Conceptual Site Model

A CSM (Conceptual Site Model) is a written and illustrative description of the release site (based on all known environmental and site information) and is the primary communication tool utilized between all release stakeholders. A CSM is required in all reports submitted to OPS. CSM development is a dynamic process that continually incorporates new site information, beginning from release discovery through release closure.

A thoroughly developed CSM should identify the following:

OPS strongly recommends incorporating the Triad Approach early into the CSM development process. This approach identifies systematic project planning, real-time measurement technologies and dynamic work strategies as pillars that lead to reducing project uncertainty.

The following figure depicts the components of a CSM and reporting due dates.

Site characterization efforts lead to the development of an initial CSM. The CSM is continuously refined as corrective action efforts are implemented and new project data is gathered. It is important to know where your project is within the CSM, but it is also important to understand that this dynamic process is not linear and that new information may lead to reassessing work that has already been completed. Developing, refining and understanding the CSM will lead to targeted risk reduction and reduced project time and costs. The following sections identify the components of the CSM.

 Additional Resources:

ASTM Standard Guide for Developing Conceptual Site Models for Contaminated Sites

Conceptual Site Model Checklist

Colorado Division of Oil and Public Safety

633 17th Street, Suite 500, Denver, CO 80202

Phone: 303-318-8525


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