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in creator/contributor: "Mendoza, Donaldo P."  
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Evaluation of Airflow Patterns in the Transfer Area of the 105 KE Basin

Description: This report is a qualitative study of airflow patterns within a building at the transfer area of the 105 KE Basin on the Hanford Site in Washington State. The purpose of the study was to determine the appropriate location for air monitoring equipment.
Date: March 7, 2003
Creator: Fritz, Brad G.; Khan, Fenton & Mendoza, Donaldo P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Summary of TPH Monitoring Conducted at 100-NR-2 during CY 2008 and 2009

Description: This report covers a variety of environmental monitoring activities that were conducted over an 18 month period to provide characterization of a TPH-diesel contamination plume in the 100-NR-2 OU
Date: August 12, 2009
Creator: Fritz, Brad G.; Mendoza, Donaldo P.; Young, David; Stegen, J. A. & Bunn, Amoret L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Methods for Assessing the Relative Amounts of Groundwater Discharge into the Columbia River and Measurement of Columbia River Gradients at the Hanford Site’s 300 Area

Description: This report summarizes FY08 activities conducted under the Remediation and Closure Sciences Project.
Date: September 30, 2008
Creator: Fritz, Brad G.; Mackley, Rob D.; Arntzen, Evan V.; Mendoza, Donaldo P. & Patton, Gregory W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Assessment of Physical Properties of Transuranic Waste in Hanford Single-Shell Tanks

Description: CH2M HILL Hanford Group, Inc. (CH2M HILL) is in the process of identifying and developing supplemental process technologies to accelerate the tank waste cleanup mission. One technology targets disposal of Hanford transuranic (TRU) process wastes stored in single-shell tanks (SSTs). Ten Hanford SSTs are candidates for designation as contact-handled TRU waste type: the B-200 series tanks (241-B-201, -B-202, -B-203, and -B-204), the T-200 series tanks (241-T-201, -T-202, -T-203, and -T-204), and T… more
Date: March 5, 2003
Creator: Rassat, Scot D.; Mahoney, Lenna A.; Wells, Beric E.; Mendoza, Donaldo P. & Caldwell, Dustin D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Physical and Liquid Chemical Simulant Formulations for Transuranic Waste in Hanford Single-Shell Tanks

Description: CH2M HILL Hanford Group, Inc. (CH2M HILL) is in the process of identifying and developing supplemental process technologies to accelerate the tank waste cleanup mission. A range of technologies is being evaluated to allow disposal of Hanford waste types, including transuranic (TRU) process wastes. Ten Hanford single-shell tanks (SSTs) have been identified whose contents may meet the criteria for designation as TRU waste: the B-200 series (241-B-201, -B-202, -B 203, and B 204), the T-200 series … more
Date: July 30, 2003
Creator: Rassat, Scot D.; Bagaasen, Larry M.; Mahoney, Lenna A.; Russell, Renee L.; Caldwell, Dustin D. & Mendoza, Donaldo P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of the Hyporheic Zone at the 300 Area,Hanford Site

Description: The Remediation Task of the Science and Technology (S&T) Project is intended to provide research to meet several objectives concerning the discharge of groundwater contamination into the river at the 300 Area of the Hanford Site. This report serves to meet the research objectives by developing baseline data for future evaluation of remedial technologies, evaluating the effects changing river stage on near-shore groundwater chemistry, improving estimates of contaminant flux to the river, providi… more
Date: October 1, 2007
Creator: Fritz, Brad G.; Kohn, Nancy P.; Gilmore, Tyler J.; McFarland, Doug; Arntzen, Evan V.; Mackley, Rob D. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hanford 100-D Area Biostimulation Soluble Substrate Field Test: Interim Data Summary for the Substrate Injection and Process Monitoring Phases of the Field Test

Description: Pacific Northwest National Laboratory is conducting a treatability test designed to demonstrate that in situ biostimulation can be applied to help meet cleanup goals in the Hanford Site 100-D Area. The in situ biostimulation technology is intended to provide supplemental treatment upgradient of the In Situ Redox Manipulation (ISRM) barrier by reducing the concentration of the primary oxidizing species in groundwater (i.e., nitrate and dissolved oxygen) and chromate, and thereby increasing the l… more
Date: June 1, 2008
Creator: Truex, Michael J.; Vermeul, Vincent R.; Mackley, Rob D.; Fritz, Brad G.; Mendoza, Donaldo P.; Johnson, Christian D. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Treatability Test Plan for 300 Area Uranium Stabilization through Polyphosphate Injection

Description: The U.S. Department of Energy has initiated a study into possible options for stabilizing uranium at the 300 Area using polyphosphate injection. As part of this effort, PNNL will perform bench- and field-scale treatability testing designed to evaluate the efficacy of using polyphosphate injections to reduced uranium concentrations in the groundwater to meet drinking water standards (30 ug/L) in situ. This technology works by forming phosphate minerals (autunite and apatite) in the aquifer that … more
Date: June 1, 2007
Creator: Vermeul, Vincent R.; Williams, Mark D.; Fritz, Brad G.; Mackley, Rob D.; Mendoza, Donaldo P.; Newcomer, Darrell R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation of the Strontium-90 Contaminant Plume along the Shoreline of the Columbia River at the 100-N Area of the Hanford Site

Description: Efforts are underway to remediate strontium-laden groundwater to the Columbia River at the 100-N Area of the Hanford Site. Past practices of the 100-N reactor liquid waste disposal sites has left strontium-90 sorbed onto sediments which is a continuing source of contaminant discharge to the river. The Remediation Task of the Science and Technology Project assessed the interaction of groundwater and river water at the hyporheic zone. Limited data have been obtained at this interface of contamina… more
Date: October 1, 2007
Creator: Mendoza, Donaldo P.; Patton, Gregory W.; Hartman, Mary J.; Spane, Frank A.; Sweeney, Mark D.; Fritz, Brad G. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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300 Area Uranium Stabilization Through Polyphosphate Injection: Final Report

Description: The objective of the treatability test was to evaluate the efficacy of using polyphosphate injections to treat uranium-contaminated groundwater in situ. A test site consisting of an injection well and 15 monitoring wells was installed in the 300 Area near the process trenches that had previously received uranium-bearing effluents. This report summarizes the work on the polyphosphate injection project, including bench-scale laboratory studies, a field injection test, and the subsequent analysis … more
Date: June 30, 2009
Creator: Vermeul, Vincent R.; Bjornstad, Bruce N.; Fritz, Brad G.; Fruchter, Jonathan S.; Mackley, Rob D.; Newcomer, Darrell R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interim Report: 100-NR-2 Apatite Treatability Test: Low Concentration Calcium Citrate-Phosphate Solution Injection for In Situ Strontium-90 Immobilization

Description: Following an evaluation of potential Sr-90 treatment technologies and their applicability under 100-NR-2 hydrogeologic conditions, U.S. Department of Energy, Fluor Hanford, Inc., Pacific Northwest National Laboratory, and the Washington Department of Ecology agreed that the long-term strategy for groundwater remediation at 100-N Area will include apatite sequestration as the primary treatment, followed by a secondary treatment if necessary (most likely phytoremediation). Since then, the agencie… more
Date: July 11, 2008
Creator: Williams, Mark D.; Fritz, Brad G.; Mendoza, Donaldo P.; Rockhold, Mark L.; Thorne, Paul D.; Xie, YuLong et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dynamics of Crust Dissolution and Gas Release in Tank 241-SY-101

Description: Due primarily to an increase in floating crust thickness, the waste level in Tank 241-SY-101 has grown appreciably and the flammable gas volume stored in the crust has become a potential hazard. To remediate gas retention in the crust and the potential for buoyant displacement gas releases from the nonconvective layer at the bottom of the tank, SY-101 will be diluted to dissolve a large fraction of the solids that allow the waste to retain gas. The plan is to transfer some waste out and back-di… more
Date: January 24, 2000
Creator: Rassat, Scot D.; Stewart, Charles W.; Wells, Beric E.; Kuhn, William L.; Antoniak, Zenen I.; Cuta, Judith M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Results of Performance Evaluation Testing of Electrical Leak-Detection Methods at the Hanford Mock Tank Site--FY 2002-2003

Description: Application of two electrical resistivity methods at the Hanford Site Mock Tank during 2002, indicate the viability of the methods as possible leak-detection tools for SST retrieval operations. Electrical Resistivity Tomography and High-Resolution Resistivity were used over a 109-day period to detect leakage of a waste simulant beneath the tank. The results of the test indicate that both of these two methods, and subset methods may be applicable to SST leak detection.
Date: February 1, 2003
Creator: Barnett, D. Brent; Gee, Glendon W.; Sweeney, Mark D.; Johnson, Michael D.; Medina, Victor F.; Mendoza, Donaldo P. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hanford 100-D Area Biostimulation Treatability Test Results

Description: Pacific Northwest National Laboratory conducted a treatability test designed to demonstrate that in situ biostimulation can be applied to help meet cleanup goals in the Hanford Site 100-D Area. In situ biostimulation has been extensively researched and applied for aquifer remediation over the last 20 years for various contaminants. In situ biostimulation, in the context of this project, is the process of amending an aquifer with a substrate that induces growth and/or activity of indigenous bact… more
Date: September 30, 2009
Creator: Truex, Michael J.; Vermeul, Vincent R.; Fritz, Brad G.; Mackley, Rob D.; Mendoza, Donaldo P.; Elmore, Rebecca P. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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