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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. 

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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.
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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:

Expert Analysis: The EPA’s Regulatory Changes Regarding Trichloroethylene & Safe Environmental Levels

RJ Lee Group News

May 21, 2012

Industrial plants where VOCs may be found

VOCs are found in soil and groundwater near industrial plants using solvents and in a variety of industrial and commercial processes including chemical manufacturing and petroleum refining.

VOCs may be found in soil and groundwater near industrial plants using solvents and in a variety of industrial and commercial processes including chemical manufacturing and petroleum refining.

In September 2011, the Environmental Protection Agency (EPA) announced its final health assessment for trichloroethylene (TCE), a chlorinated hydrocarbon commonly used in industrial degreasing solvent operations such as the cleaning metal parts. The impact will be increased estimated risk levels, lower detection limits not routinely available and modification of remediation strategies in some cases.

Soil, Groundwater and Vapor Intrusion

One of the most significant implications of this assessment will be the need for changes to risk-based corrective action activities at chemical release sites where TCE is a chemical of concern. TCE’s toxicity assessment will lead to increases in risk estimates by a factor of 2 to 9 depending on the calculations used and will most likely lead to more costly cleanup requirements at sites where TCE has been released to soil or groundwater. TCE toxicity values will be evaluated by the EPA when calculating the risk from vapor intrusion as well as in the development of appropriate regulatory standards to limit atmospheric emissions of TCE, a hazardous air pollutant under the Clean Air Act.

Contaminated groundwater can emit TCE vapors

One of the EPA’s emerging issues is that of vapor intrusion or when Trychloroehylene (TCE) vapors move from contaminated groundwater and soil into the indoor air of overlying buildings.

One of the EPA’s emerging issues is that of vapor intrusion, such as when TCE vapors move from contaminated groundwater and soil into the indoor air of overlying buildings. The likelihood is that vapor intrusion investigations will be affected when using the new lower screening levels for soil vapor and groundwater since these levels may require more detailed assessments that include indoor air sampling or soil vapor monitoring. In some cases, the EPA has reported TCE levels in indoor air background concentrations from 1.1 (median) to 2.1 (90th percentile) micrograms/m3 in residences not affected by vapor intrusion, values that are higher than the revised levels. Revised indoor air screening levels for TCE may be more difficult to distinguish from background concentrations of TCE without significant technological input.

The Solution

One of the difficulties in addressing these new toxicity values is that much of the current technology has not been able to detect TCE at the new level prescribed by the EPA, especially in the field. However, mobile instruments such as the Proton Transfer Reaction Mass Spectrometer (PTR-MS) are now available to meet these criteria by sampling VOCs in air concentration down to single parts per trillion levels. Direct air sampling provides microsecond response time. This technology provides both a continuous minute-by-minute record of concentrations throughout the day or an inch-by-inch detailed map of an area of interest.

References

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