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Capping and Engineered BarriersCEA has worked on several projects that required the use caps and engineered containment barriers as remedial alternatives. Our experience covers both subsurface barriers and surface barriers using various barrier construction materials and installation techniques.To be effective, surface barriers must control the infiltration of precipitation and surface runoff, erosion, and bio-intrusion, with minimal maintenance. CEA recommends visiting the site on a periodic basis for maintenance and monitoring to insure the integrity of the cap over a long period of time. CEA is familiar with different types of caps from RCRA multi-layer barriers to simple soil and asphalt pavement barriers. Many state environmental programs allow for the use of simple barriers in conjunction with Activity Use Limitations (AUL) and access restrictions. CEA's goal is to meet regulatory and site requirements in the most cost-effective manner. CEA uses technologies for constructing subsurface barriers based on site-specific conditions and contaminants of concern. The effective performance lifetime of a subsurface barrier is a function of the climate, hydrology, and geology. Success or failure of a barrier is a direct result of the use of proper installation techniques used by the contractor. CEA provides its clients with demonstrated experience, well-defined performance standards along with quality control and quality assurance metrics. Once a barrier is installed, CEA provides its clients with monitoring services to check for unexpected, uncertain, or unpredictable long-term events such as climatic changes from the weather, attendant physical, chemical, and biological factors acting on the barrier. CEA also provides its clients non-invasive monitoring techniques, such as shallow exploration geophysics to ensure the barrier is functioning as designed. |
