35 of 40 Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 04: General Requirements for the Execution and Completion of the Works  The required odor level to be fulfilled is stated in Volume 3: Employer's Requirements, Section 2:  Design Basis, 2.6.2. The procedure of acceptance test shall be as follow:  The odor shall be measured at a height of 2 meters above the ground and at a lateral distance of 1.5  m away from the odor removal unit at 24 hour average.  When respective axial fan/s of a building/tank is running, the odor value shall not be more than  1000 OU inside the buildings and at max. 1 m distance to the tanks and other odor sources.  These tests shall be maintained consecutive 12 days and minimum 10 days shall conform to  acceptance criteria. (Yellow Book, Clause 10)  4.20 Employer's Taking-Over of the Works  Once the Contractor has satisfactorily completed the necessary tests, to demonstrate compliance  with the Employer’s Requirements and performance guarantees, he shall submit a Final Test  Report to the Engineer summarizing the test results which is specified in article 4.15. This report  shall be accompanied by:  The issuing of the Taking-Over Certificate by the Engineer shall, in addition, take place after the  following demands have been fulfilled:  • A statement from the Contractor that, in his opinion, the works have passed the tests  on completion; and  • An application for a Taking-Over Certificate.  • The operation and maintenance manual has been handed-over to the Engineer in its  final version  • The as-built drawings have been handed-over to the Engineer,  • The End Recipient’s operational staff have been trained as per Section 11 of Volume  3,  • All works has been tested on-site for all functions and performance by the Contractor  to the satisfaction of the Engineer, and documented in the quality assurance and test  report; and the quality assurance and test report have been handed-over to the  Engineer.  4.21 Test after Completion/Performance Measurement  (Yellow Book, Sub-Clause 12)  Tests after completion shall be carried out on the initiative of the Engineer during/prior to the  expiration of the defects notification period for final verification of all the performance  requirements.  All measurements shall be carried out in the presence of the Engineer or such other body appointed  for this purpose unless the Engineer states otherwise in writing.  Below is described the performance measurement procedures for the final verification of the  treatment performance and the most essential mechanical equipment.  4_Vol3_d4.3_Section 4 General Requirements_en_GIR_rev6  4.21.1 General 