on the completion of the works the contractor shall clear away and remove from the site all constructional plant， surplus materials， rubbish and temporary works of every kind， and leave the whole of the site and works clean in a workmanlike condition to the satisfaction of the employer.17 labor
the contractor shall make his own arrangements for the engagement of all labor， local or otherwise， and， save insofar as thecontract otherwise provides， for the transport， housing， feedingand payment thereof.
the contractor shall， so far as is reasonably practicable， having regard to local conditions ，provide on the site ， to the satis - faction of the employer ， an adequate supply of drinking and other water for the use of contractor''s staff and work people.
the contractor shall not， otherwise than in accordance with the statutes， ordinances and government regulations or orders for the time being in force， import， sell， give， barter or otherwise dispose of any alcoholic liquor， or drugs， or permit or suffer anysuch importation， sale， gift， barter or disposal by his sub - contrac - tors， agents or employer.
the contractor shall not give， barter or otherwise dispose of to any person or persons， any arms or ammunition of any kind or permit or suffer the same as aforesaid.
the contractor shall in all dealings with labor in his em - ployment have due regard to all recognized festivals， days of rest and religious or other customs.
in the event of any outbreak of illness of an epidemic nature， the contractor shall comply with and carry out such regulations， orders and requirements as may be made by the government， or the local medical or sanitary authorities for the purpose of dealing with and overcoming the same.
the contractor shall at all times take all reasonable precautions to prevent any unlawful， malicious or disorderly conduct by or amongst his employees and for the preservation of peace and protection of persons and property in the neighborhood of theworks against the same.18 materials and workmanship
all materials and workmanship shall be of the respective kinds described in the contract and in accordance with the employer''s instructions and shall be subjected from time to time to such tests as the employer may direct at the place of manufac - ture or fabrication， or on the site or at such other place or places as may be specified in the contract， or at all or any of such places the contractor shall provide such assistance， instruments， machines， labor and materials as are normally required for examining， measuring and testing any work and the quality， weight or quantity of any material used and shall supply samples of materials before incorporation in the works for testing as may be selected and required by the employer.