Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Life Sciences (15581)
- Physical Sciences and Mathematics (14836)
- Plant Sciences (11390)
- Earth Sciences (10978)
- Soil Science (10241)
-
- Agronomy and Crop Sciences (9665)
- Plant Pathology (9449)
- Agricultural Science (9329)
- Plant Biology (9320)
- Weed Science (9280)
- Social and Behavioral Sciences (8789)
- Medicine and Health Sciences (8643)
- Law (6982)
- Engineering (6350)
- Library and Information Science (4644)
- Law Librarianship (3813)
- Civil and Environmental Engineering (2796)
- Medical Specialties (2709)
- Arts and Humanities (2644)
- Transportation Engineering (2393)
- Public Health (2087)
- Education (1527)
- Courts (1389)
- Environmental Sciences (1363)
- Medical Sciences (1220)
- Pharmacy and Pharmaceutical Sciences (1065)
- Mechanical Engineering (1054)
- Materials Science and Engineering (1003)
- Physics (965)
- Sociology (927)
- Keyword
-
- Law libraries (3778)
- Law librarians (3777)
- SEAALL (3766)
- Kentucky (1832)
- Humans (1060)
-
- Animals (726)
- Female (600)
- Male (579)
- Grazing (417)
- Appalachia (357)
- Engineering (351)
- Kentucky transportation (332)
- Mice (329)
- Gas (272)
- Alfalfa (269)
- University of Kentucky (268)
- United States (259)
- Nitrogen (257)
- And Energy; Structural Materials; Sustainability (251)
- Energy Systems; Environmental Indicators and Impact Assessment; Environmental Monitoring; Mining Engineering; Oil (251)
- Public health (246)
- Adult (239)
- Forage (221)
- Obesity (212)
- Middle Aged (209)
- Cattle (208)
- Adolescent (203)
- Aged (191)
- Education (191)
- Aging (187)
- Publication Year
- Publication
-
- IGC Proceedings (1977-2023) (9262)
- Kentucky Law Journal (4652)
- Correspondence (2468)
- Kentucky Transportation Center Research Report (1822)
- World of Coal Ash Proceedings (1708)
-
- 1970-1979 (981)
- University of Kentucky Doctoral Dissertations (869)
- Law Faculty Scholarly Articles (801)
- Physics and Astronomy Faculty Publications (797)
- Scholarship Committee (661)
- University of Kentucky Master's Theses (658)
- DNP Projects (522)
- Markey Cancer Center Faculty Publications (514)
- Kentucky's Annual Forum on Transportation (504)
- MPA/MPP/MPFM Capstone Projects (487)
- Theses and Dissertations--Public Health (M.P.H. & Dr.P.H.) (487)
- disClosure: A Journal of Social Theory (458)
- Kentucky Alfalfa and Stored Forage Conference (389)
- The Kentucky Review (356)
- Pediatrics Faculty Publications (335)
- Forage News (331)
- Journal of Natural Resources & Environmental Law (330)
- Kaleidoscope (330)
- 1980-1989 (327)
- Library Faculty and Staff Publications (322)
- Journals of the General Assembly of the Commonwealth of Kentucky (310)
- Theses and Dissertations--Psychology (304)
- Kentucky Journal of Equine, Agriculture, & Natural Resources Law (302)
- Theses and Dissertations--Music (302)
- Internal Medicine Faculty Publications (293)
- Publication Type
Articles 6181 - 6210 of 52423
Full-Text Articles in Entire DC Network
Paper_Single-Ended (Blind) Directional Wells For Ash Basin Dewatering, David Bardsley, Dan Ombalski, Brian Shinall, Michael Thornbrue
Paper_Single-Ended (Blind) Directional Wells For Ash Basin Dewatering, David Bardsley, Dan Ombalski, Brian Shinall, Michael Thornbrue
World of Coal Ash Proceedings
SINGLE-ENDED (BLIND) DIRECTIONAL WELLS FOR ASH BASIN DEWATERING Authors Mr. David Bardsley - United States - Ellingson Mr. Dan Ombalski - United States - Ellingson Mr. Brian Shinall - United States - Ellingson Mr. Michael Thornbrue - United States - Atlas Technical Consultants Abstract A power company and their consultant, Atlas Technical Consultants, retained Ellingson-DTD (Ellingson) to install horizontal wells in a partially capped CCR landfill. Ellingson developed and utilized proprietary guidance and well construction technologies to overcome challenges with installing horizontal wells in ash. The technology is based on the ability to navigate casing through a designed curvilinear bore …
High Dimensional Data Analysis And Visualization To Demonstrate Compliance, Alex Eklund
High Dimensional Data Analysis And Visualization To Demonstrate Compliance, Alex Eklund
World of Coal Ash Proceedings
High Dimensional Data Analysis and Visualization to Demonstrate Compliance Authors Ms. Alex Eklund - United States - TRC Abstract Principal Component Analysis (PCA) and Linear Discriminant Analysis (LDA) are powerful statistical techniques that can be used to evaluate high dimensional groundwater data generated throughout coal combustion residual (CCR) monitoring programs. These techniques are particularly useful in assessing unanticipated changes in groundwater quality and distinguishing sources of CCR impacts. These methods offer several benefits in the analysis and interpretation of data through: 1) dimensionality reduction and visualization, reducing the dimensionality of the dataset to more easily visualize and make correlations in …
Unique, Sustainable, Scalable And Economically Beneficial - Site Remediation & Product Solutions, Maroun Rahme
Unique, Sustainable, Scalable And Economically Beneficial - Site Remediation & Product Solutions, Maroun Rahme
World of Coal Ash Proceedings
Total Ash and Brine Water Waste Utilisation Authors Mr. Maroun Rahme - Australia - Nu-Rock Technology Abstract Nu-Rock’s world-leading and non-cementitious technology's first Ash plant is on Mt. Piper Power Station in Portland NSW converts all ash and brine water generated by a coal fired power station into ‘engineered rock’, which can be used to manufacture superior performing green products such as Building Product Non-cementitious masonry manufacturing means the complete absence of cement in Nu-Rock products. This is a win for the environment and for the building, construction and mining industries. Laboratory tests verify that Nu-Rock’s patented process chemically locks …
Epa’S Updated Toxicity Criteria For Arsenic-Implications On Coal Ash Sites, Todd Bernhardt, Jay Peters
Epa’S Updated Toxicity Criteria For Arsenic-Implications On Coal Ash Sites, Todd Bernhardt, Jay Peters
World of Coal Ash Proceedings
EPA’s Updated Toxicity Criteria for Arsenic: Implications on Coal Ash Sites Authors Mr. Todd Bernhardt - United States - Haley & Aldrich Inc. Mr. Jay Peters - United States - Haley & Aldrich Inc. Abstract In October 2023, the United States Environmental Protection Agency (EPA) released a draft Integrated Risk Information System (IRIS) Toxicological Review of Inorganic Arsenic in which updated toxicity criteria were proposed that are significantly more conservative than the current values. Adoption of the proposed toxicity criteria could have significant implications on risk-based levels for arsenic. Although the Coal Combustion Residuals (CCR) Rule relies on EPA Maximum …
Paper_From Farm To Ash- Deploying An Existing Economical Boron Solution To Ccr Groundwater, Ben Amos, Hariprasad Parthasarathy, Paul Wegner, Peter Schratz
Paper_From Farm To Ash- Deploying An Existing Economical Boron Solution To Ccr Groundwater, Ben Amos, Hariprasad Parthasarathy, Paul Wegner, Peter Schratz
World of Coal Ash Proceedings
From Farm to Ash: Deploying an Existing Economical Boron Solution to CCR Groundwater Authors Dr. Ben Amos - United States - Geosyntec Consultants, Inc. Dr. Hariprasad Parthasarathy - United States - Geosyntec Consultants, Inc. Mr. Paul Wegner - United States - Calcon Mr. Peter Schratz - United States - Calcon Abstract Boron is detected frequently at relatively high concentrations at CCR sites. Boron is currently regulated at CCR sites in several states, with the potential for regulation by USEPA at levels that would trigger corrective action. Due to its (geo)chemical properties, boron is not readily amenable to natural attenuation or …
Paper_Using Interim Storage To Better Align Harvesting And Beneficiation Timelines, Ethan Bond
Paper_Using Interim Storage To Better Align Harvesting And Beneficiation Timelines, Ethan Bond
World of Coal Ash Proceedings
With environmental sustainability increasing in priority, a number of beneficiation technologies have entered the market since the Coal Combustion Residuals (CCR) Rule took effect. While beneficiation providers offer an attractive solution to the previously regulated and newly regulated units facing closure, the timelines associated with beneficiation are often less attractive considering the strict regulatory deadlines imposed by the CCR Rule. Incorporating environmentally safe interim storage with traditional harvesting and beneficiation offers a potential solution to maintaining regulatory compliance while allowing for sustainable reuse of CCR. In this presentation we’ll explore considerations when looking at interim storage options, outline the various …
Using Interim Storage To Better Align Harvesting And Beneficiation Timelines, Ethan Bond
Using Interim Storage To Better Align Harvesting And Beneficiation Timelines, Ethan Bond
World of Coal Ash Proceedings
Using Interim Storage to Better Align Harvesting and Beneficiation Timelines Authors Mr. Ethan Bond - United States - WM Abstract With sustainability increasing in priority, a number of beneficiation technologies have entered the market since the Coal Combustion Residuals (CCR) Rule took effect. While beneficiation providers offer an attractive solution to the currently regulated and soon to be regulated units facing closure, the timelines associated with beneficiation are often less attractive considering the strict regulatory deadlines imposed by the CCR Rule. Incorporating environmentally safe interim storage with traditional harvesting and beneficiation offers a potential solution to maintaining regulatory compliance while …
The Domino Effect Of A Pandemic- Data Quality Impact To A Full Cycle Qa Program, Amanda Cover, Rock Vitale, Jennifer Gable, Veronica Barredo
The Domino Effect Of A Pandemic- Data Quality Impact To A Full Cycle Qa Program, Amanda Cover, Rock Vitale, Jennifer Gable, Veronica Barredo
World of Coal Ash Proceedings
Data Quality Assessment of a Long Running QA Program – The Domino Effect of a Pandemic Authors Ms. Amanda Cover - United States - Environmental Standards Mr. Rock Vitale - United States - Environmental Standards Ms. Jennifer Gable - United States - Environmental Standards Ms. Veronica Barredo - United States - TVA Abstract Keywords: Quality Assurance, Data Quality It should be no secret that a full-cycle quality assurance (QA) program for Groundwater Monitoring Programs establishes a “well-oiled machine” that results in high quality, legally defensible data sets that can be reliably used to make critical decisions. Under normal conditions, a …
Exploring Non-Invasive High-Resolution Geophysical Site Characterization Methods For Delineation Of Coal Ash, Colin Plank, Mike Shultz, James Feild
Exploring Non-Invasive High-Resolution Geophysical Site Characterization Methods For Delineation Of Coal Ash, Colin Plank, Mike Shultz, James Feild
World of Coal Ash Proceedings
Exploring Non-invasive High-Resolution Geophysical Site Characterization Methods for Delineation of Coal Ash Authors Mr. Colin Plank - United States - Burns &McDonnell Dr. Mike Shultz - United States - Burns & McDonnell Dr. James Feild - United States - Burns & McDonnell Abstract “Legacy Rule” revisions to Combustible Coal Residuals (CCR) regulations for inactive electric utility surface impoundments and CCR management units combined with aggressive compliance timeframes make efficient site delineation and characterization critical for program managers to achieve and sustain compliance. Advances in high-resolution geophysical approaches allow for non-invasive delineation in three-dimensions which can significantly reduce investigation costs and …
Coal Ash Landfill Leachate Systems – Design And Treatment, Christine Harris, Rob Orlando
Coal Ash Landfill Leachate Systems – Design And Treatment, Christine Harris, Rob Orlando
World of Coal Ash Proceedings
Coal Ash Landfill Leachate Systems – Design and Treatment Authors Mrs. Christine Harris - United States - Groundwater Treatment and Technology, LLC (GWTT) Mr. Rob Orlando - United States - Groundwater Treatment and Technology, LLC (GWTT) Abstract Leachate from a coal ash landfill is a highly variable solution which could contain a myriad of constituents as well as varying pH values. The proposed Effluent Limits Guideline limit the discharge of coal ash leachate. This presentation will provide an overview of the design and treatment methods that can be employed to manage this leachate. The first part of the presentation will …
Harvesting And Beneficial Use- Voluntary, Consensus Standard Developed By Astm E50.03, Benjamin Gallagher, Abigail Calmes, William Petruzzi
Harvesting And Beneficial Use- Voluntary, Consensus Standard Developed By Astm E50.03, Benjamin Gallagher, Abigail Calmes, William Petruzzi
World of Coal Ash Proceedings
Harvesting and Beneficial Use: Voluntary, Consensus Standard Developed by ASTM E50.03 Authors Mr. Benjamin Gallagher - United States - EPRI Ms. Abigail Calmes - United States - Verdantas Mr. William Petruzzi - United States - Verdantas Abstract ASTM is non-profit organization that develops voluntary, consensus-based standards. ASTM E50.03 subcommittee publishes standards related to beneficial use. The subcommittee’s eight active standards address harvesting of CCPs from landfills and impoundments, beneficial use of CCPs in mine reclamation and structural fills, and beneficial use of impacted lands. This session will provide an overview of active beneficial use standards. The recently published ASTM E3355-23 …
Leveraging Data To Build An Effective Quality Assurance Program, Deanna Aungst, Danielle Coles
Leveraging Data To Build An Effective Quality Assurance Program, Deanna Aungst, Danielle Coles
World of Coal Ash Proceedings
Leveraging Data to Build an Effective Quality Assurance Program Authors Ms. DEANNA AUNGST - United States - Environmental Standards Ms. Danielle Coles - United States - Environmental Standards Abstract Beyond the standard field measurements and analytical results typically stored in a database or spreadsheet, capturing the data around the delivery, quality, timeliness, and status of that data can enable managers to understand the successes or stumbling points of their programs. Tracking the metadata of each deliverable, as well as each task associated with them, provides a non-biased assessment of how your program is working. Having this information available also allows …
Subtle Geochemical Adjustments In Native Aquifer Soils – In Situ Groundwater Treatment Strategies For Cobalt At Coal Combustion Residual Sites, David Collins, Jim Finley
Subtle Geochemical Adjustments In Native Aquifer Soils – In Situ Groundwater Treatment Strategies For Cobalt At Coal Combustion Residual Sites, David Collins, Jim Finley
World of Coal Ash Proceedings
Subtle Geochemical Adjustments in Native Aquifer Soils – In Situ Groundwater Treatment Strategies for Cobalt at Coal Combustion Residual Sites Authors Mr. David Collins - United States - Stantec Mr. Jim Finley - United States - Stantec Abstract Cobalt is frequently observed above the groundwater protection standard (GWPS) downgradient of CCR units. Native aquifer soils have the capacity to influence groundwater geochemistry and play an important role in attenuation of cobalt and other CCR constituents. Geochemical modeling confirmed by bench-scale treatability testing has shown cobalt responds favorably to enhanced attenuation by relatively minor in situ adjustments of geochemical conditions in …
Survey Techniques Used To Monitor Closed Ccr Storage Facilities, Max Cange, Rachel Combs, Steve Shamblin, Jamey Dotson
Survey Techniques Used To Monitor Closed Ccr Storage Facilities, Max Cange, Rachel Combs, Steve Shamblin, Jamey Dotson
World of Coal Ash Proceedings
Survey Techniques Used to Monitor Closed CCR Storage Facilities Authors Mr. Max Cange - United States - Geosyntec Consultants, Inc. Mrs. Rachel Combs - United States - TVA Mr. Steve Shamblin - United States - TVA Mr. Jamey Dotson - United States - Geosyntec Consultants, Inc. Abstract Survey techniques can be used to supplement and enhance the effectiveness of more conventional monitoring practices (i.e., visual inspections and instrumentation) for closed CCR storage facilities. The performance of annual surveys of CCR facilities following closure can be used to monitor the integrity and effectiveness of the final cover system and satisfy relevant …
Geochemical Assessment To Support Evaluation Of Remedy Options At Ccr Units, Jim Finley, Paul Thomas, John Griggs
Geochemical Assessment To Support Evaluation Of Remedy Options At Ccr Units, Jim Finley, Paul Thomas, John Griggs
World of Coal Ash Proceedings
Developing closure and groundwater remedy strategies for CCR facilities requires broad investigation into material properties, hydrology, surface and groundwater quality, human and ecological risk among others. The inorganic constituents commonly associated with CCR materials are also chemically reactive with minerals contained in underlying unconsolidated materials. Essential information about the geochemical properties of unconsolidated material includes identification of reactive mineralogy, the distribution of Appendix IV constituents among mineral fractions through selective extraction, and quantification of the cation exchange capacity of clays. Results of geochemical assessment are incorporated in geochemical models used to predict response of the groundwater system to various remedies. …
Coal Clinker Ash Transforming Influence On Carbon Content Of Sandy Soil, Agnes Dube, Mutsa Muhambi, Mitsuru Tsubo, Tsugiyuki Masunaga
Coal Clinker Ash Transforming Influence On Carbon Content Of Sandy Soil, Agnes Dube, Mutsa Muhambi, Mitsuru Tsubo, Tsugiyuki Masunaga
World of Coal Ash Proceedings
Coal Clinker Ash Transforming Influence on Carbon Content of Sandy Soil Authors Ms. Agnes Dube - Japan - The United Graduate School of Agricultural Sciences Mr. Mutsa Muhambi - Japan - The United Graduate School of Agricultural Sciences Dr. Mitsuru Tsubo - Japan - Tottori University Dr. Tsugiyuki Masunaga - Japan - Shimane University Dr. Eiji Nishihara - Japan - Tottori University Abstract Soil carbon (C) is increasingly becoming an important factor in assessing soil quality and improving soil CO2sink capabilities. The application of carbonaceous coal clinker ash (CA) was postulated to improve the C content of sandy soils. A …
Conventional Or Bentonite-Polymer Gcls For Coal Combustion Product Leachates, Yu Tan, Craig Benson, Jimmy Youngblood
Conventional Or Bentonite-Polymer Gcls For Coal Combustion Product Leachates, Yu Tan, Craig Benson, Jimmy Youngblood
World of Coal Ash Proceedings
Conventional or Bentonite-Polymer GCLs for Coal Combustion Product Leachates? Authors Mr. Yu Tan - United States - University of Wisconsin-Madison Dr. Craig Benson - United States - University of Wisconsin-Madison Mr. Jimmy Youngblood - United States - Solmax Inc. Abstract Hydraulic conductivity of geosynthetic clay liners (GCLs) containing sodium bentonite (NaB) or bentonite-polymer composite (BPC) was evaluated using seven coal combustion product (CCP) leachates having various ionic strength (0.0042 to 2.2 M, dilute to concentrated). Four GCLs were evaluated, including two NaB GCLs containing bentonite with different granule sizes and two BPC GCLs containing dry mixtures of bentonite and polymer …
Paper_Long-Term Conductivity Studies Of Low Permeability Concrete Containing Fly Ash, Neal Berke, Ali Inceefe, Kyle Stanish
Paper_Long-Term Conductivity Studies Of Low Permeability Concrete Containing Fly Ash, Neal Berke, Ali Inceefe, Kyle Stanish
World of Coal Ash Proceedings
Durability design and service life modeling are increasingly used to demonstrate that concrete structures have a long service life, resisting corrosion. Fly ash is an important mixture component used in the concrete mixture to reduce the permeability of the concrete with time. In service life modeling, there are two ways that the inclusion of fly ash can increase the predicted life – the rate of permeability reduction with time, and the length of time that permeability decreases. The results of a long-term study of concrete conductivity (which is related to permeability) of various low-permeability concrete mixtures designed for use in …
Subsurface Hydraulic Studies And Modeling To Support Injection Treatment And Hydraulic Containment At Impacted Coal Combustion Product (Ccp) Sites, Ali Meyal, Jim Redwine, Alexander Macbeth, Mike Gefell
Subsurface Hydraulic Studies And Modeling To Support Injection Treatment And Hydraulic Containment At Impacted Coal Combustion Product (Ccp) Sites, Ali Meyal, Jim Redwine, Alexander Macbeth, Mike Gefell
World of Coal Ash Proceedings
Subsurface Hydraulic Studies and Modeling to Support Injection Treatment and Hydraulic Containment at Impacted Coal Combustion Product (CCP) Sites Authors Dr. Ali Meyal - United States - Anchor QEA Dr. Jim Redwine - United States - Anchor QEA Mr. Alexander Macbeth - United States - Anchor QEA Mr. Mike Gefell - United States - Anchor QEA Mr. Chuck Pippin - United States - Anchor QEA Abstract In situ injection for remediation of CCP constituents in groundwater could save millions of dollars at CCP sites compared to conventional technologies. Hydraulic containment is also a selected remedy at many CCP sites. Anchor …
Design, Cqa, And Legacy Rule Considerations For A Multi-Phased Ccp Unit Closure, Brendan Purcell, Brittany Bradley, Jason Obermeyer
Design, Cqa, And Legacy Rule Considerations For A Multi-Phased Ccp Unit Closure, Brendan Purcell, Brittany Bradley, Jason Obermeyer
World of Coal Ash Proceedings
Design, CQA, and Legacy Rule Considerations for a Multi-phased CCP Unit Closure Authors Mr. Brendan Purcell - United States - WSP USA, Inc. Ms. Brittany Bradley - United States - WSP USA, Inc. Mr. Jason Obermeyer - United States - WSP USA, Inc. Abstract This paper presents the case history of an interesting closure certification project at a coal combustion product (CCP) landfill that was progressively closed over a period of more than 30 years as CCPs reached final grades. While progressive closure is recognized as a good management practice, the evolution of an increasingly stringent web of state and …
Long-Term Conductivity Studies Of Low Permeability Concrete Containing Fly Ash, Kyle Stanish, Neal Berke, Ali Inceefe
Long-Term Conductivity Studies Of Low Permeability Concrete Containing Fly Ash, Kyle Stanish, Neal Berke, Ali Inceefe
World of Coal Ash Proceedings
Long-Term Conductivity Studies of Low Permeability Concrete containing Fly Ash Authors Dr. Kyle Stanish - United States - Tourney Consulting Group Dr. Neal Berke - United States - Tourney Consulting Group Mr. Ali Inceefe - United States - Tourney Consulting Group Abstract Durability design and service life modeling are increasingly being used to demonstrate that concrete structures have a long service life, resisting corrosion. Fly ash is an important mixture component that is used in the concrete mixture to reduce the permeability of the concrete with time. In service life modeling, there are two ways that the inclusion of fly …
Navigating Through Geochemical Modeling Uncertainties Related To Site Management And Cleanup Decisions, Scott Hensel
Navigating Through Geochemical Modeling Uncertainties Related To Site Management And Cleanup Decisions, Scott Hensel
World of Coal Ash Proceedings
Navigating through Geochemical Modeling Uncertainties Related to Site Management and Cleanup Decisions Authors Mr. Scott Hensel - United States - Haley & Aldrich Inc. Abstract Geochemical modeling is a common and often essential approach used to understand the fate and transport of many inorganic constituents found at CCR sites. Uncertainties associated with key geochemical parameters may considerably influence the prediction of the fate of a CCR constituent. Because of regulation requirements, many CCR sites are in the process of selecting final remedies, which are often based on geochemical modeling results. Typically, thermodynamic databases downloaded with the program are used to …
Comparative Analysis Of Predicted Vs. Observed Leachate Generation Rates In Three Coal Combustion Residual Landfills, John Trast, Andrew Schwoerer, Eric Kovatch
Comparative Analysis Of Predicted Vs. Observed Leachate Generation Rates In Three Coal Combustion Residual Landfills, John Trast, Andrew Schwoerer, Eric Kovatch
World of Coal Ash Proceedings
Comparative Analysis of Predicted vs. Observed Leachate Generation Rates in Three Coal Combustion Residual Landfills Authors Mr. John Trast - United States - GEI Consultants, Inc. Mr. Andrew Schwoerer - United States - GEI Consultants, Inc. Mr. Eric Kovatch - United States - WEC Energy Group Abstract This paper evaluates and compares the predicted leachate generation rates with the observed rates in three coal combustion residual (CCR) landfills. The study focuses on assessing the accuracy of predictive models and understanding the factors influencing the variation between predicted and observed leachate generation in Landfill A, Landfill B, and Landfill C. The …
Ionic Liquid-Based Extraction And Separation For Recovery Of Rare-Earth Elements From Coal Fly Ash, Ting Liu, Ching-Hua Huang
Ionic Liquid-Based Extraction And Separation For Recovery Of Rare-Earth Elements From Coal Fly Ash, Ting Liu, Ching-Hua Huang
World of Coal Ash Proceedings
Ionic liquid-based extraction and separation for recovery of rare-earth elements from coal fly ash Authors Ms. Ting Liu - United States - Georgia Institute of Technolog Prof. Ching-Hua Huang - United States - Georgia Institute of Technology Abstract Rare-earth elements (REEs) play a critical role in modern technologies. The United States currently lacks domestic REE supply but has a substantial reserve of coal fly ash (CFA) from annual production and decades of accumulation. CFAs are valuable sources for REE recovery, encompassing a comprehensive REE range with some at higher concentrations than rare earth mines. Recent studies from our research group …
Paper_Design, Cqa, And Legacy Rule Considerations For A Multi-Phased Ccp Unit Closure, Brendan Purcell, Brittany Bradley, Jason Obermeyer
Paper_Design, Cqa, And Legacy Rule Considerations For A Multi-Phased Ccp Unit Closure, Brendan Purcell, Brittany Bradley, Jason Obermeyer
World of Coal Ash Proceedings
This paper presents the case history of an interesting closure certification project at a coal combustion product (CCP) landfill that was progressively closed over a period of more than 30 years as CCPs reached final grades. While progressive closure is recognized as a good management practice, the evolution of an increasingly stringent web of state and federal regulations and construction quality assurance (CQA) requirements over the intervening 30 years necessitated retroactive demonstrations to verify compliance with present-day closure requirements. Additionally, earlier-than anticipated plant retirement meant that open areas of the landfill had not yet reached design grades, leaving low areas …
Chimney Drain Construction Lessons Learned, Jason Thaxton
Chimney Drain Construction Lessons Learned, Jason Thaxton
World of Coal Ash Proceedings
WM offers a unique perspective after building and operating several Coal Combustion Residual (CCR) landfills for clients as well as operating CCR monofills at several WM landfills. One feature that has been consistently incorporated into landfill design for our clients is chimney drains. While intended to collect water from exposed CCR surfaces and channel it to the leachate management system, their use requires precise installation and CCR placement to ensure functionality. In working with chimney drains during the construction and closure phases, WM has identified best practices in managing the effectiveness of chimney drains. In sharing our experience for managing …
Manage Unexpected Remediation Outcomes In Fractured Bedrock Geological Settings, Rong Yu
Manage Unexpected Remediation Outcomes In Fractured Bedrock Geological Settings, Rong Yu
World of Coal Ash Proceedings
Managing Unexpected Outcomes from Remediation in Fractured Bedrock Geological Settings – How a Revision in the Conceptual Site Model Helped Resolve Unforeseen Conditions Authors Dr. Rong Yu - United States - SynTerra Corporation Abstract To meet groundwater compliance goals established by federal and state regulatory agencies, active groundwater remediation, in addition to source control and monitored natural attention, is often needed. Groundwater extraction is a common hydraulic control measure to achieve plume containment and mass removal. However, in places with complicated geological settings such as fractured bedrock, the hydraulic stress introduced by pumping groundwater can lead to unexpected mobilization of …
Beneficial Reuse Of Fly Ash Harvested From Historic Onsite Sources, Todd Stong, Craig Schuettpelz, Ryan Frank, Shane Stockdill
Beneficial Reuse Of Fly Ash Harvested From Historic Onsite Sources, Todd Stong, Craig Schuettpelz, Ryan Frank, Shane Stockdill
World of Coal Ash Proceedings
Beneficial Reuse of Fly Ash Harvested from Historic Onsite Sources Authors Mr. Todd Stong - United States - WSP USA Mr. Craig Schuettpelz - United States - WSP USA Mr. Ryan Frank - United States - Rainbow Energy Center Mr. Shane Stockdill - United States - Rainbow Energy Center Abstract At many power generation sites, fly ash and other coal combustion residuals (CCRs) have been deposited in previously mined areas, potential “CCR management units” (CCRMUs), or CCR landfills and surface impoundments. The physical properties of these materials may allow them to be beneficially used in applications that meet both regulatory …
Dewatering Pilot Tests For Geotechnical Investigation, Paul Schmall
Dewatering Pilot Tests For Geotechnical Investigation, Paul Schmall
World of Coal Ash Proceedings
Dewatering Pilot Tests for Geotechnical Investigation Authors Dr. Paul Schmall - United States - Keller Abstract Pore water dewatering using wells, wellpoints, and other devices has become a standard tool for facilitating pond closure, both for improving stability and safety on previously saturated CCR surfaces, and for improving excavatability and general workability of CCR material. However, most pond geotechnical investigations are not designed to produce the parameters required to properly design a pore water dewatering system. Parameters such as well pumping yields, the CCR’s hydraulic conductivity, storativity, and the influence of native groundwater or surface water bodies must all be …
Paper_Chimney Drain Construction Lessons Learned, Jason Thaxton
Paper_Chimney Drain Construction Lessons Learned, Jason Thaxton
World of Coal Ash Proceedings
Chimney Drain Construction Lessons Learned Authors Mr. Jason Thaxton - United States - WM Abstract WM offers a unique perspective after building and operating several Coal Combustion Residual (CCR) landfills for clients as well as operating CCR monofills at several WM landfills. One feature that has been consistently incorporated into landfill design for our clients is chimney drains. While intended to collect water from exposed CCR surfaces and channel it to the leachate management system, their use requires precise installation and CCR placement to ensure functionality. In working with chimney drains during the construction and closure phases, WM has identified …