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El HANDS-ON DIAGNOSTICS/REPAIR ON El implement electrical safe work practices pertaining to: CIRCUIT(S)CONNECTED TO POWER ! • Workers trained appropriately for the task. SOURCE<50 V: • Shock prevention measures. ❑AC ❑DC • Eye/skin protection for arcing hazards. ❑Battery and/or solar power • Protection from secondary hazards. ❑Capacitor(s) ❑Stray voltage from soil electrodes El WORK WITHIN'APPROACH ! El Prepare project specific written"Electrical Safety Program"addressing(at a minimum): BOUNDARY"OF EXPOSED, ! • Workers trained/designated as"Qualified Electrical Workers"per NFPA 70E(US)/CSA Z462(CAN) ENERGIZED(OR POTENTIALLY • Assess risks of electrical shock(voltage levels and sources),arc flash hazard and secondary hazards. ENERGIZED)CONDUCTORS AND/OR . Affix electrical hazard warning label to electrical enclosure(s)to be accessed. CIRCUIT PARTS CONNECTED TO • Physically delineate arc flash-or limited approach boundary,whichever is farthest from hazard source. POWER SOURCE 50-600 V*: . Only"qualified"workers allowed within approach boundaries;prevent entry by non-qualified personnel. ❑AC ❑DC ❑3-phase • Establish electrically safe working condition;work on live circuits prohibited(except for diagnostic testing). ❑Battery and/or solar power • Use PPE for shock/arc flash protection,as required. ❑Capacitor(s) • Use other safe procedures/equipment required for the task,such as lockout/tagout. ❑Induced voltage ❑Stray voltage>50V from soil electrodes *Working on>600 V not permitted for Geosyntec personnel LOCKOUT/TAGOUT(LO/TO)OF ❑Prepare site-specific written LO/TO program,and equipment-specific written LO/TO procedures(as ELECTRICAL ENERGY To prevent applicable);implement control procedures for hazardous energy sources,provide locks/tags,train workers, unplanned start-up or release of designate"authorized"personnel,notify"affected"personnel. energy when equipment is under maintenance/repair. WARNING! Confirmed or possible ®Follow safe work practices per D.11."Utility-Related Hazards." close proximity to OVERHEAD ELECTRICAL UTILITY LINES. HSE Program Documents:HSE SOP-434a:Overhead and Underground Utility Hazards(US-only). HSE SOP-452a:Lock-out/Tag-out(North America-only) HSE SOP-4540:General Electrical Safetv(US-only) D.11. UTILITY-RELATED HAZARDS ® Applicable ❑ Not Applicable, Not Anticipated Site-Specific Notes&Clarifications: A private utility locator will mark utilities around the four proposed well locations.The drilling subcontractor will hand auger to 5 feet bgs at each well location. ® OVERHEAD,ABOVE-GROUND E M Do not cross approach boundaries with personnel or equipment;employ other appropriate precautions for UTILITIES the conditions(specify above). ❑Use additional controls,as applicable:shielding,flagging,observer/monitor,or, ❑Arrange for power company/utility owner to de-energize power line. ® UNDERGROUND UTILITIES ®Confirm appropriate underground utility clearance procedures have been completed prior to ground penetrations,and employ other utility clearance/locator practices,as appropriate for conditions. ®Hand digging/augering or vacuum post-holing within 3'of utility locations or other high-risk condition. HSE Program Documents:HSE SOP-434a:Overhead and Underground Utility Hazards(US-only) D.12. CONFINED/ENCLOSED SPACES(Including Hazardous Indoor Spaces) ❑ Applicable ® Not Applicable, Not Anticipated D.13. INFECTIOUS I PATHOGENIC BIOHAZARDS ® Applicable ❑ Not Applicable, Not Anticipated D.14. COMMERCIAL CHEMICAL PRODUCTS(per HAZCOM or WHMIS) ® Applicable ❑ Not Applicable, Not Anticipated Site-Specific Notes&Clarifications: Decon solution for drilling equipment.PID calibration gas(100ppm isobutylene). ® PRODUCTS REGULATED BY E ®Safety Data Sheets(SDSs)available,either on site or readily available within same work shift,containers HAZCOM'(US)or WHMISZ(CAN) labelled properly,workers trained/oriented on hazards. ®For subcontractor/contractor use of chemical products,confirm SDS availability for affected onsite workers. ------------------------------------------------------------------=------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 'OSHA Hazard Communication Standard(United States);z Workplace Hazardous Material Information System(Canada) ® GENERAL SAFE WORK PRACTICES E M Consult SDS for HSE hazards,symptoms of exposure;ensure workers have been apprised of safe practices. FOR FIELD USE OF CHEMICALS M Handle with care,maintain good housekeeping,provide adequate illumination in work area. E M Pour/dispense/transfer liquid chemicals on stable work surface. M Use chemicals in well-ventilated area;use fans/blowers/exhaust for active ventilation,as appropriate. E M Have eyewash bottles,eyewash station,deluge capabilities,commensurate for the hazard,readily available. E ❑Have spill/neutralization equipment,appropriate for the chemicals,readily available. E ❑Conduct air monitoring as appropriate;see Part E,"Air Monitoring,Worker Exposure Monitoring." Co eosyntec Project/Task Name:Well Install,Development,and Destruction THA ver. Consultants THA Date: 04/17/2025 Page 12