39 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  calculations and daily average of recorded data of consumables (electricity and chemicals)  of remaining days shall be multiplied by 365 days to calculate actual annual consumption  of those consumables (electricity and chemicals).  In case of compliance failure, the Contractor shall execute the improvement as quickly as  technically possible with reasonable consideration to all occurrences. The work must be completed  within maximum 3 months. The Contractor pays all costs related to improvement works.  After a new trial operation of maximum 1 month from completion of improvement works, a new  analysis of the control requirements is carried out. If results show that the control requirements are  not met, the above procedure must be repeated.  The Employer/End Recipient shall pay all expenses related to sampling and analysis during the  Defects Notification Period. If additional analyses are needed in order to fulfill the guarantee, the  Contractor will pay the expenses for these analyses.  The performance test shall be executed only if found necessary by the Engineer, and shall be  carried out by an independent body with the Engineer and the Contractor present.  If the test concludes that all test-values are in compliance with the requirements, the Contractor  shall pay only the costs related to his presence, and the Employer shall cover all other costs  including electricity, water, chemicals, independent body, staff etc.  If the test concludes that one or more parameters are not in compliance with the requirements, as  set out in the Section 7.8.30, the Contractor shall cover all costs in connection with the testing  excluding electricity. The required aeration capacity in process tanks is checked as a re-oxidation test in clean water, and  the test is carried though in compliance with EN 12255-15 with the following additions:  The independent body shall present the results in a Test Report in compliance with EN 12255-15,  comprising the measured and calculated test values attached as appendices. The comparison of the  4_Vol3_d4.3_Section 4 General Requirements_en_GIR_rev6   If the tank is operated with a plug flow (ring canal), the flow velocity in the tank is to be  measured after half an hour’s operation as an average flow velocity equally spread over the  cross section. Velocity measurements are carried out by means of hydrometric wing-meter.   The aeration tank is filled to normal water level by potable water or ground water and after  de-oxidation the blower(s) and mixers (if any) are started; and  The Engineer for the test of the aeration grids chooses one of the aeration tanks;  Presentation of the results  Test procedure  4.21.3 Verification of mechanical equipment performance  Test procedure for aeration grids  4.21.2.3  Payment of expenses  4.21.2.2  Remedial action 