THE USE AND MISUSE OF THE UNIFIED SOIL CLASSIFICATION SYSTEM:
Understanding Soil Classification in the Field
Learn how accurate soil classifications and other descriptive elements are essential for:
- Well screen design and placement
- Preparation of reliable potentiometric surface maps
- Ground water monitoring system design
- Excavation and foundation design.
Soil classification is fundamental for geotechnical and environmental site characterization, and the Unified Soil Classification System (USCS) is the classification used in North America. Unfortunately, the industryís state-of-practice overlooks simple improvements to make the classification a useful characterization tool and often misuses the classification in site evaluation.
This 90-minute webinar begins with a brief historical perspective of the USCS followed by the step-wise procedures for classifying both coarse- and fine-grained sediments. Helpful tips are presented to make field classification easier and less confusing as well as to make the classification a better characterization tool by adding supplementary grain-size information, depositional environment interpretation, and site-stratigraphic unit information. Common ways the classification is misused are pointed out with helpful solutions.
This webinar will cover the following topics:
- Background of the USCS
- Coarse-Grained vs. Fine-Grained Sediments
- Laboratory Methods vs. Field Classification Techniques
- Particle Size Curves and how to understand them
- Poorly-Graded vs. Well-Graded
- Understand the Coefficient of Uniformity and the Coefficient of Curvature
- Lean Clay vs. Fat Clay vs. Silt
- Plasticity Chart and how it applies to fine-grained sediments
- Common mistakes and confusing terms.
- How the USCS applies to building the geologic framework, and how it doesnít.
- A simple Case Study that illustrates stratigraphic context for soil classification.
Tim J. Kemmis, PhD, PG
Senior Geologist Consultant and Project Manager
Tim Kemmis works as a senior geologist consultant and project manager for large-scale hydrogeologic investigations. His unique experience as both an applied researcher and consultant has enabled Tim to effectively teach staff at all levels how unravel sedimentary complexities by making fundamentally sound observations, preparing complete and accurate boring logs and confidently correlating geologic units.
Tim received his bachelorís degree in agricultural soil science from the University of Illinois and his masterís degree in glacial geology while working as a graduate assistant at the Illinois State Geological Survey.
He worked 14 years for the Iowa Geological Survey, during which he received his Ph.D., and where he:
- Carried out glacial sedimentologic investigations
- Remapped the Des Moines Glacial lobe
- Established the formal glacial stratigraphy for the lobe based on depositional environments
- Discovered a new type of hummocky glacial topography
- Determined the geometry and origin of jointing in glacial tills
- Developed a lithofacies code to decipher the history of glacial outwash and alluvial sequences
Tim is a co-founder of Midwest GeoSciences Group and has successfully taught many courses and webinars dedicated to improving boring logs and helping geologists think on their feet.
||299.00 USD Per Webinar
||Session Slides (PDF)
Record of Attendance Form (PDF)
|Number of Participants:
||Unlimited from a single computer (Broadcast webinar in your conference room or auditorium for no extra charge)
|Continuing Education Certificate:
||Unlimited. $19.95 each. Official CEU certificates are available as an option and are only at the time of webinar participation from Northern Illinois University. Ordering steps are given at time of webinar order.
||On-demand, anytime 24/7.
||Buy 3 on-demand webinars, and get 3 on-demand webinars for free!
||Tim Kemmis, PhD, PG Senior Geologist Consultant and Project Manager
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