Risk-Based Decisions, Inc.
Environmental Cleanup Consulting Company

Sacramento, California: (916) 923-0570  | 
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Investigation and Remediation of Contaminated Soil and Groundwater

Over the past 22 years, RBDI has successfully obtained No Further Action letters from regulatory agencies on 23 chlorinated solvent sites and an additional 42 sites impacted by MTBE/gasoline, pesticides, PCBs, dioxins, or metals. Among these was closure of a Superfund site impacted by chlorinated solvents, where our client was released from the PRP group as a result of our analysis.

The following key factors distinguish RBDI from others in the field:


Perform statistically valid soil and groundwater sampling such that each sample collected can be justified on a scientific basis minimizing the
need for multiple rounds of sampling and associated cost excursions.


Developed techniques to chemically “fingerprint” contaminant
sources in both soils and groundwater
(Jamall, I.S., Lu, T.X., Huber, W.A.  2005.
Distinguishing between Multiple Chlorinated Solvent
Plumes: A Comprehensive Approach
. Soils, Sediment and Water
, Amherst, Massachusetts, October).

  Developed techniques to chemically “fingerprint” contaminant  

Implemented innovative methods to remediate chlorinated solvents
in situ in record time and at a fraction of the cost of pump-and-treat.


Developed in situ oxidation techniques to treat carcinogenic pesticides previously believed to be recalcitrant (Jamall, I.S. and Brown, I.  2006.  Oxidative Remediation of Diphenylamine in Wastewater.
Bull. Environ. Contam. Toxicol
. 76:740-744)


Developed, designed, and implemented an ex situ UV/peroxide
treatment system to destroy MTBE in extracted groundwater by as
much as 98%, thereby significantly extending the life of the activated
carbon units from change-outs every 7 weeks to no change-outs for
765 days resulting in substantial cost savings to the client
(Jamall, I.S., Lu, T.X. and Powers, J.  2006.  Ex situ Treatment of
MTBE-Containing Groundwater by a UV Peroxide System.
Remediation Journal,

  Risk Based Decisions •	Implemented innovative methods to remediate chlorinated solvents in situ in record time and at a fraction of the cost of pump-and-treat  

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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