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Post-Remediation Biomonitoring of Pesticides in Marine Waters Near the United Heckathorn Superfund Site, Richmond, California
This report, PNNL-11911 Rev. 1, was published in July 2000 and replaces PNNL-11911, which was published in September 1998. The revision corrects tissue concentration units that were reported as dry weight but were actually wet weight, and updates conclusions based on the correct reporting units. Marine sediment remediation at the United Heckathorn Superfund Site was completed in April 1997. Water and mussel tissues were sampled in January 1998 from four stations near Lauritzen Canal in Richmond, California, for the first post-remediation monitoring of marine areas near the United Heckathorn Site. Dieldrin and DDT were analyzed in water samples, tissue samples from resident mussels, and tissue samples from transplanted mussels deployed for 4 months. Concentrations of dieldrin and total DDT in water and total DDT in tissue were compared to pre-remediation data available from the California State Mussel Watch program (tissues) and the Ecological Risk Assessment for the United Heckathorn Superfund Site (tissues and water). Chlorinated pesticide concentrations in water samples were similar to pre-remediation levels and did not meet remediation goals. Mean dieldrin concentrations in water ranged from 0.65 ng/L to 18.1 ng/L and were higher than the remediation goal (0.14 ng/L) at all stations. Mean total DDT concentrations in …
Date:
September 5, 2000
Creator:
Antrim, LD & Kohn, NP
Object Type:
Report
System:
The UNT Digital Library
Post-Remediation Biomonitoring of Pesticides in Marine Waters Near the United Heckathorn Site, Richmond, California
Marine sediment remediation at the United Heckathorn Superfund Site was completed in April 1997. Water and mussel tissues were sampled in January 1998 from four stations near Lauritzen Canal in Richmond, California, for the first post-remediation monitoring of marine areas near the United Heckathorn Site. Dieldrin and DDT were analyzed in water samples, tissue samples from resident mussels, and tissue samples from transplanted mussels deployed for 4 months. Concentrations of dieldrin and total DDT in water and total DDT in tissue were compared to pre-remediation data available from the California State Mussel Watch program (tissues) and the Ecological Risk Assessment for the United Heckathorn Superfund Site (tissues and water). Biomonitoring results indicated that pesticides were still bioavailable in the water column, and have not been reduced from pre-remediation levels. Annual biomonitoring will continue to assess the effectiveness of remedial actions at the United Heckathorn Site.
Date:
September 5, 2000
Creator:
Antrim, Liam D. & Kohn, Nancy P.
Object Type:
Report
System:
The UNT Digital Library
Allinea DDT as a Parallel Debugging Alternative to Totalview
Totalview, from the Etnus Corporation, is a sophisticated and feature rich software debugger for parallel applications. As Totalview has gained in popularity and market share its pricing model has increased to the point where it is often prohibitively expensive for massively parallel supercomputers. Additionally, many of Totalview's advanced features are not used by members of the scientific computing community. For these reasons, supercomputing centers have begun to search for a basic parallel debugging tool which can be used as an alternative to Totalview. As the cost and complexity of Totalview has increased over the years, scientific computing centers have started searching for a viable parallel debugging alternative. DDT (Distributed Debugging Tool) from Allinea Software is a relatively new parallel debugging tool which aims to provide much of the same functionality as Totalview. This review outlines the basic features and limitations of DDT to determine if it can be a reasonable substitute for Totalview. DDT was tested on the NERSC platforms Bassi, Seaborg, Jacquard and Davinci with Fortran90, C, and C++ codes using MPI and OpenMP for parallelism.
Date:
March 5, 2007
Creator:
Antypas, K.B.
Object Type:
Report
System:
The UNT Digital Library
Optical Properties in Non-equilibrium Phase Transitions
An open question about the dynamical behavior of materials is how phase transition occurs in highly non-equilibrium systems. One important class of study is the excitation of a solid by an ultrafast, intense laser. The preferential heating of electrons by the laser field gives rise to initial states dominated by hot electrons in a cold lattice. Using a femtosecond laser pump-probe approach, we have followed the temporal evolution of the optical properties of such a system. The results show interesting correlation to non-thermal melting and lattice disordering processes. They also reveal a liquid-plasma transition when the lattice energy density reaches a critical value.
Date:
January 5, 2006
Creator:
Ao, T; Ping, Y; Widmann, K; Price, D F; Lee, E; Tam, H et al.
Object Type:
Article
System:
The UNT Digital Library
Individuals with Disabilities Education Act (IDEA): Analysis of Changes Made by P.L. 108-446
This report discusses the Individuals with Disabilities Education Act (IDEA — 20 U.S.C. §1400 et seq.), which is both a grants statute and a civil rights statute. It provides federal funding for the education of children with disabilities and requires, as a condition for the receipt of such funds, the provision of a free appropriate public education (FAPE). The statute also contains detailed due process provisions to ensure the provision of FAPE. Originally enacted in 1975, the act responded to increased awareness of the need to educate children with disabilities, and to judicial decisions requiring that states provide an education for children with disabilities if they provided an education for children without disabilities.
Date:
January 5, 2005
Creator:
Apling, Richard N. & Jones, Nancy Lee
Object Type:
Report
System:
The UNT Digital Library
Developments in Realistic Design for Aperiodic Mo/Si Multilayermirrors
Aperiodic multilayers have been designed for various applications, using numeric algorithms and analytical solutions, for many years with varying levels of success. This work developed a more realistic model for simulating aperiodic Mo/Si multilayers to be used in these algorithms by including the formation of MoSi{sub 2}. Using a genetic computer code we were able to optimize a 45{sup o} multilayer for a large bandpass reflection multilayer that gave good agreement with the model.
Date:
April 5, 2006
Creator:
Aquila, A. L.; Salmassi, F.; Dollar, F.; Liu, Y. & Gullikson, E. M.
Object Type:
Article
System:
The UNT Digital Library
Continuum description of avalanches in granular media.
A continuum theory of partially fluidized granular flows is proposed. The theory is based on a combination of the mass and momentum conservation equations with the order parameter equation which describes the transition between flowing and static components of the granular system. We apply this model to the dynamics of avalanches in chutes. The theory provides a quantitative description of recent observations of granular flows on rough inclined planes (Daerr and Douady 1999): layer bistability, and the transition from triangular avalanches propagating downhill at small inclination angles to balloon-shaped avalanches also propagating uphill for larger angles.
Date:
December 5, 2000
Creator:
Aranson, I. S. & Tsimring, L. S.
Object Type:
Article
System:
The UNT Digital Library
Spatiotemporal dynamics of a shallow fluidized bed.
An experimental and theoretical study of the dynamics of an air-fluidized thin granular layer is presented. Near the threshold of instability, the system exhibits critical behavior with remarkably long transient dynamics. Above the threshold of fluidization the system undergoes a Hopf bifurcation as the layer starts to oscillate at a certain frequency due to a feedback between the layer dilation and the airflow rate. Based on our experimental data, we formulate a the simple dynamical model which describes the transition in a shallow fluidized bed.
Date:
December 5, 2000
Creator:
Aranson, I. S.; Tsimring, L. S. & Clark, D. K.
Object Type:
Article
System:
The UNT Digital Library
The United States and Europe: Current Issues
This report examines the current state of the transatlantic relationship and key issues that may have implications for U.S. interests during the 109th Congress.
Date:
July 5, 2006
Creator:
Archick, Kristin & Morelli, Vince L.
Object Type:
Report
System:
The UNT Digital Library
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a bird watching scene at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a bird watching scene at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Great Salt Plains State Park
Photograph of a scene during the pelican migration season, at the Great Salt Plains State Park.
Date:
October 5, 2000
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History