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AECOM • Managers may implement alternative procedures to prevent arc flash and electrical contact. These procedures shall be identified by the Overhead Electrical Line Owner/Operator or a registered Professional Engineer who is a Qualified Person with respect to electrical power transmission and distribution. • A planning meeting with the Manager, SH&E Manager and the Overhead Electrical Line Owner/Operator(or registered Professional Engineer)shall be held to determine the most effective alternative procedures. • Alternative procedures shall meet all client, local and governmental regulatory requirements. • The work will be conducted by qualified and competent individuals,following the alternative written safe work procedures. All others are restricted from entering the MAD. • Insulating Barriers shall be rated for the voltage line being guarded. These barriers may not be part of or attached to the equipment.The MAD shall only be reduced within the designed working dimensions of the insulating barrier.This determination shall be made by a Qualified Person in accordance with local or governmental requirements for work practices near energized equipment. • Consult S3AM-302-PR1 Electrical Safety procedures to properly ground equipment and for limitations of grounding. • Dedicated Line Spotters shall be trained to enable them to effectively perform their task, including training on the applicable local and governmental regulations. • No work that encroaches on an energized power line will be completed outside of daylight hours. 4.5 Additional Safety Measures. 4.5.1 When equipment shall repeatedly travel beneath electric power lines, a route shall be plainly marked and"rider poles"of non-conductive material shall be erected on each side to confirm equipment structures are lowered into a safe position. • 20"X 28"(50.8cm X 71.12cm)Danger Overhead Power Lines signs, which are highly visible, shall be erected at a height of 1.8 meters(6ft)on each side of the electrical line.A combination of pylons and high visibility tape shall be placed underneath the electrical line. • These signs shall be in plain view of equipment traveling in either direction, but no closer than the MAD. • If physical guards(i.e. goal posts, rider poles)are used,the guards shall be of non-conductive material and consist of a pole on each side of the approach connected by a rope. • The poles will be placed at the MAD from and on each side of the electrical line. The ropes will be set at a height, which will maintain the MAD from the electrical line. 4.5.2 Watch for uneven ground that may cause vehicles and equipment to weave, bob, or bounce. 4.5.3 The following additional safety measures shall be implemented as needed when working around energized power lines: • Provide equipment with proximity warning devices. These provide an audible alarm if any part of the equipment gets too close to a line. • Install ground safety stops. These prevent vehicles from accidentally entering hazardous areas. • Equip cranes with a boom-cage guard. This prevents the boom from becoming energized if an electrical line is contacted. Overhead Lines&Obstructions(S3AM-322-PR1) Revision 3 July 31,2019 PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 7 of 8