Lowell Kessel, General Mgr./Sr. Hydrogeologist/Tech. Director, CERES Remediation Products

IPEConnect PRESENTATION DATE: September 5, 2024

The presentation focuses on the application of in-situ remediation reagents, chemistries and media for the purpose of sequestering contaminants in-situ while also reducing, degrading or destroying contaminants. During the presentation we will discuss how utilizing site specific hydrogeologic parameters and biogeochemical conditions to formulate the combined remediation amendments will achieve larger distributions, more effective intersection of preferential pathways, expedite the reduction in contaminant flux, reduction in mass, and/or dissolved phase plume and resulting in plume immobilization and a significantly reduced time of remediation (many years to just months).

Premise: There is no single product or injection approach for all sites. So practitioners must utilize all available site data from the (Preferably high resolution) Site Conceptual Model. In addition, the value in increased contact with naturally existing preferential pathways and the benefit of understanding delivery methods strengths and weaknesses is key to delivering the required reagent dosage.

This presentation will discuss differences in the placement of soluble, colloidal and granular remediation products in sandy, silty, clay and fractured rock site conditions. Noting that clay and fractured bedrock environments, are often among the most challenging types of remediation projects in our industry.

Approach/Activities: Particular attention is given to (1) stratigraphy, hydrogeology, fate and transport and geological media porosity and permeability, (2) the difference between permeation injection and fracture injection, (3) reagent selection (when are soluble, colloidal, granular, fast acting vs slow acting and proppants necessary alone or combined?), and (4) reagent distribution verification.