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A=COM • Medium power lasers; • MPE is exceeded more than 5 times. Skin MPE is not generally exceeded, except at focus; • Nominal Hazard Zone: hazard area for the eye, none for the skin. 4.3.15 Class 4 Lasers • Dangerous, Personal Protective Equipment(PPE)for eyes and skin shall be worn within the nominal hazard zone. Class 4 lasers are fire hazards as well. Diffuse reflections may be hazardous; • High power lasers; • Ocular and skin MPE are exceeded. Diffuse reflections exceed the MPE; • Nominal Hazard Zone: hazard area for the eye and for the skin. 4.4 Radiofrequency Radiation Protection 4.4.1 Reduction in radiofrequency(RF)exposures can be accomplished through the implementation of appropriate administrative,work practice and engineering controls. Should routine occupational RF exposures be part of a project, a suitable plan shall be developed such as an NIRPP. 4.4.2 Generally, where RF emitters are identified, employees will: • Remain outside any demarcated area where an RF hazard exists; • Remain within the General Public exposure region; • If the preceding requirements cannot be met or determined,AECOM will obtain a hazard assessment from the emitter's operator for controlling entity and provide it to the SH&E Manager for evaluation and determination of the relevant hazard mitigation measures. 4.4.3 If the above information is not available, an RF emitter survey will be required to assess the potential exposure hazards.An RF emitter survey shall be performed by an individual trained to effectively assess RF exposures. 4.4.4 Unless using an RF meter under the direction of an individual trained to effectively assess RF exposures, employees will not enter any area which is located within the RF hazard distance identified by the RF emitter survey.AECOM personal may enter a controlled area if the emitter has been de-energized and locked-out using standard Lockout/Tagout procedures in accordance with S3AM-325-PR1 Lockout Tagout. 4.5 Infrared Radiation Protection 4.5.1 Infrared (IR)radiation may be encountered during furnace operations, pouring, casting, hot dipping, laser and high-intensity light sources, curing, annealing and plastic welding. 4.5.2 Performance of welding and oxygen/acetylene cutting operations(torch cutting, brazing,welding) involves the use of an exposed high-temperature flame.This flame produces infrared (IR)radiation and UV radiation at the welding location which can cause cataracts, skin cancer, and thermal burns to the welder or other persons located nearby. 4.5.3 Skin Protection • Long sleeve,flame-resistant shirts and/or forearm length Nomex gloves will be worn; • Leather welder's apron or equivalent protection; • Long pants shall be worn during any hot work task; • Welding screens shall be utilized where feasible to protect the general public or other unprotected employees. 4.5.4 Eye Protection • A welder's helmet or goggles with the appropriate lens shade will be worn. Refer to Non-Ionizing Radiation(S3AM-121-PR1) Revision 3 July 31,2019 PRINTED COPIES ARE UNCONTROLLED.CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 5 of 8