Apply for a licence to possess a soil density or moisture gauge for geotechnical measurement purposes. You can apply for this licence as corporation or an individual.
Apply for an approval to acquire radioactive substances in a portable density/moisture gauge. You will approval every time you seek to purchase or otherwise obtain a radiation source.
Apply for a licence to use a radiation source for geotechnical measurement purposes. You will need this licence before you can perform the geotechnical measurement.