Site Characterization Articles
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Radiation source rate estimation through data assimilation of gamma dose rate measurements for operational nuclear emergency response systems
This paper presents an evaluation of an innovative data assimilation method that has been recently developed in NCSR Demokritos for estimating an unknown emission rate of radionuclides in the atmosphere, with real–scale experimental data. The efficient algorithm is based on the assimilation of gamma dose rate measured data in the Lagrangian atmospheric dispersion model DIPCOT and uses variational ...
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Model comparison in simulating the atmospheric dispersion of a pollutant plume in low wind conditions
This study investigates the performance of different air pollution dispersion models in low wind conditions. The models have been applied to two sites frequently characterised by weak winds: the cities of Modena and Reggio Emilia, in the Po River Valley (Northern Italy). The emission sources are the municipal waste incinerator (Modena) and a turbogas plant (Reggio Emilia). Total Suspended ...
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Soil and microbial characterisation and microbial–mediated iron release nearby landfills in Northwest Florida, USA
In this study, the soil of 16 landfills from 15 Northwest Florida counties was characterised through sieve analysis. On the basis of plate counts, it was found that there were around 3.0 × 104 to 9.5 × 105 Colony–Forming Units (CFU) per gram of soil for the soil of Northwest Florida. Through Polymerase Chain Reaction (PCR) analysis, Bacillus subtilis, Bacillus cereus, Bacillus thuringiensis and ...
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Metal‐based nanoparticles in soil: Fate, behavior, and effects on soil invertebrates
Metal‐based nanoparticles (NPs) (e.g., silver, zinc oxide, titanium dioxide, iron oxide) are being widely used in the nanotechnology industry. Because of the release of particles from NP‐containing products, it is likely that NPs will enter the soil compartment, especially through land application of sewage sludge derived from wastewater treatment. This review presents an overview of the ...
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Subsurface characterization using a D-optimality based pilot point method
Detailed hydraulic conductivity estimation is a difficult problem as the number of direct measurements available at a typical field site is relatively few and sparse. A common approach to estimate hydraulic conductivity is to combine direct hydraulic conductivity measurements with secondary measurements such as hydraulic head and tracer concentrations in an inverse modeling approach. Even with ...
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Environmental Data Management for Groundwater Contamination
ESdat environmental data management software has been used to manage and report on large datasets generated from an investigation of groundwater contamination on an industrial facility in Adelaide. ESdat was used in managing site data and the maintenance of conceptual model and time series outputs at a complex site over an extended period. Leakages of TCE and the subsequent groundwater ...
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Project profile - confidential client environmental remediation project Delray Beach, Florida
Background Levine Fricke Engineers (LFE), an environmental firm under contract to Blackstone Consultants LLC (Blackstone), was responsible for specifying and selecting a cleanup remedy for a former contaminated nursery site located in Delray Beach, Florida. LFE and Blackstone performed site characterization and demonstrated that site groundwater contained very high arsenic concentrations. ...
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Knowledge management for radioactive waste disposal: moving from theory to practice
The exponential growth in the knowledge base for radioactive waste management is a cause for concern in many national programmes. In Japan, this problem is exacerbated by a volunteering approach to siting of a deep geological repository, which requires particular flexibility in the tailoring of site characterisation plans, repository concepts and associated Performance Assessments (PAs). ...
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Isolate & sample up to 7 zones in one borehole
CMT Multilevel Systems isolate and monitor up to seven discrete zones in one borehole; monitor 7 zones in the 1.7" (43 mm) System; 3 in the narrow 1.1" (28 mm) System. Both options are low cost. The single tube design makes them fast and easy to drill and install in one day. System flexibility allows port locations and monitoring strategy to be finalized right on site. CMT wells are ideal for ...
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The Discrete Fracture Network (DFN) approach for contaminated bedrock site characterization
A comprehensive methodology known as the Discrete Fracture Network (DFN) Approach has been developed since the mid-1990’s as a framework for characterization of contaminated sites on fractured rock. This article provides an overview of the Approach and is followed by eight additional articles that describe the various methods that constitute this Approach. The ninth article also describes ...
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Unique applications of MMR to track preferential groundwater flow paths in dams, mines, environmental sites, and leach fields
Groundwater systems have been notoriously di!cult to map with high degrees of accuracy. As a result, not only have traditional geophysical methods proven inaccurate for groundwater characterization work, but they are often costly in terms of time, money, and environmental trauma. "is paper describes a unique application of magnetometric resistivity or MMR (Edwards and Nabighian, 1991) for ...
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Risk assessment and brownfields-determining exposure to site contaminants
The USEPA’s Brownfields Program was developed to facilitate the rehabilitation of contaminated property for re-development. EPA has set forth criteria that must be met for a revitalized property to be used for residential, commercial or industrial purposes. The main thrust of these criteria is the long-term protection of residents or visitors (including shoppers and business employees). As ...
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Monitoring of soil fertility
Background In agriculture and forestry soil fertility is a decisive factor for the economic use of fields and forests. Various factors, considered as a whole are the indicators which characterize the soil fertility. Important parameters are e.g.: Intensity of precipitation, air temperature, air humidity, soil humidity, suction power and soil temperature in various depths. Task The ...
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Chlorinated plume investigation
The initial survey of the AOC identified a source area of Trichloroethene (TCE) and the direction the plume was migrating in the groundwater. Three subsequent surveys were performed to identify additional source areas and to delineate the lateral extent of the plume, which was much greater than the client expected. The client's overall project costs were reduced significantly by effectively ...
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Chlorinated solvents
The initial PSG survey identified TCE source areas that did not agree with the GPR survey findings. Based on these results, a subsequent PSG survey was performed to further characterize the site and better define the source areas identified in the initial survey. Analytical results were provided to the client within four (4) days of receipt of samples at the laboratory for both surveys. The ...
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Green remediation best management practices: pump and treat technologies
Overview Pump and treat (P&T) technology typically is selected in a cleanup remedy to hydraulically contain contamination and/or restore an aquifer to beneficial use. Opportunities to reduce the energy and environmental footprint of a P&T remedy, which are available during site characterization and the remedy selection, design, construction, and operation phases, rely on effective planning and ...
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In Situ Remediation of Perchlorate in Soil and Groundwater, M.S. Thesis, California State University San Bernardino
This research project documents a technology assessment for in-situ bioremediation of perchlorate (ClO4-). The main goals are to compare methodologies, perform site characterization of soil and groundwater, and perform microcosm and bench scale tests. In this approach, perchlorate is reduced to chloride, requiring an electron donor. The suitability of electron donor amendments will be assessed ...
By Redox Tech
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A critique of the Department of Energy's environmental programme for the proposed high-level nuclear waste repository at Yucca Mountain, Nevada, USA
Legislative standards, regulatory provisions, and US Department of Energy (DOE) policies have defined the environmental programme to study the planned high-level nuclear waste repository site at Yucca Mountain, Nevada. The DOE has limited environmental data collection for purposes of monitoring and mitigating impacts of proposed characterisation activities and repository development. Most of the ...
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Landfill site characterisation at Kham Bon village, Muang district, Khon Kaen province, NE Thailand
The aim of the study is to characterise the Kham Bon landfill site. Hydrogeological and geochemical surveys were conducted and four boreholes were drilled. The hydraulic properties of the aquifer were tested, and soil, surface water and groundwater samples were collected at various times in the year. The physical and chemical properties of the samples, especially heavy metals, were analysed. The ...
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S2C2 Inc. utilizes EQuIS, RockWorks and ArcGIS implementing the Triad approach
When implementing the Triad Approach, S2C2 Inc. (S2C2) relies upon EarthSoft’s EQuIS,ESRI’s ArcGIS and Rockware’s RockWorks software toptimize the management andvisualization of large data sets. The USEPA’s Triad Approach incorporates the following threecomponents: systematic planning, real-time measurements and dynamic work strategies. Theprimary goal of this approach is tstreamline site ...
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