residual sludge removal, treatment and internal cleaning of crude oil storage tank ( 13-tf-001e ) at cpcls cbr in nagapattinam, tamilnadu residual sludge removal, treatment and internal cleaning of crude oil storage tank ( 13-tf-001e ) at cpcls cbr in nagapattinam, tamilnadu , mobilisation & installation of all required equipments, connected piping, hoses etc., and mobilisation of required machineries, tools and tackles, manpower etc., required for sludge treatment as per the scope of work. the contractor has to mobilisemechanical treatment unit ( upon the receipt of foa ) in order to take up the sludge processing in crude tank. the unit of this sor item is ea which represent lumpsum rate per unit mobilisation. , processing of oily sludgeby in-situ mechanical treatement method including pumping of unpumpable liquid and transfering the recovered oil to the desingnated tank as per the scope of work. , manual cleaning of left over sludge, disposal, thorough internal cleaning of the tank andmaking the tank inside gas / oil / solid free and area cleaning the tank dyke area. dyke area cleaning includes grass cutting, disposal of scraps to designated area, disposal of spill over oil / sludge to designated place as per eic, dressing and leveling of excavated portion, etc. the tank shall be made ready to start mechanical maintenance jobs i.e. hot work jobs by other agency immediately after completion of sluge processing works without any further cleaning by them as per the enclosed scope of work.the unit of this sor item is ea which represent lumpsum rate per each tank. , de-mobilisation of all equipments, tools and tackles etc., and clearing the site.the unit of this sor item is ea which represent lumpsum rate per unit de-mobilisation.