proposal for placement of an annual contract for operation and maintenance ( mechanical and electrical both ) of ash handling plant , sgtpp ( 2x300mw ) for 02 years , annual contract for operation and maintenance ( mechanical and electrical both ) of ash handling plant , sgtpp ( 2x300mw ) for 02 years , mandatory mechanical job : mechanical maintenance work of ahp for 24 months , mandatory electrical job : electrical maintenance work of ahp for 24 months , mandatory operation job : operation of ahp for 24 months , mechanical optional job : cleaning of economizer hopper ash by manual method ( including bagging & bag will be provided by the party ) or by water per hopper basis during shut down condition and disposal of ash at suitable location , mechanical optional job : cleaning of air-preheater hoper ash by manual method ( including bagging & bag will be provived by the party ) or by water per hopper basis during shut down condition and disposal of ash at suitable location , mechanical optional job : cleaning of clinkers , damaged refractory or resuadual ash from inside the bottom ash hopper during shut down condition and disposal of same at suitable location . , mechanical optional job : over hauling of ba clinker grinder including dismantling & reffiting of clinker grinder , chute , mechanical optional job : replacement of power cylinder for ba hopper feed gate , mechanical optional job : alignment of ba hopper feed gate during during shutdown condition . strengthening of different supports feed gate and if required replacement of guide rail , roller , wedge etc . , mechanical optional job : overhauling of vacuum pumps including dismantling & refitting of vacuum pump . , mechanical optional job : replacement of flushing apparatus including dismantling & refitting of flushing apparatus . , electrical optional job : ht cable jointing work . , electrical optional job : cable laying 185 sq . mm . 3core cu cable .