6,498 Matching Results

Search Results

Advanced search parameters have been applied.

in subjects: "Remedial Action"

open access

Operable Unit 3-13, Group 3, Other Surface Soils (Phase I) Remedial Action Report

This Remedial Action Report summarizes activities undertaken to remediate the Operable Unit 3-13, Group 3, Other Surface Soils, Phase I sites at the Idaho Nuclear Technology and Engineering Center at the Idaho National Laboratory Site. The 10 sites addressed in this report were defined in the Operable Unit 3-13 Record of Decision and subsequent implementing documents. This report concludes that remediation requirements and cleanup goals established for these 10 sites have been accomplished and … more

Date: July 31, 2007

Creator: Davison, L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

New Pump and Treat Facility Remedial Action Work Plan For Test Area North Final Groundwater Remediation, Operable Unit 1-07B

This remedial action work plan identifies the approach and requirements for implementing the medial zone remedial action for Test Area North, Operable Unit 1-07B, at the Idaho National Laboratory. This plan details the management approach for the construction and operation of the New Pump and Treat Facility (NPTF). As identified in the remediatial design/remedial action scope of work, a separate remedial design/remedial action work plan will be prepared for each remedial component of the Operab… more

Date: June 12, 2007

Creator: Nelson, L. O.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Operable Unit 3-13, Group 7, SFE-20 Hot Waste Tank System Remedial Action Report

This Remedial Action Report summarizes activities undertaken to remediate the Operable Unit 3-13, Group 7, SFE-20 Hot Waste Tank System at the Idaho Nuclear Technology and Engineering Center at the Idaho National Laboratory Site. The site addressed in this report was defined in the Operable Unit 3-13 Record of Decision and subsequent implementing documents. This report concludes that remediation requirements and cleanup goals established for the site have been accomplished and is hereafter cons… more

Date: June 30, 2009

Creator: Davison, Lee

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Containment of toxic metals and radionuclides in porous and fractured media: Optimizing biogeochemical reduction versus geochemical oxidation. 1998 annual progress report

'The purpose of this research is to provide an improved understanding and predictive capability of the mechanisms that allow metal-reducing bacteria to be effective in the bioremediation of subsurface environments contaminated with toxic metals and radionuclides. The study is motivated by the likelihood that subsurface microbial activity can effectively alter the redox state of toxic metals and radionuclides so that they are immobilized for long time periods. The objectives are to: (1) develop … more

Date: June 1, 1998

Creator: Jardine, P. M. & Brooks, S. C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Behavior of dense, immiscible solvents in fractured clay-rich soils. 1998 annual progress report

'This research project addresses the nature and and distribution of DNAPL sources (typically chlorinated solvents) in fractured clays or shales and the potential for natural attenuation of plumes derived from these sources. Specific goals include: (1) determining whether typical DNAPLs can penetrate fractures and the fine-grained matrix pore structure for head values within the range expected for a typical DNAPL spill; (2) investigate methods of measuring or estimating fracture or matrix entry … more

Date: June 1, 1998

Creator: Mckay, L. D.; Sanseverino, J.; Jardine, P. M.; Brooks, S. C.; Cherry, J. A. & Parker, B. L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Stable isotopic investigations of in-situ bioremediation of chlorinated organic solvents. 1998 annual progress report

'Contamination of soils and groundwaters with chlorinated aliphatic hydrocarbons (CAHs) is one of the most serious environmental problems in the DOE system and in the nation at large. These compounds are designated as priority pollutants by the US Environmental Protection Agency (EPA) and are known or suspected to be carcinogenic or mutagenic in humans. These compounds are readily transported by groundwater and are not reduced to acceptable concentrations for human consumption by most municipal… more

Date: June 1, 1998

Creator: Sturchio, N.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The migration and entrapment of DNAPLs in physically and chemically heterogeneous porous media. Annual progress report, September 15, 1996--August 25, 1997

'The overall objective of this research is to investigate the influence of coupled physical and chemical heterogeneity on the migration and entrapment of DNAPLs in the saturated zone. This research includes laboratory and numerical investigations for a matrix of fluid and solid properties encompassing a range of wettability characteristics. Specific objectives include: (1) quantification of medium wettability and interfacial tensions; (2) determination of hydraulic property relations; (3) two-d… more

Date: January 1, 1997

Creator: Abriola, L.M. & Demond, A.H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

In situ, field scale evaluation of surfactant enhanced DNAPL recovery using a single-well, push-pull test. 1998 annual progress report

'The overall goal of this project is to develop the single-well, push-pull test method as a new site characterization and feasibility assessment tool for studying the fundamental fate and transport behavior of injected surfactants and their ability to solubilize and mobilize dense nonaqueous phase liquids (DNAPLs) in the subsurface. The specific objectives are: (1) to develop a modified push-pull test for use in identifying and quantifying the effects of sorption, precipitation, and biodegradat… more

Date: June 1, 1998

Creator: Istok, J.D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Stable isotopic investigations of in situ bioremediation of chlorinated organic solvents. 1997 annual progress report

'The author has made significant progress in developing innovative methods for investigating the mechanism and extent of in situ bioremediation of chlorinated organic solvents. These methods use precise isotopic ratio measurements of chlorine and carbon in reactant and product species in laboratory experiments and in materials from field demonstration sites. Specific tasks completed during FY 1997 include: (1) refinement and publication of a new analytical method for precise determination of ch… more

Date: January 1, 1997

Creator: Sturchio, N.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Behavior of dense immiscible solvents in fractured clay-rich soils. Technical progress report, 1997

'The overall goal of the research program is to develop a better understanding of the physical and chemical factors and processes influencing fate and transport of immiscible and dissolved-phase dense solvents in groundwater in fractured, highly weathered clays and shales. These widespread materials are much different, physically and chemically, from granular soils or fractured low porosity rocks, which are the media used for most previous investigations of solvent behavior. The investigations … more

Date: October 13, 1997

Creator: McKay, L.D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Reduction and immobilization of radionuclides and toxic metal ions using combined zero valent iron and anaerobic bacteria. 1998 annual progress report

'Previous research findings indicate that both zero valent iron and sulfate reducing bacteria (SRB) can yield significant decreases in Cr(VI) or U(VI) concentrations due to abiotic and microbial reduction, respectively. The major hypothesis associated with this research project is that a combined abiotic-biological system can synergistically combine both processes to maximize metal ion reduction in an engineered permeable reactive barrier. The overall goal of this project is to design a combine… more

Date: June 1, 1998

Creator: Weathers, L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The migration and entrapment of DNAPLs in physically and chemically heterogeneous porous media. 1998 annual progress report

'The migration and entrapment of dense nonaqueous phase liquids (DNAPLs) at hazardous waste sites is typically believed to be controlled by physical heterogeneities. This belief is based upon the assumption that permeability and capillary properties are determined by soil texture. These transport properties however, also depend on porous media wettability characteristics, which may vary spatially in a formation due to variations in aqueous phase chemistry, contaminant aging, and/or variations i… more

Date: June 1, 1998

Creator: Abriola, L.M. & Demond, A.H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Advanced experimental analysis of controls on microbial Fe(III) oxide reduction. 1998 annual progress report

'Understanding factors which control the long-term survival and activity of Fe(III)-reducing bacteria (FeRB) in subsurface sedimentary environments is important for predicting their ability to serve as agents for bioremediation of organic and inorganic contaminants. This project seeks to refine the authors quantitative understanding of microbiological and geochemical controls on bacterial Fe(III) oxide reduction and growth of FeRB, using laboratory reactor systems which mimic to varying degrees… more

Date: June 1, 1998

Creator: Roden, E.E. & Urrutia, M.M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

In-situ characterizations of dense non-aqueous phase liquids using partitioning tracers. Annual progress report, September 15, 1996--September 14, 1997

'This paper describes laboratory research conducted to investigate the use of partitioning tracers for the detection, volume estimation, and remediation performance assessment of vadose zones contaminated by nonaqueous phase liquids (NAPLs). These laboratory studies used Ottawa sand and field soil packed columns. The columns were saturated, then reduced to residual saturations of water and NAPL, creating a three phase system of air, water, and NAPL. Conservative and partitioning gas tracers wer… more

Date: January 23, 1998

Creator: Pope, G. A.; McKinney, D. C.; Gupta, A. D.; Jackson, R. E. & Jin, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Physics of DNAPL migration and remediation in the presence of heterogeneities. 1998 annual progress report

'The goal of the research is to develop a fundamental quantitative understanding of the role of physical heterogeneities on DNAPL migration and remediation in aquifers. Such understanding is critical to cost effectively identify the location of the subsurface zone of contamination and design remediation schemes focused on removing the source of the contamination, the DNAPL itself. To reach this goal, the following objectives for the proposed research are defined: Objective 1: Develop fundamenta… more

Date: June 1, 1998

Creator: Conrad, S. & Glass, R.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Advanced experimental analysis of controls on microbial Fe(III) oxide reduction. First year progress report

'The authors have made considerable progress toward a number of project objectives during the first several months of activity on the project. An exhaustive analysis was made of the growth rate and biomass yield (both derived from measurements of cell protein production) of two representative strains of Fe(III)-reducing bacteria (Shewanellaalga strain BrY and Geobactermetallireducens) growing with different forms of Fe(III) as an electron acceptor. These two fundamentally different types of Fe(… more

Date: July 1, 1997

Creator: Roden, E.E. & Urrutia, M.M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Development of radon-222 as a natural tracer for monitoring the remediation of NAPL contamination in the subsurface. 1998 annual progress report

'The objective of this research is to develop a unique method of using naturally occurring radon-222 as a tracer for locating and quantitatively describing the presence of subsurface NAPL contamination. The research will evaluate using radon as an inexpensive, yet highly accurate, means of detecting NAPL contamination and assessing the effectiveness of NAPL remediation. Laboratory, field, and modeling studies are being performed to evaluate this technique, and to develop methods for its success… more

Date: June 1, 1998

Creator: Semprini, L. & Istok, J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Partitioning tracers for in situ detection and quantification of dense nonaqueous phase liquids in groundwater systems. 1998 annual progress report

'The overall goal of the proposed project is to explore the use of an innovative in-situ method for the detection and quantification of dense nonaqueous phase liquids (DNAPLs) in water-saturated and unsaturated heterogeneous media. Effective risk assessment and remediation of DNAPL contaminated sites is constrained by the limitations of current site characterization techniques. A major weakness of the current methods is that they provide data at discrete points, such that the probability of sam… more

Date: June 1, 1998

Creator: Brusseau, M. L.; White, M.; Nelson, N. & Oostrom, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Microbial mineral transformations at the Fe(II)/Fe(III) redox boundary for solid phase capture of strontium and other metal/radionuclide contaminants. 1998 annual progress report

'The Research objectives of this report are to determine microbiological and geochemical controls on carbonate mineral preciptation reactions, and identify contributions of these processes to the solid phase capture of strontium and other metal/radionuclide contaminants. The study is relevant to the development of new clean-up strategies for DOE sites where strontium and other metal/radionuclides exist as ubiquitous and often mobile contaminants. The work summarized in this report encompasses t… more

Date: June 1, 1998

Creator: Ferris, F. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Immobilization of toxic metals and radionuclides in porous and fractured media: Optimizing biogeochemical reduction versus geochemical oxidation. 1997 annual progress report

'The purpose of the authors research is to provide an improved understanding and predictive capability of the mechanisms that allow metal-reducing bacteria to be effective in the bioremediation of subsurface environments contaminated with toxic metals and radionuclides. The research findings of the work plan will (1) provide new insights into the previously unexplored areas of competing geochemical and microbiological oxidation/reduction reactions that govern the fate and transport of redox sen… more

Date: September 1, 1997

Creator: Jardine, P. M.; Brooks, S. C.; Saiers, J. E.; Phelps, T. J.; Zachara, J. & Fendorf, S. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Microbial mineral transformations at the Fe(II)/Fe(III) redox boundary for solid phase capture of strontium and other metal/radionuclide contaminants. Annual progress report, September 15, 1996--June 15, 1997

'The objectives of the project remain the same as those stated in the original proposal. Specifically, to determine microbiological and geochemical controls on carbonate mineral precipitation reactions that are caused by bacterial reduction of Fe(III)-oxides, and identify contributions of these processes to solid phase capture of strontium and other metal/radionuclide contaminants. The project on microbial mineral transformations at the Fe(II)/Fe(III) redox boundary for the solid phase capture … more

Date: January 1, 1997

Creator: Ferris, F. G. & Roden, E. E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Reduction and immobilization of radionuclides and toxic metal ions using combined zero valent iron and anaerobic bacteria. Year one technical progress report

'The objective of this project is to design a combined abiotic/microbial, reactive, permeable, in-situ barrier with sufficient reductive potential to prevent downgradient migration of toxic metal ions. The field-scale application of this technology would utilize anaerobic digester sludge, Fe(O) particles for supporting anaerobic biofilms, and suitable aquifer material for construction of the barrier. The major goals for Year 1 were to establish the sulfate reducing mixed culture, to obtain sour… more

Date: October 1, 1997

Creator: Weathers, L.J. & Katz, L.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

In-situ characterization of dense non-aqueous phase liquids uUsing partitioning tracers. 1998 annual progress report

'Major advances have been made during the past year in research on interwell partitioning tracers tests (PITTs). These advances include: (1) progress on the inverse problem of how to estimate the three-dimensional distribution of NAPL in aquifers from the tracer data, (2) the first ever partitioning tracer experiments in dual porosity media, (3) the first modeling of partitioning tracers in dual porosity media, (4) experiments with complex NAPLs such as coal tar, (5) the development of an accur… more

Date: June 1, 1998

Creator: Pope, G.A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Physics of DNAPL migration and remediation in the presence of heterogeneities. 1997 annual progress report

'The authors are in the process of conducting well-controlled laboratory experiments to better understand the physics of DNAPL migration and remediation in the presence of heterogeneities. These experiments are being used to develop and test an upscaled percolation model, a new approach for modeling DNAPL migration. In addition, numerical simulators under current use in evaluating remediation techniques will be compared against the remediation experiments. They are making use of their unique ex… more

Date: January 1, 1997

Creator: Conrad, S. & Glass, R.

Item Type: Report

Partner: UNT Libraries Government Documents Department