Buffalo Airport situated in New York State USA is subject to significant range of climatic conditions through the year. Temperatures in winter can drop well below freezing for extended periods requiring the use of substantial levels of antifreeze, in the form of glycol, to keep runways open and aircraft operational. Subsequently, when the ice and snow melt, or following rainfall, the run off generated is contaminated with glycol which constitutes an environmental hazard if it is discharged to the environment without treatment. This had  been managed by collection and delivery to the local sewage network which carried significant annual costs charged by the local municipal treatment company based on flows and loads. Buffalo Airport was keen to determine a method of controlling and managing these costs.