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.
Software Programs:
Tier 1 RBCA
Tier 2 Version 2.51 RBCA Software & Tier 2 Version 3.00 RBCA Software is the latest update of Tier 2 / SMR software. For new leaking underground storage tank sites undergoing the Iowa risk based corrective action process that results in a Tier 2 Site Cleanup Report to be completed, the Tier 2 Software Version 3.00 should be used. This does not apply to non-granular bedrock and granular bedrock sites. This is effective May 22, 2010.
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.