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The Conceptual Site Model

The Conceptual Site Model. Kyle Newman VDEQ. What Is It?. A description of hypothesized relationships between sources, the environment, and receptors. What has happened What is happening What will happen. Example Conceptual Site Model. Figure of Conceptual Site Model.

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The Conceptual Site Model

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  1. The Conceptual Site Model Kyle Newman VDEQ

  2. What Is It? A description of hypothesized relationships between sources, the environment, and receptors • What has happened • What is happening • What will happen

  3. Example Conceptual Site Model

  4. Figure of Conceptual Site Model

  5. Vapor Intrusion Conceptual Model IRTC, 2007

  6. Why Create a Formal CSM? • Helps plan site investigations • Provides context for site • Helps evaluate efficacy of investigation • Allows reviewers to evaluate the “same” site

  7. CSM and Project Planning • Should be created before site investigation (“Problem Formulation”) • Identification of data gaps- Phase I and UST needs vs. VRP SCR and Risk Assessment needs • Complete CSM will help determine type, location, and number of samples required • Account for VRP Risk Assessment assumptions

  8. What Makes a “Good” CSM? • Site history full documented • Locations and types of potential releases identified • Fate and transport of environmental contaminants examined • All Potential current and future receptors identified • Iterative- CSM changes as data are collected

  9. Presentation • Useful as separate section in SCR • Provide as a narrative • Figures helpful

  10. Questions?

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