contract of boiler chamber , cleaning of boiler chamber , labor rates for ash cleaning of boiler furnaces with chambers and shifting of this ash to a suitable place in boiler station area in each shift during whole crushing season 2019-20 , labor rates for wet scrubber ash pit cleaning and dumping the ash at a suitable place in the mills in each shift for the whole crushing season 2019-20 , note : 1 . above work should be done two times in each shift and to be got checked by shift engineer / chief engineer . 2 . there should be three workers of contractor in each shift and they can be deputed elsewhere in the mills at the labor type job , like firewood shifting , for firing , etc .