a)Operation and maintenance of 315 KVA substation internal and external lighting including all electrical accessories at Business Club, swimming pool and others at AA- IB, Newtown, Kolkata under NKDA. (From 01/01/2017 to 30/06/2017 i.e. for 6 (Six) month. b)Comprehensive maintenance of electrical installation and accessories at IIB Park, IIC Park, IID Park & Cricket Play Ground at IID under NKDA. [From 01/01/2017 to 31/12/2017.] c)Comprehensive maintenance of electrical installation