Performance Testing 7.2.1 The Design-Builder shall direct and supervise the tests and, if necessary, the retests of the Plant using Design-Builder’s supervisory personnel and the Air Emissions Tester shall conduct the air emissions test, in each case, in accordance with the testing procedures set forth in Exhibit A (the “Performance Tests”), to demonstrate, at a minimum, compliance with the Performance Guarantee Criteria. Owner is responsible for obtaining Air Emissions Tester and for ensuring Air Emissions Tester’s timely performance. Design-Builder shall cooperate with the Air Emissions Tester to facilitate performance of all air emissions tests. Design-Builder shall not be held responsible for the actions of Owner’s employees and third parties involved in the Performance Testing, including but not limited to Air Emissions Tester.