19 samples of ground water were taken from Burswood Island in 1986, by the Entomology Branch, to assess the effects of Argentine Ant treatments. All samples were found to contain <0.01ug/L of any organochlorine except one sample containing 0.09 ug/L of heptachlor.
P38 Monitoring Pesticides – A Review. A Report to the Environmental Protection Authority by Peter A Rutherford. December 1989