Trichloroethene (TCE) and hexavalent chromium (CrVI) have impacted shallow groundwater beneath an active manufacturing facility in Svendborg, Denmark. The site is primarily underlain by moraine clay deposits, and a thin sand layer is continuous across much of the site.
Risk assessment at contaminated sites in Sweden currently follows a methodology that includes the use of guideline values, which are not valid for a number of sites. As an alternative to the use of guideline values, the use of a detailed site-specific approach requires an understanding of the bioavailability in soil and sediment.
Kærgård Plantage is one of the most widely publicized contaminated sites in Denmark, and is often referred to as a "mega-site" because of the scale of the potential liabilities and breadth of wastes disposed at this shoreline location.
High levels of the chlorinated solvents tetrachloroethene (PCE) and trichloroethene (TCE) occur in groundwater beneath a manufacturing facility in southern Sweden. Regulatory authorities have required groundwater remediation, but Swedish environmental consultants have little direct experience with certain in situ remediation technologies.
This manufacturing facility in Lomazzo, Italy was originally developed in the 1930s as a factory for manufacturing shoe-making tools, and was enlarged over the next several years. Beginning in the 1960s, operations at the facility consisted primarily of production of thermostats, gas valves, sensors, and timers for a number of applications. Manufacturing activities included shearing and molding of metal coils. Processes at the facility involved the use of cooling/cutting oils and perchloroethylene (PCE) as a degreaser. Manufacturing operations at the facility have since been terminated.
Groundwater beneath the Høfde 42 Harboøre Tange site is contaminated with some of the highest concentrations of organophosphorus pesticide wastes found anywhere in the world. From 1957 to 1962, pesticides and pesticide manufacturing wastes from a neighboring agrichemical plant were discharged to sand dunes at this site, which is located on the shore of the North Sea on the western coast of Denmark. Today, an estimated 267 tons of pesticides and pesticide manufacturing wastes remain at the site, primarily consisting of the highly toxic chemicals parathion, methyl parathion, and malathion. Largely immiscible in water, much of the pesticide contamination at the site is present as a dense, nonaqueous phase liquid (DNAPL). The site groundwater is highly acidic (pH of 3 to 4), and the groundwater toxicity is further increased by the presence of an estimated 60 Kg of mercury that is co-mingled with the pesticide wastes.
Groundwater supplies at many locations throughout Denmark have been impacted by chlorinated solvents including tetrachloroethene (PCE), trichloroethene (TCE), and 1,1,1-trichloroethane (1,1,1-TCA). Much of the contamination has occurred due to releases from dry cleaning facilities, and solvent plumes are often found in residential neighborhoods. As a result, private and public stakeholders in Denmark are focusing increasingly on cost-effective remediation technologies.
This site was originally developed in the mid-1800s for the production of linseed oil. In the 1900s, manufacturing operations included leather tanning and the production of belts and hoses. Contaminants at the property include chlorinated solvents and mineral oil in soil and groundwater, and metals (chrome and zinc) in shallow soils. Geosyntec's client acquired the facility in the 1960s and sold it in the 1990s. The current owner is assessing options for remediation associated with soil and groundwater contamination. Geosyntec is assisting our client with identifying appropriate response actions and cost allocations for contamination that may have occurred during the period that the client owned and operated the facility.
Optimizing and completing post-closure care (PCC), or aftercare, of closed MSW landfills in Europe is a major issue facing SITA, the waste services arm of Suez Environnement. Working with the French Agency for the Environment and Energy (ADEME), Suez and SITA turned to Geosyntec to investigate application of the performance-based Evaluation of Post-Closure Care (EPCC) Methodology in Europe. The EPCC Methodology was developed by Geosyntec to evaluate optimizing and ending PCC at MSW landfills regulated under RCRA Subtitle D in the U.S. Procedurally, the methodology is based on assessment that a closed landfill that no longer represents a threat to human health and the environment. Assessing landfill monitoring and management requirements in terms of maintaining functional stability allows care activities to be progressively reduced until no active care is necessary and only de minimus custodial care activities remain for passive control systems (mainly for the cover).
Geosyntec Consultants (Geosyntec) Ireland office (formerly Ford Consulting Group) has been retained by this client who has been required under IPPC to address contaminated soil and groundwater issues at their manufacturing site in Ireland. The project objectives have migrated from providing peer review to leading a detailed site characterization study and risk assessment in addition to performing laboratory and field based remedial trials. These are anticipated to lead to full-scale corrective action over a two year period.
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