1 / 21

THE CONCEPTUAL SITE MODEL A Visual Journey Though Data and Time

THE CONCEPTUAL SITE MODEL A Visual Journey Though Data and Time. October 29, 2013. Conceptual Site Model _. WHAT IS A CONCEPTUAL SITE MODEL ?. Conceptual Site Model _.

kiana
Download Presentation

THE CONCEPTUAL SITE MODEL A Visual Journey Though Data and Time

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. THE CONCEPTUAL SITE MODELA Visual Journey Though Data and Time October 29, 2013

  2. Conceptual Site Model _ WHAT IS A CONCEPTUAL SITE MODEL ?

  3. Conceptual Site Model _ A Conceptual Site Model (CSM) describes site features and surface/subsurface conditions to understand contaminants and the risk(s) they pose to receptors.

  4. Conceptual Site Model _ A CSM is included in the Part 213 definition of RBCA which directly references the ASTM: Standard guide for development of conceptual site models and remediation strategies for light nonaqueous-phase liquids released to the subsurface, designation E 2531-06 E1, which references the Standard guide for development of conceptual site models for Contaminated Sites, designation E 1689-95 (Reapproved 2008), which states (paraphrased): A CSM is a written or pictorial representation of an environmental system and the processes that determine transport of contaminants from sources to receptors.

  5. Conceptual Site Model _ A CSM describes site conditions by: Identifying sources, pathways and receptors for contamination. Identifying critical biological, chemical or physical processes. Identifying the presence (and absence) of contamination.

  6. Conceptual Site Model _ The CSM is an EVOLVING document.

  7. Conceptual Site Model _ DEVELOPMENT OF A CONCEPTUAL SITE MODEL

  8. Conceptual Site Model _ Scope Summary Sources Pathways and Receptors Narrative and Visual Description

  9. Conceptual Site Model_ Scope of the Conceptual Site Model What Needs to be Characterized Extent of Area to be Investigated Human and/or Ecological Receptors Contaminants of Concern (COCs) Applicable Remedial Criteria Immediate/Long Term Environmental Concerns

  10. Conceptual Site Model _ 2. Summarize Available Information Property Description Historical Information Off-site and Regional Information Geologic and Hydrogeological Information Other

  11. Conceptual Site Model _ Identify and Characterize Sources Operational and Ownership History Current and Historic Releases Location and Content of Releases Extent/Volume/Mass Prior Remedial Actions

  12. Conceptual Site Model _ 4. Identify Pathways and Receptors - Exposure Pathways Current Potential Future Use - Human and/or Ecological Receptors

  13. Conceptual Site Model _ 4. Identify Pathways and Receptors

  14. Conceptual Site Model _ 5. A Narrative and Visual Description Puts all the pieces together in a summary fashion for the site as it is understood at that time. The CSM should describe the site, contaminants, pathways, and receptors. More complex sites should include a discussion of data gaps or uncertainties. Note: this is probably the most critical part of a CSM. You need to be able to provide a clear description of your model and graphics with an explanation are a great way to do this.

  15. Conceptual Site Model _ LET THE FUN BEGIN…

  16. Conceptual Site Model _

  17. Conceptual Site Model _

  18. Conceptual Site Model _

  19. Conceptual Site Model _

  20. Conceptual Site Model _ The Narrative: A release of NAPL occurred from a dispenser. That NAPL migrated into the subsurface and migrated along a clay layer at 10 feet and then entered an aquifer 30 feet west of the source. The NAPL then pancaked in a classical fashion and created a groundwater plume that is migrating to the NE. That plume included BTEX at levels representative of a NAPL source and has migrated 260 feet down-gradient. The source area presents a VI risk but soil vapor data indicate that the risk is contained and has not reached any structures. Down-gradient drinking wells are in the path of migration of the dissolved phase…

  21. Conceptual Site Model _ Contact Information Joseph DeGrazia, C.P.G. Senior Geologist Michigan Department on Environmental Quality Remediation and Redevelopment Division Southeast Michigan District Office (586) 753-3812 degraziaj@michigan.gov

More Related