OSHA Disaster Site Worker cheat sheet

Hazard categories at disaster sites: physical (struck-by, caught-in, falls, electrical, heat/cold), chemical (CO, H2S, chlorine, asbestos, silica), biological (sewage, mold, bloodborne pathogens), ergonomic (manual lifting, repetitive tool use), and psychological (fatigue, stress).

Site characterization precedes entry: identify the event type (natural, structural collapse, hazmat release, wildfire, flood), building occupancy history, and utility status before assigning tasks.

Atmospheric hazards are often invisible and odorless; CO is a common cause of post-disaster poisoning from generators and pressure washers used indoors or in partially enclosed spaces.

Structural collapse zones include secondary collapse, unstable leaning walls, and unshored trenches; soil trench walls can fail without warning and require protective systems per 29 CFR 1926 Subpart P.

Electrical hazards after disasters include downed lines, backfed generators, and energized water; treat all conductors as energized until lockout/tagout and verification are completed.

Heat illness risk rises with PPE ensembles; recognize heat cramps, heat exhaustion, and heat stroke, and apply work/rest cycles and hydration per NIOSH guidance.

Hazard recognition is continuous: conduct periodic reassessments as conditions change (weather, demolition progress, new equipment) and document findings in the site safety and health plan.

Report and track near-misses and incidents; incident data informs hazard prioritization and control selection at the site.

PPE selection follows a hierarchy: eliminate or substitute the hazard, use engineering controls, then administrative controls, then PPE as the last line of defense.

Head protection: hard hats per ANSI/ISEA Z89.1; replace after impact or when the shell shows cracks, and inspect suspension systems regularly.

Eye and face protection: safety glasses with side shields, goggles, or face shields per ANSI/ISEA Z87.1; face shields alone do not substitute for safety glasses.

Hand protection must match the hazard: cut-resistant gloves for debris, chemical-resistant gloves selected by chemical compatibility charts, and insulated gloves for electrical work.

Foot protection: safety-toe boots with puncture-resistant soles for debris fields; chemical-resistant boots for wet or contaminated environments.

High-visibility apparel per ANSI/ISEA 107 improves worker visibility around heavy equipment; class selection depends on traffic speed and site conditions.

Hearing protection is required when noise exceeds 85 dBA as an 8-hour TWA; use earplugs or muffs with an appropriate noise reduction rating.

PPE training must cover when PPE is necessary, how to don and doff, limitations, and care/maintenance; defective PPE is removed from service.

Respirators are selected based on the contaminant, exposure limit, and assigned protection factor; atmosphere-supplying respirators are required for IDLH or oxygen-deficient atmospheres.

A written respiratory protection program per 29 CFR 1910.134 includes medical evaluation, fit testing, training, and respirator maintenance.

Fit testing is required annually and whenever a different respirator model or size is used; user seal checks are performed each time the respirator is donned.

Air-purifying respirators (APR) must not be used in atmospheres that are IDLH, oxygen deficient (below 19.5%), or unknown; use supplied-air or SCBA instead.

Air monitoring strategy: direct-reading instruments (PID, LEL, O2, CO, H2S) for immediate hazards, plus integrated sampling for contaminants such as asbestos, silica, and metals.

Calibrate direct-reading instruments per manufacturer instructions and record calibration; bump-test detectors before each use.

Oxygen monitoring: normal air is about 20.9% O2; readings below 19.5% indicate oxygen deficiency and require evacuation and reassessment.

Combustible gas indicators read in %LEL; readings at or above 10% LEL in a confined space require action per the entry program.

A site-specific safety and health plan (SSHP) is required for hazardous waste operations under 29 CFR 1910.120 and includes hazard analysis, PPE, monitoring, decontamination, and emergency response.

The Incident Command System (ICS) uses a common organizational structure: Incident Commander, Operations, Planning, Logistics, Finance/Administration, and Safety Officer.

The Site Safety and Health Officer (SSHO) has authority to stop work when imminent danger exists; stop-work authority must be documented and communicated.

The Incident Action Plan (IAP) is developed during the Planning cycle and operational periods (typically 12 or 24 hours); it documents objectives, assignments, and safety messages.

Workers have the right to refuse unsafe work and to report hazards without retaliation; the General Duty Clause (OSH Act Section 5(a)(1)) covers hazards without a specific standard.

Emergency action plans include evacuation routes, assembly areas, accountability, and communication methods; drills are conducted and documented.

Multi-employer worksite doctrine: controlling, creating, correcting, and exposing employers can each be cited for hazards on a shared site.

Communication and span of control: ICS recommends a span of control of three to seven subordinates per supervisor.

Decontamination prevents contaminant spread from the exclusion zone to the support zone; establish contamination reduction corridors with stations for gross, secondary, and final decon.

Decon methods include dry decon (brushing, vacuuming), wet decon (washing with detergent and water), and chemical decon; select based on contaminant and PPE.

Bloodborne pathogens program per 29 CFR 1910.1030 includes exposure control plan, universal precautions, HBV vaccination offer, PPE, and post-exposure evaluation.

Needlestick and sharps injuries require immediate washing, reporting, and medical evaluation; post-exposure prophylaxis decisions follow current public health guidance.

Medical surveillance and baseline exams are required for hazardous waste workers and respirator users; records are maintained and confidential.

Heat stress management: acclimatization, fluid replacement, work/rest schedules, and cooling measures; monitor workers for symptoms of heat illness.

Fatigue and mental health are recognized disaster worker hazards; fatigue impairs judgment and reaction time, and peer support programs reduce psychological impact.

Personal hygiene: wash hands before eating, drinking, or smoking; do not eat or drink in contaminated areas; change out of contaminated clothing before leaving the site.

Workers have the right to a safe workplace, to receive information about hazards, to receive training, and to file complaints with OSHA without retaliation.

Hazard communication (HazCom) per 29 CFR 1910.1200 requires labels, safety data sheets (SDS), and training on chemical hazards in the work area.

Training requirements for hazardous waste operations: 40-hour initial and 3-day supervised field experience for general site workers, with 8-hour annual refreshers.

Workers must know the location of the site safety and health plan, emergency contacts, first aid, and the nearest medical facility.

Recognize signs of heat illness, cold stress, and fatigue; report symptoms early and use the buddy system to monitor coworkers.

Report all injuries, illnesses, and near-misses; recordkeeping requirements under 29 CFR 1904 apply to covered employers.

Understand the difference between the exclusion zone, contamination reduction zone, and support zone, and follow zone entry and exit rules.

Personal protective equipment and monitoring are not substitutes for engineering and administrative controls; workers should participate in hazard assessments and job safety analyses.

The Incident Commander sets objectives and priorities; the Safety Officer advises on safety and has authority to halt unsafe operations.

Operations Section carries out tactical actions; Division/Group supervisors manage assigned resources and report to Operations.

Planning Section collects situation status, develops the IAP, and tracks resources; Logistics provides supplies, facilities, and services.

Unified Command is used when multiple agencies have jurisdiction or responsibility; agencies coordinate through a single set of objectives.

Resource typing and check-in: all responders check in at the Incident Command Post or staging area and are tracked through the resource unit.

Transfer of command is documented through a briefing that covers situation, objectives, assignments, and safety concerns.

Workers should know their supervisor in the ICS structure, the chain of command, and how to request additional resources.

After-action reviews and improvement plans capture lessons learned and are used to update plans and training.

Hazard recognition uses the hierarchy of controls: elimination, substitution, engineering controls, administrative controls, and PPE.

Job hazard analysis (JHA) breaks tasks into steps, identifies hazards for each step, and defines controls before work begins.

Confined space entry requires permit, atmospheric testing, attendant, and rescue plan per 29 CFR 1910.146; many disaster site spaces (manholes, tanks, pits) meet the definition.

Excavation and trench hazards: protective systems (sloping, shoring, shielding) required for trenches 5 feet or deeper; competent person inspections daily and after rain.

Fall protection is required at 6 feet or more in construction (29 CFR 1926 Subpart M); use guardrails, safety nets, or personal fall arrest systems.

Cranes and heavy equipment: exclusion zones, signal persons, and rigging inspections; never work under a suspended load.

Silica and asbestos exposure controls include wet methods, local exhaust ventilation, and respiratory protection; monitor exposure and use engineering controls first.

Housekeeping and access control: keep walkways clear, control site access, and secure hazardous areas with barricades and signage.

Hazard assessment for respiratory protection includes contaminant identity, concentration, exposure limits, and oxygen level.

Assigned protection factors (APF) determine the maximum use concentration: half-mask APR APF 10, full-face APR APF 50, supplied-air with full facepiece APF 50 to 1000 depending on mode, SCBA APF 10,000.

IDLH atmospheres require SCBA or supplied-air with escape bottle; APRs are prohibited.

Fit test methods: qualitative (saccharin, Bitrex, irritant smoke) and quantitative (portacount); record fit test results and retain per 1910.134.

Air monitoring instruments: photoionization detector (PID) for VOCs, flame ionization detector (FID), colorimetric tubes, and detector tubes for specific gases.

Monitoring frequency increases when operations generate dust or vapors (demolition, cutting, grinding); document results and adjust controls.

Respirator cartridge change schedules are based on contaminant, concentration, and use conditions; do not rely on odor or taste as a warning.

Medical evaluation is required before fit testing and respirator use; a physician or licensed health care professional determines fitness.

The SSHP is a living document; update it when site conditions, tasks, or hazards change, and communicate changes to workers.

The plan includes site description, hazard assessment, PPE, air monitoring, decon, medical surveillance, emergency response, and training.

Incident Command integrates safety through the Safety Officer, who reviews the IAP and conducts site safety assessments.

The IAP includes the safety message and medical plan; workers receive a briefing at the start of each operational period.

Emergency response planning includes medical evacuation routes, hospital locations, and communication protocols.

Site control: establish exclusion, contamination reduction, and support zones; control access points and log entry/exit.

Documentation includes daily safety reports, monitoring records, training records, and incident reports.

Coordination with local emergency responders and public health authorities is part of the plan and is exercised through drills.

Decontamination stations: tool drop, gross decon, secondary decon, and final decon; contaminated water and materials are contained and disposed of properly.

PPE doffing order: remove outer gloves, then suit, then inner gloves, then respirator, then inner gloves; avoid cross-contamination.

Bloodborne pathogens exposure control plan includes universal precautions, engineering controls (sharps containers), and PPE.

Hepatitis B vaccination must be offered within 10 working days of initial assignment to workers with occupational exposure.

Post-exposure evaluation and follow-up are provided at no cost to the worker; confidentiality of medical records is maintained.

Sharps and needlestick injuries are common in disaster debris; use puncture-resistant gloves and tools, and never compress trash bags by hand.

Decon wastewater and disposable PPE are managed as contaminated waste per applicable regulations.

Training on bloodborne pathogens is required at initial assignment and annually thereafter.

Workers must be trained on site-specific hazards, PPE, emergency procedures, and their rights before beginning work.

The right to know includes access to SDS and hazard information; the right to participate includes reporting hazards and participating in inspections.

Heat and cold stress: monitor weather, use buddy system, and provide fluids and rest; recognize symptoms and act early.

Fatigue management: limit consecutive work hours, provide rest breaks, and monitor for impaired judgment.

Mental health support: disaster workers face stress, trauma exposure, and grief; peer support and EAP resources are available.

Report injuries and illnesses promptly; workers' compensation and return-to-work programs apply.

Personal hygiene: wash hands, avoid eating in contaminated areas, and shower after shift when exposed to contaminants.

Workers should know how to stop work when they believe a condition is unsafe and how to report it without retaliation.

Pre-entry hazard assessment includes historical site use, building occupancy, utility maps, and event-specific hazards.

Initial site survey identifies physical, chemical, biological, and psychological hazards; results inform the SSHP.

Continuous monitoring and reassessment are required as demolition and debris removal progress.

Use air monitoring and direct-reading instruments to verify control effectiveness and detect changing conditions.

Document hazards and controls in the JHA and communicate through daily briefings.

Coordinate with utility companies to de-energize and lock out services before entry.

Establish exclusion zones around unstable structures, and use engineering controls such as shoring and bracing.

Report and investigate near-misses to identify root causes and prevent recurrence.

PPE selection is based on hazard assessment and exposure potential; PPE is the last line of defense.

Chemical-resistant gloves are selected using manufacturer compatibility charts for the specific chemical and duration of contact.

Respirator selection considers APF, contaminant, and oxygen level; SCBA for IDLH.

Protective clothing levels: Level A (fully encapsulating, SCBA), Level B (SCBA, chemical-resistant clothing), Level C (APR, chemical-resistant clothing), Level D (work clothing).

Inspect PPE before each use; remove damaged equipment from service.

Training includes donning, doffing, limitations, and maintenance.

Fit testing and user seal checks are required for tight-fitting respirators.

High-visibility clothing and hearing protection are selected based on site conditions and noise exposure.

Written respiratory protection program includes procedures, medical evaluation, fit testing, training, and maintenance.

Air monitoring uses direct-reading instruments and integrated sampling; calibrate and bump-test instruments.

Oxygen deficiency below 19.5% requires evacuation and supplied-air respirators.

Combustible gas readings at or above 10% LEL require action and reassessment.

IDLH atmospheres require SCBA or supplied-air with escape bottle.

Cartridge change schedules are based on contaminant and exposure conditions.

Medical evaluation is required before fit testing and use.

Record monitoring results and fit test records; retain per regulations.

ICS structure: Incident Commander, Operations, Planning, Logistics, Finance/Administration, and Safety Officer.

Safety Officer has authority to stop unsafe work and advises the IC.

IAP is developed for each operational period and includes objectives, assignments, and safety message.

Unified Command coordinates multiple agencies with jurisdiction.

Check-in and resource tracking occur at the Incident Command Post or staging area.

Transfer of command is documented through a briefing.

Workers know their supervisor, chain of command, and how to request resources.

After-action reviews capture lessons learned and improve future response.

Decon prevents contaminant spread; establish contamination reduction corridors.

Decon methods: dry, wet, and chemical; select based on contaminant and PPE.

Bloodborne pathogens program includes exposure control plan, universal precautions, HBV vaccination, and post-exposure evaluation.

Sharps injuries require immediate washing, reporting, and medical evaluation.

PPE doffing order avoids cross-contamination.

Contaminated waste and wastewater are managed per regulations.

Training is required initially and annually.

Personal hygiene reduces exposure risk.

Workers have the right to a safe workplace, hazard information, training, and to file complaints without retaliation.

HazCom requires labels, SDS, and training.

HAZWOPER training: 40-hour initial and 3-day supervised field experience, with 8-hour annual refresher for general site workers.

Know emergency contacts, first aid, and medical facility locations.

Recognize heat illness, cold stress, and fatigue; use the buddy system.

Report injuries, illnesses, and near-misses.

Understand zone entry and exit rules.

Participate in hazard assessments and JSAs.