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WORK WITHIN'APPROACH ❑Prepare project-specific written"Electrical Safety Program"addressing(at a minimum):
<br /> BOUNDARY"OF EXPOSED, Workers trained/designated as"Qualified Electrical Workers"per NFPA 70E(US)/CSA Z462(CAN)
<br /> ENERGIZED(OR POTENTIALLY Assess risks of electrical shock(voltage levels and sources),arc flash hazard and secondary hazards.
<br /> ENERGIZED)CONDUCTORS AND/OR Affix electrical hazard warning label to electrical enclosure(s)to be accessed.
<br /> CIRCUIT PARTS CONNECTED TO Physically delineate arc flash-or limited approach boundary,whichever is farthest from hazard source.
<br /> POWER SOURCE 50-600 V*: Only"qualified"workers allowed within approach boundaries;prevent entry by non-qualified personnel.
<br /> ❑AC ❑DC ❑3-phase Establish electrically safe working condition;work on live circuits prohibited(except for diagnostic testing).
<br /> ❑Battery and/or solar power Use PPE for shock/arc flash protection,as required.
<br /> ❑Capacitor(s) Use other safe procedures/equipment required for the task,such as lockout/tagout.
<br /> ❑Induced voltage
<br /> ❑Stray voltage>50V from soil
<br /> electrodes '
<br /> *Working on>600 V not permitted
<br /> for Geosyntec personnel j
<br /> LOCKOUT/TAGOUT(LO/TO)OF i ❑Prepare site-specific written LO/To program,and equipment-specific written LO/TO procedures(as
<br /> ELECTRICAL ENERGY To prevent applicable);implement control procedures for hazardous energy sources,provide locks/tags,train workers,
<br /> i unplanned start-up or release of designate"authorized"personnel,notify"affected"personnel.
<br /> energy when equipment is under
<br /> maintenance/repair.
<br /> WARNINGI Confirmed or possible ❑Follow safe work practices per D.11."Utility-Related Hazards."
<br /> close proximity to OVERHEAD
<br /> ELECTRICAL UTILITY LINES.
<br /> HSE Program Documents:HSE SOP-434o:Overhead and Underground Utility Hazards(US-only),
<br /> HSE SOP-451a:Lock out/Tap-out(North America only) HSE SOP-454a:General Electrical Safety(US only)
<br /> D.11. UTILITY-RELATED HAZARDS ®Applicable [] Not Applicable, Not Anticipated
<br /> Site-Specific Notes&Clarifications: Potential underground utilities have been cleared and private utility locate(Subtronic)at each of the 2 boring locations.
<br /> OVERHEAD,ABOVE-GROUND ❑Do not cross approach boundaries with personnel or equipment;employ other appropriate precautions for
<br /> UTILITIES the conditions(specify above).
<br /> ❑Use additional controls,as applicable:shielding,flagging,observer/monitor,or,
<br /> ❑Arrange for power company/utility owner to de-energize power line.
<br /> ® i. UNDERGROUND UTILITIES I ®Confirm appropriate underground utility clearance procedures have been completed priorto ground
<br /> penetrations,and employ other utility clearance/locator practices,as appropriate for conditions.
<br /> ❑Hand digging/augering or vacuum post-holing within 3'of utility locations or other high-risk condition.
<br /> HSE Program Documents:HSE SOP-434a:Overhead and Underground Utility Hazards(US-only)
<br /> D.12. CONFINED/ENCLOSED SPACES(Including Hazardous Indoor Spaces) ❑Applicable 5J Not Applicable, Not Anticipated
<br /> Site-Specific Notes&Clarifications: �I
<br /> I
<br /> Type of CONFINED/ENCLOSED/ REQUIREMENTS:
<br /> HAZARDOUS INDOOR Workspace: 1. Contact Corp.HSE Department will determine applicability of confined space entry regulations,and to
<br /> `.J Indoors(occupied) determine safe work practices for entry into any confined,enclosed or hazardous indoor spaces.
<br /> ❑Indoors(abandoned,vacant)
<br /> ❑Basement,crawl space,attic 2. Classify the work task by checking one of the following:
<br /> j ❑Tunnel,shaft,inspection gallery I
<br /> ❑CONFINED SPACE classified by regulatory authority as a"Permit-Required Confined Space"or otherwise
<br /> El Storage bin,locker !
<br /> El Culvert,catch basin,sewer specifically-regulated as a confined space in the worksite's geographic jurisdiction.
<br /> I
<br /> ❑Well vault,utility vault,manhole j ❑CONFINED/ENCLOSED/INDOOR space NOT specifically regulated as a Confined Space;develop site-
<br /> El Tank,vessel,silo,vat,hopper specific entry procedure per applicable regulatory and Geosyntec safety requirements.
<br /> ❑Trench,excavation
<br /> ❑Machine/equipment pit i 3. Delineate tasks,hazards and controls associated with the work in Section C.1."Summary of Tasks,Hazards
<br /> ❑Transportation container,railcar I and Controls,"and in applicable sections in Parts C,D and E of this THA;incorporate or attach applicable
<br /> I ❑Other—describe above safety provisions such as,but not limited to,the following:
<br /> • Risk assessment;entry plan,entry permit system/safety checklist.
<br /> f Confirmed or potential hazards: . Air monitoring for atmospheric hazards.
<br /> ❑Flammable/explosive • Entry roles(supervisor,entrant,attendant),buddy system,regulatory training requirement.
<br /> ❑Oxygen deficiency . Protect non-entry personnel from unauthorized entry(labels,signage,barriers)
<br /> ❑Hydrogen sulfide • Ingress/egress(stairway,ramp,ladder,tripod/winch,harness/lifeline,etc.).
<br /> € ❑VOCs • Communication/alerting/rescue/emergency plan.
<br /> ❑Carbon monoxide • Entry hazard controls:
<br /> i ❑Combustible dust - Isolate,clean,purge,inert,lockout/tagout,fire prevention.
<br /> ❑Combustion/exhaust emissions - Dilution ventilation to introduce fresh air
<br /> ❑Welding/cutting fumes - Exhaust ventilation to control point source of emissions.
<br /> Project/Task Name:TR0712/Replacement of Monitoring Wells THA ver.4.0
<br /> Geosyntec c' THA Date:6/26/2025 Page 14
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