Every now and then something interesting goes on outside my window. Today the sludge cleaners have arrived. Not sewage, just collected runoff water and mud, but still fairly stinky. The cleaners work in a 5 man team. One guy uses a pick axe to lift out the lid. Another brings over a sludge bucket. A third uses a long bamboo pole with with a sack on the end to scoop out the sludge. The sack has a ring on the bottom, and one guy uses a metal rod to lift the sack up and dump out the contents. Once a bucket is filled, two other guys mount it onto a truck. A fairly clean operation, unless the truck tipped over.