Langan Engineering and Environmental Services LLC
01/08/2025 | Press release | Archived content
The Environmental Advocate: Clearing Contaminants
January
2025
Clearing Contaminants
Navigating the Complex Cleanup Requirements of PCBs
Although discussions about emerging contaminants have taken much of the focus from polychlorinated biphenyls (PCB), they still exist in electrical equipment and older construction materials, such as caulks and paints. In 1978, the U.S. Environmental Protection Agency (EPA) prohibited most applications, but some uses continue.
A prevalent misconception is that PCB concentrations below 50 parts per million collected from discharges (EPA's acceptable level for authorized use) do not necessitate federal coordination. However, various factors-the date of discharge, the source material's concentrations, and the distinction between authorized and unauthorized uses-must be considered to accurately understand the regulatory framework needed to manage impacts.
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Q&A: Cultural Resources Management
What are cultural resources and when should you engage a CRM professional?
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TECH FOCUS: Harnessing 3D Visualization Software for Optimized Environmental Remediation
Understanding the subsurface is crucial for accurately characterizing contaminated sites, optimizing remediation strategies, and reducing client risks. Advancements in 3D visualization software are revolutionizing environmental remediation by offering powerful tools to enhance conceptual site model (CSM) development and remedial design.
Langan Engineering and Environmental Services LLC published this content on January 08, 2025, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on July 23, 2026 at 11:06 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]