Physical Agents

EMF (Electromagnetic Fields)

Electromagnetic fields (EMF) are invisible lines of force present everywhere in our environment. EMF, as it generally pertains to environmental health exposure, refers to extremely low frequency (ELF) electric and magnetic fields, ranging from 3 to 3,000 Hz. This range includes power-frequency (50 or 60 Hz) fields. These fields can induce currents within the human body, which if sufficient can produce a range of effects such as heating and electrical shock; however to produce such extreme health effects, the fields outside the body would have to be much stronger than present in normal environments.

Common sources of exposure to EMF include power lines, appliances, and mobile phones. There is no doubt that short-term exposure to very high levels of electromagnetic fields can be harmful to health and is typically applicable to workers in the power industry.  To date, no adverse health effects from low level, long-term exposure to radiofrequency or power frequency fields have been confirmed; however scientists continue to conduct research in this field.  Some previous studies had indicated an association between elevated exposure and childhood leukemia.

FACS can provide EMF surveys for homeowners and businesses concerned about EMF exposure.  Additionally, FACS can conduct hazard assessments for workers in power, radio, or other industries where exposure to high levels of electromagnetic fields may be expected.


Potential health effects of noise exposure have been recognized for many decades.  Noise exposure concerns may arise in the occupational arena (OSHA compliance, hearing loss prevention, or interference with conversation/concentration) or in the community (residential noise complaints).

FACS provides a variety of noise-related services to assist a wide range of clients.  We conduct noise dosimeter monitoring to assess worker exposure (dose).  We collect sound level measurements, including point source quantification and octave band analysis.  We provide assistance in the design, implementation, and evaluation of hearing conservation programs and of engineering controls.  FACS also helps clients assess the effectiveness of hearing protectors.

FACS noise assessment clients include general and specialty contractors, power plants, hospitals, schools, and office building managers and tenants.