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. 

