contaminant migration Articles
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Technical Bulletin: Multilevel Sampling
The topic of this CL:AIRE Technical Bulletin is multilevel sampling systems for characterising contaminated groundwater. Contaminated groundwater can present considerable problems for landowners: it can occur at significant depth, sources of the contamination are not often obvious, it can migrate from one property to another, and groundwater flow directions can be altered due to seasonal ...
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Comparison of Eight Innovative Site Characterization Tools Used to Investigate
Environmental assessment of contaminated sites often requires delineation of the pathways of contaminant migration. Often, the pathways are strongly affected by the subsurface geology. At Vandenberg AFB in California, an accidental release of gasoline containing MTBE occurred at a base gasoline station in 1994. Dissolution of the gasoline into groundwater has created a dissolved MTBE plume at ...
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Containment for Ground Water, Surface Water, And Leachate
Containment measures are often performed to prevent, or significantly reduce, the migration of contaminants in soils or ground water. Containment is necessary whenever contaminated materials are to be buried or left in place at a site. In general, containment is performed when extensive subsurface contamination at a site precludes excavation and removal of wastes because of potential hazards ...
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Site Remediation Public Notifications – Round 2
As you all are aware, NJDEP revised the Technical Requirements for Site Remediation (TRSR) a few years ago to include “Notification and Public Outreach” procedures (NJAC 7:26E-1.4). The rule requires the person responsible for conducting the remediation of a contaminated site to perform various public notifications and outreach activities, the majority of which had to be completed ...
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Using Cl-Out to Finish Remediation Following Chemical Oxidation
CL-Out was used to complete the remediation of ground water contaminated by chlorinated solvents from a former dry cleaning site in Rockville, Maryland. The ground water contamination had migrated from leaking sewer lines to underlying bedrock fractures. Fenton’s Reagent was first applied to the site, but the PCE concentrations increased due to desorption. Subsequently, sodium ...
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Containment for Soil, Sediment, and Sludge
Containment treatments are often performed to prevent, or significantly reduce, the migration of contaminants in soils or ground water. Containment is necessary whenever contaminated materials are to be buried or left in place at a site. In general, containment is performed when extensive subsurface contamination at a site precludes excavation and removal of wastes because of potential hazards, ...
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Assessing the transport and fate of MTBE
Untitled Document Abstract The ether oxygenates MTBE and TAME have been used in petroleum fuel formulations in the UK since the mid-1980s and have led to contamination of major aquifers with these chemicals, including the Chalk aquifer of southern England. An assessment is made of the controls on the fate of MTBE and BTEX compounds at a contaminated site on the Chalk aquifer, ...
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CONTROLLED RECOGNIZED ENVIRONMENTAL CONCERNS (CRECs)
A client recently said to me; “It seems like every year environmental requirements become more stringent and costly, making more purchasers and lenders request environmental inspections before committing to the real estate transaction”. Environmental Site Assessments (ESAs) or Phase I ESAs are the industry standard for assessing a parcel of property environmental quality and part of ...
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New Perimeter Air Monitoring Guidelines Expected Soon in New Jersey
This summer, the New Jersey Department of Environmental Protection (NJDEP) is expected to introduce a long-anticipated guidance document on perimeter air monitoring. The guidance will apply to sites for which an NJDEP spill case has been generated, placing them under regulation of the Contaminated Site Remediation and Redevelopment Program unit (formerly referred to as the Site Remediation ...
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Nyack MGP Site (Isotec Case Study 29)
Site Location: Nyack, NY Contamination: Bedrock contaminated with non-aqueous phase liquid (NAPL) and MGP-related compounds. Primary contaminants of concern (COCs) include volatile organic compounds (VOCs), Poly-nuclear aromatic hydrocarbons (PAH's) and total petroleum hydrocarbons (TPH). Levels of COCs reached 6 mg/l for VOCs and 1,200 mg/l for PAHs in the dissolved phase and 8,500 mg/l for ...
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Proposed PERC Ban Tabled Until 2026
Landlord’s who may have been hoping for a boost from the NJDEP in their efforts to convince their dry cleaning tenants to switch from perchloroethylene (PERC) to alternative less toxic cleaning technologies, recently received a set back. The NJDEP retracted proposed regulations that have been under review for the last several years that not only mandated a switch to dry cleaning equipment ...
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Identification of source of heavy metal contamination in a site - a case study
Accidental spills and improper disposal of industrial effluent/sludge containing heavy metals onto the open land or into subsurface result in soil and water contamination. Detailed investigations are carried out to identify the source of contamination of heavy metals in an industrial suburb near Bangalore in India. Detailed investigation of ground water and subsurface soil analysis for various ...
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Environmental Insurance: Finding a Good Tailor
An article by this author in the December 1999 issue of Brownfield News analyzed two new environmental insurance products, the cleanup cost cap and pollution liability policies, which have proven to be key factors in the success of some contaminated property transactions. The article explained that, to achieve this success, environmental insurance experts need to tailor the policy to the ...
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High-Resolution Site Characterization with Multilevel Systems
Within the last few years, the U.S. EPA added a new focus area on high-resolution site characterization (HRSC) to their Contaminated Site Clean-Up Information (CLU-IN) website. The U.S. EPA’s definition of HRSC is: “High-resolution site characterization (HRSC) strategies and techniques use scale-appropriate measurement and sample density to define contaminant distributions, and the ...
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DNAPL stabilization using Organoclay at superfund site in Virigina - Case Study
The Atlantic Wood Industries (AWI) site is approximately 48 acres of land on the industrialized waterfront of Portsmouth, Virginia, along the Southern Branch of the Elizabeth River. From 1926 to 1992, a woodtreating facility operated at the site using both creosote and pentachlorophenol (PCP). Project Details Atlantic Woods Industries CQA Engineer: EA Engineering, Science and Technology ...
By CETCO
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Multiparameter Sonde Used in Combined-Remedy Approach Saves $200,000 in Potential Costs
A former dry-cleaning site in the Pacific Northwest Ultra Custom Care Cleaners, was found to be contaminated with PCE (perchloroethylene). According to the U.S. Geological Survey (USGS), PCE was widely used in the dry cleaning of fabrics since the 1940s. PCE is one of the most frequently detected VOCs (volatile organic carbons) in groundwater at a national scale (Moran 2004). PCE is highly ...
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A Citizen`s Guide to Natural Attenuation
What is natural attenuation?Natural attenuation makes use of natural processes to contain the spread of contamination from chemical spills and reduce the concentration and amount of pollutants at contaminated sites. Natural attenuation—also referred to as intrinsic remediation, bioattenuation, or intrinsic bioremediation—is an in situ treatment method. This means that environmental contaminants ...
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Vapor Intrusion: Risks and Challenges
Vapor Intrusion (VI), defined as the migration of volatile contaminants from the subsurface into the indoor air of overlying buildings, is a major and challenging environmental issue for both regulators and the regulated community—one that continues to elicit heated debate among stakeholders. Eight factors associated with the VI pathway that contribute to its challenging nature are discussed ...
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Excavation, Retrieval, and Off-Site Disposal
Introduction: Contaminated material is removed and transported to permitted off-site treatment and/or disposal facilities. Some pretreatment of the contaminated media usually is required in order to meet land disposal restrictions. Confined disposal facilities (CDFs) are engineered structure enclosed by dikes and designed to retain dredged materials. A CDF may have a large cell for material ...
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Multiparameter sonde used in combined remedy approach and saves $200,000 in potential costs - Case Study
A former dry-cleaning site in the Pacific Northwest, Ultra Custom Care Cleaners, was found to be contaminated with PCE (perchloroethylene). According to the U.S. Geological Survey (USGS), PCE was widely used in the dry cleaning of fabrics since the 1940s. PCE is one of the most frequently detected VOCs (volatile organic carbons) in groundwater at a national scale (Moran 2004). PCE is highly ...
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