 Mar 2 2023 Apr 2 2023 May 2 2023 Jun 2 2023 Jul 2 2023 Aug 2 2023 Sep 2 2023 Oct 2 2023 Nov 2 2023 Dec 2 2023 Jan 2 2024 Feb 2 2024 Mar 2 2024 Apr 2 2024 May 2 2024 Jun 2 2024 Jul 2 2024 $202.420,823.79 $203,087,956.16 $203.767,803.01 $204.448,061.59 $205,141,127.01 $199,649,102.09 $200,317,888.57 $200,999.407.88 $201,681,357.46 $202,363,741.72 $203,058,956.04 $197,561,002 55 $198,231,898.22 $198,903,159.18 $199,588,115.01 $200,273,535.24 $200,972,750.14 $167,879.406.10 $168,333,037.22 $168,800,384.14 $169,268,216.63 $169,736,539.68 $170,218,683.85 $165,646,377.18 $166,102.415.93 $166,558,871.68 $167,030.415.63 $167,502.485.98 $167,989.754.73 $138,612,554.80 $138,874,585.12 $139,151.727 56 $139.429.420.56 $139,707,669.79 $140,001,147.60 $136,163,663.90 $136.428.442.54 $136,693,697.18 $136,975,249.69 $137,257,396.77 $137,555,961.14 8/18/00 Termination Values , 7 Keystone

SCHEDULE 2 to Facility Lease TERMINATION VALUES Termination Date Termination ll!!Y.! $123,433,689.75 $123,620,729.72 $123,824,094.86 $124,028,082.14 $124,232,698.01 $124,453,765.58 $120,808,416.57 $120,998,593.75 $121,189,314.27 $121,397,384.81 $121,606,125.49 $121,832,343.89 $107,934,607.77 $108,047,461.77 $108,177,696.93 $108,308,633.72 $108,440,279.41 $108,589,442.04 $105,168,430.87 $105,284,865.99 $105,401,921.34 $105,537,505.43 $105,673,845.77 $105,828,851.85 $98,061,208.42 $98,157,505.60 $98,272,616.47 $98,388,770.64 $98,505,978.07 $98,642,150.49 $90,002,142.74 $90,065,985.56 $90,130,536.38 $90,195,803.04 $90,261,793.50 $90,346,352.73 $90,431,773.63 $90,518,065.23 $90,623,905.50 $90,730,762.25 $90,838,645.68 Aug 2 2024 Sep 2 2024 Oct 2 2024 Nov 2 2024 Dec 2 2024 Jan 2 2025 Feb 2 2025 Mar 2 2025 Apr 2 2025 May 2 2025 Jun 2 2025 Jul 2 2025 Aug 2 2025 Sep 2 2025 Oct 2 2025 Nov 2 2025 Dec 2 2025 Jan 2 2026 Feb 2 2026 Mar 2 2026 Apr 2 2026 May 2 2026 Jun 2 2026 Jul 2 2026 Aug 2 2026 Sep 2 2026 Oct 2 2026 Nov 2 2026 Dec 2 2026 Jan 2 2027 Feb 2 2027 Mar 2 2027 Apr 2 2027 May 2 2027 Jun 2 2027 Jul 2 2027 Aug 2 2027 Sep 2 2027 Oct 2 2027 Nov 2 2027 Dec 2 2027 8118100 .•cc "?) f/11 Termination Values , 8 Keystone

SCHEDULE 2 to Facility Lease TERMINATION VALUES Termination Date Termination Value Jan 2 2028 Feb 2 2028 Mar 2 2028 Apr 2 2028 May 2 2028 Jun 2 2028 Jul 2 2028 Aug 2 2028 Sep 2 2028 Oct 2 2028 Nov 2 2028 Dec 2 2028 Jan 2 2029 Feb 2 2029 Mar 2 2029 Apr 2 2029 May 2 2029 Jun 2 2029 Jul 2 2029 Aug 2 2029 Sep 2 2029 Oct 2 2029 Nov 2 2029 Dec 2 2029 Jan 2 2030 Feb 2 2030 Mar 2 2030 Apr 2 2030 May 2 2030 Jun 2 2030 Jul 2 2030 Aug 2 2030 Sep 2 2030 Oct 2 2030 Nov 2 2030 Dec 2 2030 Jan 2 2031 Feb 2 2031 Mar 2 2031 Apr 2 2031 May 2 2031 $90,966,234.93 $91'094, 998 99 $91,224,949.25 $91,356,097.22 $91,508,415.55 $91,662,091.18 $91,837,097.95 $92,013,623.94 $92,191,683.14 $92,391,250.69 $92,592,516.03 $92,795,49447 $93,020,162.50 $93,246,710.93 $93,475,15643 $93,705,515.84 $93,958,569.36 $94,213,712.66 $94,491,727.23 $77,023,263.70 $77,115,439.83 $77,229,387.31 $77,344,495.72 $77,460,777.24 $77,599,007.39 $77,738,577.09 $77,879,499.88 $78,021,78945 $78,187,053.80 $78,353,860.09 $78,543,817.62 $78,735,494.84 $78,928,908.20 $79,145,66848 $79,364,345.62 $79,584,957.55 $79,829,116.59 $80,075,394.21 $80,323,809.88 $80,574,383.26 $80,850,222.77 8/18/00 ',(..::.. /"'J. ?/2! Termination Values, 9 Keystone

SCHEDULE 2 to Facility Lease TERMINATION VALUES Termination Date Termination Value Jun 2 2031 Jul 2 2031 Aug 2 2031 Sep 2 2031 Oct 2 2031 Nov 2 2031 Dec 2 2031 Jan 2 2032 Feb 2 2032 Mar 2 2032 Apr 2 2032 May 2 2032 Jun 2 2032 Jul 2 2032 Aug 2 2032 Sep 2 2032 Oct 2 2032 Nov 2 2032 Dec 2 2032 Jan 2 2033 Feb 2 2033 Mar 2 2033 Apr 2 2033 May 2 2033 Jun 2 2033 Jul 2 2033 Aug 2 2033 Sep 2 2033 Oct 2 2033 Nov 2 2033 Dec 2 2033 Jan 2 2034 Feb 2 2034 Mar 2 2034 Apr 2 2034 May 2 2034 May 24 2034 $81,128,417.46 $81,432,077.22 $81,738,292.58 $82,047,086.34 $82,381,570.08 $82,718,836.05 $83,058,908 77 $83,424,901.56 $83,793,908.43 $84,165,955.67 $84,541,069.82 $84,943,963.00 $85,350,145.38 $85,784,330.72 $86,222,030.88 $86,663,275.93 $87,132,781.61 $87,606,061.70 $88,083,148.29 $88,588,759.08 $89,098,409.88 $89,612,134.80 $90,129,968.25 $90,678,336.49 $91,231,063.13 $91,814,576.30 $92,402,701.47 $92,995,477.10 $93,619,333.53 $94,248,098.49 $94,881,812.68 $95,546,908.72 $96,217,216.64 $96,892,779.46 $97,573,640.58 $98,352,787.67 $98,475,000.00 8/18/00 Termination Values, 10 Keystone ·· <.: ( ;"1/; t/zf

EXHIBIT A Keystone DESCRIPTION OF THE FACILITY SITE PLANT: ALL that certain piece, parcel or tract of land situate in Plumcreek and ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇; and ▇▇▇▇▇▇▇▇▇ Township, Indiana County of the Commonwealth of Pennsylvania and described in accordance with a survey prepared by ▇.▇. ▇▇▇▇▇▇▇ & Associates, Inc. dated 5/99, as revised, drawing number OC2-ll-l, being bounded and described as follows: BEGINNING at a point on the Northern line of the herein described tract, said point also being in the center line of S.R. 0210 and common to lands of ▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇; thence by the center line of S.R. 0210, South 22° 0 I' 51" West, 171.31 feet to a point at the ▇▇▇▇▇ of lands of ▇▇▇▇▇▇▇ ▇▇▇▇▇ & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇▇; thence by lands of ▇▇▇▇▇▇▇ ▇▇▇▇▇ & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇▇, and lands of C. ▇▇▇▇▇▇ & ▇▇▇ ▇. ▇▇▇▇▇, South 89° 56' 38" East, passing thru an iron pin at 35.00 feet; a total distance of 1,619.85 feet to a point; thence continuing along lands of ▇▇▇▇▇, and also by lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇, North 10° 34' 35" East, 1,707.28 feet to an iron pin; thence by lands of Josephas B., Jr. and ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, South 67° 12' 37" East, 1,335.11 feet to an iron pin at the ▇▇▇▇▇ common to said lands of ▇▇▇▇▇▇, and lands of ▇▇▇▇▇ ▇. & ▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇ and lands of ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇; thence by said lands of ▇▇▇▇▇▇▇▇, and also lands of ▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ passing thru concrete monument #26C, said monument being distant 5.28 feet from the last mentioned iron pin, South I 0° 44' 34" East, 1,179.61 feet to a concrete monument #27A; thence continuing by said lands of ▇▇▇▇▇▇▇, North 89° 45' 18" East, 237.09 feet to concrete monument #28 on lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇; thence along said Kimmel lands the following 2 courses, (!) South 09° 22' 10" East, thru two concrete monuments #29 and 30, 1,490.86 feet to concrete monument #31; (2) South 88° 12' 19" East, passing thru concrete monument #32, at 615.76 feet, crossing over ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇, and passing thru an iron pin at 1,372.33 feet, a total distance of 1,422.33 feet to a point in the middle of Plum Creek; thence threading down Plum Creek by lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ & ▇▇▇▇▇ ▇▇▇▇▇▇ the following 24 courses: (I) South 09° 57' 59" East, 145.73 feet; (2) South 01° 12' 08" West, 110.00 feet; (3) South 21° 49' 38" West, 240.00 feet; (4) South 18° 14' 03" West, 180.00 feet; (5) South 06° 27' 22" West, 150.00 feet; (6) South 11° 00' 57" West, 180.00 feet (7) South 21° 25' 38" West, 350.00 feet; (8) South 01° 46' 31" West, 150.00 feet; (9) South 29° 05' 59" East, 240.00 feet; (10) South 01° 26' 18" East, 120.00 feet; (II) South 45° 26' 41" West, 120.00 feet; (12) South 61° 50' 31" West, 345.00 feet (13) South 47° 55' 58" West, 330.00 feet; (14) South 26° 07' 39" West, 130.00 feet; (15) South 05° 17' 48" East, 168.00 feet; (16) South 31° 55' 17" East, 160.00 feet; (17) South 60° 47' 48" East, 260.00 feet; (18) South 39° 23' 14" East, 160.00 feet; (19) South 02° 48' 31" East, 150.00 feet; (20) South 35° 54' 24" West, 160.00 feet; (21) South 70° 52' 04" West, 150.00 feet; (22) South 86° 13' 01" West, 210.00 feet (23) South 62° 30' 21" West, 120.00 feet; (24) South 35° 52' 37" West, 260.00 feet to a point at the confluence of Plum Creek and Crooked Creek; thence threading up Crooked Creek, HOU03:709856.3

continuing by said lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇, and also lands of ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, lands of ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇, lands of ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, and also lands of ▇▇▇▇▇▇ ▇▇▇▇▇▇ the following 47 courses: (l) North 74° 26' 02" East, 250.00 feet; (2) North 85° 55' 37" East, 390.00 feet; (3) South 81° 45' 16" East, 590.00 feet; (4) North 74° 27' 23" East, 210.00 feet; (5) South 84° 26' 07" East, 300.00 feet; (6) North 72° 45' 03" East, 190.00 feet; (7) North 21° 12' 56" East, 120.00 feet; (8) North 02° 32' 54" East, 165.00; (9) North 06° 15' 24" East, 148.50 feet; (10) North 23° 58' II" East, 247.50 feet; (II) North 52° 48' 10" East, 214.50 feet; (12) North 85° 24' 23" East, 320.00 feet; (13) North 81° 35' 24" East, 285.00 feet; (14) South 61° II' 16" East, 145.00 feet; (15) South 27° 48' 59" East, 240.00 feet; (16) South 31° 31' 40" East, 270.00 feet; (17) South 05° 04' 53" West, 150.00 feet; (18) South 39° 30' 46" West, 360.00 feet; (19) South 11° 43' 17'' West, 140.00 feet; (20) South 25° 56' 44" East, a distance of 140.00 feet; (21) South 45° 27' 42" East, 240.00 feet; (22) South 17° 43' 09" East, 115.00 feet; (23) South 31° 54' 42" West, 140.00 feet; (24) South 69° 15' 30" West, 185.00 feet; (25) South 50° 32' 54" West, 320.00 feet; (26) South 17° 56' 38" West, 170.00 feet; (27) South 10° 37' 18" East, 240.00 feet; (28) South 38° 53' 15" East, 135.00 feet; (29) North 70° 34' 59" East, 280.00 feet; (30) South 50° 29' 00" East, 205.00 feet; (31) South 17° 29' 37" East, 210.00 feet; (32) South 39° 37' 56" East, 130.00 feet; (33) South 62° 33' 06" East, 150.00 feet; (34) South 33° 43' 35" East, 80.00 feet; (35) South 00° 55' 42" West, 160.00 feet; (36) South 14° 50' 22" East, 100.00 feet; (37) South 39° II' 32" East, 100.00 feet; (38) South 70° 26' 53" East, 130.00 feet; (39) North 54° 14' 17'' East, 210.00 feet; (40) North 77° 34' 18" East, 140.00 feet; (41) South 85° 29' 44" East, 170.00 feet; (42) South 74° 33' 30" East, 120.00 feet; (43) South 41° 15' 09" East, 130.00 feet; (44) South 04° 21' 54" East, 130.00 feet; (45) South 26° 03' 51" East, 230.00 feet; (46) South 57° 14' 54" East, 150.00 feet; (47) North 87° 46' 20" East, 205.00 feet to a point on line of lands of ▇▇▇▇▇▇ ▇▇▇▇▇▇; thence by said lands, South 18° 21' 19" West, 81.60 feet to an iron pin (set) on the Northerly line of a 30 foot right of way for a private railroad spur; thence. along said right of way line and lands of ▇▇▇▇▇▇ ▇▇▇▇▇▇, North 88° 08' 50" West, 474.96 feet to a spiral to tangent point; thence by a spiral curve to the right, the chord of which bears spiral to tangent, North 87° 08' 50" West, 149.22 feet to a curve to spiral point; thence by the arc of a circle curving to the right having a radius of 1,417.69 feet the chord of which bears North 66° 20' 05" West, 914.35 feet, an arc distance of 930.99 feet to an iron pin (set); thence still along said lands of ▇▇▇▇▇▇ ▇▇▇▇▇▇ and crossing the said railroad right of way, South 38° 57' 54" West, 239.07 feet to an iron pin (set) on lands of ▇▇▇▇▇ ▇▇▇▇▇▇; thence by said lands of ▇▇▇▇▇ ▇▇▇▇▇▇ the following 19 courses: (I) North 56° 24' 45" West, 1,077.12 feet to an iron pin (set); (2) North 51° 59' 50" East, 448.51 feet to an iron pin (set); (3) North 40° 18' 01" West, 189.44 feet; (4) North 38° 10' 27" West, 99.20 feet; (5) North 40° 13' 15" West, 73.02 feet; (6) North 50° 25' 54" West, 32.02 feet; (7) North 39° 17' 30" West, 46.48 feet; (8) North 25° 39' 24" West, 51.43 feet; (9) North 21° 23' 06" West, 54.04 feet; (10) North 17° 09' 50" West, 50.00 feet; (11) North 09° 31' 42" West, 99.09 feet; (12) North 85° 21' 37" West, 23.05 feet; (13) North 68° 39' 04" West, 58.70 feet; (14) North 34° 18' 33" West, 52.02 feet; (15) North 40° 31' 00" West, 45.34 feet; (16) North 48° 15' 30" West, 53.53 feet; (17) North 39° 16' 34" West, 96.86 feet; (18) North 41° 32' 34" West, 196.29 feet; (19) North 46° 29' 13" West, 111.91 feet to an iron pin (set) on the Eastern line of lands of Keystone Coal Mining Corporation; thence by said lands of Keystone Coal Mining Corporation the following 4 courses: (I) North 22° 22' 24" East, 30.36 feet to an iron pin (set); (2) North 57° 02' 22" West, 387.06 feet; (3) North 74° 44' 44" West, 470.00 feet; (4) North 83° 12' 30" West, 880.00 feet to an iron pin (set); thence still by lands of Keystone Coal Mining Corporation, passing through an iron pin at the southwest corner thereof and also along lands of C.C.L. Co., HOU03:709856.3

Inc.; South 22° 26' 03" West, 3,099.81 feet to an iron pin; thence continuing by lands of C.C.L. Co., Inc.; South :l8° 52' 34" East, 440.05 feet to an iron pin on the Western line of lands of ▇▇▇▇▇▇; thence continuing along said lands of ▇▇▇▇▇▇, South 56° 55' 45" West, 62.92 feet to concrete monument #55; thence along lands of the Pennsylvania Electric Company the following 13 courses: (I) North 47° 15' 47" West, 1,072.82 feet to a point in Crooked Creek; (2) up Crooked Creek, North 15° 25' 04" East, 209.20 feet; (3) leaving Crooked Creek and passing through a concrete monument, North 44° 05' 02" West, 566.99 feet to an iron pin (set); (4) South 45° 54' 58" West, 240.00 feet to a concrete monument; (5) North 44° 05' 02" West, 270.00 feet to an iron pin (set); (6) North 89° 05' 02" West, 113.14 feet to an iron pin (set); (7) South 45° 54' 58" West, 875.00 feet to an iron pin (set); (8) South 00° 54' 58" West, 113.14 feet to a concrete monument; (9) South 44° 05' 02" East, 270.00 feet to a concrete monument; (10) South 45° 54' 58" West, 240.00 feet to an iron pin (set); (II) South 44° 05' 02" East, 1,001.29 feet to a point in Crooked Creek; (12) up Crooked Creek, North 87° 03' 34" East, 252.69 feet; (13) leaving Crooked Creek, South 47° 14' 02" East, 663.67 feet to a concrete monument on line of lands of ▇▇▇▇▇▇; thence by said ▇▇▇▇▇▇ lands, South 82° 56' 25" West, 505)9 feet to a concrete monument on lands of ▇▇▇▇▇▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇; thence along said lands of Kimmel the following 6 courses: (1) North 79° 25' 13" West, 225.49 feet to an iron pipe; (2) North 86° 01' 04" West, 340.54 feet to an iron pipe; (3) North 81° 09' 56" West, 265.19 feet to an iron pin (set); (4) North 85° 35' 13" West, 417.19 feet to an iron pin (set); (5) North 84° 27' 13" West, 277.36 feet to an iron pin (set); (6) North 02° 39' 13" West, 270.40 feet to a point in Crooked Creek; thence threading down Crooked Creek by said lands of Kimmel, and also by lands of ▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇, Lands of ▇▇▇▇ ▇. ▇▇▇▇, and lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇ the following 6 courses: (I) South 87° 06' 29" West, 614.58 feet; (2) North 79° 45' 07" West, 473.94 feet; (3) North 78° 41' 48" West, 269.13 feet; (4) South 89° 45' 23" West, 462.40 feet; (5) North 81° 08' 03" West, 969.77 feet; (6) North 85° 26' 42" West, 75.98 feet to a point; thence leaving Crooked Creek and continuing along said ▇▇▇▇▇ lands, South 03° 33' 33" West, 158.00 feet to an iron pin (set) on the line of lands of ▇▇▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇; thence along said ▇▇▇▇▇▇▇▇ lands the following 5 courses: (1) North 86° 26' 27" West, 300.00 feet to an iron pin (set); (2) North 03° 33' 33" East, 163.21 feet to a point in Crooked Creek; (3) threading down Crooked Creek, North 85° 26' 42" West, 473.71 feet; (4) North 87° 35' 50" West, 696.74 feet; (5) South 64° 16' 22" West, 214.22 feet to a point on line of lands of ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇; thence leaving Crooked Creek along said Seifley lands, and passing thru a concrete monument, North 51° 07' 08" West, at a distance of 104.86 feet to an iron pin (set), at a distance of 79.06 feet; thence by line of lands of ▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇ and in part generally following abandoned To▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇, ▇▇▇▇▇ ▇5° 45' 10" East, 503.25 feet to an iron pin (set); thence by same, North 02° 18' 33" West thru an iron pin (set) at a distance of 1597.57 feet, a total distance of2,135.78 feet to an iron pin (set) in S.R. 0210; thence thru and generally following S.R. 0210, along said lands of ▇▇▇▇▇▇▇ and also lands of ▇▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇, and lands of ▇▇▇▇▇▇ & ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇, North 39° 07' 33" East, 1,138.81 feet to a point on the Southern line of lands of Keystone Coal Mining Corporation; thence along said Keystone Line and portions of Ab▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇, ▇▇▇▇▇ ▇9° 21' 46" East, thru an iron pin at 75.00 feet, a total distance of 1,598.06 feet to an iron pin (set); thence continuing along said lands, and passing through a concrete monument; North 07° 45' 26" West, 436.14 feet to an iron pin (set); thence by same, North 51° 02' 37" West, 11.33 feet to an iron pin (set); thence still by same, North 01° 57' 15" East, 658.39 feet to a point on the Easterly right of way line of S.R. 0210; thence by the said right of way line the following 8 courses: (I) North 39° 04' 51" East, 20.28 feet; (2) South 50° 55' HOU03:709856.3

09" East, 50.00 feet; (3) North 39' 04' 51" East, 200.00 feet; (4) North 50' 55' 09" West, 20.00 feet; (5) North 39° 04' 51" East, 350.00 feet; (6) North 50° 55' 09" West, 20.00 feet; (7) North 39° 04' 51" East, 11.79 feet; (8) by an arc of a circle curving to the left having a radius of 2,954.93 feet, the chord of which bears North 38° 23' 37" East, 70.86 feet, an arc distance of 70.86 feet to a point on the line of lands of R & P Coal Company; thence along said lands the following 7 courses:(!) South 87° 41' 00" East, 98.85 feet to an iron pin (set); (2) North 20° 34' 00" East, 264.00 feet to concrete monument #17; (3) North !5° 52' 27" East, 308.00 feet to an iron pin (set) on the easterly side of and within the right-of-way of SR 0210 aforementioned; (4) crossing S.R. 0210 North 63° 05' 44" West, 301.60 feet to concrete monument #19; (5) North 05° 16' 50" West, 1,141.05 feet to concrete monument #20; (6) North 05° 32' 34" West, 1,232.40 feet to a disturbed iron pin; (7) North 88° 08' 43" West, 440.00 feet to an iron pin; thence continuing along lands ofR & P Coal Company and also lands of ▇▇▇▇ ▇. & ▇▇▇▇ ▇. ▇▇▇▇▇▇▇, North 32° 25' 57" East, I ,082.44 feet to an iron pin; thence continuing along said ▇▇▇▇▇▇▇ lands, South 56° 28' 30" East, 966.79 feet to a railroad spike (set) in a gravel driveway; thence by the same, South 67° 10' 36" East, 341.00 feet to a point in said gravel driveway at line ofland ofDale L. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇; thence continuing along lands of ▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ and thru said driveway, South 67° 44' 36" East passing thru an iron pin at 268.32 feet, a total distance of 293.32 feet to a point, the place of beginning. CONTAINING I ,464.283 acres after deduction of the area contained within the following three parcels which lie wholly within the boundaries of the above described tract. EXCEPTING AND RESERVING THEREFROM the following three (3) parcels: Lands of ▇▇▇▇▇ ▇. and ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, situate in Plumcreek Township, ▇▇▇▇▇▇▇▇▇ !.) County, Pennsylvania, of record in Deed Book Volume 942, Page 169, and more particularly bounded and described as follows: BEGINNING at Concrete Monument #20, said point being situate on the westerly line of the previously-described l,464.283 acre tract where same adjoins lands now or formerly of R & P Coal Company; thence, thru the previously-described I ,464.283 acre tract, by a line connecting concrete monument #20 and concrete monument #21, South 80° 21' 45" East, 581.88 feet to a point, said point being the southwest ▇▇▇▇▇ of the herein-described tract, said point being also the TRUE PLACE OF BEGINNING; thence from said TRUE PLACE OF BEGINNING, by a line thru the previously-described 1,464.283 acre tract, North 22° 07' 51" East, 208.92 feet to a point, said point being the northwest ▇▇▇▇▇ of the herein-described tract; thence thru the same, South 80° 21' 45" East, 211.06 feet to a point on the westerly right-of-way line of S.R. 0210, said point being the northeast corner of the herein-described tract; thence by the westerly right-of­ way line of said St▇▇▇ ▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇ ▇2° 07' 51" West, 208.92 feet to a point where said right-of-way line is intersected by said line connecting concrete monuments #20 and 21, which point is located North 80' 21' 45" West, 59.56 feet from concrete monument #21; thence by said line and thru previously-described 1,464.283 acre tract, North 80° 21' 45" West, 211.06 feet to a point, and said point being the TRUE PLACE OF BEGINNING. Containing 0.988 Acres. HOU03:709856.3

2.) Lands of ▇▇▇▇▇▇▇ ▇. and ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, situate in Plumcreek Township, ▇▇▇▇▇▇▇▇▇ County, Pennsylvania, of record in Deed Book Volume 550, Page 852, and Deed Book Volume 552, Page 572, and more particularly bounded and described as follows: BEGINNING at concrete monument #19, said point being situate on the westerly line of the previously-described tract where same adjoins lands now or formerly of R & P Coal Company; thence along the dividing line between lands of R & P Coal Company and the previously described I ,464.283 acre tract, crossing S.R. 0210, South 63° 05' 44" East, 301.60 feet to a point on the Easterly side of and within the right-of-way of S.R. 0210 aforementioned; thence by a tie line thru the previously described 1,464.283 acre tract, North 85° 54' 37" East, 704.97 feet to a point on concrete monument #67, said point being the southeast ▇▇▇▇▇ of the herein-described tract, said point being also the TRUE PLACE OF BEGINNING; thence, from said TRUE PLACE OF BEGINNING, and thru the previously described I ,464.283 acre tract, North 67° 37' 58" West, 665.00 feet thru concrete monument #62 to a point in S.R. 0210, said point being the southwest corner of the herein-described tract; thence thru and along State Route 0210, North 22° 22' 02" East, 400.00 feet to a point, said point being the northwest ▇▇▇▇▇ of the herein-described tract; thence thru the previously-described 1,464.283 acre tract, South 67° 37' 58" East, 435.60 feet thru concrete monument #63 to a point on concrete monument #64; thence by the same, South 22° 22' 02" West, I 00 feet to a point; thence thru the same, South 67° 37' 58" East, 229.40 feet to a point on concrete monument #66; thence still thru the same, South 22° 22' 02 West, 300.00 feet to a point on concrete monument #67, said point being the TRUE PLACE OF BEGINNING. Containing 5.58 Acres. 3.) Lands of ▇▇▇▇▇ ▇. Hogolsky, situate in Plumcreek Township, ▇▇▇▇▇▇▇▇▇ County, Pennsylvania, of record in Deed Book Volumel318; Page 222, and more particularly bounded and described as follows: BEGINNING at a point on concrete monument #64, said point being the northeast ▇▇▇▇▇ oflands of ▇▇▇▇▇▇▇ ▇. and ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, of record in Deed Book Volume 550, Page 852, and Deed Book Volume 552, Page 572, said parcel being indicated as "2" above; thence by a tie line thru the previously-described 1,464.283 acre tract, North 22° 22' 02" East, 300.00 feet to a point on concrete monument #71, said point being the southeast ▇▇▇▇▇ of tbe herein-described tract, and said point being also the TRUE PLACE OF BEGINNING; thence, from said TRUE PLACE OF BEGINNING, and thru the previously-described 1,464.283 acre tract, North 67° 37' 58" West, 435.60 feet thru concrete monument #68 to a point in S.R. 0210, said point being the southwest ▇▇▇▇▇ of the herein-described tract; thence thru and along said State Route 0210, North 22° 22' 02" East, 100.00 feet to a point, said point being the northeast ▇▇▇▇▇ of the herein­ described tract; thence thru the previously-described 1,464.283 acre tract; South 67° 37' 58" East, 435.60 feet thru concrete monument #69 to a point on concrete monument #70, said point being the northeast ▇▇▇▇▇ of the herein-described tract; thence thru the same, South 22° 22' 02" West, 100.00 feet to a point on concrete monument #71, said point being the TRUE PLACE OF BEGINNING. Containing 1.00 Acre. LAKE: ALL that certain piece, parcel or tract of land situate in Cowanshannock and Plumcreek Townships, ▇▇▇▇▇▇▇▇▇ County in the Commonwealth of Pennsylvania and described in HOU03 709856.3

accordance with a survey prepared by ▇.▇. ▇▇▇▇▇▇▇ & Associates, Inc. dated 5/99, as revised, drawing number OC2-II-I, being bounded and described as follows: BEGINNING at a point on the western line of the herein described tract, said point also being in the center line of S.R. 2001 and common to the northwest corner of lands of ▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇; thence along and thru S.R. 200 I and along lands of ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ the following 5 courses: (!)North !5° 48' 39" East, 545.36 feet to a point; (2) North 13° 29' 49" East, 652.41 feet; (3) North 21° 15' 09" East, 383.92 feet; (4) North 16° 50' 49" East, 680.97 feet (5) North 38° 04' 33" East, 372.68 feet a point on the line of lands of ▇▇▇▇ ▇., Jr. and ▇▇▇▇▇ ▇. ▇▇▇▇▇▇ which point is 8.70 feet northwest of concrete monument #28; thence along said ▇▇▇▇▇▇ lands and passing through concrete monument #28, South 59° 23' 53" East, 180.30 feet to concrete monument #29; thence continuing along the same, North 16° 16' 34" East, 868.93 feet to concrete monument #30; thence still along ▇▇▇▇▇▇ lands and passing thru concrete monument #31, North 88° 37' 29" West, 279.94 feet to a point on S.R. 2001, which point is 13.04' west of concrete monument #31; thence along and thru S.R. 200 I and by said lands of ▇▇▇▇▇▇ the following 2 courses: (I) North 02° 51' 55" East, 491.92 feet; (2) North 06" 21' 20" West, 221.25 feet to a point on the Southern line oflands of ▇▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, which point is 22.27 feet west of concrete monument #33; thence along said ▇▇▇▇▇▇▇ lands and passing thru concrete monument #33, South 89° 42' 26" East, 911.71 feet to concrete monument #34; thence along the same, North 06° 36' 07" East, 690.88 feet to a 30" ▇▇▇ ▇▇▇▇; thence still by the same and also by lands of ▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇; and lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ passing thru concrete monument #35 at a distance of 16.21 feet, North 06° 57' 46" West, a total distance of 650.52 feet to concrete monument #36; thence continuing along said ▇▇▇▇▇▇▇ lands the following 4 courses: (I) North 28° 22' 05" East, 368.21 feet to an iron pin (set); (2) North 76° 42' 38" West, 420.00 feet to concrete monument #38; (3) South 38° 24' 04" West, 178.70 feet to concrete monument #39; (4) South 89° 32' 28" West, 164.45 feet to concrete monument #40; thence by the northerly line of the aforementioned lands of ▇▇▇▇▇, North 79° 23' 57" West, 264.28 feet to a point at the southeast corner of lands of ▇▇▇▇▇▇▇ and ▇▇▇▇▇ ▇▇▇▇▇▇; thence along said ▇▇▇▇▇▇ lands passing through concrete monument #41 at a distance of 22.0 I feet, also passing 0.23 feet east of concrete monument #42 at a distance of 772.16 feet, North 01° 08' 52" East, a total distance of 1,491.40 feet to concrete monument #43; thence by the same, North 89° 48' 50" West, 161.61 feet to concrete monument #44; thence by lands of W. ▇▇▇▇ ▇▇▇▇▇▇▇, and passing 0.50 feet east of concrete monument #45 at a distance of 723.59 feet, North 00° 05' 03" West, a total distance of 1,447.30 feet to concrete monument #46; thence by the same, South 89° 18' 21" West, 72.61 feet to concrete monument #47; thence by the same and also along and through S.R. 2001 the following 2 courses: (I) North 05° 19' 05" East, 647.49 feet; (2) North 09° 58' 41" West, 907.50 feet to a point on line of lands of ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇; thence along said ▇▇▇▇▇▇▇▇ lands and passing through concrete monument #49 at a distance of 22.63 feet, South 87° 56' 01" East, a total distance of 873.94 feet to concrete monument #50; thence along the same and also lands of ▇▇▇▇▇ ▇. & ▇▇▇▇ ▇. ▇▇▇▇▇, passing 0.13 feet east of concrete monument #51 at a distance of 936.75 feet, and passing through concrete monument #52 at a distance of 2,099.96 feet, North 00° 12' 05" West, a total distance of 3,504.20 feet to concrete monument #53; thence by lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇, and crossing over To▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇, passing 7.54 feet south of concrete monument #54 at a distance of 957.78 feet, passing 0.25 feet north of concrete monument #55 at a distance of 1,769.19 feet, passing 0.53 feet south of concrete monument #56 at a distance of 1,814.21 feet, South 88° 44' 21" East, a total distance of 1,994.27 feet, to concrete monument #57; thence by the same and crossing over Township Road HOU03 709856.3

688, passing LO1 feet east of concrete monument #58 at a distance of 615.15 feet, North 00° 41' 40" East, a total distance of 1,228.82 feet to concrete monument #59; thence still by the same, North 20° 20' 23" West, 434.51 feet to concrete monument #60 on the Southern line of lands of ▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇▇▇▇▇▇; thence along said lands of Reefer, also lands of ▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇▇▇▇▇▇, and also lands of ▇▇▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇▇▇▇, running in part along and through To▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇ ▇nd also crossing the same, passing 0.25 feet north of concrete monument #61 at a distance of 1 ,430.72 feet, South 88° 43' 17'' East, a total distance of 2,187.78 feet to concrete monument #62; thence crossing Township Road 711 and along lands of ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ and ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, passing 0.22 feet west of concrete monument #63 at a distance of 984.88 feet, South 01° 47' 54" West, a total distance of 1,851,84 feet to concrete monument #64; thence along the same, passing 27.07 feet north of concrete monument #65 at a distance of 1,266.19 feet, South 88° 51' 19" East, a total distance of2,487.29 feet to concrete monument #66; thence still by the same, North 00° 51' 16" West, 74.44 feet to concrete monument #67 on the southern line of lands of ▇▇▇▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇; thence along said lands of Cousins, and also lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, South 89° 44' 43" East, 1,'!37.04 feet to concrete monument #68 on the western line of lands of ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇; thence by the said ▇▇▇▇▇▇▇▇▇▇ lands South 02° 30' 19" East, 30L55 feet to a point in To▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇; thence along said ▇▇▇▇▇▇▇▇▇▇ lands, passing 9.31 feet south of concrete monument #69 at a distance of 21,00 feet, and passing through concrete monument #70 at a distance of 368.41 feet, South 81° 48' 27" East, a total distance of 782.25 feet to concrete monument #71; thence still along said ▇▇▇▇▇▇▇▇▇▇ lands the following 15 courses: (1) North 02° 24' 14" West, 153.27 feet; (2) North 39° 39' 56" East, 203.75 feet; (3) North 38° 11' 16" East, 245.39 feet; (4) North 55° 27' 06" East, 224.81 feet; (5) North 51° 36' 26" East, 154.05 feet; (6) North 44° 48' 26" East, 182.80 feet to concrete monument #72; (7) North 18° 36' 22" East, 340.94 feet; (8) North 07° 24' 58" West, 170.68 feet; (9) North 24° 11' 38" West, 236.23 feet; (lO) North 07° 55' 28" West, 217.46 feet to concrete monument #73; (11) North 06° 11' 41" West, 264.98 feet; (12) North 01° 08' 11" West, 241.41 feet; (13) North 10° 49' 19" East, 234.91 feet; (14) North 01° 35' 49" East, 208.03 feet to concrete monument #74; (15) North 78° 42' 55" East, 229.38 feet to a point at To▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇; thence still by the same and also along and thru To▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇, ▇▇▇▇▇ ▇9° 01' 45" West, 466.11 feet to a point; thence by lands of unknown ownership, South 78° 43' 24" East, 330.54 feet to concrete monument #77; thence by the same, North 16° 23' 01" East, 659.65 feet to a dead corner tree at lands of ▇▇▇▇ ▇. ▇▇▇▇▇▇▇; thence along lands of Pliscof, and passing thru concrete monument #78 at a distance of 12.00 feet, South 80° 52' 16" East, a total distance of 541,82 feet to concrete monument #79; thence still by the same, passing through concrete monument #80 at a distance of 685.38 feet, passing 0.94 feet east of concrete monument #81 at a distance of 1,299.39 feet, North 10° 50' 58" East, a total distance of 1,309.49 feet to an existing stone corner at the southwest corner of lands of ▇▇▇▇▇▇▇ & ▇▇▇▇ ▇▇▇ ▇▇▇▇; thence along lands of ▇▇▇▇, South 74° 45' 49" East, 944.56 feet to concrete monument #82; thence by the same, and crossing Township Road 712, passing LOS feet south of concrete monument #83 at a distance of 673.07 feet, passing 0.16 feet north of concrete monument #85 at a distance of 1,400.00 feet, South 79° 08' 45" East, a total distance of 1,774.11 feet to concrete monument #86; thence along lands of ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ and ▇▇▇▇▇▇ ▇▇▇▇▇, lands of ▇▇▇▇ & ▇▇▇▇ Mittilio, and also lands of ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇, crossing Township Road 666, passing 0.81 feet south of concrete monument #87 at a distance of 1,318.96 feet, and passing 0.47 feet south of concrete monument #89 at a distance of 2,484.32 feet, South 80° 12' 07" East, a total distance of 5,155.81 feet to concrete monument #92; thence continuing by said lands of ▇▇▇▇▇▇, North 56° 35' 00" East, 1,329.36 feet !-IOU03:709856.3

to concrete monument #93 on line of lands of ▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇; thence along said Kimmel lands and also lands of ▇▇▇▇ ▇. ▇▇▇▇▇▇, passing 0.34' North of concrete monument #94 at a distance of 611.24 feet, and crossing S.R. 0210, South 79° 35' 46" East, a total distance of 930.03 feet to concrete monument #95; thence continuing along lands of ▇▇▇▇ ▇. ▇▇▇▇▇▇ the following 2 courses: (1) North 56° 38' 02" East, 325.48 feet to concrete monument #96; (2) North 52° 10' 45" East, 990.79 feet to concrete monument #97 on the Southern line of lands of ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇ Heirs; thence by said ▇▇▇▇▇▇▇▇▇▇ lands and lands of Buffalo & Susquehanna Coal & Coke Co., passing thru an iron pipe at a distance of 676.51 feet, South 79° 43' 52" East, a total distance 806.46 feet to concrete monument #98; thence along other lands of ▇▇▇▇ ▇. ▇▇▇▇▇▇ the following 5 courses: (1) South 32° 43' 26" West, 6.52 feet to a point of curvature; (2) thence by a curve to the right having a radius of 846.36 feet, the chord of which bears South 45° 45' 46" West, 381.90 feet, an arc distance of 385.21 feet to a point of tangency; (3) South 58° 48' 06" West, 300.56 feet to a point of curvature; (4) thence by a curve to the left having a radius of 735.23 feet, the chord of which bears South 51° 49' 51" West, 178.46 feet, an arc distance of !78.90 feet to a point of tangency; (5) South 44° 51' 36" West, 365.87 feel._to concrete monument #99; thence by other lands of Buffalo & Susquehanna Coal & Coke Co. the following 9 courses: (1) South 32° 33' 48" West, 165.05 feet; (2) South 45° 32' 47" West, 164.23 feet; (3) South 47° 42' 47" West, 131.82 feet; (4) South 54° 43' 47" West, 108.66 feet; (5) South 59° 45' 47" West, 127.69 feet; (6) South 67° 59' 47" West, 163.79 feet; (7) South 75° 06' 47" West, 147.79 feet; (8) South 82° 18' 47" West, 172.94 feet; (9) South 87° 35' 47" West, 168.23 feet to a point at the Northwest ▇▇▇▇▇ of lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇ ▇▇▇▇ Windows; thence along said Windows lands, South 09° 15' 30" West, 126.75 feet to concrete monument #101; thence still along said Windows lands, crossing To▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇, passing 0.21 feet east of concrete monument #!02 at a distance of 1,836.88 feet, passing 13.82 feet east of concrete monument #103 at a distance of 2690.23 feet, and passing through concrete monument #104 at a distance of 3,879.76 feet, South 09° 31' 19" West, a total distance of 3,885.26 feet to an iron pipe at the ▇▇▇▇▇ of lands of E. Wayne & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇; thence by said lands of ▇▇▇▇▇▇, and lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇ passing 0.73 feet north of concrete monument #I 05 at a distance of 1,211.36 feet, and passing 0.67 feet north of concrete monument #106 at a distance of 2,373.30 feet, North 78° 01' 31" West, a total distance of 3,032.99 feet to a point at the Northwest ▇▇▇▇▇ of said ▇▇▇▇▇▇ lands, said point being further located South 83° 46' 18" East, 94.63 feet from concrete monument #107; thence continuing along said lands of ▇▇▇▇▇▇, South 10° 17' 51" West, 244.30 feet to the Northeast ▇▇▇▇▇ of lands of ▇▇▇▇▇▇ Auto Wrecking, Inc., said point being located South 82° 41' 19" East, 47.98 feet from concrete monument #108; thence by lands of ▇▇▇▇▇▇ Auto Wrecking, Inc., lands of ▇▇▇▇▇▇▇▇ E. & ▇▇▇▇▇ ▇▇▇▇▇▇▇, and ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇, lands of L. ▇▇▇▇ ▇▇▇▇▇▇▇▇, and lands of ▇▇▇▇▇▇ ▇. & W. ▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇ passing 0.36 feet south of concrete monument #109 at a distance of 1,289.32 feet, and crossing To▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇, ▇▇▇▇▇ ▇4° 32' 59" West, a total distance of2,483.72 feet to concrete monument #110; thence continuing by said ▇▇▇▇▇▇▇▇▇▇ lands, North 10° 39' 37" East, 94.35 feet to concrete monument #Ill; thence by the same, and also by lands of ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇, crossing of S.R. 0210, and by lands of ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, passing thru concrete monument #112 at a distance of 755.20 feet, passing thru concrete monument #113 at a distance of 1,753.06 feet, and passing 0.98 feet south of concrete monument #114 at a distance of 2,316.05 feet, North 79° 10' 05" West, a total distance of 2,817.85 feet to concrete monument #115; thence along lands of ▇▇▇▇▇▇ ▇. ▇▇▇▇▇ the following 5 courses: (1) South [0° 56' 06" West, 605.21 feet to concrete monument #116; (2) North 79° 17' 10" West, 506.08 feet to concrete monument #117; (3) South 05° 51' 21" West, HOU03:709856.3

186.04 feet to concrete monument #118; (4) South 46' 47' 23" West, 166.68 feet to existing pin monument #119; (5) South 22° 17' 49" East, 457.10 feet to concrete monument #120; thence by lands of ▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇ the following 5 courses: (I) North 78° 18' 21" West, 195.53 feet to concrete monument #121; (2) South 87° 16' 50" West, 198.01 feet to concrete monument #122; (3) South 73° 01' 01" West, 267.04 feet to concrete monument #123; (4) South 03° 32' 07" West, 748.10 feet to concrete monument #124; (5) passing 4.41 feet south of concrete monument #125 at a distance of 414.25 feet, crossing S.R 0210, passing thru concrete monument #126 at a distance of 637.32 feet, South 79' 51' 27" East, a total distance 901.70 feet to concrete monument #127 on the line of lands of ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇ & ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇; thence along said land of ▇▇▇▇▇▇▇▇, passing thru concrete monument #128 at a distance of 751.89 feet, and passing thru concrete monument #129 at a distance of 1,451.08 feet, South 10° 46' 24" West, a total distance of 2,098.13 feet to concrete monument #130 on the Northern line of lands of ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, et. a!.; thence by said lands of ▇▇▇▇▇, passing 1.14 feet North of concrete monument #131 at a distance of 568.95 feet, passing thru concrete monument #132 at a distance of 1,087.25 feet, crossing S.R. 0210, passing thru concrete monument_#133 at a distance of I,199.11 feet and passing thru concrete monument #134 at a distance of 1,777.06 feet, North 78° 57' 58" West, a total distance of 1,785.65 feet to a point; thence continuing along said lands of ▇▇▇▇▇, passing 0.59 feet east of concrete monument #135 at a distance of 774.87 feet, crossing S.R. 0210 and passing thru concrete monument #136 at a distance of 1,138.01 feet, South 00° 05' 32" East, a total distance of 1,899.33 feet to concrete monument #137; thence by the same passing thru concrete monument #138 at a distance of 511.34 feet, North 88° 53' 21" West, at total distance of 1,215.62 feet to concrete monument #139; thence still by the same and also by lands of ▇▇▇▇▇ ▇. & ▇▇▇▇ ▇▇▇▇▇▇▇▇, passing 0.73 feet east of concrete monument #140 at a distance of 462.67 feet, passing 0.18 feet West of concrete monument #141 at a distance of 915.58 feet, passing 0.38 feet west of concrete monument #142 at a distance of 1,486.90 feet, crossing ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇, passing 0.40 feet west of concrete monument #143 at a distance of 1,556.24 feet, passing 0.17 feet east of concrete monument #144 at a distance of 1,964.68 feet, and passing thru concrete monument#145 at a distance of 2,531.78 feet, South 0 I 0 07' 29" West, a total distance of 2,538.82 feet to corner tree;·thence along lands of ▇▇▇▇▇▇ & ▇▇▇ ▇▇▇▇▇▇▇, passing through concrete monument #146 at a distance of 548.99 feet, passing 19.93 feet north of concrete monument #147 at a distance of 976.89 feet, and passing through concrete monument #148 at a distance of 1,431.80 feet, North 89° 53' 23" West, a total distance of 1,439.03 feet to an iron pin; thence by lands of ▇▇▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇, passing thru concrete monument #149 at a distance of 496.35 feet, North 20° 50' 02" West, 516.35 feet to a point at ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇; thence along and thru Township Road 383 the following 3 courses: (1) South 62° 56' 52" West, 517.74 feet; (2) South 75° 18' 38" West, 215.43 feet; (3) South 59° 36' 58" West, 337.19 feet to a point in the right-of-way of S.R. 0210 at line of lands of ▇▇▇▇▇ ▇. & ▇▇▇▇▇▇▇ ▇▇▇▇▇; thence along said lands of ▇▇▇▇▇, South 41° 19' 58" East, 481.04 feet to an iron pin (set) within the right ▇▇ ▇▇▇ ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇; thence along and thru said road the following 3 courses: (I) South 23° 23' 52" West, 661.55 feet; (2) South 08' 31' 54" West, 294.94 feet; (3) South 00° 22' 02" East, 464.15 feet to a point on line of lands of ▇▇▇▇▇▇▇ Landscaping Co., Inc.; thence along said lands of ▇▇▇▇▇▇▇ the following 8 courses: (I) South 41° 59' 02" West, 503.62 feet to an iron pin; (2) South 21° 00' 22" West, 364.30 feet to an iron pin (set); (3) South 12° 48' 06" West, 647.29 feet to an iron pin (set); (4) South 01° 14' 40" East, 745.01 feet to an iron pin (set); (5) North 78° 31' 50" East, 222.56 feet to an iron pin (set); (6) South 00° 40' 40" West, 121.54 feet to an iron pin (set); (7) South 36° 49' 50" West, 348.57 feet to an iron pin (set); (8) HOU03:709856.3

South 01° 14' 40" East, 436.84 feet to a point in S.R. 2004; thence along and through said road, South 66° 54' 41" West, 501.19 feet to a point; thence continuing in part along the same, along lands of ▇▇▇▇▇▇ ▇▇▇▇▇▇ and also along lands of ▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇, passing 5.21 feet North of concrete monument #163 at a distance of 1093.00 feet, South 63° 56' 04" West, a total distance of 2,229.17 feet to concrete monument #164 within the right-of-way of S.R. 0210; thence along lands of ▇▇▇▇▇ ▇. ▇▇▇▇▇ and also lands of ▇▇▇▇▇▇ ▇▇▇▇▇▇, crossing S.R. 2004, passing through concrete monument #165 at a distance of 369.43 feet, and passing through concrete monument #166 at a distance of 1,853.69 feet, South 29° 49' 40" East, a total distance of 2,827.17 feet to a point, which point is located South 36° 41' 39" West, 1.16 feet from concrete monument #167; thence along lands of ▇▇▇▇▇▇ & ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, South 36° 41' 39" West, 908.75 feet to concrete monument #3; thence along lands ofDona1d Clair & ▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇, South 36° 46' 56" West, 114.28 feet to concrete monument #4; thence along lands of ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇ and crossing Plum Creek, North 65° 06' 54" West, passing thru an iron pin at a distance of 2119.69 feet, a total distance of 2,139.69 feet to a point in the right of way of S.R. 021 0; thence in part along and through said road and also along lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇, North 01° 35' 00" East, 1,272.11 feet to a point in Township R ad 680; thence leaving ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇ and along lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇, the following 3 courses: (!) South 88° 24' 22" East, passing thru an iron pin at 11.31 feet and an iron pin at 205.10 feet, a total distance of 220.10 feet to a point within the right of way of S.R. 0210; (2) North 01° 35' 38" East, passing thru an iron pin at a distance of 15.00 feet, a total distance of 198.00 feet to concrete monument #9; (3) passing thru concrete monument #10 at a distance of 195.03 feet, North 88° 24' 22" West, a total distance of219.93 feet to a point in ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇; thence along and thru said road, North 01° 32' 09" East, 227.79 feet to a point; thence along lands of ▇▇▇▇▇▇▇ & ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ the following 5 courses: (I) passing thru concrete monument #15 at a distance of 502.79 feet, North 09° 37' 54" West, a total distance of 511.18 feet to a point; (2) passing 0.80 feet north of concrete monument #16 at a distance of 563.55 feet, North 82° 29' 31" West, a total distance of 1,132.75 feet to a point, (3) passing thru concrete monument #17 at a distance of 4.00 feet, and passing 0.47 feet east of concrete monument #18 at a distance of 549.72 feet, North 04° 50' 27" West, a total distance of 1,065.35 feet to concrete monument #19; (4) North 85° 45' 16" West, 619.72 feet to concrete monument #20; (5) passing thru concrete monument #21 at a distance of 343.12 feet, South 07° 58' 59" West, a total distance of 1,006.61 feet to concrete monument #22 on the Northern line of lands of ▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇; thence by lands of ▇▇▇▇▇, passing thru concrete monument #23 at a distance of 694.03 feet, North 82° 32' 30" West, a total distance of707.49 feet to a point at the place of beginning. CONTAINING 3,556.310 acres after deduction of the area contained within the following two parcels which lie wholly within the boundaries of the above described tract. EXCEPTING AND RESERVING THEREFROM the following two (2) out-parcels: OUT-PARCEL 1.) Lands of ▇▇▇▇ ▇. & ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇, of Record in Deed Book Volume 1705, Page 298, situate in Plumcreek Township, ▇▇▇▇▇▇▇▇▇ County, Pennsylvania, and more particularly bounded and described as follows: BEGINNING at concrete monument #9, which monument is situate at the Northeast ▇▇▇▇▇ of lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇; thence by the Northerly line of said ▇▇▇▇▇▇▇▇ HOU03.709856.3

lands, passing thru concrete monument #10 at a distance of 195.03 feet, North 88° 24' 22" West a total distance of219.93 feet to a point in ▇▇▇▇▇▇▇▇ ▇▇▇▇ #▇▇▇; thence along and thru said road, North 01° 32' 09" East, 227.79 feet to a point; thence by a tie line thru the above described 3,556.310 acre tract North 59° 42' 29" East, 52.45 feet to an iron pin (set) THE TRUE PLACE OF BEGINNING; thence from said TRUE PLACE OF BEGINNING, by a line thru the previously described 3,556.310 acre tract, North 05° 44' 43" West, 621.75 feet to concrete monument #14 at the northwest ▇▇▇▇▇ of the parcel herein described; thence thru same, North 77° 41' 49" East, 320.01 feet to concrete monument #13; thence thru same, South 38° 12' 23" East, 454.93 feet to concrete monument #12; thence still thru the same, South 58° 13' 50" West, 625.51 feet to an iron pin (set), said point being the TRUE PLACE OF BEGINNING. Containing 5.515 acres. OUT-PARCEL 2.) Combined description of the following nine (9) individual parcels all situate in Plumcreek Township, ▇▇▇▇▇▇▇▇▇ County, Pennsylvania; lands of ▇▇▇▇▇▇ ▇., Sr., & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇▇▇, of record in Deed Book Volume 1511, Page 321; Lands ofW. ▇▇▇▇ and ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇, of record in Deed Book Volume 673, Page 059; Linds of ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇, of record in Deed Book Volume 1240, Page 148; Lands of-▇▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, of record in Deed Book Volume 727, Page 099; Lands of ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, of record in Deed Book Volume 543, Page 385; Lands of ▇▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, of record in Deed Book Volume 624, Page 593; Lands of ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, of record in Deed Book Volume 878, Page 344; lands of ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇, of record in Deed Book 542, Page 148 and lands of ▇▇▇▇▇▇, Jr. and ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, of record in Deed Book 570, Page 097. BEGINNING at concrete monument #153 thence North 89° 57' 09" East, 20.92 feet to a ▇▇▇▇▇ in Township Road 688 on the eastern line of the previously described 3,556.310 acre tract, where the same is intersected by the dividing line between lands of ▇▇▇▇▇▇ & ▇▇▇ ▇▇▇▇▇▇▇ and lands of ▇▇▇▇▇▇▇ Landscaping Co., Inc.; thence along and thru ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇, ▇▇▇▇▇ 00° 22' 02" East, 464.15 feet to a point; thence continuing along lands of ▇▇▇▇▇▇▇ Landscaping Co., Inc., South 41° 59' 02" West, 503.62 feet to an existing iron pin; thence by a tie line thru the previously described 3,556.310 acre tract, South 79° 31' 23" West, 859.56 feet to concrete monument #173 being the TRUE PLACE OF BEGINNING; thence from said TRUE PLACE OF BEGINNING, said point being the Southeast ▇▇▇▇▇ of the parcel herein described and along the Southern line of lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, lands of ▇▇▇▇▇▇ ▇. ▇▇▇▇▇ and lands of ▇▇▇▇▇▇▇ ▇. & ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, passing thru concrete monument #I 72 at a distance of 1,450.53 feet, North 88° 19' 08" West, a total distance of 1,581.51 feet to a point in the center line of S.R. 0210; thence continuing in the center line of S.R. 0210, and along the Western line of lands of ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, North 07° 15' 52" East, 152.26 feet to a point of curvature; thence continuing in the center line of S.R. 0210 along lands of ▇▇▇▇▇▇ ▇. ▇▇▇▇▇, lands of ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, and lands of ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇, by a curve to the right having a radius of I,146.28 feet, the chord of which bears, North 38° 01' 22" East, l,172.46 feet, an arc distance of 1,230.72 feet to a point of tangency; thence continuing by the center line of S.R. 0210 and along lands of ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇ and lands of ▇▇▇▇▇▇ ▇., Sr., and ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇▇▇, North 68° 46' 52" East, 489.65 feet to a point of curvature; thence by a curve to the left having a radius of 2,864.90 feet, the chord which bears, North 64° 00' 11" East, 477.29 feet, an arc distance of 477.84 feet to a point in the center line of S.R. 0210; thence continuing along lands of ▇▇▇▇▇▇▇▇▇▇▇▇, lands of ▇. ▇▇▇▇ & ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇, lands of ▇▇▇▇▇▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇▇▇ and lands of ▇▇▇▇▇▇ ▇. & ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, passing thru concrete monument #174 at a distance of 81.84 feet, HOU03:709856.3

South 01° 45' 02" West, a total distance of 1,508.19 feet to a concrete monument #173, being the TRUE PLACE OF BEGINNING. Containing 38.700 acres. HOUOJ 709856.3

Keystone EXHIBIT B TO FACILITY LEASE Description of Facility The Facility consists of the following: (i) all of the Described Property (as defined below), (ii) to the extent not included in (i) above, all improvements presently located on the land described in Exhibit A attached hereto, save and except any thereof that are Excluded Property (as defined below), (iii) to the extent not included in (i) or (ii) above, any and all other tangible property owned by Seller and presently located on the land described in Exhibit A attached hereto, save and except any thereof that is Excluded Property. The "Described Property" means the following: two coal-fired units and all components thereof, four diesel generators and all components thereof, two backup diesel generators, two aboveground fuel oil storage tanks, three underground fuel storage tanks and associated support facilities, the generators described on Schedule 1 hereto, the boilers described on Schedule 1 hereto, the turbines described on Schedule 1 hereto; buildings, fences and other structures and improvements; boiler plant equipment; accessory and miscellaneous electric equipment; fuel holders, producers and accessories. The "Excluded Property" means the following: all furniture and office equipment, including, but not limited to, cartslhandtrucks/dollies, cabinets, shelving, lockers, TV camera video view finders, safety equipment, paper shredders, televisions, computer equipment, audio/visual/photo/training equipment, data processing equipment, bookcases, chairs, daybeds or couches, files, tables, TV/video recorders/players, desks, embossing presses and tape writers, shelving, projector and screen, TV monitors/receivers, calculators, bulletin boards, conference table, camcorder, drawing racks, slide projector, wipe/erase board, blueprint machine, cameras, public address/paging system, movable partitions, stools, tackboards/chalkboards/bulletin boards, and work station modular attachments; tools and small equipment, including, but not limited to, vacuum cleaner/sweeper equipment, cranes, hoists and derricks, laboratory equipment, permanently installed machine shop equipment, machine shop portable/hand tools, air piping, valves, air compressors, pumps, radio and microwave equipment, atmospheric/weather equipment, air conditioning/heating equipment, kitchen equipment, portable gas/oil supply tanks, time code generators, miscellaneous power plant equipment, air compressors, respirators, samplers, welding or burning equipment, parts washers, battery chargers or testers, circuit breakers, torque testers, regulators, platform lifts hydraulic, trolleys, pallet lifters, megometers, tachometers, analyzers and test equipment, audio miners boards, flowmeters, snow removal equipment, oscilloscopes, indicators, turbidimeters, presses, pneumatic chippers, vibration analyzers, bevel cutters, torque testers, trailers, counters, engravers, telephone system, microfilming equipment, projectors, blowers, portable gas or oil storage tanks, microscopes, battery chargers and testers, refrigerators, freezers, wrenches, communications equipment, mobile radio transmitters/receivers, sound equipment, stoves or heaters, calibrators, voltmeters, extinguishers, tanks, ladders, gauges, public address/paging system, and washing machines.

Schedule 1 Keystone Station The station contains unit-specific and common equipment, systems and auxiliaries used to operate the electric generating units. A listing of the Major Equipment specific to each unit is provided in the following table. 20,000/4160 v Racing (KV) Manufacturer Combustion Engineering Economizer spiral fin-inline Type Supercritical Air Heater regenerative Furnace Divided Pressure Rating balanced draft (PSI) Guns 8 No.2 oilFurnace Draft 8.l"wg Superheater Type radiant and convection Fuel Oil Additive ▇▇▇▇-▇▇ ▇ light Reheater Type radiant and convection Boiler Blowdown None Turbines: Manufacturer Westinghouse Type Double flow, Tandum, cross compound Generators Station Service Manufacturer Westinghouse Transformers: Manufacturer Pennsylvania Transformer Rating (KV) HP=450MW @ 20.000v LP=450MW @ 20,000v 20,000 KVA (One) Main Transformers: Reserve Transformers: Manufacturer General Electric Manufacturer General Electric Rating (KV) 20,000/525,000 volts Boiler:

Controls: Combustion Feed waterHoneywell TDC 3000 Burner Management Honeywell TDC 3000 Turbine Control ETSI/▇▇▇▇▇▇ Data Ac uisition Honeywell TDC 3000