Since HFC will be providing accommodations for individuals suffering negative impacts from electromagnetic forces, it is prudent to conduct a site survey as part of our canary specific due diligence. There are several commercial operations offering this service. The analysis of electromagnetic forces can be measured both below and above ground. A mapping of these forces and their intensity will greatly assist in determining whether to proceed with the acquisition of a specific property. Alternatively, if the property is overall good, the mapping will show where the best location would be, within the overall site, for the construction of housing which minimizes possible EMF impacts. Above ground, significant electromagnetic forces are generated by radio towers, cell towers, and electrical transmission towers. Sub surface forces can be generated by underground transmission lines carrying electrical loads, as well as by naturally occurring EMF due to the mineral content in the soil.