We provide testing services to certify product and materials compliance, support quality control, and ensure the health and safety of workers and their environment. We provide assistance for clients who are not sure what tests they need. Our accredited materials characterization laboratory is the foundation of all the services of RJ Lee Group provides, including standardized testing for compliance, industrial hygiene and environmental analyses, quality control, and materials research and development.

We provide credentialed expertise supported by robust scientific data. We provide significant support to industrial clients for product development, industrial hygiene and overall production support.

RJ Lee Group maintains a visible and respected reputation within the legal community, having offered scientific support in civil litigation matters for nearly 30 years. 

  • Product Liability 
  • Toxic Tort
  • Construction Defect
  • Fugitive Emission
  • Personal Injury
  • Patent Infringement
  • Contract Disputes
  • Insurance Subrogation

Subject Matter Experts

From our core business of providing scientific solutions to our clients, we have developed innovative products. Some are produced internally, and some have arisen from partnerships with other research organizations. 

For example, we build lab software solutions to help manage and streamline your labs data, and environmental testing products for a variety of applications. 

  • IntelliSEM is a powerful automated particle analysis system.
  • ParticleID is  a customizable cloud hosted web application used to identify foreign particulate matter and  assist with root cause investigations. 

Other products we create count particles and help keep the air and environment safe.

RJ Lee Group is a materials analysis laboratory and consulting company which serves many different industries. We offer scientific solutions such as industrial forensics services, laboratory and testing services, litigation support, and laboratory software to many industries:

UNC Passive Aerosol Sampler


The UNC passive aerosol sampler represents an innovative and cost-effective technology designed to obtain particulate concentration and composition information related to air quality in both indoor and outdoor environments. The sampler does not need power, so it can be used virtually anywhere that allows evaluation of the spatial distribution of particulate matter, and is easily deployed by simply attaching it to readily available objects.

Originally developed to serve as a personal particular monitor in industrial hygiene (IH) applications, the UNC passive aerosol sampler provides particulate concentration data in studies where active samplers are not feasible. The sampler may also be used to complement Federal Reference Method (FRM) particulate samplers by providing spatial distribution data associated with coarse PM10-2.5 particles. A unique benefit of the UNC passive aerosol sampler is that it not only provides information on the characteristics of the particulate matter (size and elemental composition), but it provides estimates for ambient concentration as µg/m3 through analysis using computer-controlled scanning electron microscopy (CCSEM) techniques.

The sampler’s ability to provide particulate concentration data (µg/m3) makes it effective for measurements involving PM10, PM2.5, and PM10-2.5 concentrations in ambient environments. Based on the success of the UNC passive aerosol sampler to estimate PM10-2.5 concentration data, the UNC passive aerosol sampler has been used in a number of studies by the U.S. Environmental Protection Agency (EPA) to evaluate the spatial distribution associated with coarse particulate matter (PM10-2.5).