Videos and webinars

Why scanning first changes everything

Too many teams are stuck making high-stakes decisions with low-confidence data. Aestus replaces uncertainty with insight. Our high-resolution subsurface imaging reveals what maps and monitoring wells miss, so you can stop drilling blind and start making smarter, faster decisions that move your project forward.

Scan first & then drill and remediate

Traditional drilling-only approaches often miss contamination and lead to costly cleanup delays. Aestus uses GeoTrax Survey™ to scan first, producing tens of thousands of data points and building a far more accurate site model. This lets teams drill smarter, remediate faster, and avoid wasted effort.

Finding groundwater faster, without drilling blind

When local towns needed a new water source, guessing wasn’t good enough. Aestus used GeoTrax Survey™ to scan a wide rural site and identify precise well locations. Instead of wasting time and money on dry holes, the client could drill with confidence and deliver clean groundwater to their community.

Imaging through the noise: Solving a busy urban plume

Old gas stations left behind a complex hydrocarbon plume beneath a high-traffic commercial area. Aestus used GeoTrax Survey™ to scan without disrupting businesses and built a clear 3D model. The result: targeted drilling, faster cleanup, and major cost savings.

The Aestus quarterly webinar series

Stay current with Aestus through our quarterly webinar series, where we share project insights, highlight new applications of subsurface imaging, and provide practical guidance for tackling today’s most pressing environmental and groundwater challenges.
Karst doesn't follow the rules
Learn field-tested methods to characterize karst voids and flowpaths, avoid blind drilling, and reduce risk and cost through advanced subsurface imaging.
Time-Lapse Geophysical Monitoring
Explore efficient, modern methods for characterizing and monitoring LNAPL sites. See how TERI technology for detailed imaging of LNAPL distribution, weathering, and bioactivity using time-lapse data reveals flowpaths and plume behavior.
Finding fractures: A smarter approach to bedrock contamination
See how a scan-first approach with GeoTrax reveals hidden contamination, increases data density, and delivers more accurate site models so cleanup happens faster, with less risk and cost.
Smarter groundwater monitoring without more wells
Learn how electrical imaging delivers a clearer, high-density view of groundwater flow and change over time—without relying on more wells. Ideal for long-term monitoring and smarter aquifer management.

The Aestus / True Blue webinar series

Join Aestus and True Blue Technologies for a webinar series that dives into real-world projects, explores breakthrough imaging strategies, and answers your questions about solving complex subsurface challenges.
Finding fractures: A smarter approach to bedrock contamination
See how a scan-first approach with GeoTrax reveals hidden contamination, increases data density, and delivers more accurate site models so cleanup happens faster, with less risk and cost.
Smarter groundwater monitoring without more wells
Learn how electrical imaging delivers a clearer, high-density view of groundwater flow and change over time—without relying on more wells. Ideal for long-term monitoring and smarter aquifer management.
Seeing deep in fractured rock: Finding hidden flow paths
Learn how electrical imaging can reveal subsurface structures like fractures and deformation bands that control contaminant movement. This case study shows how deeper insight into site geology can unlock more effective and cost-efficient remediation options.
Catching groundwater in motion: Building flow nets with electrical imaging
This session shows how electrical imaging can reveal the hidden pathways contaminants and groundwater follow underground. You’ll learn how to map flow directions, identify preferential paths, and support better site decisions with data from thousands of subsurface points not just a few wells.
How electrical imaging helped save $4m at a challenging sediment site
This 30-minute case study shows how high-resolution imaging identified bioactive discharge zones, refined the site model, and guided a smarter remedy cutting long-term O&M costs by 90%.
How imaging helped resolve a deep diesel spill in complex carbonates
This 30-minute case study walks through how high-resolution electrical imaging was used to locate diesel impacts at depth, guide targeted recovery, and successfully close a challenging municipal well site.
How imaging and biology supported MNA at a challenging LNAPL site
In this case study, you’ll learn how electrical hydrogeology helped reveal unexpectedly high biological activity and informed a monitored natural attenuation (MNA) remedy saving significant time and cost at a complex petroleum site.
How scanning and imaging supported bio-based cleanup at a dry cleaner site
earn how high-resolution imaging helped track bioremediation and pinpoint hard-to-reach PCE contamination. This case study shows how visualizing underground biology and chemistry reveals what’s working, what’s not, and how to close data gaps with precision.
Technology Selection Matrix

The Subsurface Technology Selection Matrix

Choose the right subsurface tool for your jobsite.

Not sure which technology to use for site characterization? We’ve got you covered.

Our free Subsurface Technology Selection Matrix helps you match your project size and goals with the right scanning tools. Whether you’re chasing contamination, mapping groundwater, or planning remediation, this guide gives you the clarity you need to move forward with confidence.
This guide will help you…
  • Avoid wasted time and budget on tools that don’t fit your site needs
  • Learn the strengths and limitations of each major subsurface technology
  • Get expert guidance on when to scan, drill, or combine both for best results

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Madison Culver
Madison Culver, M.Sc.
Staff Geologist / Field Technician
Since joining Aestus in 2024, Madison has performed various project tasks including field data acquisition, data integration and analysis, 2D and 3D visualization, and project report development.

As an undergraduate at Oklahoma Sate University, Madison utilized electrical resistivity imaging to locate a drilling target for a municipal water well in rural Oklahoma. Her Master’s degree, also from Oklahoma State University, focused on the production and laboratory testing of a novel groundwater tracing particle for use in a sole source aquifer.

Madison previously worked at an environmental consulting firm in Dallas, Texas, where she performed soil/groundwater investigations/reporting, PFAS sampling programs, and Environmental Site Assessments.

Madison is based out of Irving, Texas.
Michelle Lahti
Michelle Lahti, PACE
Administrative Director
Since joining Aestus in 2021, Michelle has supported the CEO and other managers in their day-to-day needs. She also manages human resources and all elements of the many conferences Aestus attends. Michelle works hard to ensure that the needs of stakeholders are addressed in all steps of the business process when working with our clients.
Michelle has a bachelor’s degree in Avionics Engineering Technology from Embry-Riddle Aeronautical University. She also has experience as a small business owner, and over 15 years’ experience as an executive assistant in many different industries. She has her Professional Administrative Certification of Excellence (PACE) through the American Society of Administrative Professionals (ASAP).
Michelle is based out of Wellington, Colorado.
Autumn Town
Autumn M. Town, M.Sc.
Staff Geologist / Field Technician
Autumn performs various project tasks for Aestus, including field data acquisition, data integration and analysis, 2D and 3D visualization, and project report development. Since joining Aestus in 2023, she has helped meet project objectives such as mapping stratigraphy, identifying areas of contamination, and characterizing preferential flow pathways at complex sites across the United States.
As an undergraduate at Oklahoma State University, Autumn utilized electrical resistivity imaging (ERI) to evaluate the hydrogeologic effects of PFAS-containing firefighting foams. While completing her Master’s degree, also at Oklahoma State University, she focused primarily on sedimentology and stratigraphy as she studied the effects of depositional and diagenetic processes on porosity development in a tight gas sandstone reservoir.

Autumn is based out of Tulsa, Oklahoma.
Morgan Love
Morgan Love, M.Sc.
Senior Project Geologist
Morgan has been a part of the Aestus team since 2012. She supports all aspects of data integration for Aestus in 2D and 3D space, including modeling of geophysical, geochemical, and geologic data. She also performs geophysical data processing and develops quality control and automation protocols to ensure data integrity.

Prior to Aestus, Morgan used her environmental geology undergraduate degree working for a water resource company, a geosciences software company, and a seismic data acquisition company. She holds a Master's Degree in Computer Information Systems.

Morgan is based out of Fort Collins, Colorado.
Grant Eastman
Grant Eastman
Equipment Manager / Field Technician
Grant maintains all our equipment and vehicles at a firehouse ready status in order for the field team to be ready to mobilize at moment’s notice. He also troubleshoots any technical issues that come up as well as being a member of the field team.

Grant graduated from Colorado State University with a degree in Watershed Science. After graduating he completed 8 years of military service with the Colorado Army National Guard, including two deployments to the middle east. Before joining Aestus, he was a senior technician building custom automation equipment and wire harness mockups for aerospace companies.

Grant is based out of Milliken, Colorado.
Samantha Frandsen
Samantha Frandsen, M.Sc, P.Gp.
Hydrogeophysicist / Project Manager
Since joining Aestus in 2018, Samantha has performed all aspects of the Aestus project lifecycle, including acquisition field work, processing of geophysical data, data integration, 3D visualization, and reporting. As project manager, she oversees a variety of projects completed at complex sites across the United States and strives to help our clients efficiently leverage Aestus’ high-resolution GeoTrax Survey™ data to improve understanding of subsurface conditions.

Prior to her time with Aestus, she earned her Bachelor’s degree (magna cum laude) in Physics from the University of Richmond and taught high school physics as a Teach for America corps member. She then completed her Master’s degree (Distinction) in Exploration Geophysics at the University of Leeds in the UK. For her thesis, she utilized several different geophysical techniques to characterize the subsurface remains of a former gasworks facility for which she was awarded the GETECH award for best overall performance in the Independent Project and the Association for Industrial Archaeology’s Dissertation Award.

When she’s not investigating what’s below the ground, Samantha enjoys exploring all the above-ground fun her Stateline (South Lake Tahoe), NV home has to offer via trail running, mountain biking, and snowboarding.

Samantha is based out of Stateline, Nevada.
Michael McNair
Michael McNair
Project Geologist / Field Team Leader
Michael has worked on a variety of project types using Aestus’ electrical hydrogeology techniques to help Aestus’ clients succeed relative to characterization of contaminated sites, evaluating geohazards, municipal water well exploration, and monitoring subsurface changes over time. Michael currently manages Aestus’ field operations to collect high quality subsurface electrical imagery (GeoTrax Survey™) at rural, urban, and industrial sites with complex logistics. When not in the field, Michael is a key member of Aestus’ reporting team and leads or assists with 2D/3D data integration, QC, data interpretation, and reporting.

Michael previously worked at an environmental consulting firm in Dallas, Texas, where he performed soil/groundwater investigations in the field and subsequently developed reports. Michael earned a Bachelor of Science in Geology from Baylor University.

Michael is based out of Orlando, Florida.
Todd Halihan
Todd Halihan, Ph.D., P.Gp.
CTO/Data Interpretation Lead
Todd’s focus at Aestus centers on subsurface characterization using electrical hydrogeology and sustainable water supply. He is also a professor and the Sun Company Clyde Wheeler Chair in Hydrogeology at Oklahoma State University. He was the National Ground Water Association’s 2018 McEllhiney Lecturer and he is a founding member of the NGWAU program for groundwater outreach and education.

Dr. Halihan is the recipient of the American Institute of Hydrology’s C.V. Theis Award winner. He is also a professional geophysicist (CA), professional driller (OK) and a PADI divemaster.

Todd is based out of Stillwater, Oklahoma.
Stuart McDonald
Stuart W. McDonald, P.E.
CEO/Project Executive/Contracting
Stuart has dedicated over 20 years of his career overseeing the development of Aestus with the goal of empowering clients worldwide to gain more certainty in subsurface issues to make better technical decisions and save time and money on their projects. He has been involved in managing hundreds of projects for Aestus in the USA, Europe, Asia, and South America.

Stuart spent the first decade of his career as an environmental consultant primarily with Canonie Environmental and Harding Lawson Associates and gained experience performing cradle to grave site characterization and remediation work on high profile Superfund and other projects. This experience was the genesis of founding Aestus in 2001 as it became clear that the environmental industry needed more data density and more certainty for optimal decision-making on projects.

Stuart is based out of Loveland, Colorado.