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Service Expertise:
Environmental Services

Water Resource 

RCRA/CERCLA Cleanup
Aquifer Storage and Retrieval (ASR)  
Effluent Disposal Systems
Reclaimed Water Injection for Seawater Barrier
Mining Industry
Landfill

Chemical and Petroleum Industry

Data Reports

 
EWM Services and Products for Mining Projects
Landfill Superfund site operators are spending millions of dollars in site characterization and cleanup of the contaminated groundwater.  Current and old landfill sites have to follow stringent compliance requirements to protect public health and groundwater.

EPA Background Information on Mining Demonstration Projects:



EPA Innovative Remediation Technologies: Field-Scale Demonstration Pr Projects in
North America, 2nd Edition Year 2000 Report consolidates key reference information in a matrix to quickly identify new technologies that may answer their cleanup needs and contacts for obtaining technology demonstration results and other information. Following images from year 2000 report list site distributions and contaminants in all projects



Groundwater remediation methods include Air Sparging; Push-Pull Monitoring/Optimization; Air Sparging (Air-Injection Tracer Monitoring/Optimization); Biodegradation, Groundwater Extraction & Air Stripping; Circulation Wells, Horizontal, w/Zero-Valent Iron and Activated Carbon Enhancements; Permeable Reactive Barrier (Iron & ORC)

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EWMgroup technologies and services for mining sites include following

Task description

Current practice

EWM approach and benefits

Mining Site Geologic Setting Conceptual model

Labor intensive manual data upload, processing, and visualization

EWM procedures efficiently use import available geologic setting information.
EWM brings special expertise in developing credible conceptual models of mining site with integrated tools for generating informative sections and horizontal slices.

Maintain consolidated data repository of site

Data compiled and used by contractors in different stages of projects generally gets buried in the project reports.

EWM procedures provide efficient means for object-oriented data storage, editing, and updates.

Review of monitoring data by site operators, field staff, regulators, and the public

Site operators and regulators generally depend on the extracted partial data processed by a contractor or staff.

EWM – SHOWME interfaces with the site database and provides nightly updated plots EWM concise informative displays include all details for site managers and regulators.

Groundwater level distributions - regional, local, and at the mining site

Available in tabular forms only.

EWM EDA provides each well summary tables, each well plot with all associated details.

Groundwater travel path and rate of flow

Generally performed occasionally and not maintained up to date.

EWM tools provide current travel path and travel time estimates with flow vectors.

Contaminant plumes of chemical of concerns near landfill sites

These are generally occasionally.

EWM sets up procedures will most current on line contaminant distribution maps

RI/FS tasks and Remediation of contaminated groundwater

Uses manually intensive, costly procedures for data processing and assessments

EWM tools are automated and provide state-of-the-art technologies

Long-term monitoring of closed sites

No detailed conceptual models are used for design

EWM real time data evaluations allow improvement of monitoring strategies if needed based on current data

EWM understands scientific, engineering, and regulatory needs. EWM also understands monitoring, data processing, and analyses costs. Rather than piecemeal last minute costly repeated efforts, EWM proposes the development and maintenance of a systematic plan of each site which will keep site operators, regulators, and the concerned public fully informed of the current environmental status through the internet.



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Groundwater Flow Analyses in a Mining System

The evaluation of a flow field at a mining site is highly complicated due to the complex geometry of the mining structures, tunnels, blasted zones, faults, and other spatial variables. EWM Group’s CFEST algorithm has been used for several mining sites. The CFEST input data structure provides an easy means to develop a mathematical representation of highly complex geometry. The high hydraulic conductivity contrast between blasted/open areas and undisturbed ore bodies are effectively simulated.

The EWM finite element capabilities for mining sites provide easy means for mathematical representation of site specific complexities associated with geologic layer (continuity, thicknesses, and properties); faults, tunnels, blasted areas, and other key features impacting flow and transport. Interactively users can develop finite element grid. CFEST interfaces estimates top and base elevation of each feature at the node for three-dimensional model development and assessments.

EWM generated mathematical models with intensive graphic interfaces and easy to modify local scale grid provide state-of-the-art testing, designing, and post processing of remediation methods.

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