The recent improvements in the collection of high resolution subsurface data has improved our ability to surgically apply in-situ injection technologies and utilize in-situ treatment products with better results. Previously, many in-situ remediation designs were based on limited, inadequate data, and relied on initial site characterizations. Both qualitative and quantitative data are needed in three dimensions to effectively apply treatments, saving time and money. High-resolution site characterization (HRSC) tools such as Membrane Interface Probes (MIP), Optical Image Profiler (OIP-UV Fluorescence), Hydraulic Profiling Tool (HPT), and Electrical Conductivity (EC) are combined with high density sampling of saturated soil cores to gather the data required for a Remedial Design Characterization (RDC). Once this data is modeled, a high-resolution treatment can be designed. The biggest failure of in-situ treatments has been the improper dosing and/or placement of the treatment product. It’s a contact sport – If the treatment does not contact the contaminant, the treatment will fall short of remediation goals. Utilizing properly designed injection methods combined, product dosing, and placement, one treatment can clean up a site. Methods and equipment for many different types of liquid and solid treatment products, in various types of heterogeneous soil types and bedrock formations, are presented.

Primary Author/Conference Presenter:
John Fontana
PG, President/CEO
Vista GeoScience
Golden, Colorado, USA