Industrial Hygiene Consulting in California
Cal/OSHA Title 8 requires documented exposure assessments for dozens of regulated substances — lead, silica, asbestos, hexavalent chromium, noise, and more. Without a qualified industrial hygienist conducting and documenting those assessments, you are exposed to serious citations, significant penalties, and occupational illness liability that could have been avoided.
McNeil Safety Consulting provides professional industrial hygiene services throughout California — backed by 35+ years of experience and a Licensed Nurse on staff who brings genuine clinical knowledge to every occupational health assessment.
Industrial Hygiene Services
We cover the full spectrum of workplace health hazards — chemical, physical, biological, and ergonomic — with monitoring programs designed to satisfy Cal/OSHA documentation requirements.
Air Quality Monitoring
Personal and area air sampling for chemical vapors, dusts, fumes, mists, and biological agents. We collect samples using NIOSH and OSHA-approved methods, submit to accredited laboratories, and compare results to Cal/OSHA PELs and action levels. Monitoring programs are designed to satisfy Cal/OSHA documentation requirements for regulated substances including lead, silica, asbestos, hexavalent chromium, and hundreds of others.
Chemical Exposure Assessment
Comprehensive evaluation of employee exposures to hazardous chemicals — including review of Safety Data Sheets (SDS), process and task analysis, exposure modeling, and air sampling. We identify which Cal/OSHA standards apply to your operations, determine whether monitoring is required, and develop a monitoring program that satisfies regulatory requirements and protects your workforce.
Noise & Hearing Conservation
Noise level surveys and dosimetry to determine whether employee exposures exceed Cal/OSHA's 85 dBA action level or 90 dBA PEL. When action levels are exceeded, Cal/OSHA requires a written Hearing Conservation Program including audiometric testing, training, and hearing protection. We conduct the noise survey, write the program, and help you implement the required elements.
Ergonomic Evaluations
Workstation and task analysis to identify ergonomic risk factors — repetitive motion, awkward postures, forceful exertions, contact stress, and vibration. California's Repetitive Motion Injuries standard (Title 8, Section 5110) requires employers to implement an ergonomics program when two or more employees performing the same job task experience repetitive motion injuries. We assess risk, identify controls, and write the required program.
Respiratory Protection Programs
Written respiratory protection programs, respirator selection, fit testing, and medical evaluation coordination — required by Cal/OSHA whenever respirators are used in the workplace. We write programs that meet Title 8 Section 5144 requirements, select the appropriate respirator for each task and contaminant, and coordinate the medical evaluation and fit testing process.
Heat Illness Prevention
California's Heat Illness Prevention standard (Title 8, Section 3395) is among the most stringent in the nation and applies to all outdoor workers and many indoor environments. We assess heat exposure, write compliant Heat Illness Prevention Plans, and train supervisors and employees on recognition and response — helping you avoid the significant penalties Cal/OSHA imposes for heat illness violations.
Biological Hazard Assessment
Assessment of biological hazards including mold, bacteria, bloodborne pathogens, and other biological agents in the workplace. We conduct air and surface sampling, interpret results, and recommend controls appropriate to the specific biological hazard and exposure pathway. Particularly relevant for healthcare, agriculture, food processing, and water/wastewater operations.
Hazard Communication (HazCom) Programs
Written Hazard Communication Programs, SDS management systems, and employee training to meet Cal/OSHA's Title 8 Section 5194 requirements. We inventory hazardous chemicals, ensure SDS are current and accessible, write the required program, and deliver training that employees actually understand — not just a checkbox exercise.
Industrial Hygiene Reports & Expert Testimony
Written industrial hygiene reports documenting exposure assessments, monitoring results, and compliance status — suitable for regulatory submissions, insurance purposes, real estate transactions, and litigation. We also provide expert witness testimony in occupational illness cases, OSHA enforcement proceedings, and workers compensation disputes.
Industries We Serve
Industrial hygiene obligations exist across virtually every California industry. We have experience with the specific hazards, standards, and compliance challenges of each.
Frequently Asked Questions
What is industrial hygiene?
Industrial hygiene is the science of anticipating, recognizing, evaluating, and controlling workplace conditions that may cause illness or injury. Industrial hygienists assess physical hazards (noise, heat, radiation), chemical hazards (airborne contaminants, solvents, dusts), biological hazards (mold, bacteria, bloodborne pathogens), and ergonomic hazards — then recommend controls to reduce worker exposure to acceptable levels. Cal/OSHA Title 8 standards for many of these hazards require documented exposure assessments by qualified professionals.
When does Cal/OSHA require an industrial hygiene assessment?
Cal/OSHA requires documented exposure assessments for many specific hazards — including lead, asbestos, silica, hexavalent chromium, noise above action levels, and numerous other regulated substances. The specific trigger varies by standard: some require initial monitoring whenever employees may be exposed, others require monitoring when exposure is reasonably expected to exceed action levels. An industrial hygienist can review your operations and determine which standards apply and what monitoring is required.
What is an air quality assessment and when do I need one?
A workplace air quality assessment measures the concentration of airborne contaminants — including chemical vapors, dusts, fumes, mists, and biological agents — to determine whether worker exposures exceed Cal/OSHA permissible exposure limits (PELs) or action levels. You need one when employees work with or near hazardous chemicals, when complaints of odors or health symptoms arise, when Cal/OSHA requires documented monitoring for a specific substance, or when you are implementing engineering controls and need to verify their effectiveness.
What industries need industrial hygiene services in California?
Industrial hygiene services are needed across a wide range of California industries — manufacturing, construction, healthcare, agriculture, food processing, automotive, aerospace, printing, painting, welding, semiconductor fabrication, janitorial and cleaning services, film and television production, and many others. Any workplace where employees are exposed to chemicals, dusts, noise, heat, or biological agents may have industrial hygiene compliance obligations under Cal/OSHA Title 8.
What is the difference between a PEL and an action level?
A Permissible Exposure Limit (PEL) is the maximum concentration of a substance that employees may be exposed to over a specified time period — typically an 8-hour time-weighted average. An action level is typically set at half the PEL and triggers specific compliance requirements such as exposure monitoring, medical surveillance, and training — even though the PEL has not been exceeded. Employers must understand both thresholds for each regulated substance present in their workplace.
How does industrial hygiene relate to workers compensation?
Occupational illness claims — hearing loss, respiratory disease, chemical sensitization, repetitive strain injuries — are among the most costly and contested workers compensation claims in California. A documented industrial hygiene program that demonstrates proactive exposure monitoring and control is one of the strongest defenses against occupational illness claims. It also reduces the actual incidence of occupational illness, which directly reduces workers compensation costs over time.
Know Your Exposure. Protect Your People.
Call today for a free consultation. We'll review your operations, identify which Cal/OSHA monitoring requirements apply, and tell you exactly what an industrial hygiene program for your business looks like.
Call (626) 546-9384Headquartered in Arcadia, CA · Serving California employers statewide · Licensed Nurse on staff