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RJ Lee Group is your laboratory partner when workplace conditions pose potential risks to workers or the environment.

Industrial Hygiene


RJ Lee Group identifies, evaluates, analyzes, and suggests control measures for environmental elements that originate in the workplace and may be a potential source of risk to workers or the environment. Taking an industrial forensics approach, we offer analytical and consultative services in materials research and selection, environmental health and safety and quality control throughout the product life cycle.

Particulate Matter (PM)

Identifying the composition of particulate can lead to the source of particulate or contamination. When air quality concerns exist, identifying particulate size will determine if it exceeds the criteria for respirable particulate matter (RPM). RJ Lee Group’s team of experts is familiar with industry standards and guidelines that ensure environmental safety and health and we can assess potential negative impacts to determine where controls are necessary. Our experts monitor, sample and analyze particulate matter in the workplace to assess air quality conditions and to determine if any particulate produced during processing and manufacture affects the workers or product. This is especially important in industries that manufacture pharmaceuticals and electronic materials which can generate contaminants of concern down to the nano level. We observe manufacturing processes to uncover any environmental or occupational issues and recommend changes to reduce potential exposure and contamination. Our expertise ranges from the regulatory demands of hospital pharmacy and clean room environments, to the characterization of aggregates and nuisance dust in the construction industry, to the monitoring of air in coal mines and examination of flyash from coal-burning plants.

Unbound Nanoparticles (UNP)

Unbound Nanoparticles can be man-made or can occur incidentally in ambient air in the form of diesel and welding fumes and coal combustion, or from natural sources such as smog or fire. Materials at the nanoscale level exhibit different properties than they do at the macro level because at the nano scale their molecules tend to self-assemble and form new structures. We use electron microscopy, diffraction and spectroscopy techniques to measure size, determine morphology and agglomeration state, elemental composition and the structures of new materials at the nanoscale. We work in collaboration with industry, government and academia to characterize nanoparticles and to prepare for their regulation. RJ Lee Group is a leading edge contributor to nanoscale particulate studies and has successfully completed several monitoring projects for federal government and industry clients where the health and safety hazards as well as environmental impacts related to UNP were evaluated.

Monitoring and Sampling

RJ Lee Group has extensive practical experience in designing and implementing air sampling and monitoring plans to measure particulate matter, asbestos, dust, vapors, metals and crystalline silica, PCBs, PNAs and dioxins. We also perform environmental site assessments and source apportionment plans to determine the contributions of various pollution sources to a location of interest. We can help determine the best approach for monitoring particulate matter or vapors and aerosol particles including:

  • Indoor Air Quality (IAQ) and Workplace Monitoring (IEQ)
  • To meet EPA requirements
  • To assess personal exposure of workers to volatile compounds
  • To determine process pollutants
  • Environmental Monitoring
  • Source identification
  • Source apportionment
  • Nuisance dust monitoring
  • Simulation chambers
  • Product Labeling Information
  • Provide a controlled environment to establish product safety information such as generation rate and exposure impact for MSDS and information/warning labeling.

To learn more about our industrial hygiene services, please contact us at 1.800.860.1775, option 1, then 2.