Code of Massachusetts Regulations
105 CMR - DEPARTMENT OF PUBLIC HEALTH
Title 105 CMR 122.000 - Nonionizing Radiation Limits For: The General Public From Non-occupational Exposure To Electromagnetic Fields, Employees From Occupational Exposure To Electro-magnetic Fields, And Exposure From Microwave Ovens
Section 122.006 - Definitions
As used in 105 CMR 122.000, the following words and phrases shall have the following meanings:
Accessible to the Public means areas not under the control of owner or operator of the facility.
Amateur means a person owning or operating a radiofrequency machine as a hobby.
Declared pregnant woman means a woman who has voluntarily informed her employer, in writing, of her pregnancy and the estimated date of conception.
Department means the Massachusetts Department of Public Health.
Director means the Director of the Radiation Control Program of the Massachusetts Department of Public Health.
Duty cycle means the time that the RF field is on, divided by the sum of the time the RF is on and off, during the operation cycle.
Employer means any person, firm, organization or other legal entity having the control or right to control a source of electromagnetic radiation, including but not limited to proprietor, lessee, and/or bailee.
Effective Radiated Power (ERP) means the power supplied to an antenna multiplied by the relative gain of the antenna in a given direction compared to a reference antenna. Below 1 GHz, and if unspecified, the reference antenna is a dipole. For frequencies above or equal to 1 GHz, the reference antenna is an isotropic antenna. The term effective radiated isotropic power is customarily used for frequencies equal to or above 1 GHz.
Exposure occurs whenever and wherever an individual is subjected to electric, magnetic, or electromagnetic fields, taking into account both level of field strength and length of time.
External surface means the outside surface of the cabinet or enclosure provided as part of the RF machine source, including doors, door handles, latches, and control knobs.
Facility means any location in which one or more radiofrequency machine(s) is (are) located, and which is owned, controlled, or maintained by the same person. In the case where a structure has multiple sources, each person who owns, controls, or maintains a radiofrequency machine or machines shall be considered to have a separate facility at that same site.
Far Field Region means the region in which an electromagnetic field is predominantly plane wave in character. There is no precise boundary between the non- far field regions and the far field region. The approximate distance from the radiating device at which the far field region may be considered to begin depends upon several factors, including the frequency of the electromagnetic radiation and the physical characteristics of the radiating device. In general this distance is approximately equal to 2D2 /[LAMDA] where D is the largest dimension of the radiating device facing the direction of interest and [LAMDA] is the wave length.
FCC means Federal Communications Commission.
Hertz means unit of frequency equal to one cycle per second.
Individual means any human being.
Industrial Establishments shall include manufacturing facilities, factories, workshops, mechanical facilities, laboratories, mercantile facilities, educational institutions, medical facilities, and all other buildings or parts thereof where such operations or activities such as: manufacturing, assembly, storage, research, broadcasting, therapy, testing, transfer and removal are carried on.
Intermittent Operation means an operation where the radiofrequency machine does not normally continually operate for a period of 30 minutes or more at one time and generally the transmitter operation is random in time.
Machine means a machine that emits radiofrequency (RF) electromagnetic radiation during operation.
Microwave Oven means a commercially manufactured oven which is designed to heat, cook, or dry food through the application of radiofrequency electromagnetic radiation, and which is designed to operate at a frequency of 915 MHz and/or 2450 MHz.
Near-field means the region of the electromagnetic field around a radiofrequency radiator in which the electric and magnetic fields do not have a fixed ratio from point to point. The near-field can be considered to extend from the source to points where a far-field description is valid.
Nonionizing Radiation (NIR) means the electromagnetic fields or energy in space for frequencies of the electromagnetic spectrum from ten kilohertz (kHz) to 100 Gigahertz (GHz). The measures of such "radiation", electromagnetic fields or energy are power flux (milliwatts per square centimeter), or mean-squared-electric-field (E)2,(V/m)2 or mean-squared-magnetic- field (H)2, (A/m)2. In some cases only (E)2 or (H)2 is applicable (e.g., certain near fields or fields at low frequency) and in other cases (e.g., the microwave far-field conditions) the power flux is more applicable. Even where only the measures of either (E)2 or (H)2 is of concern, it has become customary to express the field quantities in terms of equivalent (far-field, plane-wave) power densities. NIR is used interchangeably with the terms "RF radiation", "electromagnetic radiation" or "electromagnetic energy".
Nonionizing Radiation (NIR) Worker means an individual who has been informed by his or her employer that activities inconnection with their employment potentially involve access to areas exposed to radiofrequency radiation resulting from operation of a machine at the Place of Employment, where the exposure may exceed that allowed by 105 CMR 122.015.
Person means any individual, entity, corporation, partnership, firm, association, trust, estate, public or private institution, group, agency, political subdivision of this state, and other state or political subdivision or agency thereof, and any legal successor, representative agent or agency of the foregoing.
Place of Employment means every place, whether indoors, or outdoors, or underground, and the areas appurtenant thereto, into, in or upon which any employee goes, or remains, either temporarily or regularly, in order to perform required duties in the course of his or her employment.
Personal Wireless Services (PWS) means facilities licensed by the Federal Communications Commission under Title 47 part 24.
Public or Member of the Public means all members of society, including the unborn. As used in 105 CMR 122.006, it does not include employees of a facility who have been informed that their employment potentially involves being exposed to electromagnetic radiation.
Radiating Device means the antenna, leakage port or other part of a radiofrequency machine which emits radiofrequency electromagnetic radiation, excluding:
(1) those machines radiating at frequencies between 300 kHz and 100 GHz for which the effective radiating power is seven watts or less;
(2) machine components which are not in themselves capable of, or designed for, radiation of an RF field; and
(3) the signal generation portion of automatic or other test equipment designed to deliver a signal stimulus using coaxial or shielded cables to a device being tested.
Radiation Control Program means the Radiation Control Program of the Massachusetts Department of Public Health.
Radiofrequency (RF) means in the frequency range of 10 kilohertz (kHz) to 100 gigahertz (GHz).
Radiofrequency Exposure Limits (RFEL) means the non-occupational limits for the general public to electromagnetic radiation in terms of the mean squared electric (E)2 and magnetic (H)2 field strengths or in terms of the equivalent plane wave free-space power density (when applicable), as a function of frequency, as given in Table 1, 105 CMR 122.015 and the occupational limits for employees, as given exposure in Table 1, 105 CMR 122.100.
Radiofrequency (RF) Site means a fixed structure whose sole purpose is to provide a location for RF facilities.
Radiating Device means the antenna, leakage port or other part of a machine which emits radiofrequency electromagnetic radiation, excluding:
(1) Machine components which are not in themselves capable of, or designed for, producing an RF field; and
(2) The signal generation portion of automatic or other test equipment designed to deliver a signal stimulus using coaxial or shielded cables to a device being tested.
Radiofrequency (RF) Heater and RF Sealer means devices operating between 300 kHz and 300 MHz used to heat, melt or cure materials such as plastic, rubber, or glue by subjecting the material to a RF energy field. Included in this category are dielectric and induction heating devices.
Radiofrequency Machine means any fixed device, machine, equipment or installation which is capable of generating a radiofrequency electromagnetic field.
Regularly Occupied refers to an enclosed area, building, or other freestanding structure which may, at any given point in time, be occupied by a given member of the public on a continual basis and excludes occasional visitors, passersby, and service personnel.
RF Safety Officer refers to a person who by virtue of training or experience has acquired knowledge or instruction in RF electromagnetic fields and their measurement. The individual designated may be the Facility owner, an employee, or an agent hired by the employer.
Single Source Emitter means a radiofrequency facility containing one or more radiofrequency machines only one of which is normally radiating at a given time.
Survey means the measurement, by appropriate instrumentation, of the level of potential occupational RF radiation exposure incidental to the use of a machine.
