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.
Tier 1 Assessment
Tier 2 Assessment 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
Tier 3 Assessment
BR Slug Software
Corrective Action Design Report (CADR) Guidance
For updates and guidance, see also the Groundwater Professional Bulletin Board.