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100-D Area In Situ Redox Treatability Test for Chromate-Contaminated Groundwater
A treatability test was conducted for the In Situ Redox Manipulation (ISRM) technology at the 100 D Area of the U. S. Department of Energy's Hanford Site. The target contaminant was dissolved chromate in groundwater. The ISRM technology creates a permeable subsurface treatment zone to reduce mobile chromate in groundwater to an insoluble form. The ISRM permeable treatment zone is created by reducing ferric iron to ferrous iron within the aquifer sediments, which is accomplished by injecting aqueous sodium dithionite into the aquifer and then withdrawing the reaction products. The goal of the treatability test was to create a linear ISRM barrier by injecting sodium dithionite into five wells. Well installation and site characterization activities began in spring 1997; the first dithionite injection took place in September 1997. The results of this first injection were monitored through the spring of 1998. The remaining four dithionite injections were carried out in May through July of 1998.These five injections created a reduced zone in the Hanford unconfined aquifer approximately 150 feet in length (perpendicular to groundwater flow) and 50 feet wide. The reduced zone extended over the thickness of the unconfined zone. Analysis of post-emplacement groundwater samples showed concentrations of chromate, in …
Date:
October 12, 2000
Creator:
Williams, Mark D.; Vermeul, Vincent R.; Szecsody, James E. & Fruchter, Jonathan S.
Object Type:
Report
System:
The UNT Digital Library
100-D Area In Situ Redox Treatability Test for Chromate-Contaminated Groundwater
None
Date:
October 12, 2000
Creator:
Williams, M. D.; Vermeul, V. R.; Szecsody, J. E. & Fruchter, J. S.
Object Type:
Report
System:
The UNT Digital Library
3Q/4Q99 F-Area Hazardous Waste Management Facility Corrective Action Report - Third and Fourth Quarter 1999, Volumes I and II
Savannah River Site (SRS) monitors groundwater quality at the F-Area Hazardous Waste management Facility (HWMF) and provides results of this monitoring to the South Carolina Department of Health and Environmental Control (SCDHEC) semiannually as required by the Resource Conservation and Recovery Act (RCRA) permit. SRS also performs monthly sampling of the Wastewater Treatment Unit (WTU) effluent in accordance with Section C of the Underground Injection Control (UIC) application.
Date:
May 12, 2000
Creator:
Chase, J.
Object Type:
Report
System:
The UNT Digital Library
Access Grid: Immersive Group-to-Group Collaborative Visualization
Immersive projection displays have played an important role in enabling large-format virtual reality systems such as the CAVE and CAVE like devices and the various immersive desks and desktop-like displays. However, these devices have played a minor role so far in advancing the sense of immersion for conferencing systems. The Access Grid project led by Argonne is exploring the use of large-scale projection based systems as the basis for building room oriented collaboration and semi-immersive visualization systems. The authors believe these multi-projector systems will become common infrastructure in the future, largely based on their value for enabling group-to-group collaboration in an environment that can also support large-format projector based visualization. Creating a strong sense of immersion is an important goal for future collaboration technologies. Immersion in conferencing applications implies that the users can rely on natural sight and audio cues to facilitate interactions with participants at remote sites. The Access Grid is a low cost environment aimed primarily at supporting conferencing applications, but it also enables semi-immersive visualization and in particular, remote visualization. In this paper, they describe the current state of the Access Grid project and how it relates and compares to other environments. They also discuss augmentations to …
Date:
July 12, 2000
Creator:
Childers, Lisa; Disz, Terry; Olson, Robert; Papka, Michael E.; Stevens, Rick & Udeshi, Tushar
Object Type:
Article
System:
The UNT Digital Library
An Adaptive Path Planning Algorithm for Cooperating Unmanned Air Vehicles
An adaptive path planning algorithm is presented for cooperating Unmanned Air Vehicles (UAVs) that are used to deploy and operate land-based sensor networks. The algorithm employs a global cost function to generate paths for the UAVs, and adapts the paths to exceptions that might occur. Examples are provided of the paths and adaptation.
Date:
September 12, 2000
Creator:
Cunningham, C.T. & Roberts, R.S.
Object Type:
Article
System:
The UNT Digital Library
Addendum to the Corrective Action Decision Document for Corrective Action Unit 254: Area 25 R-MAD Decontamination Facility, Nevada Test Site, Nevada (Rev. 0, December 2000)
This document is an addendum to the Corrective Action Decision Document (CADD) that has been prepared for Corrective Action Unit (CAU) 254, Area 25 Reactor Maintenance, Assembly, and Disassembly (R-MAD) Decontamination Facility. CAU 254 consists of Corrective Action Site (CAS) 25-23-06, Decontamination Facility. The purpose of this addendum is to provide a rationale for the recommendation of a revised preferred alternative corrective action for CAU 254. This preferred alternative corrective action, Alternative 3, consists of the removal of accessible soil/sediment and all building material above ground level from the CAU 254 Site. This alternative is being recommended because a cost-effective technology is now available to dismantle the contaminated building and ensure complete removal of all CAU 254 CADD-identified contaminants of concern and any associated contamination. This preferred closure method alternative reduces the potential for future exposure pathways. Procedures will be developed, presented in the Corrective Action Plan, and implemented to ensure worker health and safety, protection of human health and the environment, and to meet all unrestricted release requirements in accordance with applicable state and federal regulations.
Date:
December 12, 2000
Creator:
United States. Department of Energy. Nevada Operations Office.
Object Type:
Report
System:
The UNT Digital Library
Additional Combustion and Emission Control Projects, Heavy Truck Engine Program and Performance Measures for the Engines Team
None
Date:
April 12, 2000
Creator:
Singh, Gurpreet
Object Type:
Article
System:
The UNT Digital Library
Advanced Reactors Transition Program Resource Loaded Schedule
The Advanced Reactors Transition (ART) Resource Loaded Schedule (RLS) provides a cost and schedule baseline for managing the project elements within the ART Program. The Fast Flux Test Facility (FETF) activities are delineated through the end of FY 2000, assuming continued standby. The Nuclear Energy (NE) Legacies and Plutonium Recycle Test Reactor (PRTR) activities are delineated through the end of the deactivation process. This revision reflects the 19 Oct 1999 baseline.
Date:
January 12, 2000
Creator:
Gantt, D. A.
Object Type:
Report
System:
The UNT Digital Library
African Development Bank and Fund
The African Development Bank Group, including the Bank itself (AfDB) and its "soft-loan" affiliate, the African Development Fund (AfDF), is a development finance institution based in Abidjan, Côte d'Ivoire. The Bank has 53 African members, as well as 24 non-regional members, including the United States. In the mid-1990s, the Bank faced management problems and difficulties arising from non-performing loans, but reforms launched in 1995 by a new Bank president, Omar Kabbaj, brought new pledges of support from the non-regionals. U.S. contributions to the Bank resumed in FY2000. This report will be updated as events warrant.
Date:
May 12, 2000
Creator:
Copson, Raymond W.
Object Type:
Report
System:
The UNT Digital Library
After globalization future security in a technology rich world
Over the course of the year 2000, five one-day workshops were conducted by the Center for Global Security Research at the Lawrence Livermore National Laboratory on threats that might come against the US and its allies in the 2015 to 2020 timeframe due to the global availability of advanced technology. These workshops focused on threats that are enabled by nuclear, missile, and space technology; military technology; information technology; bio technology; and geo systems technology. In December, an Integration Workshop and Senior Review before national leaders and experts were held. The participants and reviewers were invited from the DOE National Laboratories, the DOD Services, OSD, DTRA, and DARPA, the DOS, NASA, Congressional technical staff, the intelligence community, universities and university study centers, think tanks, consultants on national security issues, and private industry. For each workshop the process of analysis involved identification and prioritization of the participants' perceived most severe threat scenarios (worst nightmares), discussion of the technologies which enabled those threats, and ranking of the technologies' threat potentials. We were not concerned in this exercise with defining responses, although our assessment of each threat's severity included consideration of the ease or difficulty with which it might be countered. At the concluding …
Date:
February 12, 2000
Creator:
Gilmartin, T J
Object Type:
Article
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 125, No. 3, Ed. 1 Monday, June 12, 2000
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
June 12, 2000
Creator:
Lucas, Donnie A.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 125, No. 20, Ed. 1 Thursday, October 12, 2000
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
October 12, 2000
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 100, No. 255, Ed. 1 Wednesday, January 12, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 12, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 100, No. 305, Ed. 1 Sunday, March 12, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 12, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 101, No. 25, Ed. 1 Wednesday, April 12, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 12, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 101, No. 51, Ed. 1 Friday, May 12, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 12, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 101, No. 77, Ed. 1 Monday, June 12, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 12, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 101, No. 105, Ed. 1 Wednesday, July 12, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 12, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 101, No. 157, Ed. 1 Tuesday, September 12, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 12, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 101, No. 183, Ed. 1 Thursday, October 12, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 12, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 101, No. 209, Ed. 1 Sunday, November 12, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 12, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 101, No. 235, Ed. 1 Tuesday, December 12, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 12, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, April 12, 2000
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
April 12, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, January 12, 2000
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
January 12, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History