The map came from the Hume Coal Review of Environmental Factors which is submitted to the government prior to drilling approval (which was subsequently received on May 6). It shows the exploration boreholes they are the proposing to drill in the Sutton Forest coal lease AUTH 349. The entire original document can be found here on the NSW Department of Primary Industries site.
This mining infestation is coming to the prime agricultural land which you love and cherish. You need to stand up and be counted and resist in your own right. Do not leave it all up to SCHAG. Write yourself. All of us at SHCAG do the very best we can but numbers count!