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  15 of 40 may be affected by the works. If any service is found to exist, but is not as indicated in the  Contract, then the Contractor shall at once give written notification to the Engineer. The Contractor  shall record the position of all located existing services on the site plan, a copy of which shall be  made available to the Engineer by the Contractor.  The Contractor shall execute the works in such a manner, that he does not damage or interfere with  existing services on the site. If damage or interference is so caused the Contractor shall make his  own arrangements to execute the repairs at his own cost, and to the approval of the Engineer and  the relevant authority if applicable.  It shall be the Contractor's responsibility to safeguard by means of temporary or permanent  supports or otherwise all pipes, cables, structures and other things that would be liable to suffer  damage if such precautionary measures were not taken. This applies to all such items, existing and  proposed, owned by the Employer or others.  The Contractor shall make connections to existing pipework. Connections between existing  pipework and new pipework shall not be made until the necessary inspection and tests have been  completed and the Engineer has approved the new pipework.  The Contractor shall arrange at his own cost the supply and distribution of electricity, potable  water, telephone, compressed air and other services as are necessary to his site establishment and  shall provide, maintain and remove on completion all pipes, cables and fittings which carry such  services to his operations. All electrical installations forming part of such temporary installations  shall comply with current Turkish regulations.  The Contractor shall make all the necessary arrangements for his temporary construction utility  services according to local procedures and regulations.  4.12 Contractor's Designs  (Yellow Book, Sub-Clauses 5.1, 5.2, 5.3, 5.4 and 5.8)  The Contractor should indicate the design period for the WWTP and give a deadline for  completion of design under his work plan, which will be approved by the Engineer. 4.12.1 General  Based on these Employer’s Requirements, the Contractor shall, at his own cost, prepare detailed  designs including drawings and complete specifications of materials and workmanship to such  detail that not only the works can be executed on site, but also that the Engineer can approve the  Contractor's designs and intentions for the execution of the works. In addition, it is the  responsibility of the Contractor to obtain all the necessary approvals, certificates and permits from  the relevant authorities without cost.  The SI-system of units shall be used throughout the Contract.  All detailed designs shall comply with relevant Turkish legislation, regulations, the Environmental  Impact Assessment (EIA) Report and the obtained construction permission for the plant. The detailed designs, calculations and drawings, shall be collected in design reports, one report for  each discipline (process, civil works, structural, mechanical, electrical and SCADA) and divided in  sections for each subject.  The design report, etc. shall be submitted in 4 hard and soft copies. One copy shall be returned to  the Contractor with Engineer's comments.  4_Vol3_d4.3_Section 4 General Requirements_en_GIR_rev6 