1. Currently at Royal Dutch Shell, HSE Technology - Soil and Groundwater; Lange Kleiweg 46; Rijswijk the Netherlands
2. KWR Watercycle Research Institute, Watersystems and Technology Knowledge Group, P.O. Box 1072, 3430BB Nieuwegein; the Netherlands
3. Maas GA, Zuidsingel 114, 4331RW Middelburg; the Netherlands