HELITEM Survey Location 1 HELITEM system setup 83m 35m 2 Survey - PDF document

HELITEM Survey Location 1

HELITEM system setup 83m 35m 2

Survey Basics 3

Basic EM Principles All airborne EM systems work on the same principle: they transmit an EM field (the “primary field”) that induces electrical currents in anything conductive. These currents are shifted in time from the primary field, and generate a “secondary” EM field, that is detected by the electrical currents at the receiver. Tx – Transmitter Rx – Receiver

Basic EM Principles The primary field will also induce electrical currents in a single (or confined) conductor in the ground. The currents in this conductor will also create a secondary field that can be detected at the receiver. Currents induced in conductor Currents in earth distorted.

FAQs  What is a HELITEM survey? A HELITEM survey involves the towing of an electromagnetic transmitter and receiver array (“boom”) underneath a helicopter at a flying height of 85m along a pre planned survey grid. The resulting data can provide a wide range of information for various uses including the location of underground water sources, areas of saline soil, mineral resources, subsurface faults, buried infrastructure or other items.  Is the electromagnetic field transmitted by the HELITEM system bad for my health? The EM field transmitted by the HELITEM system is about the same level as the field generated by a normal electric kitchen stove set to high, and are around 10,000 times below what is considered safe.  Will the HELITEM system affect my TV/ mobile phone/ radio reception? The EM transmission operates on a completely different frequency to normal household equipment, and will not interfere in any way.  Will the HELITEM survey affect my livestock? In our experience, the noise from any low flying aircraft may cause some animals to disperse. The pilot will monitor the behavior of any animals encountered and if some appear to become stressed, can move off to survey another part of the project. Apart from the noise of the aircraft, the system itself will have no affect on people, livestock or crops. 6

FAQ Continued  Will the aircraft land on my property? Unless prearranged with the landowner or in the case of an emergency, the helicopter will not land on private property.  Will the helicopter fly directly over my house? The survey pilot will adhere to CASA regulations and safe operations at all times during the survey. This will mean the aircraft will not fly over dwellings or occupied vehicles.  How long will the helicopter be operating near my house? The current project is planned at 100m or 200m line spacing with each survey line being acquired once. The aircraft travels at approximately 100km/h while on survey meaning you may see the helicopter for a minute or so at a time while it is surveying nearby, but the aircraft will get further and further away with each fly by. Most people will only see the helicopter over a period of a few hours, depending on the size of your property. Some survey lines may need to be re-flown if there are acquisition problems. As currently planned, all survey lines will be complete within approximately 4 to 6 days.  Bookmark the survey information webpage at: http://www.hillgroveresources.com.au/section/Community/Helicopter_Survey 7