The Experts below are selected from a list of 144 Experts worldwide ranked by ideXlab platform
Frank E. Bains - One of the best experts on this subject based on the ideXlab platform.
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Use of Combined Air Sparging with Soil Vacuum Extraction and Groundwater Recovery and Treatment as Remedial Alternatives for Dissolved Chlorinated Hydrocarbons Recovery
1995Co-Authors: Raymond Sturdivant, Gary A. Fulton, Frank E. BainsAbstract:ABSTRACT Corrective action has been implemented to address a dissolved chlorinated hydrocarbons (CHCs) plume in the vicinity of a former basin at the Paxon Polymer Company facility located north of Baton Rouge, Louisiana. Assessment activities focused on the characterization of the geologic and hydrologic properties of the sediments underlying the area of investigation and the impact of the dissolved CHC plume to the soils and groundwater. Geologic characterization revealed that the facility is underlain by Quaternary age sediments consisting of mixtures of fine-grained sands, silt, and clay. Three hydrologic units were identified within the shallow sediments which are referred to as the Upper Permeable Zone, Second Permeable Zone, and Third Permeable Zone. The investigation focused on the impacted soils and groundwater of the Upper and Second Permeable Zones. The Upper and Second Permeable Zones were characterized hydrologically to determine the most applicable remedial alternative for addressing the dissolved CHC plume. Pilot tests consisting of soil vacuum extraction (SVE), combined air sparging with SVE (AS/SVE), and groundwater recovery were performed. Evaluation of these remedial technology alternatives resulted in the selection of the combined AS/SVE system alternative for the Upper Permeable Zone and the groundwater recovery alternative for the Second Permeable Zone. Recovered off-gas from the combined AS/SVE treatment system from the Upper Permeable Zone is treated through use of a granular activated carbon unit, while recovered groundwater from the Second Permeable Zone is treated by use of a low-profile air stripper.
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Use of combined air sparging and soil vacuum extraction (AS/SVE) and groundwater recovery and treatment as remedial alternatives for dissolved DNAPL recovery
AAPG Bulletin, 1995Co-Authors: Raymond Sturdivant, Gary A. Fulton, Frank E. BainsAbstract:Corrective action has been implemented to address a dissolved dense non-aqueous phase liquid (DNAPL) plume in the vicinity of a former waste impoundment at the Paxon Polymer Company facility, located north of Baton Rouge, Louisiana. Assessment activities focused on the characterization of the geologic and hydrologic properties of the sediments underlying the area of investigation and the impact of the dissolved DNAPL plume to the soils and groundwater. Geologic characterization revealed that the facility is underlain by Quaternary age sediments consisting of mixtures of fine-grained sands, silt, and clay. Two hydrologic units were identified within the shallow sediments which are referred to as the Upper Permeable Zone and Second Permeable Zone. The investigation focused on the impacted soils and groundwater of the Upper and Second Permeable Zones. The Upper and Second Permeable Zones were characterized hydrologically to determine the most applicable remedial alternative for addressing the dissolved DNAPL plume. Pilot tests consisting of soil vacuum extraction (SVE), combined air sparging with SVE (AS/SVE), and groundwater recovery were performed. Evaluation of these remedial technology alternatives resulted in the selection of the combined AS/SVE system alternative for the Upper Permeable Zone and the groundwater recovery alternative for the Second Permeable Zone. Recoveredmore » off-gas from the combined AS/SVE treatment system from the Upper Permeable Zone is treated through use of a granular activated carbon unit, while recovered groundwater form the Second Permeable Zone is treated by use of a low-profile air stripper.« less
Raymond Sturdivant - One of the best experts on this subject based on the ideXlab platform.
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Use of Combined Air Sparging with Soil Vacuum Extraction and Groundwater Recovery and Treatment as Remedial Alternatives for Dissolved Chlorinated Hydrocarbons Recovery
1995Co-Authors: Raymond Sturdivant, Gary A. Fulton, Frank E. BainsAbstract:ABSTRACT Corrective action has been implemented to address a dissolved chlorinated hydrocarbons (CHCs) plume in the vicinity of a former basin at the Paxon Polymer Company facility located north of Baton Rouge, Louisiana. Assessment activities focused on the characterization of the geologic and hydrologic properties of the sediments underlying the area of investigation and the impact of the dissolved CHC plume to the soils and groundwater. Geologic characterization revealed that the facility is underlain by Quaternary age sediments consisting of mixtures of fine-grained sands, silt, and clay. Three hydrologic units were identified within the shallow sediments which are referred to as the Upper Permeable Zone, Second Permeable Zone, and Third Permeable Zone. The investigation focused on the impacted soils and groundwater of the Upper and Second Permeable Zones. The Upper and Second Permeable Zones were characterized hydrologically to determine the most applicable remedial alternative for addressing the dissolved CHC plume. Pilot tests consisting of soil vacuum extraction (SVE), combined air sparging with SVE (AS/SVE), and groundwater recovery were performed. Evaluation of these remedial technology alternatives resulted in the selection of the combined AS/SVE system alternative for the Upper Permeable Zone and the groundwater recovery alternative for the Second Permeable Zone. Recovered off-gas from the combined AS/SVE treatment system from the Upper Permeable Zone is treated through use of a granular activated carbon unit, while recovered groundwater from the Second Permeable Zone is treated by use of a low-profile air stripper.
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Use of combined air sparging and soil vacuum extraction (AS/SVE) and groundwater recovery and treatment as remedial alternatives for dissolved DNAPL recovery
AAPG Bulletin, 1995Co-Authors: Raymond Sturdivant, Gary A. Fulton, Frank E. BainsAbstract:Corrective action has been implemented to address a dissolved dense non-aqueous phase liquid (DNAPL) plume in the vicinity of a former waste impoundment at the Paxon Polymer Company facility, located north of Baton Rouge, Louisiana. Assessment activities focused on the characterization of the geologic and hydrologic properties of the sediments underlying the area of investigation and the impact of the dissolved DNAPL plume to the soils and groundwater. Geologic characterization revealed that the facility is underlain by Quaternary age sediments consisting of mixtures of fine-grained sands, silt, and clay. Two hydrologic units were identified within the shallow sediments which are referred to as the Upper Permeable Zone and Second Permeable Zone. The investigation focused on the impacted soils and groundwater of the Upper and Second Permeable Zones. The Upper and Second Permeable Zones were characterized hydrologically to determine the most applicable remedial alternative for addressing the dissolved DNAPL plume. Pilot tests consisting of soil vacuum extraction (SVE), combined air sparging with SVE (AS/SVE), and groundwater recovery were performed. Evaluation of these remedial technology alternatives resulted in the selection of the combined AS/SVE system alternative for the Upper Permeable Zone and the groundwater recovery alternative for the Second Permeable Zone. Recoveredmore » off-gas from the combined AS/SVE treatment system from the Upper Permeable Zone is treated through use of a granular activated carbon unit, while recovered groundwater form the Second Permeable Zone is treated by use of a low-profile air stripper.« less
Gary A. Fulton - One of the best experts on this subject based on the ideXlab platform.
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Use of Combined Air Sparging with Soil Vacuum Extraction and Groundwater Recovery and Treatment as Remedial Alternatives for Dissolved Chlorinated Hydrocarbons Recovery
1995Co-Authors: Raymond Sturdivant, Gary A. Fulton, Frank E. BainsAbstract:ABSTRACT Corrective action has been implemented to address a dissolved chlorinated hydrocarbons (CHCs) plume in the vicinity of a former basin at the Paxon Polymer Company facility located north of Baton Rouge, Louisiana. Assessment activities focused on the characterization of the geologic and hydrologic properties of the sediments underlying the area of investigation and the impact of the dissolved CHC plume to the soils and groundwater. Geologic characterization revealed that the facility is underlain by Quaternary age sediments consisting of mixtures of fine-grained sands, silt, and clay. Three hydrologic units were identified within the shallow sediments which are referred to as the Upper Permeable Zone, Second Permeable Zone, and Third Permeable Zone. The investigation focused on the impacted soils and groundwater of the Upper and Second Permeable Zones. The Upper and Second Permeable Zones were characterized hydrologically to determine the most applicable remedial alternative for addressing the dissolved CHC plume. Pilot tests consisting of soil vacuum extraction (SVE), combined air sparging with SVE (AS/SVE), and groundwater recovery were performed. Evaluation of these remedial technology alternatives resulted in the selection of the combined AS/SVE system alternative for the Upper Permeable Zone and the groundwater recovery alternative for the Second Permeable Zone. Recovered off-gas from the combined AS/SVE treatment system from the Upper Permeable Zone is treated through use of a granular activated carbon unit, while recovered groundwater from the Second Permeable Zone is treated by use of a low-profile air stripper.
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Use of combined air sparging and soil vacuum extraction (AS/SVE) and groundwater recovery and treatment as remedial alternatives for dissolved DNAPL recovery
AAPG Bulletin, 1995Co-Authors: Raymond Sturdivant, Gary A. Fulton, Frank E. BainsAbstract:Corrective action has been implemented to address a dissolved dense non-aqueous phase liquid (DNAPL) plume in the vicinity of a former waste impoundment at the Paxon Polymer Company facility, located north of Baton Rouge, Louisiana. Assessment activities focused on the characterization of the geologic and hydrologic properties of the sediments underlying the area of investigation and the impact of the dissolved DNAPL plume to the soils and groundwater. Geologic characterization revealed that the facility is underlain by Quaternary age sediments consisting of mixtures of fine-grained sands, silt, and clay. Two hydrologic units were identified within the shallow sediments which are referred to as the Upper Permeable Zone and Second Permeable Zone. The investigation focused on the impacted soils and groundwater of the Upper and Second Permeable Zones. The Upper and Second Permeable Zones were characterized hydrologically to determine the most applicable remedial alternative for addressing the dissolved DNAPL plume. Pilot tests consisting of soil vacuum extraction (SVE), combined air sparging with SVE (AS/SVE), and groundwater recovery were performed. Evaluation of these remedial technology alternatives resulted in the selection of the combined AS/SVE system alternative for the Upper Permeable Zone and the groundwater recovery alternative for the Second Permeable Zone. Recoveredmore » off-gas from the combined AS/SVE treatment system from the Upper Permeable Zone is treated through use of a granular activated carbon unit, while recovered groundwater form the Second Permeable Zone is treated by use of a low-profile air stripper.« less
Katsuaki Koike - One of the best experts on this subject based on the ideXlab platform.
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Detection of Near-Surface Permeable Zones Based on Spatial Correlation Between Radon Gas Concentration and DTM-Derived Lineament Density
Natural Resources Research, 2020Co-Authors: Mohamad Nur Heriawan, Taiki Kubo, Ahmad Ali Syafi’i, Asep Saepuloh, Katsuaki KoikeAbstract:Radon-222 (Rn) concentrations in soil gas have been used to locate near-surface Permeable Zones (e.g., fractures, faults) along which hydrothermal fluids ascend in geothermal fields. However, Permeable Zone detection over a field is often difficult owing to limited numbers and locations of Rn data points. This study aims to develop methodology to enable the regional detection of Permeable Zones by multivariate geostatistical modeling of Rn concentrations using the Wayang Windu geothermal field (WWGF) in West Java, Indonesia as a model case. Rn concentrations were measured using sampled gases from 17 shallow drill holes with 3–5 m depth over a 5.30 × 9.20 km area. The measurements were repeated over five periods in 2016–2017. To supplement the Rn point data, we produced a digital terrain model with 20-m resolution using an unmanned aerial vehicle and extracted lineaments using the modified segment tracing algorithm (m-STA). Three types of lineament density maps with a grid-cell size of 0.25 × 0.25 km were prepared for the densities of lineament frequency (number), total length and number of intersections in a unit cell. The Rn concentrations measured during the five periods were mapped over the WWGF by the collocated cokriging method using Rn concentrations as the primary variable (point data) and lineament density as the secondary variable (within the grid-cell data). A fuzzy logic approach was then applied to assess permeability as an index of 0–1 by overlaying the estimated Rn concentrations and three types of lineament density. The detected Permeable Zones mainly overlap with the geothermal manifestations and regional faults, and the Permeable indexes generally correspond with Rn concentrations from eight new drill holes, which verify the effectiveness of the proposed method.
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estimation of regional groundwater system in a granitic body by 3d Permeable Zone modeling and flow simulation
2016Co-Authors: Taiki Kubo, Norihiro Matsuda, Koki Kashiwaya, Chunxue Liu, Katsuaki KoikeAbstract:Because clarifying a regional groundwater system is required for development and management of groundwater resources, it is important to evaluate the hydraulic property of a fracture system and alteration Zones which act as the pass of groundwater flow in a rock body. For a case study of such hydraulic characterization, we selected an area in which the basement rock is composed of Cretaceous granite. We first constructed a 3D fracture model by a geostatistical method to simulate the regional fracture distribution by incorporating the orientation of the sampled fracture data obtained from the borehole investigations, and this model revealed the features of this fracture system in that area. We then incorporated a dataset of hydraulic conductivity obtained from single borehole hydraulic tests and rock-core tests using a N2 gas permeameter and found a positive correlation with the size of simulated fractures. Finally, a numerical simulation using MODFLOW was applied to this hydraulic conductivity model for estimating the regional groundwater flow system. Anisotropic behavior of flows near the fault was revealed by this simulation.
Jean Schmittbuhl - One of the best experts on this subject based on the ideXlab platform.
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Pre- and post-stimulation characterization of geothermal well GRT-1, Rittershoffen, France: insights from acoustic image logs of hard fractured rock
Geophysical Journal International, 2016Co-Authors: Jeanne Vidal, Albert Genter, Jean SchmittbuhlAbstract:Geothermal well GRT-1 (Rittershoffen, Alsace) was drilled in 2012. Its open-hole section (extending down to a depth of 2.6 km) penetrated fractured sandstones and granite. In 2013, the well was subjected to Thermal, Chemical and Hydraulic (TCH) stimulation, which improved the injectivity index fivefold. The goal of the study was to assess the impact of the stimulation by comparing pre-and post-stimulation well-logging (acoustic and temperature [T] logs) and mud-logging data. This comparison revealed modifications of almost all the natural fractures. However, not all of these fractures are associated with permeability enhancement, and the post-stimulation T logs are important for characterizing this enhancement. Chemical alteration due to mechanical erosion at the tops and bottoms of the fractures was observed in the sandstones. These Zones display indications of very small new permeability after the TCH stimulation. Because a major fault Zone caved extensively where it crosses the borehole, it was not imaged in the acoustic logs. However, this originally Permeable Zone was enhanced as demonstrated by the T logs. Based on the natural injectivity of this fault Zone, hydraulic erosion and thermal microcracking of its internal quartz veins are associated with this permeability enhancement. Although local changes in the borehole wall observed in the acoustic images cannot be directly linked to the improved injectivity index, the comparison of the acoustic image logs allows for identification of fracture Zones impacted by the TCH stimulation.
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Self-induced seismicity due to fluid circulation along faults
Geophysical Journal International, 2014Co-Authors: Hideo Aochi, B. Poisson, Roger Toussaint, X. Rachez, Jean SchmittbuhlAbstract:In this article, we develop a system of equations describing fluid migration, fault rheology, fault thickness evolution and shear rupture during a seismic cycle, triggered either by tectonic loading or by fluid injection. Assuming that the phenomena predominantly take place on a single fault described as a finite Permeable Zone of variable width, we are able to project the equations within the volumetric fault core onto the 2D fault interface. From the basis of this “fault lubrication approximation”, we simulate the evolution of seismicity when fluid is injected at one point along the fault to model induced seismicity during an injection test in a borehole that intercepts the fault. We perform several parametric studies to understand the basic behaviour of the system. Fluid transmissivity and fault rheology are key elements. The simulated seismicity generally tends to rapidly evolve after triggering, independently of the injection history and end when the stationary path of fluid flow is established at the outer boundary of the model. This self-induced seismicity takes place in the case where shear rupturing on a planar fault becomes dominant over the fluid migration process. On the contrary, if healing processes take place, so that the fluid mass is trapped along the fault, rupturing occurs continuously during the injection period. Seismicity and fluid 2 migration are strongly influenced by the injection rate and the heterogeneity.