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GSI staff are leaders in engineering design, hydrogeological assessments, risk management, groundwater modeling, and regulatory compliance for our electric power utility clients. Our clients rely on us to understand nuances in technical and regulatory matters and identify and address environmental concerns associated with management of CCR. Our multi-disciplinary team provides insights into the technical risks and costs of CCR management and compliance, helping our clients establish sound strategies for effective assessment and monitoring, remedy selection, and long-term management of CCR.


GSI is actively conducting semiannual groundwater detection and corrective action monitoring, as well as implementing groundwater remedies, at a Texas CCR site. This work also includes compliance reviews to ensure that Federal and new State of Texas requirements are met.



GSI provided regulatory and technical review of a groundwater monitoring network developed for a CCR landfill at a different site in Texas. The review included statistical evaluations and recommendations for alternate sampling approaches to improve data quality and reliability, and to reduce false exceedances of regulatory threshold criteria.



GSI conducted sampling and bench-scale studies to evaluate closure options for three CCR settlement ponds. The closure was completed by solidifying CCR sediment in-place and installing an engineered cover to prevent exposure to the CCR sediment and affected soils.
Related practice areas include: