Needing a clean environment to install a new hydrolysis unit Khun Chang asked that the engine be thoroughly cleaned. He suggested a cleaning service north of Kad Meung Mai a hundred metres or so from the Mae Kha. As can be seen they did a splendid job removing 20 years of grime and taking nigh two hours to complete the work. This gave time for a stroll down to the Mae Kha and to have a coffee in a fine bone china cup at a nearby breakfast cafe. On returning to collect truck and inspecting the cleaning facility it was apparent that all the greasy grime from the truck had run down the storm water drain to the Mae Kha.