LUST Site Assessment

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DNR events have been cancelled due to the Covid-19 outbreak. Safety of our users, attendees, partners and staff is most important. When possible, events will be rescheduled and that information will be distributed accordingly. Please check this site frequently for the latest closures, postponements and updates.

The documents linked to this page all relate to the assessment of sites where leaking underground storage tanks (LUST) are or have been located. The process of assessment uses risk-based corrective action (RBCA). The objective of RBCA is to evaluate the risks posed by contamination to human health, safety and the environment using a progressively more site-specific, three-tiered approach. All proposed corrective actions must be submitted and supervised by a certified groundwater professional.

If necessary, you can receive copies of these documents by contacting Bonnie Garrison at 515-725-8310 or Bonnie.Garrison@dnr.iowa.gov.

UST / LUST Resources

Software Programs:

Tier 1 RBCA

Tier 2 The web-based application will be used for new and revised Tier 2 Site Cleanup Reports, and Site Monitoring Reports. This does not apply to non-granular bedrock and granular bedrock sites. Please review the FAQ document posted on the DNR UST web page prior to using the application for RBCA purposes.

Tier 2 Bedrock Version 1.20

RBCA Tier-3 Analysis

BR Slug Software

For updates and guidance, see also Tank Memos and the Groundwater Professional Bulletin Board.