Statistical and Spatial Analysis and Visualization of Data
Since its inception, RBDI has focused on using statistical methods to site characterization. The advantage of this approach is that it results in a known degree of confidence in the horizontal and vertical distribution of contamination. This approach fits well with characterizing a site to assess potential exposure point concentrations and to identify source areas. Our risk-based approach is tailored to each site, and can obviate the need for seemingly endless rounds of sampling when the objectives of the sampling are clearly enunciated, discussed with regulators, and met by the data collected.
RBDI has also used statistics to quantify residual mass in soil, soil gas, and groundwater such that the most cost effective remediation methods can be used to reduce mass quickly in the source areas and thereby reduce costs and time to regulatory closure.
- Developed 2D and 3D visualizations to show contaminant plumes in the subsurface thus allowing for a visual display of where plumes could or could not have migrated.
- Using GIS and soil stratigraphy information from cone penetrometer
test (CPT) data RBDI developed a 3D map of the “clay floor” beneath shallow groundwater to show depressions where Dense Aqueous Phase Liquids (DNAPLs) had pooled.
- Used GIS and Visualization tools to demonstrate groundwater flow directions in site vicinity to establish where contaminants could and could not have migrated.