Non-occupational Radiofrequency Exposure Limits for the General Public

(A) No person shall knowingly operate or allow for the operation of a radiofrequency machine in a manner that exposes or may expose any member of the public in a regularly occupied space within the Commonwealth of Massachusetts, to a radiofrequency electromagnetic field which has a mean squared electric or magnetic field strength or an equivalent plane wave free-space power density in excess of the applicable Radiofrequency Exposure Limits listed in 105 CMR 122.015: Table I. (B) In the event of scan failure or other failure in the normal parameters of the scanning operation causing a change in angular velocity, amplitude duration, or rate of exposure, no radiofrequency machine which emits scanned radiofrequency radiation in areas accessible to the public shall be operated without protective measures to prevent exposure in excess of the radiofrequency exposure limits listed in 105 CMR 122.015: Table I. These are average values over any 0.5 hour period. See 105 CMR 122.290: Appendix A. This table does not apply to microwave ovens, refer to 105 CMR 122.040. See 105 CMR 122.290: Appendix A for calculation of equivalent plane wave free space power density in the non far field region. 105 CMR 122.015: TABLE I NON-OCCUPATIONAL RADIOFREQUENCY EXPOSURE LIMITS FOR THE GENERAL PUBLIC1 Maximum Allowed Maximum Allowed Maximum Allowed Equivalent Plane Wave Mean Squared Mean Squared Free Space Electric Field Magnetic Field Power Density2 Frequency Range Strength (V/m) Strength (A/m) (mW/cm ) ____________________________________________________________________________ 300kHz-3MHz 80,000 3MHz-30MHz 800(900/f ) 0.005(900/f ) 180/f 30MHz-300MHz 300MHz-1500MHz 800(f/300) 0.005(f/300) f/1500 1500MHz-100GHz 4,000 As used in Table I: f = frequency in megahertz (MHz) V = voltage in volts A = current in amperes m = length in meters cm = area in square centimeters mW = power in milliwatts For mixed or broadband fields consisting of a number of frequencies for which different Radiofrequency Protection Guides are listed in 105 CMR 122.015: Table I, the fraction of the Radiofrequency Exposure Limits incurred within each frequency interval shall be determined, and the sum of all such fractions shall not exceed unity.