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The Innovative Technology Demonstration (ITD) program at Tinker Air Force Base (TAFB), Oklahoma City, Oklahoma, will demonstrate the overall utility and effectiveness of innovative technologies for site characterization, monitorin...
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The Innovative Technology Demonstration (ITD) program at Tinker Air Force Base (TAFB), Oklahoma City, Oklahoma, will demonstrate the overall utility and effectiveness of innovative technologies for site characterization, monitoring, and remediation of selected contaminated test sites. The current demonstration test sites include a CERCLA site on the NPL list, located under a building (Building 3001) that houses a large active industrial complex used for rebuilding military aircraft, and a site beneath and surrounding an abandoned underground tank vault used for storage of jet fuels and solvents. The site under Building 3001 (the NW Test Site) is contaminated with TCE and Cr(sup (plus)6); the site with the fuel storage vault (the SW Tanks Site) is contaminated with fuels, BTEX and TCE. These sites and others have been identified for cleanup under the Air Force's Installation Restoration Program (IRP). This document describes the demonstrations that have been conducted or are planned for the TAFB.
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Environmental Management Operations (EMO) is conducting an Innovative Technology Demonstration Program for Tinker Air Force Base (TAFB). Several innovative technologies are being demonstrated to address specific problems associate...
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Environmental Management Operations (EMO) is conducting an Innovative Technology Demonstration Program for Tinker Air Force Base (TAFB). Several innovative technologies are being demonstrated to address specific problems associated with remediating two contaminated test sites at the base. Cone penetrometer testing (CPT) is a form of testing that can rapidly characterize a site. This technology was selected to evaluate its applicability in the tight clay soils and consolidated sandstone sediments found at TAFB. Directionally drilled horizontal wells was selected as a method that may be effective in accessing contamination beneath Building 3001 without disrupting the mission of the building, and in enhancing the extraction of contamination both in ground water and in soil. A soil gas extraction (SGE) demonstration, also known as soil vapor extraction, will evaluate the effectiveness of SGE in remediating fuels and TCE contamination contained in the tight clay soil formations surrounding the abandoned underground fuel storage vault located at the SW Tanks Site. In situ sensors have recently received much acclaim as a technology that can be effective in remediating hazardous waste sites. Sensors can be useful for determining real-time, in situ contaminant concentrations during the remediation process for performance monitoring and in providing feedback for controlling the remediation process. Following the SGE demonstration, the SGE system and SW Tanks test site will be modified to demonstrate bioremediation as an effective means of degrading the remaining contaminants in situ. The bioremediation demonstration will evaluate a bioventing process in which the naturally occurring consortium of soil bacteria will be stimulated to aerobically degrade soil contaminants, including fuel and TCE, in situ.
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Currently, several innovative technologies are being demonstrated at Tinker Air Force Base (TAFB) to address specific problems associated with remediating two contaminated test sites at the base. Cone penetrometer testing (CPT) is...
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Currently, several innovative technologies are being demonstrated at Tinker Air Force Base (TAFB) to address specific problems associated with remediating two contaminated test sites at the base. Cone penetrometer testing (CPT) is a form of testing that can rapidly characterize a site. This technology was selected to evaluate its applicability in the tight clay soils and consolidated sandstone sediments found at TAFB. Directionally drilled horizontal wells have been successfully installed at the US Department of Energy's (DOE) Savannah River Site to test new methods of in situ remediation of soils and ground water. This emerging technology was selected as a method that may be effective in accessing contamination beneath Building 3001 without disrupting the mission of the building, and in enhancing the extraction of contamination both in ground water and in soil. A soil gas extraction (SGE) demonstration, also known as soil vapor extraction, will evaluate the effectiveness of SGE in remediating fuels and TCE contamination contained in the tight clay soil formations surrounding the abandoned underground fuel storage vault located at the SW Tanks Site. In situ sensors have recently received much acclaim as a technology that can be effective in remediating hazardous waste sites. Sensors can be useful for determining real-time, in situ contaminant concentrations during the remediation process for performance monitoring and in providing feedback for controlling the remediation process. A demonstration of two in situ sensor systems capable of providing real-time data on contamination levels will be conducted and evaluated concurrently with the SGE demonstration activities. Following the SGE demonstration, the SGE system and SW Tanks test site will be modified to demonstrate bioremediation as an effective means of degrading the remaining contaminants in situ.
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Seventeen chemical stabilizers, rated as the most promising of those tested in earlier laboratory studies, were applied to test plots on a uranium mill tailings pile at the American Nuclear Corporation-Gas Hills Project mill site ...
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Seventeen chemical stabilizers, rated as the most promising of those tested in earlier laboratory studies, were applied to test plots on a uranium mill tailings pile at the American Nuclear Corporation-Gas Hills Project mill site in central Wyoming. The durability of these materials when exposed to actual site conditions was evaluated over time. In addition, eight commercially available windscreens were field tested. Test panels of the eight materials were constructed at the Wyoming site to compare their relative resistance to weathering. A second test was conducted near Pacific Northwest Laboratory to evaluate the effectiveness of the windscreens at reducing wind velocity. Results of the field tests on the chemical stabilizers and windscreens are presented in this report, along with effectiveness-versus-cost information. Direct comparison of these two dust control methods is difficult due to the dependence of each on site-specific factors. However, simplified model case studies were developed to assess the cost of chemical stabilization versus windscreen systems for a hypothetical, inactive tailings pile.
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Pacific Northwest Laboratory, under contract to the U.S. Nuclear Regulatory Commission's Office of Nuclear Regulatory Research, is investigating techniques to control fugitive dust emissions from active uranium mill tailings piles...
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Pacific Northwest Laboratory, under contract to the U.S. Nuclear Regulatory Commission's Office of Nuclear Regulatory Research, is investigating techniques to control fugitive dust emissions from active uranium mill tailings piles. This report describes laboratory tests conducted to evaluate 45 commercially available chemical stabilizers. Tests were conducted in a wind tunnel to evaluate the effectiveness and durability of the stabilizers under similar conditions. The effects of application rate, temperature (freeze/thaw) cycling, wet/dry cycling, and wind speed were determined. In addition, tests were conducted to determine the effects of ultraviolet light and water erosion on the durability of the stabilizers. Permeability tests were also conducted to determine the potential effect of each stabilizer on the overall stability of the tailings pile. Results of these laboratory tests indicated that 16 of the stabilizers were equally effective and more durable than the others.
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Field and laboratory measurements were made to test the validity of methods for calculating radon-flux attenuation through earthen covers as described in A Handbook for the Determination of Radon Attenuation Through Cover Material...
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Field and laboratory measurements were made to test the validity of methods for calculating radon-flux attenuation through earthen covers as described in A Handbook for the Determination of Radon Attenuation Through Cover Materials, NUREG/CR-3533. The validity of the diffusion equations presented in the handbook was established by the generally good agreement between the measured radon flux at six field sites and the flux predicted when measured properties of soil underlying these sites were used in these equations. When approximate values presented in the handbook for various soil properties were used in the diffusion equations, the predicted fluxes were larger than the measured values by factors of up to 31. However, investigation of the theoretical relationship between the radon flux from an earth-covered tailings pile and the thickness of that cover indicated that the latter would only be overestimated by a factor of up to 1.5 at field sites similar to those examined in this study.
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Pacific Northwest Laboratory (PNL), has developed an asphalt emulsion cover system to reduce the release of radon from uranium mill tailings. The system has been field-tested at the tailings site in Grand Junction, Colorado. Resul...
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Pacific Northwest Laboratory (PNL), has developed an asphalt emulsion cover system to reduce the release of radon from uranium mill tailings. The system has been field-tested at the tailings site in Grand Junction, Colorado. Results from laboratory and field tests indicate that this system effectively reduces radon release to near-background levels (< 2 pCi m exp -2 s exp -1 ) and has the properties required for long-term effectiveness and stability. Engineering specifications have been developed, and a cost analysis indicates that asphalt emulsion covers are competitive with other cover systems. 6 references, 2 figures, 4 tables. (ERA citation 09:016078)
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A field test was conducted on a uranium tailings pile (Federal American Partners Uranium Mill, Gas Hills, Wyoming) to evaluate the effectiveness of 15 chemical stabilizers for control of fugitive dust from uranium mill tailings. F...
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A field test was conducted on a uranium tailings pile (Federal American Partners Uranium Mill, Gas Hills, Wyoming) to evaluate the effectiveness of 15 chemical stabilizers for control of fugitive dust from uranium mill tailings. Fourteen of the stabilizers were applied with a field spray system, one was applied with a hydroseeder. After 1 year of monitoring, all of the stabilizers have degraded to some degree; but those applied at the manufacturers' recommended rate are still somewhat effective in reducing fugitive emissions. The following synthetic polymer emulsions appear to be the more effective stabilizers Wallpol 40-133 (Reicnold Chemicals), SP-400 (Johnson and March Corporation), and CPB-12 (Wen Don Corporation). Installed costs for the test plots ranged from $8400 to $11,300 per hectare, depending on the cost of the stabilizers. Large-scale stabilization costs of the test materials are expected to range from $680 to $3600/ha, based on FAP experience. Evaluation of the chemical stabilizers will continue for about one year.
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An immediate concern associated with the disposal of uranium mill tailings is that wind erosion of the tailings from an impoundment area will subsequently deposit tailings on surrounding areas. Pacific Northwest Laboratory (PNL), ...
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An immediate concern associated with the disposal of uranium mill tailings is that wind erosion of the tailings from an impoundment area will subsequently deposit tailings on surrounding areas. Pacific Northwest Laboratory (PNL), under contract to the U.S. Nuclear Regulatory Commission, is investigating the current technology for fugitive dust control. Different methods of fugitive dust control, including chemical, physical, and vegetative, have been used or tested on mill tailings piles. This report presents the results of a literature review and discussions with manufacturers and users of available stabilization materials and techniques.
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A 6.4-mm thick Armak E-63 cationic asphalt emulsion-Vitro subsoil seal was capable of preventing permeation of RaCl sub 2 in 0.5 N HCl solution, radon, and nitrogen under 3.6 kg/cm exp 2 (50 psi) overpressure for a 17-day period. ...
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A 6.4-mm thick Armak E-63 cationic asphalt emulsion-Vitro subsoil seal was capable of preventing permeation of RaCl sub 2 in 0.5 N HCl solution, radon, and nitrogen under 3.6 kg/cm exp 2 (50 psi) overpressure for a 17-day period. (ERA citation 02:042709)
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