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:

The Top 10 Things to Tell Your Petrographer

Dennis Hyde

December 18, 2014

If you want solid answers to your concrete questions, a petrographer can help. Petrographers use a combination of visual inspection, microscopy, and chemical techniques to examine concrete cores. These analyses provide a basis for understanding the condition of the material, why it failed, or the material’s remaining service life. If you are submitting concrete cores, you might assume that it is best not to provide too much information about the samples because it could “bias” the analytical results. The opposite is true, however. The petrographic analysis is only a piece of the puzzle, and so the more information you provide initially, the more accurate the final report or diagnosis will be. Here are the top 10 pieces of information you can include with the chain of custody form to ensure the petrographic examination is as useful as possible.

  1. What samples/IDs are included?
    Identify each sample by clearly writing on the bag or container and provide a filled in chain of custody or transmittal letter. If the top of the core or sample is not obvious, indicate it with an arrow.
  2. What symptoms were identified/what is the reason for testing?
    Provide the reason for petrographic examination such as spalling, cracking, low compressive strength test results, etc.
  3. What type of structure was the core extracted from?
    Was it a slab, beam, bridge deck, foundation wall, etc?
  4. What was the date of construction?
    If you are not sure of the date of construction, make an estimate.
  5. What previous repairs were needed?
    If there was a repair material, do you want both materials evaluated? Provide any details on both materials.
  6. When did distress begin?
    At what point in the service life did the defect or deterioration begin to show?
  7. What is the geographic location of the structure?
    Is the structure located in the Northeastern USA, Canada, Southern USA, etc? Location becomes important when considering exposures such as freeze-thaw, de-icing salts, sulfates in soil, and other factors.
  8. What were the structure’s exposure conditions?
    If exposed to seawater for example, was it exposed above, below, at the splash zone, or to vehicle traffic, etc.
  9. Site photographs or drawings
    Provide any photographs of the deterioration and the location of sample within the structure.
  10. Client name, address, and billing information
    This information helps us know where to send the report, as well as the date results are needed. Standard turnaround time is 15-20 days for RJ Lee Group’s petrographic analyses. If anything less is required, that must be indicated and we will contact you.

With all petrographic examinations, the more information you provide regarding the context of the concrete, the more informative your petrographic report will be.

To learn what types of information a petrographic examination provides read “What Can Petrography Tell You About the Condition of Concrete Structures?”

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