Geoprobe™ MIP - high definition deliniation system
MIP (Membrane Interphase Probe), a High Definition Delineation (HDD) system, is a "ground breaking" tool which provides a visual image of subsurface soil and groundwater conditions. This technology enhances insitu delineation accuracy and has become an indispensible tool for use by collaborative engineering firms. This technology is an advancement over the traditional method of advancing 2 inch boreholes across an area of impairment. Then, based on the results of the drilling program, an area of impairment is estimated.
All too often previous delineation methods were inaccurate, costing property owners and stakeholders resources and money as well as possible litigation.
The HDD technology provides a dynamic 3D model of the contaminated area. Using a series of probes connected to computers and field instruments, the HDD provides real-time delineation of contaminants. The HDD system pinpoints where contamination exists, at what depth and in what soil conditions. This means we can "see" how contaminants have migrated across a site, taking the guess work out of delineating impairment on a site and leading success rates with insitu treatment. This whole process is done in real time, providing instant data on-site.
Using high-resolution graphics, the delineation is translated into a series of graphic representations of the subsurface, providing illustrations of where contamination exists and the actual soil matrix. As a confirmation, the industry-standard drilling program results can be graphically overlaid with the HDD results to cross- check site conditions. How it works in detail…
Electrical Conductivity (EC)... Soil conductivity and resistivity have historically been used to classify soils. Higher electrical conductivities represent finer grained sediments (i.e. silts or clays) while sands and gravels have distinctly lower electrical conductivities. Core samples obtained during drilling can be used to verify the lithology, and are shown by electrical conductivity values at a site. The electrical logs are correlated across the site to show changes in thickness or elevation of lithologic units of interest. EC logs define zones of lower conductivity, equivalent to coarser grained, more permeable sediments, which will allow the movement of contaminants (hydrocarbons, chlorinated VOCs, or metals) in the subsurface. This information is used to delineate the subsurface contamination migration and is a valuable tool in well placement as well determining the concentration of oxidantes and or microbial blends required to remdiate the site.
Reporting Options... Standard reports include daily hard copy reports of all HDD logs performed. Probe temperature, rate of advance, EC (electrical conductivity), ECD (electron capture detector), PID (photo ionization detector) and FID (flame ionization detector) responses will be plotted vs. feet below grade. All data is supplied in a tab-delimited format, easily imported into Excel. The information and data will be uploaded to a share-point website on the internet that is password protected and availble to authorized individuals.
Sample Microsoft EXCEL HDD log (right) More advanced reports can be generated upon request, which include two-dimensional cross sections, with a strip-log mapping conductivity to lithology, or three-dimensional models and fences or each area.
3D Geochemistry Model
Volume rendering offers another fully three-dimensional visualization technique for representing contaminant plumes.
Area cutting function and transparency can be used to create the visualization, below, which shows the contameveal the 30 inant levels along the downward projected building outlines. The five geologic units can be exploded to rppm plume in each layer.
ECD Plume with Conductivity Fences, Solid Visualization of Plume from ECD and Conductivity Data
Sample 3D Conductivity Cross-Section Vertical Strip-Log with Conductivity (blue)/Lithology (center borehole), FID (red), and PID (green).
FID Cross Section with 5 locations.
FID Distribution Map.
The HDD technology saves valuable time and money in the site remediation process. High Definition Delineation – seeing is believing….