This guidance provides a framework for the design, construction, and long-term monitoring approach for the chemical isolation function of sediment caps. It is intended for regulators, stakeholders, consultants, responsible parties, and owners of contaminated sediment sites where sediment capping has been selected as a remedy. This guidance supports the use of iterative design process informed by site-specific data that balances achievement of chemical design criteria, physical design constraints, constructability, and permitting requirements. In addition, the guidance summarizes key construction considerations and presents a recommended approach for monitoring and evaluating long-term chemical isolation performance.
Recommended Framework for Sediment Cap Design
Source: ITRC Sediment Cap Update Team
Published by the Interstate Technology & Regulatory Council, September 2023