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Water-Level Monitoring Plan for the Hanford Groundwater Monitoring Project

Description: This document presents the water-level monitoring plan for the Hanford Groundwater Monitoring Project, conducted by the Pacific Northwest National Laboratory (PNNL). Water-level monitoring of the groundwater system beneath the Hanford Site is performed to fulfill the requirements of various state and federal regulations, orders, and agreements. The primary objective of this monitoring is to determine groundwater flow rates and directions. To meet this and other objectives, water-levels are meas… more
Date: September 7, 1999
Creator: McDonald, John P.; Chamness, Michele A. & Newcomer, Darrell R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Groundwater Fate and Transport Modeling for Texarkana Wood Preserving Company Superfund Site, Texarkana, Texas

Description: Fate and transport model results are presented for the Texarkana Wood Preserving Company (TWPC)superfund site. The conceptual model assumes two sources of contamination, specifically, the areas around the old and new process areas. Recent data show the presence of non-aqueous phase liquids (NAPL) in the aquifer that are also sources of dissolved contamination in the aquifer. A flow model was constructed and calibrated against measured hydraulic heads at permanent monitoring wells. Good matches … more
Date: August 1, 1999
Creator: Arnett, Ronald Chester
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Enhanced Reductive Dechlorination of TCE in a Basalt Aquifer

Description: A field evaluation of enhanced reductive dechlorination of trichloroethene (TCE) in ground water has been in progress since November 1998 to determine whether in situ biodegradation can be significantly enhanced through the addition of an electron donor (lactate). An in situ treatment cell was established in the residual source area of a large TCE plume in a fractured basalt aquifer utilizing continuous ground water extraction approximately 150 meters downgradient of the injection location. Aft… more
Date: April 1, 1999
Creator: Sorenson, Kent Soren; Peterson, Lance Nutting & Ely, R. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hydrogeological Analysis and Groundwater Flow for C-Reactor Area with Contaminant Transport for C-Reactor Seepage Basins (CRSB) and C-Area Burning/Rubble Pit (CBRP)

Description: A groundwater flow model encompassing approximately 4 mi2 within C Reactor area has been developed. The objectives and goals of the C Reactor Area groundwater model are to: Provide a common hydrogeologic and groundwater flow modeling framework for C Area that can be easily updated as additional field data is collected from waste site investigations. Provide a baseline groundwater flow model for use in subsequent flow and transport simulations for remedial/feasibility studies for C Area waste si… more
Date: December 1, 1999
Creator: FLACH, GREGORYP.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Manipulating Subsurface Colloids to Enhance Cleanup of DOE Waste Sites

Description: This project sought to: (1) understand the forces which immobilize colloids in aquifers, (2) devise aqueous solutions which disrupt these forces, and (3) test the effectiveness of colloid mobilization as a technique for removing colloids from the aquifer.
Date: June 1, 1999
Creator: Gschwend, Philip M.; Johnson, Carol R.; Nikolaidis,Nikolaos P. & Hellerich, Luca A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physics of DNAPL Migration and Remediation in the Presence of Heterogeneities

Description: The goal of our 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 fundamental… more
Date: June 1, 1999
Creator: Conrad, Stephen H. & Glass, Robert J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of Contaminant Transport Using Naturally Occurring U-Series Disequilibria

Description: The main goal of the research is to understand the migratory behavior of radioactive contaminants in subsurface fractured systems by using naturally occurring U-series radionuclides as tracers under in-situ physico-chemical and hydrogeologic conditions. Naturally-occurring uranium- and thorium-series radioactive disequilibria can provide information on the rates of adsorption-desorption and transport of radioactive contaminants as well as on fluid transport and rock dissolution in a natural set… more
Date: June 1, 1999
Creator: Murrell, Michael & Ku, Teh-Lung
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Aquifer Transport of Th, U, Ra and Rn in solution and on colloids

Description: We have completed a theoretical study of the U-Th and radioactive decay series in an aquifer (Tricca et al, in press). Using this model as a guide, we have reassessed our results on the aquifer associated with Brookhaven National Laboratory. Based on our study and analyses of the U-Th series nuclei in this aquifer and the theoretical results, it was considered mandatory that a new set of samples be acquired. In addition to data from the groundwater samples, information concerning the addition o… more
Date: June 1999
Creator: Wsserburg, G. J. & Baskaran, Mahalingam
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

How the K(d) Approach Undermines Groundwater Cleanup

Description: Environmental scientists have long appreciated that the distribution coefficient (the ''K{sub d}'' or ''constant K{sub d}'') approach predicts the partitioning of heavy metals between sediment and groundwater inaccurately; nonetheless, transport models applied to problems of environmental protection and groundwater remediation almost invariably employ this technique. To examine the consequences of this practice, we consider transport in one dimension of Pb and other heavy metals through an aqui… more
Date: July 19, 1999
Creator: Bethke, Craig M. & Brady, Patrick V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Subsurface Flow and Contaminant Transport Documentation and User's Guide

Description: This report documents a finite element code designed to model subsurface flow and contaminant transport, named FACT. FACT is a transient three-dimensional, finite element code designed to simulate isothermal groundwater flow, moisture movement, and solute transport in variably saturated and fully saturated subsurface porous media. The code is designed specifically to handle complex multi-layer and/or heterogeneous aquifer systems in an efficient manner and accommodates a wide range of boundary … more
Date: July 28, 1999
Creator: Aleman, S. E.
Item Type: Refine your search to only 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

Description: The overall goal of this project is to further develop the single-well, ''push-pull'' test method as a site characterization and feasibility assessment tool for studying the fundamental fate and transport behavior of injected surfactants and their ability to solubilize and mobilize DNAPLs in the subsurface. To address the three objectives, the research plan combines controlled intermediate-scale laboratory experiments in unique physical aquifer models with a parallel series of pilot-scale field… more
Date: June 1, 1999
Creator: Istok, Jonathan D. & Field, Jennifer, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optimal Geological Environments for Carbon Dioxide Disposal in Saline Aquifers in the United States

Description: Recent research and applications have demonstrated technologically feasible methods, defined costs, and modeled processes needed to sequester carbon dioxide (CO{sub 2}) in saline-water-bearing formations (aquifers). One of the simplifying assumptions used in previous modeling efforts is the effect of real stratigraphic complexity on transport and trapping in saline aquifers. In this study we have developed and applied criteria for characterizing saline aquifers for very long-term sequestration … more
Date: February 1, 1999
Creator: Hovorka, Susan D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New Permeameters for in situ Characterization of Unsaturated Heterogeneous Permeability

Description: Thick unsaturated zones underlie many Department of Energy (DOE) landfills, industrial areas, and waste storage sites in the western United States and are the primary pathway for contaminants to migrate into underlying aquifers. The spatial variability of unsaturated hydraulic properties in these heterogeneous geologic materials directly influences the movement of water and non-aqueous phase liquids (NAPL's). Poor characterization of heterogeneity may lead to ineffective remedial designs and in… more
Date: June 1, 1999
Creator: Wilson, John L. & Glass, Robert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Simulations of Groundwater Flow and Radionuclide Transport in the Vadose and Saturated Zones beneath Area G, Los Alamos National Laboratory

Description: Numerical simulations are used to predict the migration of radionuclides from the disposal units at Material Disposal Area G through the vadose zone and into the main aquifer in support of a radiological performance assessment and composite analysis for the site. The calculations are performed with the finite element code, FEHM. The transport of nuclides through the vadose zone is computed using a three-dimensional model that describes the complex mesa top geology of the site. The model incorpo… more
Date: July 1, 1999
Creator: Birdsell, Kay H.; Bower, Kathleen M.; Wolfsberg, Andrew V.; Soll, Wendy E.; Cherry, Terry A. & Orr, Tade W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Enhanced Reductive Dechlorination of TCE in a Basalt Aquifer

Description: A field evaluation of enhanced reductive dechlorination of trichloroethene (TCE) in groundwater has been in progress since November 1998 to determine whether in situ biodegradation can be significantly enhanced through the addition of an electron donor (lactate). An in situ treatment cell was established in the residual source area of a large TCE plume in a fractured basalt aquifer utilizing continuous ground water extraction approximately 150 meters downgradient of the injection location. Afte… more
Date: April 1, 1999
Creator: Sorenson, K. S.; Peterson, L. N. & Ely, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Water-Level Monitoring Plan for the Hanford Groundwater Monitoring Project

Description: This document presents the water-level monitoring plan for the Hanford Groundwater Monitoring Project, conducted by the Pacific Northwest National Laboratory (PNNL). Water-level monitoring of the groundwater system beneath the Hanford Site is performed to fulfill the requirements of various state and federal regulations, orders, and agreements. The primary objective of this monitoring is to determine groundwater flow rates and directions. To meet this and other objectives, water-levels are meas… more
Date: September 30, 1999
Creator: Newcomer, D.R.; McDonald, J.P. & Chamness, M.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physics of DNAPL Migration and Remediation in the Presence of Heterogeneities

Description: The goal of our 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 fundamental… more
Date: November 29, 1999
Creator: CONRAD,STEPHEN H. & GLASS,ROBERT J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of Barometric Fluctuations on Well Water-Level Measurements and Aquifer Test Data

Description: The Pacific Northwest National Laboratory, as part of the Hanford Groundwater Monitoring Project, examines the potential for offsite migration of contamination within underlying aquifer systems. Well water-level elevation measurements from selected wells within these aquifer systems commonly form the basis for delineating groundwater-flow patterns (i.e., flow direction and hydraulic gradient). In addition, the analysis of water-level responses obtained in wells during hydrologic tests provides … more
Date: December 16, 1999
Creator: FA Spane, Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

F-Area Hazardous Waste Management Facility Semiannual Correction Action Report, Vol. I and II

Description: The groundwater in the uppermost aquifer beneath the F-Area Hazardous Waste Management Facility (HWMF) at the Savannah River Site is routinely monitored for selected hazardous and radioactive constituents. This report presents the results of the required groundwater monitoring program.
Date: November 18, 1999
Creator: Chase, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Groundwater Monitoring Plan for the 216-A-29 Ditch

Description: This report describes the groundwater monitoring plan for the 216-A-29 ditch on the Hanford Site. This document presents a groundwater monitoring plan, under Resource Conservation and Recovery Act of 1976 (RCRA) regulatory requirements found in WAC 173-303-400, and by reference, requirements in 40 CFR 265.93 (d)(6) for the 216-A-29 Ditch (A-29 Ditch) in the Hanford Site's 200 East Area. The objectives of this monitoring plan are to determine whether any hazardous constituents are detectable in … more
Date: January 28, 1999
Creator: Sweeney, Mark D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of Barometric Fluctuations on Well Water-Level Measurements and Aquifer Test Data

Description: This report examines the effects of barometric fluctuations on well water-level measurements and evaluates adjustment and removal methods for determining areal aquifer head conditions and aquifer test analysis. Two examples of Hanford Site unconfined aquifer tests are examined that demonstrate baro-metric response analysis and illustrate the predictive/removal capabilities of various methods for well water-level and aquifer total head values. Good predictive/removal characteristics were demonst… more
Date: December 16, 1999
Creator: Spane, Frank A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Anoxic Plume Attenuation in a Fluctuating Water Table System: Impact of 100-D Area In Situ Redox Manipulation on Downgradient Dissolved Oxygen Concentrations

Description: Anoxic Plume Attenuation in a Fluctuating Water Table System: Impact of 100-D Area In Situ Redox Manipulation on Downgradient Dissolved Oxygen Concentrations
Date: June 14, 1999
Creator: Williams, Mark D.; Vermeul, Vincent R.; Oostrom, Martinus; Evans, John C.; Fruchter, Jonathan S.; Istok, J. D. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electrochemical Processes for In-situ Treatment of Contaminated Soils

Description: Soils at typical DOE (Department of Energy) waste sites are known to be contaminated by a host of hazardous organic chemicals, heavy metals and radionuclides. Typical hazardous organic contaminants include chlorinated solvents such as trichloroethylene (TCE), tetrachloroethylene (PCE), chloroform, and carbon tetrachloride, and polycyclic aromatic hydrocarbons (PAHs) such as naphthalene, fluorene, phenanthrene, anthracene and pyrene. It is also known that major toxic heavy metals such as Pb, Cr,… more
Date: June 1, 1999
Creator: Huang, C.P. & Cha, Daniel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Water Influx, and Its Effect on Oil Recovery: Part 1. Aquifer Flow, SUPRI TR-103

Description: Natural water encroachment is commonly seen in many oil and gas reservoirs. In fact, overall, there is more water than oil produced from oil reservoirs worldwide. Thus it is clear that an understanding of reservoir/aquifer interaction can be an important aspect of reservoir management to optimize recovery of hydrocarbons. Although the mathematics of these processes are difficult, they are often amenable to analytical solution and diagnosis. Thus this will be the ultimate goal of a series of rep… more
Date: August 9, 1999
Creator: Brigham, William E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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