High-risk industries requiring monitoring include manufacturing and chemical processing facilities where workers face daily exposure to hazardous substances. Construction and demolition operations require monitoring for asbestos, silica, and other dangerous materials while healthcare facilities and laboratories need protection from biological and chemical hazards. Automotive and metalworking operations generate metal particles, solvents, and other toxic exposures. Food processing and agricultural facilities face unique challenges from pesticides, cleaning chemicals, and biological contaminants. Required monitoring situations include OSHA-mandated exposure assessments, employee health complaints or symptoms, new processes involving hazardous materials, regulatory inspections, and workers’ compensation claim investigations that require detailed exposure documentation.