120 Adelaide Street West Suite 1600 Toronto, Ontario M5H 1T1 T 416-967-7474 F 416-967-1947 www.ieso.ca FORM OF INDEPENDENT ENGINEER CERTIFICATE (COMBINED HEAT AND POWER-CHPIII) contract.management@ieso.ca IESOCM-FORM-016C(2013-05) EXHIBIT AA FORM OF INDEPENDENT ENGINEER'S CERTIFICATE RE COMMERCIAL OPERATION SUBMIT BY E-MAIL (PDF WITH SIGNATURE) TO contract.management@ieso.ca Capitalized terms not defined herein have the meanings ascribed thereto in the Contract. Date Legal Name of Supplier Name of Facility Agreement Title (the “Agreement”) Agreement Date Legal Name of Independent Engineer WHEREAS subsection [No.] of the Agreement between the Supplier and the Buyer dated as of [Contract Date] provides that the Facility will be deemed to have achieved Commercial Operation at the point in time when, inter alia, the Buyer has received a certificate (this “Certificate”) addressed to it from an Independent Engineer containing certain statements with respect to the Facility; AND WHEREAS [Legal Name of Independent Engineer] (the “Undersigned”) acts as the Independent Engineer for the purposes of delivery of this Certificate; NOW THEREFORE, THE UNDERSIGNED CERTIFIES to the Buyer, and acknowledges that the Buyer is relying on this Certificate, that: (i) the Undersigned is duly qualified and licensed to practice engineering in the province of Ontario; (ii) the Undersigned is neither an employee nor a consultant of the Supplier such that the majority of either the time or billings of the Undersigned during the 18 month period prior to the date hereof were devoted to the Facility; (iii) the Undersigned is not an affiliate of the Supplier nor directly or indirectly Controlled by the Supplier; (iv) the Facility has been completed in all material respects, excepting punch list items that do not materially and adversely affect the ability of the Facility to operate in accordance with the Agreement; (v) the Connection Point of the Facility is at the location specified in Exhibit A of the Agreement; (vi) the Facility has been constructed, connected, commissioned and synchronized to the IESO-Controlled Grid, a Local Distribution System or an End-User Load such that at least 100% of the Average Seasonal Contract Capacity for the Facility is available to generate Electricity in compliance with Good Engineering and Operating Practices; (vii) the Facility has successfully undertaken a performance test in accordance with recognized standards demonstrating the maximum capacity of the Facility and that the Facility has met the Average Seasonal Contract Capacity and the Minimum UHO Requirement for the Season in which the performance test took place. A copy of the performance test report is to be attached to the IE Certificate; FORM OF INDEPENDENT ENGINEER CERTIFICATE (CHPIII) IESOCM-FORM-016C(2013-05) Page 1 of 3 Independent Electricity System Operator (viii) the Independent Engineer reviewed the Metering Plan approved by the Buyer and all calculations have been performed in accordance therewith; and (ix) the Facility has, for four (4) continuous hours, using Primary Fuel and in compliance with all Laws and Regulations: (A) generated Measured Electricity at an uninterrupted rate, in each of such hours, of not less than 100% of the Average Seasonal Contract Capacity for the Season in which such generation took place multiplied by one hour; and (B) generated and delivered Measured UHO to the Host Facility at an uninterrupted rate, in each of such hours during which Measured Electricity was generated in subsection (ix)(A) above of this Certificate, that satisfies the Minimum UHO Requirement. For greater certainty: (i) if the Measured UHO does not satisfy the Minimum UHO Requirement, the Measured Electricity will not be adjusted with respect to such shortfall and the Facility will not satisfy the Minimum UHO Requirement, and (ii) the Host Facility must accept the UHO. Signed this [Day] day of [Month, Year] . [Legal Name of Independent Engineer] Per: Name: Title: [Name, P.Eng.] [Title] Professional Engineer Stamp of Signing Engineer FORM OF INDEPENDENT ENGINEER CERTIFICATE (CHPIII) IESOCM-FORM-016C(2013-05) Page 2 of 3 Independent Electricity System Operator APPENDIX A To Independent Engineer Certificate PERFORMANCE TEST REPORT FORM OF INDEPENDENT ENGINEER CERTIFICATE (CHPIII) IESOCM-FORM-016C(2013-05) Page 3 of 3