All testing under “dry” conditions(pre-commissioning) shall be completed to the satisfaction of  the Engineer prior to the introduction of “wet” conditions (commissioning) to the plant. . For the  key equipment such as aeration blowers, diesel generators, sludge thickening, dewatering and  drying equipment and instruments the Contractor shall arrange the supplier’s expert staff to carry  out and assist the pre-commissioning and commissioning test. All necessary consumables including electricity, spare parts, tools, lubricants, electricity, etc. for  the carrying out of tests shall be supplied by the Contractor as part of the Contract. 4_Vol3_d4.3_Section 4 General Requirements_en_GIR_rev6  Tests of electrical equipment  Tests of mechanical equipment  Test of structures and pipes  These tests are related with commissioning of the works and the individual units of the each  equipment by taking its hydraulic, electric and mechanical compliance into consideration. The  Contractor shall set out, in his construction documentation, a full list of the pre-commissioning and  commissioning tests to be carried out under the Contract to prove compliance with the Employer’s  Requirements. Such tests shall include, but not necessarily be limited to:  The pre-commissioning and commissioning tests under dry and wet conditions as appropriate shall  include all procedures and functions, safety, emergency as well as normal procedures. The  Engineer will decide on the equipment to be dry and wet tested.  carry out the failed and/or incomplete test(s) in the same way as explained in the contract till  satisfactorily complete them in a time to be determined by the Engineer.  4.19.2 Pre-commissioning & Commissioning Tests  29 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  • Leakage and pressure tests; and  • Construction materials testing.  • Tests of correct direction of rotation of motors;  • Tests of automatic operation;  • Tests of manual operation;  • Tests of capacity of all machines individually and as part of the entire plant; and  • Tests of quality of materials.  • Tests of alarm systems;  • Tests of the emergency switch system;  • Tests of manual operation;  • Tests of all interlocking systems;  • Tests of indications;  • Tests of all panel functions;  • Tests of safety systems;  • Tests of all signals to the SCADA PLC;  • Tests of modifications of the control systems (new start and stop level etc.); and  • Full test of all signals to and from the PLCs, instruments and signal converters. 