2010 March – October: Lake Hawthorn (Vic). Insecticide in Sediment from Locust Control: Chlorpyrifos My locationGet Directions An Assessment of Effects of the 2010-2011 Australian Plague Locust Response on Victorian Aquatic Ecosystems Centre for Aquatic Pollution Identification and Management Technical Report #9 Bryant Gagliardi, Sara Long, Gavin Rose, Lisa Golding, Jason Lieschke, Tara Daw Quadros, Leon Metzeling, Vincent Pettigrove. December 2011 28/10/10 Lake Hawthorn Chlorpyrifos 28ug/kg (sediment) 17/3/10 Lake Hawthorn Chlorpyrifos 22ug/kg (sediment) http://www.energyandresources.vic.gov.au/energy?a=163202