ESS Group, Inc. is currently the Supervising (Prime) Contractor
for the implementation of the Groundwater Remedy Pre-design Statement of Work
(SOW) for the potentially responsible parties (PRPs) at the Davis Liquid Waste
Superfund Site in Smithfield,
Rhode Island. The site was
formerly used for the disposal of a variety of liquid industrial wastes
including chlorinated volatile organic compounds, medical wastes, and over one
million tires.
The objective of the pre-design work is to characterize
current site conditions for the purpose of evaluating the appropriateness of
the original groundwater remedy, groundwater pump and treat, and other
alternative approaches that would be acceptable to the Site PRPs, US
Environmental Protection Agency (USEPA), and Rhode Island Department of
Environmental Management (RIDEM). The project scope has included the
development and negotiation of work plans for a comprehensive hydrogeologic
evaluation and groundwater plume delineation in a fractured bedrock setting.
Phase I of the investigation program, which included a
comprehensive well integrity assessment and groundwater monitoring of the
existing monitoring well network, was completed in 2002. Phase II was completed
in 2004 and involved the installation of overburden and bedrock wells, followed
by the comprehensive monitoring of an extensive groundwater monitoring well
network to allow better definition of the groundwater plume and hydrogeologic
characteristics. Phase III, which involved groundwater monitoring and
evaluation of geochemical conditions related to natural attenuation for approximately
two years, has also been completed.
Phase IV activities, including a Focused Feasibility Study to select the
groundwater remedy, are currently ongoing and include a detailed subsurface investigation
in the former disposal areas.
ESS uses a GIS/Key database to house all chemistry,
geology, and hydrology data that has been collected at the Site during the pre-design
investigation. This database supports the efficient management and reporting of
data and the development of graphics for data interpretation.
ESS
also supports the PRPs with both task-specific and long-range cost estimating
and strategic technical and regulatory consulting services.
Relevant Services Include:
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Supervising
Contractor
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Preparation of USEPA Region 1 Work Plan Documents
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Development and Negotiation of Groundwater Investigatory Approaches with USEPA and RIDEM
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Implementation of Comprehensive Hydrogeologic Evaluation in Unconsolidated Deposits and Fractured Bedrock
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Performance of Monitored Natural Attentuation Evaluation as Potential Groundwater Remedy
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Comprehensive Groundwater Monitoring Program
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GIS/Key Database Management and Reporting
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Development of Conceptual Model of Site Hydrogeology and Fate and Transport
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Preparation of Task-Specific and Long-Range Cost Estimates
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Development and Implementation of Source Area Investigation
