Conventional site characterization approaches very often lead to underperforming or failed remedies. You need a high level of confidence in site characterization data in order to develop a successful remediation strategy.

When you are ready for a more cost effective and reliable approach, we can help.  High resolution methods, dynamic work strategies, and state-of-the-science technologies, combined with a large geographic footprint and breadth and depth of resources, mean Cascade can provide the site characterization help you need.

Building a Conceptual Site Model (CSM) is where it all starts. You need an accurate and detailed understanding of site conditions and processes in order to make good site management decisions.

We combine high resolution site characterization technologies including: direct sensing, aquifer profiling, soil coring, soil gas sampling, unique diagnostic indoor air sampling and analysis; coupled with fully defensible onsite analytical chemistry and 3D data visualization to help you build accurate CSMs.  

Typically 75% or more of the mass discharge of a plume occurs across just 5 to 10% of the total cross sectional area of the plume.  Sources are commonly located in a relatively small volume of the subsurface. These traits provide an opportunity for surgically focused remedial designs that maximize cost effectiveness while ensuring the desired outcome.

Integrating our site characterization capabilities with our extensive suite of remedial technologies ensures that, once the CSM is tested, you can select and design an optimal remedy with confidence. Since we offer nearly all types of remedial technologies, we provide an unbiased recommendation.

You will have a real-time, high-resolution understanding of:

  • The spatial distribution of contaminant mass
  • Identity of the contaminants
  • Attenuation mechanisms
    • Hydrodynamic dispersion
    • Phase changes
    • Sorption
    • Diffusion into low permeability zones
    • Biotic and abiotic degradation
  • Hydrostratigraphy
  • Lithology
  • Hydrogeology
  • What sustains the plume
    • DNAPL/LNAPL
    • Back diffusion
    • Desorption from aquifer solids
High Resolution Site Characterization

High Resolution Site Characterization (HRSC) is accomplished through the acquisition and analysis of data at spatial scales commensurate with the spatial structure of the key variables like concentration, hydraulic conductivity, hydraulic head, and lithology.  In most porous media these special scales are in the sub-foot range and horizontal scales are a few tens of feet. At many, if not most sites, this type of higher resolution investigation is essential for confident decision-making required to support cost effective remediation.   

Our experienced professionals provide guidance and support in selection and implementation of the best technologies for the site conditions. You can rely on our extensive suite of technologies implemented by the best field teams in the business and backed by the drilling and direct push power of Cascade.

Cascade offers state-of-the-science technology and applications

  • WATERLOOAPS™ vertical aquifer profiling
  • Membrane interface hydraulic profiling (MiHPT)
    • Cone penetrometer testing
    • Electrical conductivity
  • Ultra-Violet Optical Screening Tool (UVOST)
  • Saturated soil core profiling
  • Mass flux/mass discharge assessments
  • Automated real-time diagnostic indoor air sampling and analysis
  • COREDFN™ matrix diffusion analysis
Sampling

Cascade provides a variety of equipment and techniques for a complete range of environmental sampling in any condition.  

We offer sampling for:

  • Soil
  • Groundwater
  • Soil Gas / Vapor Intrusion
  • Surface water/Sediment
3D Data Visualization

High resolution data collected in 3D is a critical component of conceptual site models. However, it also makes it difficult to assimilate the data into a coherent understanding of site and contaminant conditions using conventional data display tools.  A well-executed 3D interpolation and visualization program can assist in understanding and communicating site conditions, and save substantial time and money.

As part of a complete data management system, we utilize C Tech’s Earth Volumetric Studio, the gold standard in earth science software.  Earth Volumetric Studio includes the capabilities of C Tech’s former Environmental Visualization System Pro and Mining Visualization System (MVS) within a more powerful, easy-to-use environment.  Features include: borehole and sample posting; parameter estimation using expert system driven 2D and 3D kriging algorithms with variogram development tools and model fitting; exploding geologic layers; finite difference and finite element modeling grid generation; advanced gridding; comprehensive Python scripting of virtually all functions; high level animation support; interactive 3D fence diagrams; multiple analyte data analysis, integrated volumetrics and mass calculation for soil and groundwater contamination.

However, as with all software modelling packages, if one puts garbage in, one gets garbage out. We strive to provide sophisticated, and reliable, 3D interpolation through an understanding of geologic, hydrogeologic and geochemical processes.  As well as a depth of understanding of the geostatistical principles and processes that create the images.

Ask A Professional
Seth Pitkin

Seth Pitkin

National Director, Site Characterization Services

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