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A=COM Americas Non-Ionizing Radiation S3AM-121-PR1 1.0 Purpose and Scope 1.1 Provides the requirements and guidelines to control occupational and public exposure to non-ionizing radiation, including lasers and radiofrequency(RF), infrared (IR), and ultraviolet(UV)radiation. 1.2 This procedure applies to all AECOM Americas employees and operations, and any other entity and its personnel contractually required to comply with this document's content, except where local or governmental regulations are more stringent. 2.0 Terms and Definitions 2.1 Controlled Environment—An area where the occupancy and activity of those within is subject to control and supervision for the purpose of protection from radiation hazards. 2.2 Hazard Distance—Distance from a radiofrequency emitter at which the power density equals the Uncontrolled Environment Maximum Permissible Exposure Limit power density level as established by the latest edition of the ANSI C95.1. 2.3 ANSI Z136.1 Safe Use of Lasers—American National standard issued applicable to the safe use of lasers and laser systems emitting laser radiation in the wavelength range 180 nanometres to 1 millimetre. The standard defines the classification of lasers(Class 1, 1 M, 2, 2M, 3R, 313 and 4) based on Accessible Emission Limit(AEL)and viewing conditions. 2.4 Infrared (IR)—Electromagnetic radiation having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves. Infrared radiation has a wavelength from about 800 nm to 1 mm, and is emitted particularly by heated objects 2.5 Laser—An acronym for Light Amplification by Stimulated Emission of Radiation. 2.6 Maximum Permissible Exposure(MPE) Limits—The level of exposure which is considered as the limit between safe and potentially harmful. 2.7 Non-ionizing Radiation—Any type of electromagnetic radiation that does not carry enough energy to ionize atoms or molecules. Examples include radiofrequency radiation, microwave radiation, ultraviolet radiation, visible light, infrared radiation, lasers, static electric and magnetic fields, etc. 2.8 Radio frequency(RF)—Any of the electromagnetic wave frequencies that lie in the range extending from around 3 kHz to 300 GHz, and includes frequencies used for communication signals(e.g. radio, cell-phone, etc.)or radar signals. 2.9 Ultraviolet(UV)—Electromagnetic radiation having wavelengths between that of ordinary, visible violet light that of x-rays. Ultraviolet radiation is made up of three types of rays;A(UVA), B (UVB), and C(UVC). UV radiation is present in sunlight, and also produced by electric arcs and specialized lights(e.g. mercury-vapor lamps, black lights). 2.10 Uncontrolled Environment—Locations where there is the exposure of individuals who have no knowledge or control of their exposure. 3.0 References 3.1 S3AM-003-PR1 SH&E Training 3.2 S3AM-120-PR1 Radiation 3.3 S3AM-128-PR1 Medical Screening&Surveillance 3.4 S3AM-208-PR1 Personal Protective Equipment Non-Ionizing Radiation(S3AM-121-PR1) Revision 3 July 31,2019 PRINTED COPIES ARE UNCONTROLLED.CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 1 of 8