The Leaking Underground Storage Tank (LUST) team oversees assessment and clean up releases from petroleum underground storage tanks.
LUST Site Assessment
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.
The purpose of the Tier 1 assessment is to use limited site data and conservative assumptions to determine whether a site poses an unreasonable risk to public health, safety or the environment. The first form below is known as the Tier 1 report. The Tier 1 Report is followed by a guidance document.
Tier 1 Software
Due to regulatory changes and compatibility issues with newer operating systems, the Tier 1 software and Tier 1 software guidance have been removed from the UST web page. The Tier 1 software should no longer be used or submitted with the Tier 1 Report.
The Tier 1 Guidance document has been revised to include the Pathway Evaluation Worksheet (Appendix H). The worksheet or flowcharts can assist with completing the Tier 1 Report.
The Tier 1 Report must now be completed using current DNR Form 542-0165, which has been updated to reflect regulatory changes. If you have questions regarding the new Tier 1 reporting procedures, please contact the DNR project manager.
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. The purpose of Tier 2 assessment is to collect additional site-specific data and, with the use of Tier 2 fate and transport modeling, determine what actual and potential receptors could be impacted by chemicals of concern.
A Tier 2 Site assessment must be conducted and a Site Cleanup Report submitted for all sites when any of the following conditions occur:
Free phase petroleum product is present at the site.
The site owner or tank owner/operator has decided to bypass the Tier 1 assessment and go directly to the Tier 2 assessment phase.
A pathway has failed the Tier 1 assessment.
During drilling, bedrock was encountered before groundwater.
Explosive vapor levels were measured during a Tier 1 assessment or recent investigation of the site.
Tier 2 Guidance along with application will help you to fill out the assessment report. The application will perform the same functions as the former software in essentially the same ways.
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. The Tier 2 Site Cleanup Report Guidance has been updated. This update of the Tier 2 Guidance was undertaken in an effort to make the document more user-friendly and to better reflect current practice. You will find most items unchanged; however, some of the updates include:
Tier 2 Guidance is now a searchable document in a user-friendly format with embedded links.
New guidance on surface water risk assessment.
The stabilization time for soil gas sampling (Option 2) has been changed to 24 hours. This change will take effect 60 days after the new Tier 2 Guidance is posted to allow for projects already in progress. This has been effective since September 6, 2015.
A section on diving plumes and free product has been added.
Please see the Tier 3 Site Assessment section in Tier 2 Guidance.
Please note the BR SLUG Version 3 User’s Manual and files are large documents and may take some time to download from the web site.
Create a new directory on your hard drive and label it BRSlug3.
Download the files brslugver3 using WinZip® to the directory by clicking the .zip file and selecting Extract all Files.
This will start the Extraction Wizard. As a precaution, scan the files for viruses if you have antivirus software.
Click Next, and then on Browse... to select the new directory created on the hard drive.
Click Next and extract the files to the directory. Click on the Finish button to close the WinZip® Extraction Wizard. There will be thirteen files:
BRSlug1.CAB
BRSlug2.CAB
BRSlug3.CAB
Example 1 Class.br2
Example 2 Class.br2
Example 3 Class.br2
Example 4 Class.br2
Example 5 Class.br2
Example 6 Class.br2
Example 7 Class.br2
Example 8 Class.br2
setup.exe
SETUP.LST
Double click on setup.exe. This will start the installation program for BR SLUG Version 3. After installation, the application will be shown in Start, All Programs as BRSlug V3.0
All Site Monitoring Reports (SMRs) for bedrock sites should be completed using the Tier 2 Bedrock Software, version 1.20. For bedrock sites, there is no SMR module within the software program. Annual site monitoring data may be input into the version 1.20 file and software rerun to determine pathway classifications. Please indicate in a cover letter whether the report is a Tier 2 or SMR.
All data for the site, including the most recent sampling event should be entered into the analytical data sections of the bedrock model. This is different from standard Tier 2 modeling, in which data is entered into an SMR module.
Certified Labs & Analytical Methods - Analyses performed to provide data to be submitted to the Department of Natural Resources (DNR) must be accomplished through laboratories certified for the parameters being measured.
Document Search - The Iowa DNR UST Section is a part of a department-wide Electronic Records Project, working to index and digitize all records related to LUST and UST facilities, and to make them available to the public online. This search interface allows easy searches by a variety of data such as program, city, county, or facility name. If you cannot find records for a LUST or UST site property, please contact the DNR Records Center. Search field tips: Program = LUST or UST, Facility ID = Registration #, Program ID = LUST #.
Landfarming - DNR program for the safe and effective remediation and disposal of petroleum contaminated soil (PCS).
