bids are invited for custom bid for services - tank cleaning job of storage tanks at siliguri marketing terminal quote for item 10 shifting of pump assembly , custom bid for services - quote for item 20 transfering of bottom oil to another tan , custom bid for services - quote for item 30 degassing of tanks , custom bid for services - quote for item 40 mosru operation for wet sludge transfer , custom bid for services - quote for item 50 shifting of wet sludge , custom bid for services - quote for item 60 descaling sludge removal , custom bid for services - quote for item 70 roof drain dip pipe assembly cleaning , custom bid for services - quote for item 80 box up of the tank manholes , custom bid for services - quote for item 90 removal of the contaminated soil sludge , custom bid for services - quote for item 100 provision engagement of standby supervi total quantity :