OSHA 15-Hr Disaster Site Worker cheat sheet

Disaster sites differ from routine construction sites: hazards are unidentified, unstable, and changing, so the site must be re-evaluated at the start of each shift and after any aftershock, fire, or weather event.

The Incident Command System (ICS) organizes the response; the Safety Officer and Incident Safety Officer have authority to halt unsafe work, and workers must know who holds that role on their site.

Structural hazards after earthquakes, floods, or explosions include unreinforced masonry, pancaked floors, leaning walls, and hanging debris; do not enter buildings until cleared by a structural specialist.

Utility hazards: assume all downed lines are energized, maintain at least 10 feet from overhead lines up to 50 kV (more above that), and call the utility for gas leaks rather than attempting shutoff without training.

Hazard categories on disaster sites: electrical, structural collapse, heavy equipment, fire and explosion, hazardous materials, confined spaces, heat and cold stress, biological hazards, and psychological stress.

Heat illness prevention: water, rest, shade; acclimatize new workers gradually; know that heat stroke is a medical emergency requiring immediate cooling and 911 call.

Fatigue and stress are recognized hazards; long shifts increase error rates, and critical incident stress symptoms (sleep loss, irritability, intrusive thoughts) should be reported to a supervisor.

A Job Hazard Analysis (JHA) or activity hazard analysis identifies task steps, hazards, and controls before work begins; the Site Safety and Health Plan documents these controls.

PPE selection follows a hazard assessment; the employer must certify a written hazard assessment and verify worker training on PPE use and limitations.

Head protection: OSHA-compliant hard hats (ANSI Z89.1) with chin straps for work at heights or in high-wind areas; replace helmets that have taken a significant impact.

Eye and face protection: safety glasses with side shields for general debris, goggles for chemical splash, and full face shields over goggles for cutting or chipping tasks.

Hand protection selection: cut-resistant gloves for rebar and glass, chemical-resistant gloves matched to the specific chemical (nitrile, butyl, Viton), and leather gloves for welding.

Foot protection: steel or composite toe and puncture-resistant soles; rubber boots for standing water and wet decontamination lines.

High-visibility apparel (ANSI/ISEA 107) is required where vehicles or heavy equipment operate or where workers are exposed to traffic.

Hearing protection is required when noise exceeds 85 dBA as an 8-hour time-weighted average; use earplugs or muffs and verify fit.

Respirators and fall protection are PPE but have separate standards; fall protection is required at 4 feet in general industry and 6 feet in construction.

Employer must have a written respiratory protection program with a program administrator, medical evaluation, fit testing, training, and maintenance.

Air-purifying respirators (APR) require a cartridge or filter specific to the contaminant; they cannot be used in oxygen-deficient atmospheres (below 19.5% O2) or IDLH conditions.

Supplied-air respirators (SAR) and self-contained breathing apparatus (SCBA) are required where oxygen is deficient, contaminants are unknown, or concentrations are IDLH.

Respirator selection follows assigned protection factors (APF): half-mask APR APF 10, full-face APR APF 50, full-face SAR in pressure-demand mode APF 1,000, SCBA APF 10,000.

Fit testing is required annually and before first use; qualitative fit testing uses taste or irritant agents, quantitative uses instruments; a user seal check is performed each time the respirator is donned.

Air monitoring strategy: initial monitoring to characterize the hazard, then periodic and personal monitoring; direct-reading instruments (PID, LEL meter, colorimetric tubes) give immediate results.

Combustible gas meters read percent LEL; oxygen meters read percent O2; both are used in confined-space entry; a reading of 0% LEL does not mean the atmosphere is safe for health.

Respirator cartridges must be changed on a schedule based on use conditions or when breakthrough, odor, or increased breathing resistance occurs.

Hazard Communication (HazCom) requires chemical manufacturers to provide Safety Data Sheets (SDS) and labels with pictograms, signal words, and hazard statements.

SDS has 16 sections; Section 2 lists hazards, Section 4 first aid, Section 8 exposure controls, and Section 9 physical properties.

Labels use the GHS pictograms, signal words (Danger or Warning), and precautionary statements; workers must know where SDSs are kept and how to access them.

Exposure limits: OSHA Permissible Exposure Limits (PELs) are legal limits; NIOSH RELs and ACGIH TLVs are often lower and more protective.

Asbestos and lead are common disaster-site contaminants: asbestos in older building debris and lead in paint dust; both require specific work practices, air monitoring, and medical surveillance.

Silica exposure from cutting concrete, masonry, or stone is controlled with water suppression or local exhaust ventilation and respiratory protection.

Carbon monoxide from generators and equipment is a colorless, odorless hazard; never operate fuel-burning equipment indoors or in enclosed spaces.

Chemical exposure routes are inhalation, skin absorption, ingestion, and injection; decontamination and handwashing before eating are primary controls.

Site control zones: the Hot Zone (exclusion zone) where contamination exists, the Warm Zone (contamination reduction zone) where decontamination occurs, and the Cold Zone (support zone) where clean operations are conducted.

The Contamination Reduction Corridor (CRC) is the path through the warm zone where decontamination steps are performed in sequence before entering the cold zone.

Decontamination order: gross decontamination, then washing with soap and water, then rinse, then drying; remove PPE in a sequence that avoids self-contamination.

Confined space entry requires an entry permit, atmospheric testing, attendant, entrant, and rescue plan; permit-required spaces are those with hazardous atmospheres, engulfment, or configuration hazards.

Excavation and trench safety: protective systems (sloping, shoring, shielding) are required for trenches 5 feet deep or more; spoils and equipment are kept at least 2 feet from the edge.

Heavy equipment: only trained operators; spotters are used for backing; workers stay out of the swing radius of cranes and excavators.

Lockout/tagout (LOTO) controls hazardous energy during repair or maintenance; verify zero energy state before work begins.

Emergency action plan: know exit routes, assembly points, alarm signals, and who to notify; report all injuries and near misses immediately.

Disaster sites differ from routine construction sites: hazards are unidentified, unstable, and changing, so the site must be re-evaluated at the start of each shift and after any aftershock, fire, or weather event.

The Incident Command System (ICS) organizes the response; the Safety Officer and Incident Safety Officer have authority to halt unsafe work, and workers must know who holds that role on their site.

Structural hazards after earthquakes, floods, or explosions include unreinforced masonry, pancaked floors, leaning walls, and hanging debris; do not enter buildings until cleared by a structural specialist.

Utility hazards: assume all downed lines are energized, maintain at least 10 feet from overhead lines up to 50 kV (more above that), and call the utility for gas leaks rather than attempting shutoff without training.

Hazard categories on disaster sites: electrical, structural collapse, heavy equipment, fire and explosion, hazardous materials, confined spaces, heat and cold stress, biological hazards, and psychological stress.

Heat illness prevention: water, rest, shade; acclimatize new workers gradually; know that heat stroke is a medical emergency requiring immediate cooling and 911 call.

Fatigue and stress are recognized hazards; long shifts increase error rates, and critical incident stress symptoms (sleep loss, irritability, intrusive thoughts) should be reported to a supervisor.

A Job Hazard Analysis (JHA) or activity hazard analysis identifies task steps, hazards, and controls before work begins; the Site Safety and Health Plan documents these controls.

PPE selection follows a hazard assessment; the employer must certify a written hazard assessment and verify worker training on PPE use and limitations.

Head protection: OSHA-compliant hard hats (ANSI Z89.1) with chin straps for work at heights or in high-wind areas; replace helmets that have taken a significant impact.

Eye and face protection: safety glasses with side shields for general debris, goggles for chemical splash, and full face shields over goggles for cutting or chipping tasks.

Hand protection selection: cut-resistant gloves for rebar and glass, chemical-resistant gloves matched to the specific chemical (nitrile, butyl, Viton), and leather gloves for welding.

Foot protection: steel or composite toe and puncture-resistant soles; rubber boots for standing water and wet decontamination lines.

High-visibility apparel (ANSI/ISEA 107) is required where vehicles or heavy equipment operate or where workers are exposed to traffic.

Hearing protection is required when noise exceeds 85 dBA as an 8-hour time-weighted average; use earplugs or muffs and verify fit.

Respirators and fall protection are PPE but have separate standards; fall protection is required at 4 feet in general industry and 6 feet in construction.

Employer must have a written respiratory protection program with a program administrator, medical evaluation, fit testing, training, and maintenance.

Air-purifying respirators (APR) require a cartridge or filter specific to the contaminant; they cannot be used in oxygen-deficient atmospheres (below 19.5% O2) or IDLH conditions.

Supplied-air respirators (SAR) and self-contained breathing apparatus (SCBA) are required where oxygen is deficient, contaminants are unknown, or concentrations are IDLH.

Respirator selection follows assigned protection factors (APF): half-mask APR APF 10, full-face APR APF 50, full-face SAR in pressure-demand mode APF 1,000, SCBA APF 10,000.

Fit testing is required annually and before first use; qualitative fit testing uses taste or irritant agents, quantitative uses instruments; a user seal check is performed each time the respirator is donned.

Air monitoring strategy: initial monitoring to characterize the hazard, then periodic and personal monitoring; direct-reading instruments (PID, LEL meter, colorimetric tubes) give immediate results.

Combustible gas meters read percent LEL; oxygen meters read percent O2; both are used in confined-space entry; a reading of 0% LEL does not mean the atmosphere is safe for health.

Respirator cartridges must be changed on a schedule based on use conditions or when breakthrough, odor, or increased breathing resistance occurs.

Hazard Communication (HazCom) requires chemical manufacturers to provide Safety Data Sheets (SDS) and labels with pictograms, signal words, and hazard statements.

SDS has 16 sections; Section 2 lists hazards, Section 4 first aid, Section 8 exposure controls, and Section 9 physical properties.

Labels use the GHS pictograms, signal words (Danger or Warning), and precautionary statements; workers must know where SDSs are kept and how to access them.

Exposure limits: OSHA Permissible Exposure Limits (PELs) are legal limits; NIOSH RELs and ACGIH TLVs are often lower and more protective.

Asbestos and lead are common disaster-site contaminants: asbestos in older building debris and lead in paint dust; both require specific work practices, air monitoring, and medical surveillance.

Silica exposure from cutting concrete, masonry, or stone is controlled with water suppression or local exhaust ventilation and respiratory protection.

Carbon monoxide from generators and equipment is a colorless, odorless hazard; never operate fuel-burning equipment indoors or in enclosed spaces.

Chemical exposure routes are inhalation, skin absorption, ingestion, and injection; decontamination and handwashing before eating are primary controls.

Site control zones: the Hot Zone (exclusion zone) where contamination exists, the Warm Zone (contamination reduction zone) where decontamination occurs, and the Cold Zone (support zone) where clean operations are conducted.

The Contamination Reduction Corridor (CRC) is the path through the warm zone where decontamination steps are performed in sequence before entering the cold zone.

Decontamination order: gross decontamination, then washing with soap and water, then rinse, then drying; remove PPE in a sequence that avoids self-contamination.

Confined space entry requires an entry permit, atmospheric testing, attendant, entrant, and rescue plan; permit-required spaces are those with hazardous atmospheres, engulfment, or configuration hazards.

Excavation and trench safety: protective systems (sloping, shoring, shielding) are required for trenches 5 feet deep or more; spoils and equipment are kept at least 2 feet from the edge.

Heavy equipment: only trained operators; spotters are used for backing; workers stay out of the swing radius of cranes and excavators.

Lockout/tagout (LOTO) controls hazardous energy during repair or maintenance; verify zero energy state before work begins.

Emergency action plan: know exit routes, assembly points, alarm signals, and who to notify; report all injuries and near misses immediately.