The NOA dataset was compiled by the NSW Department of Trade and Industry and identifies areas where asbestos quarrying has occurred in the past and the potential for NOA based on existing known deposits and the mineralogy and geological history of the host rocks. 

Source:  Oberon Review 21/04/2016

The intention of the mapping and accompanying factsheets is to reduce the risk of potential exposure to NOA through ground disturbing activities such as road building, agriculture, forestry, mining and urban development. 

Image: Naturally occurring Asbestos in NSW map