Risk-Based Decisions, Inc.
Environmental Cleanup Consulting Company

Sacramento, California: (916) 923-0570  | 
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Contaminant Fate and Transport

RBDI has successfully employed a wide range of numerical and other models in support of mass quantification, plume delineation, risk assessments and site closure.

Our senior scientists are experienced in the use of ARCVIEW GIS, Groundwater Vistas, GMS, Visual MODFLOW, MT3D, RT3D, MOFAT, MSTS, TOUGH2, VLEACH, SESOIL, HELP, VS2DT, LEACHEC. We have also modified computer model codes for PC-based models such as TOUGH2 and MSTS.


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 - Visualization of subsurface stratigraphy and contaminant plumes


In study of chlorinated and gasoline contaminants in a port area, RBDI used 3D groundwater modeling, along with an analysis of cations and
anions in groundwater, to demonstrate plume delineation and identify the exact location from where the gasoline plume was seeping into the
Stiff Diagram used to show release of contaminant


Used spatial analysis in GIS, contaminant modeling, and chemical fingerprinting to show that what had been assumed to be a large,
city-wide PCE plume for 14 years was, in fact, made up of at least four distinct PCE plumes
Risk Based Decisions - Visualization of separate channels in 3D using CPT data


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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