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AECOM • Inform all job site personnel of the danger zone and the safe distances required. • Beware of atmospheric conditions, such as temperature, humidity, and wind that may dictate more stringent safety procedures. 4.3.16 If employees are to climb or perform work on poles or towers, the structures shall be confirmed as capable of withstanding the weight and activity without failure. 4.3.17 If holes are dug for poles or foundations for structures, appropriate measures shall be taken to prevent inadvertent entry by personnel or equipment. Refer to S3AM-303-PR1 Excavation. 4.3.18 Operation of heavy equipment and cranes in areas with overhead lines represents a significant arc flash and electrical hazard to all personnel on the job site. • Accidental contact with an energized overhead line or arcing between a high power line and grounded equipment, can cause harm to nearby equipment operators or ground personnel and damage to power transmission systems and/or operating equipment. • Equipment will be repositioned and blocked so that no part, including cables, can come within the established minimum clearances. 4.3.19 Gravel trucks, cranes, boom trucks, etc. shall retract, stow and lower boxes, outriggers, booms, etc. to the travel position prior to entering municipal and client owned roads(e.g. leaving plant sites, work over rig sites, battery sites, and storage yards)and any time travel may put the equipment within the MAD of an electrical line. 4.3.20 When a signal person is required,the individual shall wear reflective striping (coveralls or vest)and carry an air horn or other appropriate means of emergency communication. 4.3.21 The signal person shall be aware of the potential electrical line hazards, be verified as competent by their supervisor and not have any other duties while acting as the signal person. 4.3.22 The signal person shall remain outside the MAD and in a position that allows for monitoring of equipment or loads to prevent encroachment on the MAD. 4.3.23 Signs, pylons, high visibility tape and/or signalers shall not be removed until the last piece of AECOM equipment has traveled under the overhead electrical line. 4.4 Minimum Approach Distance (MAD) Reduction 4.4.1 Where any work task will not allow the MAD to be maintained, an alternate means of protection shall be implemented by the Manager and approved by the SH&E Manager. In order of preference, acceptable procedures are: • De-energize the overhead line(s)/lockout by local utility authorities; or • Implement alternative procedures as identified by the Overhead Electrical Line Owner/ Operator or a registered professional engineer. 4.4.2 De-energize Overhead Lines • Elimination of electrical power provides the most acceptable means of ensuring safety of personnel. While temporary site overhead lines are often under the control of the site manager (and can be de-energized locally), electrical distribution and transmission lines can be de- energized only by the Overhead Electrical Line Owner/Operator. De-energizing of an overhead line often requires advance coordination with the Overhead Electrical Line Owner/ Operator.At least one week advance notice should be provided. • Managers shall confirm with the utility Overhead Electrical Line Owner/Operator that the overhead line has been de-energized and visibly grounded at the job site. 4.4.3 Alternative Procedures Overhead Lines&Obstructions(S3AM-322-PR1) Revision 3 July 31,2019 PRINTED COPIES ARE UNCONTROLLED. CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 6 of 8