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HydroAnalysis

Modeling of Alternative Lagoon Closure Plans at Oil Refineries, Illinois and Missouri

 

HydroAnalysis developed and applied ground-water contaminant transport models to evaluate the environmental risks associated with alternative closure plans for inactive oil wastewater and sludge lagoons. Clients: Major oil companies through subcontract with Charles A. Menzie and Associates.

 

Modeling of Manufactured Gas Plant Sites, Michigan, Indiana, and New Hampshire

 

HydroAnalysis assisted in the development of site investigation work plans and site data analysis for former MGP sites in Michigan, Indiana, and New Hampshire. We also developed a two-dimensional vertical model of ground-water contaminant transport for the site and near-site area to evaluate the potential transport of dissolved-phase constituents. Client: Utility clients through subcontracts with engineering firms.

 

Ground-water Extraction and Treatment Systems, Petroleum Pipeline

 

HydroAnalysis has designed interception wells for capture and control of contaminated ground water at oil pipeline terminals in New Jersey, South Carolina, and North Carolina. A ground-water streamline and capture zone model developed by HydroAnalysis was used to determine the location, pumping rates, and design of ground-water extraction wells. Client: Major oil pipeline company through subcontracts to The Paulding Company.

 

Site Assessment, Gasoline Service Station, Wilmington, Massachusetts

 

HydroAnalysis was retained as a consultant to “trouble-shoot” a gasoline service station site investigation complicated by the presence of chlorinated organic chemicals. Dr. Shanahan analyzed the available data, developed a conceptual model that attributed the chlorinated solvents to an off-site source, and designed a field sampling program utilizing drive-point sampling technology to confirm the conceptual model. The result was a successful demonstration to the Massachusetts Department of Environmental Protection that an off-site source was responsible for the solvent contamination. Client: Major oil company through subcontract with dsEnvironmental, Inc.

 

Expert Consulting for Litigation, Verona Wells Superfund Site, Battle Creek, Michigan

 

HydroAnalysis provided attorney with technical review and interpretation on issues related to ground-water flow and water quality at contaminated municipal supply wells. HydroAnalysis provided technical analyses of the extent and character of ground-water contamination and historical contaminant travel times and directions. Client: Law firm

 

Review of Property Acquisitions, Massachusetts

 

HydroAnalysis has assisted client in the review of industrial properties under consideration for acquisition. Potential ground-water and soil contamination problems at the sites were identified and reviewed, and the client was apprised of potential liabilities associated with the properties. Client: Energy development corporation.

 

Superfund Section 104 Site, Maine

 

HydroAnalysis collected background hydrogeologic and operations information on a site formerly owned by the client. The site was the subject of an EPA removal action as a result of site uses subsequent to client's ownership. Client: Major chemical manufacturing company.

 

GROUND-WATER REMEDIAL ACTION WOBURN WELLS G & H SUPERFUND SITE, WOBURN, MASSACHUSETTS

 

HydroAnalysis directed the ground-water-related aspects of a Superfund Remedial Action/Remedial Design (RD/RA) for a portion of the Woburn Wells G & H Superfund site in Woburn, Massachusetts. The work is being conducted on behalf of the private landowner under supervision by the U.S. Environmental Protection Agency. The site was historically contaminated by unauthorized disposal ("midnight dumping") of a variety of materials, primarily trichloroethylene and other volatile organic compounds. Site investigations have shown that trichloroethylene is present as a dense non-aqueous phase liquid (DNAPL) in the site bedrock.

HydroAnalysis has responsibility for a variety of tasks on this project, including the following completed to date:

·          Preparation of the ground-water-related portions of the work plan for the site pre-design investigation.

·          Analysis and interpretation of ground-water elevation and quality data and preparation of the ground-water-related portions of the pre-design investigation report.

·          Pilot testing of air sparging and pump-and-treat systems as part of development of a site ground-water remedial action.

·          Development of an aquifer test plan for the bedrock aquifer and subsequent analysis and modeling of aquifer test data.

·          Negotiation of plans and procedures with the U.S. EPA and Massachusetts Department of Environmental Protection.

·          Development of the ground-water related portions of a Remedial Investigation/Feasibility Study (RI/FS) for neighboring land parcels.

The project was completed in cooperation with ThermoRetec, Inc.

 

REMEDIAL ACTION MODELING KOPPERS SUPERFUND SITE, GALESBURG, ILLINOIS

 

HydroAnalysis developed and applied a model of contaminant transport for use in comparing alternative remedial actions for contaminated soil at this active wood-treating operation. Contaminants at the site include the wood preservatives pentachlorophenol and creosote.

The study examined the interrelationship between the contaminated soils at the site surface and the ground water flowing beneath. Long-term transport of pentachlorophenol and selected polynuclear aromatic hydrocarbons was examined using computer models. HydroAnalysis developed a model based on chemical-equilibrium relationships to predict how infiltrating water would leach chemicals from contaminated soils. The results of the soil leaching calculations were then used as input to a ground-water transport model that predicted the subsequent transport of the chemicals in ground water. The predictions were presented as graphs of contaminant concentrations in ground water at the downgradient facility boundary as a function of future time. The model results illustrated the comparative effectiveness of alternative soil remedial actions in preventing or reducing ground-water contamination.

HydroAnalysis presented the study results to the Illinois Environmental Protection Agency as a part of negotiations between our client and the agency regarding the site remedy. The method of analysis and results were also described in a study report.
HydroAnalysis continues to work on the site with responsibility for leading the ground-water-related aspects of the Superfund Remedial Design/Remedial Action.

HydroAnalysis prepared a plan for investigation of potential asbestos contamination of ground water and contributed to plans for investigating creosote DNAPL, conducting an aquifer study using interception trenches, and for pilot-testing ground-water remediation alternatives. We completed an analysis of ground water flow and aquifer properties based on the trench pumping test.

The project clients are Burlington Northern Railroad and Beazer through a subcontract to ThermoRetec, Inc.

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