Risk-Based Decisions, Inc.
Environmental Cleanup Consulting Company

Sacramento, California: (916) 923-0570  | 
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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.

  Risk Based Decisions - Distinguishing between two PCE releases through soil gas sampling  

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.

  For more information about Risk-Based Decisions, Inc. call (916) 923-0570.  

Risk-Based Decisions, Inc. 1540 River Park Drive, Suite 203 Sacramento, CA 95815  P:  (916) 923-0570  F: (916) 923-0611  Email

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