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 built 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:

Test Chamber Simulation Studies Confirm Respirator Effectiveness for Airborne Coal Dust

RJ Lee Group News

May 16, 2016

A number of personal injury claims asserted that NIOSH-approved respirators worn by coal miners were tested using silica dust and therefore were not effective for miners exposed to airborne coal dust. The NIOSH method evaluated the performance of air-purifying respirators according to Title 30, Part 11 of the Code of Federal Regulations. A law firm representing a respirator manufacturer retained RJ Lee Group to conduct studies using their client’s respirators to determine if the respirators were effective when exposed to airborne coal dust.

Our experts constructed a dust generation chamber similar to the NIOSH chamber to determine the overall efficacy of the respirator when exposed to airborne coal dust. The test chamber included mounted filtering face pieces and computer-operated breathing simulators. The equipment and protocol for running the coal dust tests followed those set forth in the Code of Federal Regulations (CFR): Title 30, Part 11, Subparts 11.140-4 (where coal dust was substituted for silica dust). We secured samples of bituminous coal from a mine of interest, ground and sieved the samples and injected the sieved coal dust into the simulation chamber.

The studies we conducted with coal dust confirmed the original findings of the NIOSH tests using silica dust indicating that the respirators were effective for use in coal mines. We confirmed our laboratory testing by conducting on-site coal mine studies and comparing the results.

Related Posts

PTR-MS and Indoor Air Research

PTR-MS and Indoor Air Research

Indoor air quality research continues to grow substantially over the last several years. Most research prior to the 2010’s was focused on outdoor...