CONFIDENTIAL Power Purchase Tolling Agreement

Table Of Contents (Continued)

Section / Page

POWER PURCHASE [TOLLING] AGREEMENT

between

SOUTHERN CALIFORNIA EDISON COMPANY

and

[Seller]

[August 14, 2006]

7/27/2006

- iv -

Power Purchase Tolling Agreement

Table Of Contents

Section / Page

RECITALS 1

AGREEMENT 1

ARTICLE ONE - Purchase and Sale of Product 2

Section 1.01 Product Type 2

Section 1.02 Purchase and Sale of Product 2

Section 1.03 Generating Units 3

Section 1.04 Delivery Points 4

ARTICLE TWO - TERM; CONDITIONS PRECEDENT AND DELIVERY PERIOD 4

Section 2.01 Term 4

Section 2.02 Conditions Precedent 4

Section 2.03 Expected Initial Delivery Date 5

Section 2.04 Delivery Period 5

Section 2.05 Early Initial Delivery Date 6

Section 2.06 Delayed Initial Delivery Date 7

Section 2.07 No Liability of SCE 7

ARTICLE THREE - EVENTS OF DEFAULT; REMEDIES; TERMINATION 7

Section 3.01 Events of Default 7

Section 3.02 Seller Events of Default 8

Section 3.03 Early Termination Date 10

Section 3.04 Calculation of Termination Payment 11

Section 3.05 Notice of Payment of Termination Payment 14

Section 3.06 Disputes Regarding Termination Payment 14

Section 3.07 Setoff 15

Section 3.08 Suspension of Performance 15

Section 3.09 Limitation of Seller’s Ability to Make or Agree to Third Party Sales from the Project/Generating Units after Early Termination Date 15

Section 3.10 Effect of Termination 15

ARTICLE FOUR - TRANSMISSION 15

Section 4.01 Interconnection Studies 15

Section 4.02 Acknowledgment 16

ARTICLE FIVE - DESIGN AND CONSTRUCTION OF GENERATING UNITS 16

Section 5.01 Seller’s Obligations 16

Section 5.02 Design Review 17

Section 5.03 EPC Contractor 17

ARTICLE SIX - CONSTRUCTION PERIOD AND MILESTONES 17

Section 6.01 Milestone Schedule 17

Section 6.02 Provision of Information 18

Section 6.03 Inspection Rights 18

ARTICLE SEVEN - COMMISSIONING AND TESTING 19

Section 7.01 Testing Costs 19

Section 7.02 Commercial Operation Test 19

Section 7.03 Contract Capacity & Ancillary Services Testing 20

ARTICLE EIGHT - SELLER’S OPERATION, MAINTENANCE AND REPAIR OBLIGATIONS 20

Section 8.01 Seller’s Operation Obligations 20

Section 8.02 Seller’s Maintenance and Repair Obligations 21

ARTICLE NINE - CONTRACT CAPACITY, ASSOCIATED ENERGY AND ANCILLARY SERVICES [Standard Product] 23

Section 9.01 Compensation 23

Section 9.02 Monthly Capacity Payment 23

Section 9.04 Pro Rata Capacity Payments 23

Section 9.05 Variable O&M Charge 23

Section 9.06 Start-Up Charge 23

ARTICLE NINE - CONTRACT CAPACITY AND ASSOCIATED ENERGY [QF Product] 24

Section 9.01 Compensation 24

Section 9.02 Monthly Capacity Payment 24

Section 9.04 Pro Rata Capacity Payments 24

Section 9.05 Monthly Energy Payments 24

ARTICLE TEN - ADJUSTMENTS TO CAPACITY PAYMENT FOR UNAVAILABILITY [and HEAT RATE] 24

Section 10.01 Availability 25

Section 10.02 Other Events of Unavailability 26

Section 10.03 Exchange Quotation Price 26

Section 10.04 Heat Rate Adjustment Payment 29

Section 10.05 Gas Index Restructuring 30

ARTICLE ELEVEN - PAYMENT AND BILLING 31

Section 11.01 Billing Period 31

Section 11.02 Timeliness of Payment 31

Section 11.03 Disputes and Adjustments of Invoices 31

Section 11.04 Netting of Payments 32

Section 11.05 Payment Obligation Absent Netting 32

ARTICLE TWELVE - Mark-to-Market Calculation 32

Section 12.01 Mark-to-Market 32

ARTICLE THIRTEEN - CREDIT AND COLLATERAL 34

Section 13.01 Financial Information 34

Section 13.02 Seller’s Credit Requirements 35

Section 13.03 Administration of Performance Assurance 38

Section 13.04 Disputed Calculations 40

Section 13.05 First Priority Security Interest 41

Section 13.06 Subordinated Security Interests and Mortgage 41

ARTICLE FOURTEEN - COLLATERAL ASSIGNMENT 43

Section 14.01 Consent to Collateral Assignment 43

ARTICLE FIFTEEN - GOVERNMENTAL AND ENVIRONMENTAL CHARGES 45

Section 15.01 Governmental Charges 45

Section 15.02 Compliance with Laws and Indemnification 45

Section 15.03 Environmental Costs and Indemnification 45

Section 15.04 Greenhouse Gas Emissions Tax 45

ARTICLE SIXTEEN - FUEL MANAGER [Standard Product] 46

Section 16.01 SCE as Authorized Fuel Manager 46

Section 16.02 Transportation Contracts 46

Section 16.03 Contracted Marketer 47

Section 16.04 Natural Gas Imbalances on SoCalGas Transportation Contract 47

Section 16.05 Manner of Transporting Natural Gas 47

Section 16.06 Gas Delivery Charge 47

Section 16.07 Gas Transporter Charges and Penalties; Reimbursement 48

Section 16.08 Changes to Tariff 48

Section 16.09 Seller’s Gas Events 48

Section 16.10 Imbalance Penalties Allocation 49

Section 16.11 Shared Access and Meter Data 49

ARTICLE SIXTEEN - FUEL MANAGER [QF Product] 50

ARTICLE SEVENTEEN – TOLLING [Standard Product] 50

Section 17.01 Tolling 50

Section 17.02 Title and Risk of Loss 50

ARTICLE SEVENTEEN – TOLLING [QF Product] 50

ARTICLE EIGHTEEN - CAISO AND NON-SCE DISPATCHES [Standard Product] 50

Section 18.01 CAISO Dispatch 51

Section 18.02 Non-SCE Dispatch 51

ARTICLE EIGHTEEN – CURTAILMENT AND DISPATCHES [QF Product] 51

Section 18.01 CAISO and SCE Curtailment 51

Section 18.02 Non-Permitted Dispatch 52

ARTICLE NINETEEN - SCHEDULING COORDINATOR 52

Section 19.01 SCE Scheduling Coordinator 52

Section 19.02 Notices 52

Section 19.03 CAISO Costs and Revenues 52

Section 19.04 Scheduling and Delivery Deviation Charge 52

Section 19.05 CAISO Uninstructed Deviation Penalty 53

Section 19.06 Calculation of SDD Administrative Charge 53

Section 19.07 CAISO Sanctions 53

Section 19.08 Terminating SCE’s Designation as Scheduling Coordinator 54

ARTICLE TWENTY – DISPATCH NOTICES AND OPERATING RESTRICTIONS 54

Section 20.02 Dispatch Notices 54

Section 20.03 Start-Up Notices 55

Section 20.04 Operating Restrictions 55

Section 20.05 Daily Operating Report 55

Section 20.06 Writing Requirements 55

Section 20.07 Communication Protocols 55

ARTICLE TWENTY-ONE - METERING, COMMUNICATIONS, and TELEMETRY 56

Section 21.01 SCE Access 56

Section 21.02 Control Logic 56

Section 21.03 Delivery of Data 56

Section 21.04 Satellite Communication System 56

Section 21.05 Gas Meter 56

ARTICLE TWENTY-TWO - OUTAGES 57

Section 22.01 Planned Outages 57

Section 22.02 No Planned Outages During Summer Months 57

Section 22.03 Notice of Forced Outages 57

Section 22.04 Reports of Forced or Planned Outages 57

Section 22.05 Inspection 57

ARTICLE TWENTY-THREE - FORCE MAJEURE 58

Section 23.01 No Default for Force Majeure 58

Section 23.02 Force Majeure Claim 58

ARTICLE TWENTY-FOUR - REPRESENTATIONS, WARRANTIES AND COVENANTS 58

Section 24.01 Representations and Warranties of Both Parties 58

Section 24.02 Representations and Warranties of Seller 59

Section 24.03 Seller’s Affirmative Covenants 60

Section 24.04 Seller’s Negative Covenants 60

ARTICLE TWENTY-FIVE - LIMITATIONS 62

Section 25.01 Limitation of Remedies, Liability and Damages 62

Section 25.02 No Representation by SCE 62

ARTICLE TWENTY-SIX - RECORDS 63

Section 26.01 Performance under this Agreement 63

Section 26.02 Sarbanes-Oxley and Securities and Exchange Commission Requirements 63

Section 26.03 Other Regulatory and Governmental Requirements 65

Section 26.04 Audit Rights 65

Section 26.05 California Climate Action Registry 65

Section 26.06 QF Efficiency Monitoring Program 65

ARTICLE TWENTY-SEVEN - DISPUTES 66

Section 27.01 Informal Resolution 66

Section 27.02 Mediation 66

Section 27.03 Arbitration 66

Section 27.04 Arbitration or Mediation Prior to Release of Deed of Trust 67

Section 27.04 WAIVER OF JURY TRIAL 67

ARTICLE TWENTY-EIGHT - INDEMNIFICATION 67

Section 28.01 Seller Acts and Omissions 67

Section 28.02 Breach of Representations, Warranties, and Covenants 67

Section 28.03 Insurance 67

Section 28.04 Survival 68

ARTICLE TWENTY-NINE - CONFIDENTIALITY/REGULATORY DISCLOSURE 68

Section 29.01 Confidentiality Obligation 68

Section 29.02 Compelled Disclosures 68

Section 29.03 Disclosures to Index Publishers 69

Section 29.04 Duty to Seek Protection 69

Section 29.05 Ownership and Return of Information 69

Section 29.06 Enforcement 70

ARTICLE THIRTY - MISCELLANEOUS 70

Section 30.01 General 70

Section 30.02 Notices 70

Section 30.03 Governing Law 70

Section 30.04 Amendment 71

Section 30.05 Assignment 71

Section 30.06 Waiver 71

Section 30.07 Obligations Surviving Termination 71

Section 30.08 No Agency 71

Section 30.09 No Third Party Beneficiaries 71

Section 30.10 Entire Agreement 71

Section 30.11 Severability 71

Section 30.12 Forward Contract 72

Section 30.13 Mobile Sierra 72

Section 30.14 Multiple Originals 72

Section 30.16 Signature Clause 72

7/27/2006

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Power Purchase Tolling Agreement

Table Of Appendices (Continued)

Appendix / Title / Location

APPENDIX A DEFINITIONS Attached to PPA

APPENDIX 1.02 Capacity and Ancillary Services [Standard Product] Excel Appendices

APPENDIX 1.02 Capacity [QF Product] Excel Appendices

APPENDIX 1.03 Generating Units Excel Appendices

APPENDIX 1.04.01 Energy DELIVERY Point Attached to PPA

APPENDIX 1.04.02 GAS INFORMATION Excel Appendices

APPENDIX 2.03 Expected INITIAL Delivery Date Excel Appendices

Appendix 6.01(A) MILESTONE SCHEDULE Attached to PPA

Appendix 6.01(B) CONSTRUCTION REPORT Attached to PPA

APPENDIX 7 Testing Protocols [Standard Product/Simple Cycle Generating Unit] Attached to PPA

APPENDIX 7 TESTING PROTOCOLS [Standard Product/Combined Cycle Generating Unit] Attached to PPA

APPENDIX 7 Testing Protocols [QF Product] Attached to PPA

APPENDIX 9.02 Monthly Capacity Payment Excel Appendices

APPENDIX 9.04 VARIABLE O&M RATE [Standard Product only] Excel Appendices

APPENDIX 9.04(A) MONTHLY ENERGY PAYMENT [QF Product only] Excel Appendices

Appendix9.04(B) TIME OF DELIVERY PERIODS AND ENERGY PAYMENT ALLOCATION FACTORS [QF Product only] Attached to PPA

APPENDIX 9.05 START-UP CHARGE [Standard Product only] Excel Appendices

APPENDIX 10.04.01 HEAT RATE INFORMATION Excel Appendices

APPENDIX 13.02.04.5 GUARANTY AGREEMENT FORM Attached to PPA

APPENDIX 13.03.02 LETTER OF CREDIT FORM Attached to PPA

APPENDIX 16.01 SoCalGas INTERCONNECTION Attached to PPA

APPENDIX 20.01 AVAILABILITY NOTICE Attached to PPA

APPENDIX 20.02 DISPATCH NOTICES Attached to PPA

APPENDIX 20.03 START-UP NOTICE Attached to PPA

APPENDIX 20.05 DAILY OPERATING REPORT Attached to PPA

APPENDIX 20.07 COMMUNICATION PROTOCOLS Attached to PPA

APPENDIX 21.03 DELIVERY OF DATA Attached to PPA

APPENDIX 22.01 PLANNED OUTAGE REPORT Attached to PPA

7/27/2006

- iv -

POWER PURCHASE [TOLLING] AGREEMENT

between

SOUTHERN CALIFORNIA EDISON COMPANY

and

[Seller]

This Power Purchase [Tolling] Agreement (“Agreement”) is made and entered into as of this ______day of ______, _____ (“Execution Date”) by SOUTHERN CALIFORNIA EDISON COMPANY, a California corporation (“SCE or “Buyer”), and [SELLER FULL NAME], a [Seller business form and state of formation] (“Seller”). SCE and Seller are sometimes referred to herein individually as a “Party” and jointly as the “Parties”. All capitalized terms used in this Agreement are used with the meanings ascribed to them in Appendix A to this Agreement.

RECITALS

This Agreement is made with reference to the following facts, among others:

A. SCE is an investor-owned electric utility serving customers in central and southern California.

B. Check only one of the following boxes and complete:

[ ] Seller [is constructing and owns a] [is refurbishing its] “Project”, consisting of one or more [type of technology, e.g. gas-fired] Generating Units (each, a “Generating Unit”) located at [address] (the “Site”); or

[ ] Seller owns a “Project,” consisting of one or more [type of technology] Generating Units located at [address] (the “Site”) and is constructing a transmission line from the Site to [interconnection location].

C. Seller wishes to sell and deliver exclusively to SCE and SCE wishes to purchase, Capacity, Energy, Resource Adequacy Benefits and other products from the Generating Units, under the conditions set forth in this Agreement.

AGREEMENT

NOW, THEREFORE, for good and valuable consideration, the Parties agree as follows.

ARTICLE ONE

Purchase and Sale of Product

Section 1.01. Product Type. The Product that is the subject of this Agreement is (check one box only):

[ ] Standard Product.

[ ] QF Product.

Section 1.02. Purchase and Sale of Product. During the Delivery Period, Seller shall deliver and sell, and SCE shall purchase and receive, the Product, subject to the terms and conditions of this Agreement, including the Operating Restrictions set forth in Appendix 1.02. Seller represents, warrants, and covenants that it will deliver the Product to SCE free and clear of all liens, security interests, claims and encumbrances. Seller shall not sell, assign or otherwise transfer the Product, or any portion thereof, to any third party other than to SCE or the CAISO pursuant to this Agreement. Moreover,

[Standard Product only: Seller shall not substitute or purchase any Capacity, Energy, Ancillary Services or Resource Adequacy Benefits from any other generating resource or from the market for delivery hereunder.]

[QF Product only: Seller shall not substitute or purchase any Capacity, Energy, Environmental Attributes or Resource Adequacy Benefits from any other generating resource or from the market for delivery hereunder.]

1.02.01 Capacity. SCE shall have the exclusive right to the Contract Capacity from the Generating Units. As of the Execution Date, the Contract Capacity shall equal the aggregate of the Expected Contract Capacity of each Generating Unit as set forth in Appendix 1.02.

The actual Contract Capacity of each Generating Unit will be determined in accordance with Article Seven. In no event may any Generating Unit’s actual Contract Capacity, as determined pursuant to Article Seven, exceed that Generating Unit’s Expected Contract Capacity.

1.02.02 Energy. [Standard Product only: Except for Energy resulting from a Non-SCE Dispatch,] Seller dedicates the Net Electrical Output of each Generating Unit to SCE, and SCE shall have the exclusive rights to all Energy produced by the Generating Units, [Standard Product only: including pursuant to a forward schedule or a Supplemental Energy instruction from the CAISO].

[Standard Product only:

1.02.03 Ancillary Services. SCE shall have the exclusive rights to all Ancillary Services Capacity and Associated Ancillary Services Energy from the Generating Units, subject to the limitations set forth in Appendix 1.02.]

[QF Product only:

1.02.03 Environmental Attributes. SCE shall have the exclusive rights to all Environmental Attributes associated with the Project.]

1.02.04 Resource Adequacy Benefits. Seller grants, pledges, assigns and otherwise commits to SCE the full Capacity of each Generating Unit in order for SCE to meet its Resource Adequacy Requirement and, if applicable, local RAR under any Resource Adequacy Rulings. Seller represents, warrants and covenants to SCE that Seller (a) has not used, granted, pledged, assigned or otherwise committed, and (b) will not use, grant, pledge, assign or otherwise commit any Capacity of any Generating Unit to meet the Resource Adequacy Requirement or local RAR of, or confer Resource Adequacy Benefits upon, any entity other than SCE during the Term. The Parties shall take all actions (including amending this Agreement and complying with all current and future Tariff provisions and decisions of the CPUC and/or any other Governmental Authority that address Resource Adequacy performance obligations and penalties) and execute all documents or instruments necessary to effect the use of the Resource Adequacy Benefits of each Generating Unit for SCE’s sole benefit throughout the Term.