Safety, Environmental, and Regulatory Compliance
Safety, environmental, and regulatory compliance covers worker protection, fire and explosion prevention, confined-space entry, waste management, and air-quality rules. Candidates must understand the SDS, hazard communication, PPE selection, respiratory protection, fit testing, and the difference between air-purifying respirators and supplied-air systems. Air-purifying cartridges are not acceptable for unknown concentrations or oxygen-deficient atmospheres; many coating specifications require supplied air for isocyanate-containing two-component products.
Abrasive blasting creates silica dust, and coating removal may release lead or other toxics. Use engineering controls-containment, ventilation, HEPA vacuum, wet methods where appropriate-and wear the specified respirator. Confined-space work requires a permit, pre-entry and continuous atmospheric testing, an attendant, communication, and rescue provisions. Test oxygen, flammables, and toxics at top, middle, and bottom because vapors vary in density. Ventilate before and during work, bond and ground equipment, control ignition sources, and keep solvent containers closed.
Environmental traps include assuming a "water-based" coating has no VOC, assuming an exempt solvent is nonhazardous, and putting solvent or blast media in ordinary trash. Waste must be characterized and managed under applicable hazardous-waste rules; spills need prevention and response plans.
Worked rule: if confined-space testing shows oxygen at 19.0% or flammables at 12% LEL, stop, evacuate, ventilate, and retest. Do not enter to "check it" or rely on smell. Acceptance ranges are commonly 19.5–23.5% oxygen and below 10% LEL.