Descripción: “...This study focused on analyzing the evaporation in the open air as a process of elimination of chemical waste, determining the speed, volume, time and temperature evaporation both outdoors and in the shade, be used as simple methodology the use of stainless steel trays, containing small volumes of waste, allowing its rapid process of evaporation, is working with eight (8) lines of chemical residues which were segregated in the laboratories of general chemistry at the University of Pamplona, as a result, it presents the reduction of 20.46 liters(50.84 %) of the 40.24 liters stored during the periods of 2009 and 2010.Keywords: evaporation, system, treatment, chemical waste, sediment, surface, sunstroke. ...”