Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Conference

Discipline
Institution
Keyword
Publication Year
Publication
File Type

Articles 331 - 360 of 13029

Full-Text Articles in Engineering

Interactive Effects Of Tissue Temperature And Hydration State On Tendon Mechanical Properties Using A Chicken Drumstick Model, Makayla Maso, Kiara Maso, Mikayla Hulvey Aug 2026

Interactive Effects Of Tissue Temperature And Hydration State On Tendon Mechanical Properties Using A Chicken Drumstick Model, Makayla Maso, Kiara Maso, Mikayla Hulvey

Discovery Day - Daytona Beach

This study focused on the effects of temperature and hydration on tendon extensibility. Four experimental groups were tested using chicken leg tendons tested ex vivo: cold and dehydrated, cold and hydrated, warm and dehydrated, and warm and hydrated. Each treatment group was pulled with an increasing load and measured. It was hypothesized that the warm and hydrated test group would extend the furthest. This was based on studies citing increased bodily flexibility with increasing body temperature as well as stiffness at lower temperatures. Combining temperature and hydration state allowed for not only individual effects of variables to be tested but …


A Differential Equation Approach To Heat Flow In A Thin Rod, Alexandria Krol, David Cardona, Collin Petrie Aug 2026

A Differential Equation Approach To Heat Flow In A Thin Rod, Alexandria Krol, David Cardona, Collin Petrie

Discovery Day - Daytona Beach

A Differential Equation Approach to Heat Flow in a Thin Rod examines how differential equations can be used to model and understand heat conduction in a fundamental physical system. Heat transfer in solids is a key concept in physics and engineering, particularly in systems where temperature changes over time. A thin rod provides a useful one-dimensional model for studying how heat moves through a material and how temperature varies along the rod as time passes. The primary objective is to develop a mathematical description of this process using differential equations. The analysis begins with physical principles such as conservation of …


Mechanical Vibrations And Damping – Structural Analysis, Kelsey Hunsicker, Sarah Kraus, Sophia Muller Martinelli De Souza Aug 2026

Mechanical Vibrations And Damping – Structural Analysis, Kelsey Hunsicker, Sarah Kraus, Sophia Muller Martinelli De Souza

Discovery Day - Daytona Beach

Mechanical Vibrations are crucial in understanding and structural analysis of engineering systems such as bridges and airplane wings. If not considered, these vibrations can lead to structural fatigue or failure. By using differential equations, structural vibrations will be examined. Researching the different kinds of vibrations and damping will help to find the vibration behavior of the system. For example, a mass-spring damper system will use second-order linear differential equations. The systems model can be shown to be underdamped, overdamped, or critically damped. These will compare the amplitudes and oscillation differences between the systems by using computational code. Analyzing these differences …


Numerical Investigation Of The Nonlinear Simple Pendulum And The Dependence Of Oscillation Period On Initial Angle, Kelly Wold, Aidan Hart, Patrick Gilliam Aug 2026

Numerical Investigation Of The Nonlinear Simple Pendulum And The Dependence Of Oscillation Period On Initial Angle, Kelly Wold, Aidan Hart, Patrick Gilliam

Discovery Day - Daytona Beach

Numerical Investigation of the Nonlinear Simple Pendulum and the Dependence of Oscillation Period on Initial Angle examines how the oscillation period of a simple pendulum varies with initial angular displacement and evaluates the accuracy of numerical methods in capturing this behavior. In classical treatments, the small-angle approximation simplifies the governing differential equation and predicts a constant period independent of amplitude; however, this assumption breaks down for larger angles, where the system exhibits nonlinear dynamics. The objective of this project is to model the full nonlinear equation of motion and quantify how the period depends on initial conditions. To achieve this, …


Engineering Path Trajectories With Gravitational Fields, Eliane Dean, Aidan Hart, Isabel Noot, Nathan Browning, Valeria Villazon Fito Aug 2026

Engineering Path Trajectories With Gravitational Fields, Eliane Dean, Aidan Hart, Isabel Noot, Nathan Browning, Valeria Villazon Fito

Discovery Day - Daytona Beach

This project explores how vector calculus concepts play a role in aerospace engineering though spacecraft trajectory design. In particular, the notion of vector fields is used to model the gravitational force, whose work done is expressed through line integrals. By taking the curl of the gravitational field and showing it is zero, the field is recognised as conservative, implying that the work done by gravity is path independent. This property is conceptually linked to gravitational potential energy and the principle of energy conservation. The results are then applied to spacecraft motion, where engineers use energy-base methods to determine efficient trajectories …


Visualizing The Invisible: Simulating Electromagnetic Field In 3d Space With Matlab, Aashman Gupta, Eliane Dean, Riley Esperanca, Hailey Grabinski, Jacob Summerhays, Ameya Sute Aug 2026

Visualizing The Invisible: Simulating Electromagnetic Field In 3d Space With Matlab, Aashman Gupta, Eliane Dean, Riley Esperanca, Hailey Grabinski, Jacob Summerhays, Ameya Sute

Discovery Day - Daytona Beach

Electromagnetic field behaviours in free space are defined by Maxwell’s Equations, which couple the temporal and spatial variations of electric and magnetic fields through partial derivatives. These derivatives quantify the rate of change of each field’s vector component with respect to position and time in a 3D lattice, forming the basis for numerical field analysis. This research will develop a mathematical and computational framework using multivariable calculus to model, simulate, and visualize electromagnetic wave propagation in free space using MATLAB. Gradient, divergence, and curl operations are implemented to compute local field variations and energy transfer. The resulting data are used …


Simulating Pacemakers And Heartbeat Recovery Through Mathematical Modeling, Thomas Estrada, Jayla Edwards Aug 2026

Simulating Pacemakers And Heartbeat Recovery Through Mathematical Modeling, Thomas Estrada, Jayla Edwards

Discovery Day - Daytona Beach

Title: Simulating Pacemakers and Heartbeat Recovery Through Mathematical Modeling   This study utilizes the Fitzhugh-Nagumo model to simulate cardiac electrical activity and the regulatory role of pacemakers through ordinary differential equations (ODEs). By defining the rate of change for membrane voltage, 𝑑𝑣/dt, and a recovery variable, 𝑑𝑤/dt, the model captures the heart's excitability and resting states. Central to the analysis is the stimulus current parameter, which represents the "kick" provided by a pacemaker to correct flatline conditions or weak heartbeats. Using Euler’s method for numerical integration, the research compares unstable cardiac rhythms against corrected periodic oscillations. Additionally, the project implements vector …


Modelling Quadcopter Thrust And Torque Using Lu-Decomposition, Diya Patil Aug 2026

Modelling Quadcopter Thrust And Torque Using Lu-Decomposition, Diya Patil

Discovery Day - Daytona Beach

3 & 4 motor systems have been in the world of aviation in many different forms as the field grows and evolves. To understand the complexities of an Unmanned Aerial Vehicle (UAV) and its stability, assessing the amount of thrust put into each motor can help generate the torque produced despite factors such as multidirectional movement. While a UAV does this multiple times a second, producing a simplified version of this calculation can aid in simpler models simulating UAV movement. Due to the popularity of the quadcopter drone, a simple algorithm depicting thrust through each spinning motor can aid in …


Bridging The Gap: Cybersecurity And Occupational Safety Frameworks In Ai Data Centers, Athena Leader Aug 2026

Bridging The Gap: Cybersecurity And Occupational Safety Frameworks In Ai Data Centers, Athena Leader

Discovery Day - Daytona Beach

Bridging the Gap: Cybersecurity and Occupational Safety Frameworks in AI Data Centers   As artificial intelligence infrastructure expands, AI data centers represent a critical and underexamined convergence of cybersecurity and occupational safety risk. Existing frameworks such as NIST, OSHA, and ISO standards were largely developed in isolation, leaving significant gaps in how organizations manage risks that are simultaneously digital and physical in nature. This study investigates the gaps and overlaps between cybersecurity and occupational safety frameworks as they apply specifically to AI data center environments. Drawing on a targeted literature review of established regulatory and standards-based frameworks, this research identifies where …


Singulars: Performing The Reverse Turing Test, Halim Madi Jul 2026

Singulars: Performing The Reverse Turing Test, Halim Madi

ELO (un)supervised 2026

Singulars is an ongoing series of performance systems in which I co-create poetry with a language model trained on an anthology of English poetry alongside my own writing. Across three works—carnation.exe, versus.exe, and reinforcement.exe—I stage live reinforcement loops in which my poems and the model’s responses compete for audience votes. The audience functions as an embodied feedback mechanism, shaping the evolution of both the machine and the human poet in real time.

This paper examines what happens when a poet becomes both author and training data. Drawing from creativity research, metacognition, and social cognition, I reflect …


Developing Machine Learning Models For Sorption Of Pharmaceuticals To Soils And Sediments, Eyad Mohammed Al Salem Jun 2026

Developing Machine Learning Models For Sorption Of Pharmaceuticals To Soils And Sediments, Eyad Mohammed Al Salem

Thesis/ Dissertation Defenses

The growing environmental presence of pharmaceutically active compounds (PACs) creates a critical need for rapid, cost-effective methods to predict their movement through soils and sediments. Traditional laboratory batch experiments are time-consuming, and previous predictive models often relied on limited data or ignored complex chemical behavior. The primary objective of this thesis is to develop robust machine learning models for predicting the sorption distribution coefficient of PACs. The study aims to determine whether separating data by ionic state improves predictive accuracy and to identify the key physical and chemical factors governing the sorption of PACs onto soils and sediments. A large …


Innovative Hybrid Eor Formulations: Low Salinity Water Coupled With Nanoparticles And Nanopolymers For Carbonate Reservoirs, Aquib Azhar Hakeem Jun 2026

Innovative Hybrid Eor Formulations: Low Salinity Water Coupled With Nanoparticles And Nanopolymers For Carbonate Reservoirs, Aquib Azhar Hakeem

Thesis/ Dissertation Defenses

The recovery of oil from oil-wet carbonated reservoirs remains a challenge due to the unfavorable wettability characteristics and the poor sweep efficiency during the displacement process. In this work, the nano-assisted polymer flooding with Sav10 polymer and silica (SiO2), single-walled carbon nanotube (SWCNT), and titanium dioxide (TiO2) nanoparticles were investigated to enhance the oil recovery from the carbonate core samples at low-salinity conditions. The rheology analysis showed that a Sav10 concentration of 1000 ppm resulted in the most appropriate viscosity, around 3 cP, to effectively control mobility during flooding. The contact angle measurements of the individual nanoparticle dispersions and hybrid …


Rf-Derived Viscoelastic Modeling For Blood Clot Occlusion Sensing, Abdulrahman Mohammed Aldosari Jun 2026

Rf-Derived Viscoelastic Modeling For Blood Clot Occlusion Sensing, Abdulrahman Mohammed Aldosari

Thesis/ Dissertation Defenses

Early and reliable detection of vascular thrombus remains a critical challenge for portable and non-invasive diagnostic systems. This work presents an RF-based sensing methodology for blood clot occlusion sensing through the extraction of viscoelastic clot characteristics derived from microwave reflection coefficient (S₁₁) measurements. A compact single-port coaxial probe is employed to interrogate the vessel–tissue system over a wide frequency range (1–25 GHz), where the measured RF response is used to derive equivalent viscoelastic and electrical model parameters associated with clot formation and progression. Both lumped-element RLC and distributed transmission-line representations are utilized to establish the relationship between the measured dielectric …


Utilizing Waste Paper Ash As Partial Cement Replacement In Concrete, Karim Hassan Jun 2026

Utilizing Waste Paper Ash As Partial Cement Replacement In Concrete, Karim Hassan

Thesis/ Dissertation Defenses

The concrete industry has a considerable environmental impact. The manufacture of ordinary Portland cement (OPC) emits a large amount of carbon dioxide, while the extensive extraction of virgin natural aggregates further burdens the environment during concrete production. This thesis is concerned with the development of low-carbon concrete through the combined utilization of waste paper ash (WPA), recycled aggregates, and accelerated carbonation curing. The main objective is to reduce the environmental footprint of concrete products, including masonry units, by enhancing their carbon sequestration potential, decreasing the use of cement, and alleviating reliance on virgin aggregates, while also maintaining adequate mechanical and …


Quantifying The Impacts Of The Covid-19 Pandemic And Water Tariff Reforms On Domestic Water Consumption In The Emirate Of Abu-Dhabi, Darin Ibrahim Khedr Jun 2026

Quantifying The Impacts Of The Covid-19 Pandemic And Water Tariff Reforms On Domestic Water Consumption In The Emirate Of Abu-Dhabi, Darin Ibrahim Khedr

Thesis/ Dissertation Defenses

The study of domestic water consumption is of critical importance, particularly in hot and arid regions where limited natural water resources and growing demand place increasing pressure on water supply systems. The Emirate of Abu Dhabi, represents an important case study, as domestic water demand is a major concern for policymakers and water resource managers. The emirate experiences an extremely arid climate and depends heavily on desalination to satisfy water requirements across all sectors. The primary objective of this study is to investigate the impacts of the COVID-19 pandemic on domestic water consumption in the Emirate of Abu Dhabi and …


Numerical Assessment On The Use Of Structured Coral Reefs To Mitigate Tsunamis, Rim Ahmed Alsheikh Ali Jun 2026

Numerical Assessment On The Use Of Structured Coral Reefs To Mitigate Tsunamis, Rim Ahmed Alsheikh Ali

Thesis/ Dissertation Defenses

This thesis investigates the role of coral reefs as nature-based tsunami protection systems for coastlines in the United Arab Emirates (UAE). The study is significant because the UAE is located near the seismically active Makran Subduction Zone in the Arabian Sea, which may generate tsunami hazards. The research provides a quantitative assessment of how coral reef morphology, particularly reef width and depth, influences tsunami wave attenuation, flow velocity, flow depth, roughness, and bed shear stress.

The study used a multi-phase methodology combining literature review, laboratory experiments, and numerical modelling. Flume experiments were conducted at UAEU using high-fidelity 3D-printed Acropora coral …


Optimizing Wind Turbine Blades Using Fiber-Reinforced Composites, Rayan A. Akeel May 2026

Optimizing Wind Turbine Blades Using Fiber-Reinforced Composites, Rayan A. Akeel

Discovery Day - Daytona Beach

This project explores how fiber-reinforced materials can improve wind turbine blade performance by making them lighter and more durable. It will examine different fiber types, their fabrication methods, and their impact on efficiency and strength.


Modeling Psychological And Demographic Predictors Of Analog Astronaut Mission Participation, Christian Yeara Herrero, Frányerson R. López Ochoa, Mackenzie Thomas, Phoebe Fleshman May 2026

Modeling Psychological And Demographic Predictors Of Analog Astronaut Mission Participation, Christian Yeara Herrero, Frányerson R. López Ochoa, Mackenzie Thomas, Phoebe Fleshman

Student Research Symposium (SRS)

As plans accelerate to send humans into orbit and to other celestial bodies, whether to lunar outposts, Mars bases, or commercial space stations, it becomes increasingly important to understand how to maintain healthy, cohesive, and productive crews in confined, isolated environments. A practical way to study human adaptation to these conditions is through analog astronaut missions on Earth. Although imperfect, these facilities provide the closest Earth-based simulation of space mission conditions. Currently, over ten analog research centers are operating worldwide, including NASA’s Human Exploration Research Analog (HERA) and the Crew Health and Performance Exploration Analog (CHAPEA) habitats. Selecting and recruiting …


Trussworthy - A Lunar Module Truss System, Anthony Wehrli, Sebnem Kalayci, Tyler Williams, Sofia Lopez-Linares Perez, Connor Mcdonagh, Presley Robb May 2026

Trussworthy - A Lunar Module Truss System, Anthony Wehrli, Sebnem Kalayci, Tyler Williams, Sofia Lopez-Linares Perez, Connor Mcdonagh, Presley Robb

Undergraduate Research and Scholarship Symposium

TrussWorthy is a modular truss-based construction platform designed to support the gradual development of sustainable infrastructure on the lunar surface. Aligned with NASA’s Moon to Mars objectives, the system emphasizes in-situ resource utilization (ISRU) by transforming lunar regolith into structural components through sintering and additive manufacturing. By reducing dependence on Earth-supplied materials, TrussWorthy aims to lower launch costs while enabling scalable, long-term construction capabilities. The design integrates autonomous excavation, 3D printing, and robotic assembly, building on technologies expected from upcoming Artemis and Commercial Lunar Payload Services missions. Engineered to withstand extreme thermal cycling, vacuum conditions, and reduced lunar gravity, the …


Agentic Scientific Machine Learning For Autonomous Model Discovery In Systems Pharmacology, Nazanin Ahmadi, George Karniadakis May 2026

Agentic Scientific Machine Learning For Autonomous Model Discovery In Systems Pharmacology, Nazanin Ahmadi, George Karniadakis

Biology and Medicine Through Mathematics Conference

No abstract provided.


Development And Characterization Of Sulfur-Based Concrete From Industrial Waste By-Products, Vasilia Numan Rabah Alkhaldi May 2026

Development And Characterization Of Sulfur-Based Concrete From Industrial Waste By-Products, Vasilia Numan Rabah Alkhaldi

Thesis/ Dissertation Defenses

Portland cement (PC) is a significant player in the construction industry, which is one of the largest global carbon footprint sectors, contributing approximately 8% of total anthropogenic CO₂ emissions worldwide. In arid and developing countries such as the UAE, the negative impacts of PC are amplified by the piling of industrial wastes, and hence there is an urgent need to develop efficient and cost-effective waste management solutions. This dissertation reports on the design and characterization of a novel sulfur-based concrete made from locally available industrial waste materials, with an emphasis on improving the performance and durability of the material as …


Native Wayland Compositing On Apple Ecosystems: Assessing The Feasibility Of “Wawona” Compositor, Alex Spaulding May 2026

Native Wayland Compositing On Apple Ecosystems: Assessing The Feasibility Of “Wawona” Compositor, Alex Spaulding

2026 Symposium

The Wayland display protocol is the modern standard for Linux window management, emphasizing security, performance, and simplicity. Expanding this ecosystem to macOS, iOS, and Android introduces technical hurdles due to proprietary windowing systems and divergent hardware APIs. This research evaluates the feasibility of developing a native Wayland Compositor for Apple and Android, given the closed nature of these ecosystems.

“Wawona” bridges this gap by architecting a native Wayland Compositor capable of executing unmodified Linux applications. The methodology involves implementing the Wayland protocol stack into native abstractions leveraging Metal, Android’s graphics pipeline, and CoreAnimation.


Synthesis And Investigation Of Tungsten–Copper Oxide Composites For Enhanced Photocatalytic Applications, Janak Paudel, John Nichols May 2026

Synthesis And Investigation Of Tungsten–Copper Oxide Composites For Enhanced Photocatalytic Applications, Janak Paudel, John Nichols

Research and Creative Works Expo

No abstract provided.


Behavioral And Biomechanical Analysis Of Hand Movement Stability In Virtual Reality, M. J. M. Sunny, Dr. Aryabrata Basu May 2026

Behavioral And Biomechanical Analysis Of Hand Movement Stability In Virtual Reality, M. J. M. Sunny, Dr. Aryabrata Basu

Research and Creative Works Expo

This research investigates fine motor control in virtual reality (VR) using a buzz-wire style precision task. Participants guide a loop along a wire while motion telemetry captures hand stability and movement patterns. Results show that individuals with combined VR, gaming, and athletic experience demonstrate smoother trajectories and reduced jitter, highlighting how prior expertise influences performance in immersive motor tasks.


Brine Solidification And Metals Sequestration Using Lignocellulosics, Frank Kvietok May 2026

Brine Solidification And Metals Sequestration Using Lignocellulosics, Frank Kvietok

World of Coal Ash Proceedings

Coal ash has historically been used as a convenient, on-site solidification material for brines generated from flue gas desulfurization at power plants. As alternate utilization scenarios are developed for coal ash, lignocellulosic (wood-based) sorbents can serve as a highly efficient substitute for the solidification process. Results will be shared for a variety of different brine types: thermally reduced, thermally reduced and neutralized, and reverse osmosis. In addition to solidification performance, which demonstrated a 3-4x mass of liquid vs mass of sorbent factor, studies were conducted to quantify the strength of binding to the wood-based sorbent for a broad range of …


Practical Guidelines For Pump Testing Of Ccr: Workflow, Design, And Lessons Learned., Nathanial Keller, Brian Hennings, Vic Modeer, Katie Moran May 2026

Practical Guidelines For Pump Testing Of Ccr: Workflow, Design, And Lessons Learned., Nathanial Keller, Brian Hennings, Vic Modeer, Katie Moran

World of Coal Ash Proceedings

This session presents a streamlined approach for pump testing of coal combustion residuals (CCR) to maximize hydraulic information with limited well installations, variable pumping rates, and short tests. Pre-test forward modeling identifies well offsets (typically 5–10 ft) and test durations (~2–6 hours) to yield measurable and analyzable drawdown at observation wells despite low pumping rates. Field execution consists of short step-drawdown testing to evaluate well specific capacity and select pumping rates for a constant rate test with one or more observation wells. Test results facilitate analysis of transmissivity and storativity of the CCR. Applied at two Midwestern sites with different …


Simplified Approximate Procedure For Assessing The Implications Of Updated Usgs Seismic Hazard Models On Seismic Stability Assessments Of Ccr Impoundment Facilities, Nick Mcclung, Matt Bishop, Adrian Pena-Iguaran, Seda Gokyer-Erbis May 2026

Simplified Approximate Procedure For Assessing The Implications Of Updated Usgs Seismic Hazard Models On Seismic Stability Assessments Of Ccr Impoundment Facilities, Nick Mcclung, Matt Bishop, Adrian Pena-Iguaran, Seda Gokyer-Erbis

World of Coal Ash Proceedings

Selection of appropriate seismic design ground motions remains a key challenge for seismic stability assessments of coal combustion residual (CCR) impoundment facilities, particularly where regulatory guidance does not specify a required hazard model. This paper examines the implications of using Uniform Hazard Spectra (UHS) derived from the 2014 versus the 2018 U.S. Geological Survey (USGS) National Seismic Hazard Model (NSHM) for seismic amplification and stability evaluations of the Tennessee Valley Authority (TVA) Widows Creek Fossil (WCF) Plant CCR Management Units. The 2018 NSHM incorporates updated understanding of seismicity in the central and eastern United States and generally predicts higher ground …


Before The Limit Hits: Lessons From A Proactive Construction Air Monitoring Program, Brian Egan, Nicholas Golden, Wendy Depp May 2026

Before The Limit Hits: Lessons From A Proactive Construction Air Monitoring Program, Brian Egan, Nicholas Golden, Wendy Depp

World of Coal Ash Proceedings

This presentation describes a comprehensive air monitoring program designed to protect workers and nearby neighborhoods during ash pond closure work. The program uses three main components: project (or boundary) monitoring at the site perimeter to track dust near the project boundaries, work area monitoring placed near active construction zones, and personal sampling on individual workers at regular intervals. Together, these approaches provide data on both community impacts and worker exposures, helping the team respond quickly when levels approach action limits. The Teams actions prior to exceedance of regulatory limits has helped prevent exposures. The talk will explain how monitors are …


Integrating Advanced Geochemical Workflows With Modern Statistical Tools To Improve The Decision-Making Process At Ccr Sites, A Case Study, Glenna Thomas May 2026

Integrating Advanced Geochemical Workflows With Modern Statistical Tools To Improve The Decision-Making Process At Ccr Sites, A Case Study, Glenna Thomas

World of Coal Ash Proceedings

While statistical assessment provides the foundation for CCR compliance reporting, incorporating a holistic geochemical framework transforms statistics from a compliance requirement into a powerful predictive tool. Strategic geochemical insight established the basis of understanding needed to support successful statistical approaches and to ensure that statistical outcomes reflect actual groundwater behavior. Whether it is trend analysis, delineating source mechanism, or updating geochemical conceptual site models (GCMs), geochemical context provides the technical foundations for statistical outputs and methods. A continuously refined GCSM enhances the ability to anticipate how groundwater chemistry should evolve, improving interpretation and predictive capability. This allows practitioners to understand …


Monitored Natural Attenuation Evaluation And Additional Characterization Of A Ccr Unit Lithium Groundwater Plume, Matt Barickman, Adam Piestrzeniewicz Pg May 2026

Monitored Natural Attenuation Evaluation And Additional Characterization Of A Ccr Unit Lithium Groundwater Plume, Matt Barickman, Adam Piestrzeniewicz Pg

World of Coal Ash Proceedings

Monitored Natural Attenuation (MNA) refers to the reliance on natural attenuation processes (within the context of a carefully controlled and monitored site cleanup approach) to meet groundwater protection standards (GPS) for a CCR unit within a reasonable time frame (USEPA, 1999). MNA is being evaluated as an adaptive management strategy for a CCR unit groundwater plume with statistically significant lithium concentrations above GPS, though with little risk of offsite migration. A previous MNA evaluation was performed for the lithium plume following the United States Environmental Protection Agency (USEPA) “tiered lines of evidence approach” (USEPA, 2015), which determined that there were …