Site Characterization

When a release from a regulated tank system has been confirmed, OPS requires the owner/operator of the tank system to characterize the release.

The purpose of site characterization is to:

Significant advancements have been made over the past few decades in characterization project planning, execution and available tools. OPS recommends utilizing these tools and practices for a release event, as they have demonstrated an ability to increase the understanding of the release, reduce the project life cycle of a release, lead to targeted remedial efforts and reduce the total project costs. 

The information provided below will identify OPS expectations for conducting complete characterization efforts for the purpose of assessing the risk associated with a petroleum release. The data gathering and data evaluation components of site characterization must be summarized in the Conceptual Site Model for the release.

 Additional Resources

ITRC Accelerated Site Characterization

ITRC Characterization and Remediation in Fractured Rocks

ITRC Direct Push Wells

ITRC Groundwater Statistics and Monitoring Compliance

ITRC Incremental Sampling Methodology

ITRC LNAPL Guidance Update

ITRC Mass Flux and Mass Discharge

ITRC Passive Samplers

ITRC Risk Assessment

ITRC Triad Approach

Colorado Division of Oil and Public Safety

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

Phone: 303-318-8525

Light Non Aqueous Phase Liquids (Free Product)

Petroleum Vapor Intrusion


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