Ashley Zuge is a geotechnical laboratory manager and senior technician, managing the day-to-day operations of the Green Bay, Wisconsin, geotechnical laboratory that delivers reliable testing services for projects such as landfill construction and remediation.
Ashley supports municipal, commercial, and industrial projects through comprehensive geotechnical laboratory testing and construction quality assurance services. She oversees testing workflows, data review, reporting, invoicing, and turnaround times. Her technical expertise includes sieve analysis, hydrometers, Atterberg limits, moisture content, standard and modified Proctors, hydraulic conductivity testing, organic content, specific gravity, and unit weight testing.
Ashley holds a bachelor’s degree in Comprehensive Geology with an Environmental Science emphasis from the University of Wisconsin–Eau Claire and passed the Association of State Boards of Geology Fundamentals of Geology exam in 2023.
What trends are you seeing in geotechnical laboratory testing evaluation for today’s projects?
In recent geotechnical laboratory testing, we’re seeing an increase in focus on remediation-driven projects. Many regulatory agencies now have a deeper experience with these types of initiatives, which has contributed to a more efficient review and approval process. As a result, remediation projects are advancing at a faster pace while still maintaining a strong emphasis on technical quality and compliance.
At our Green Bay geotechnical laboratory, we have taken on more remediation work as opportunities continue to present themselves. What was once primarily focused on landfill construction and traditional geotechnical support has expanded to include more remediation-related testing. We work closely with consulting firms, municipalities, and private clients that require reliable geotechnical testing services for their projects.
What should clients keep in mind when interpreting geotechnical lab data and using it to guide design and construction decisions?
The most important factor is ensuring that samples are representative of the material being evaluated. The quality of laboratory data is directly dependent on the quality of the sample received. If a sample does not accurately reflect in situ conditions, such as when soil type changes within a test pit or when sampling methods are inconsistent, the resulting data may not be appropriate for broader application.
For example, during winter months we occasionally receive frozen soil samples in Shelby tubes that are to be tested for hydraulic conductivity testing. When a sample freezes and then thaws, its internal structure can be altered, which may affect test results. We sometimes receive Shelby tubes containing excessive roots or organic material, which create pathways for water that may flow through those pathways rather than through the soil itself, influencing the outcome of certain tests.
Additionally, selecting the correct tests is essential. Clients typically base testing programs on regulatory requirements and must ensure the appropriate number and type of tests are conducted per soil type.
How do standardized testing methods, digital reporting, and in-house laboratory capabilities improve efficiency and reliability for projects?
Standardized ASTM International testing methods ensure consistency not only within our laboratory, but across other laboratories in the industry. Our laboratory participates in independent third-party proficiency testing programs to confirm that our procedures consistently meet industry standards. This helps confirm that our testing methods remain accurate, dependable, and aligned with ASTM International procedures, ultimately supporting timely, high-quality project delivery.
Digital reporting systems further strengthen reliability. Data entry tools help double-check calculations and reduce human error, increasing confidence in results. All reports undergo review by the laboratory manager or an appointed designee with extensive industry experience, ensuring accuracy, consistency, and adherence to standards.
Having an in-house laboratory also improves efficiency through direct and consistent communication, enabling better planning for incoming samples, improved timeline coordination, and a shared understanding of project progress that contributes to a more efficient project delivery.
How do you see the role of geotechnical laboratories evolving, and how is Tetra Tech preparing clients for future needs?
The industry is steadily incorporating more automation into its testing. For example, hydraulic conductivity boards can now collect readings throughout the duration of a test, reducing human error and improving consistency between operators. These advancements help standardize results and improve data quality.
However, not all testing can or should be fully automated. Certain procedures, such as hydrometer analysis, involve multiple variables that still require experienced technicians. While technology will continue to evolve, there remains significant value in trained professionals conducting tests and interpreting results.
Tetra Tech is also expanding our testing capabilities to meet new demands. In recent years, we have added new testing services and increased our involvement in remediation work. We continuously seek opportunities to strengthen our existing capabilities and introduce new testing methods that align with emerging industry needs. Much of this growth is intentionally planned and driven by synergistic opportunities, enabling us to expand in ways that provide meaningful value to our clients. By remaining adaptable and forward-thinking, we help clients prepare for future project requirements with greater confidence and efficiency.
How does Tetra Tech’s Green Bay geotechnical laboratory support timely, confident decision-making for municipal, commercial, and industrial clients?
We focus on delivering clear, concise, and technically sound reports in a timely manner. Our reports are structured so clients can quickly find the information they need, and they are tailored to project-specific requirements.
We consistently meet client turnaround times, and when challenges arise, we maintain communication. By staying closely connected with clients and understanding their priorities, we help ensure laboratory testing does not delay design or construction decisions. This combination of responsiveness and reliable data enables clients to move forward with clarity and confidence.