28 of 49 Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 05: Earth Works, Pipe Works and Ground Improvement  Open ends shall be stopped with plugs, caps or blank flanges properly jointed.  It shall not be permitted to transfer the thrust on to a completed length of pipeline or onto an existing  pipeline.  Before the pressure testing of the pipeline is carried out, the trench shall be sufficiently refilled to en- sure that the requisite anchorage is provided for each pipe to prevent movement during the testing pe- riod.  Adequate provision for the release of air from the pipeline must be made at any high points and blank  flanges.  Potable water shall be used for the cleansing, testing and swabbing of the water pipelines unless oth- erwise directed by the Engineer.  5.3.10.2 Testing Method Programme and Notification  Before any testing of a pipeline, the Contractor shall submit a programme of testing to the Engineer  for approval.  The Contractor shall notify the Engineer at least 5 working days beforehand of his intention to test a  section of pipeline.  On completion of main laying and sectional testing and before leaving the site, the whole pipeline  shall be subjected to an overall comprehensive pressure test. The consent of the Engineer is to be  sought for the testing arrangement before the tests commence.  The Contractor shall be solely responsible for deployment of his labor, equipment and materials dur- ing the period of notice and test, and no claims for extra payment for unproductive time in this period  shall be made.  Tests shall be against blank flanges or end caps. Tests against closed valves shall not be permitted un- less specified elsewhere in the Contract.  The Contractor shall take all reasonable precautions to prevent any undue wastage of water, and shall  provide, fix, maintain and work all necessary storage tanks, pumps, pipes, cocks, fittings, hoses and  other appliances as necessary.  5.3.10.3 Testing of Non-Pressure Pipelines  Non-pressure pipelines laid in open cut shall be tested after they are jointed and before any backfilling  is commenced, other than such as may be necessary for structural stability whilst under test.  The pipelines shall be tested by means of an air or water test or by a visual or close circuit television  (CCTV) inspection (as agreed with the Engineer), in lengths determined by the course of construction,  in accordance with a programme approved by the Engineer. CCTV records shall be submitted together  with as-built drawings of each part, zone or section of the Works.  A further test shall be carried out after the backfilling is complete.  Testing of non-pressure pipelines shall be performed in accordance with requirements of EN 1610 or  as specified below.  5.3.10.4 Leakage test  5.3.10.5 Water Test for Non-Pressure Pipelines  Each part of the pipeline shall be tested for leakage. Conractor shall submit the method for testing of  pipelines for Engineer’s approval.  The test pressure for non-pressure pipelines up to and including 750mm nominal bore shall be not less  than 1.2 m head of water above the pipe soffit or ground water level, whichever is the higher at the  5_Vol3_d4.3_Section 5 Earth and pipe works_en_GIR_rev6.docx 