Missouri Risk-Based Corrective Action (MRBCA) Revision Information

The April 2006 Departmental MRBCA technical guidance document was updated in June 2006 and June 2008. Information about any additional updates, revisions and rulemaking will be provided below when they become available. 

For questions, please contact the Department of Natural Resources' Brownfields/ Voluntary Cleanup Program at 573-526-8916 or by email at MissouriBrownfields@dnr.mo.gov. To receive MRBCA update email notifications, please use the green “Get Updates on this Issue” button on this webpage.

Currently there are no update, revision or rulemaking efforts taking place pertaining to Tanks MRBCA. 

The 2004 Tanks MRBCA technical guidance document was modified in March 2005 and updated in October 2013. Information about any additional updates, revisions and rulemaking will be provided below when they become available. 

• Nov. 6, 2009: The department issued an errata notice regarding Appendix D of the 2004 technical guidance. The 2009 Errata Notice pertained to an incorrect conversion factor, which was corrected in the 2013 technical guidance.
• June 3, 2011: The department issued an errata notice regarding Table 4-1, Soil Concentration Levels to Determine the Need for Groundwater Evaluation During Tank Closure, of the 2004 technical guidance. The 2011 Errata Notice pertained to incorrect target levels in the table for TPH-GRO, TPH-DRO, C6-C8 Aliphatics, C8-C10 Aliphatics, C10-C12 Aliphatics and C12-C16 Aliphatics.
• Sept. 17, 2013: Under the tanks MRBCA process, activity and use limitations (AULs) may be used as part of a corrective action plan to address risks associated with a petroleum storage tank release. To promote consistency and efficiency in applying AULs, the department developed model AULs and one- and two-party restrictive covenants.
• Oct. 17, 2013: The Hazardous Waste Management Commission gave final approval to the department’s amendments to Code of State Regulations 10 CSR 26-2.062, 26-2.078 and 26-2.082 and the updated Tanks MRBCA guidance document. The guidance update included changes to the Tier 1 Risk-Based Target Levels (RBTLs). The rule amendments were necessary to, in part, incorporate the updated Tanks MRBCA guidance into rule by reference. The amended rules became effective Feb. 28, 2014.
  • The department developed the Guidance Document Applicability for Tank Closures and Changes in Service and Investigations, Risk Assessment, and Corrective Action for Releases from Tanks Systems to explain which version of the Tanks MRBCA guidance document owners and operators and their consultants may use before and after the amended rules and updated guidance document become effective. 
• Jan. 8 , 2014: The department developed the Missouri Risk-Based Corrective Action Process for Petroleum Storage Tanks: 2013 Guidance Document Update - PUB2933 fact sheet to explain the differences between the 2004 Tanks MRBCA guidance and the 2013 updated guidance. 
• May 29, 2015: The department issued an errata notice pertaining to Figures 2-1 and 2-2 of the 2013 technical guidance. The 2015 Errata Notice pertained to the department inadvertently omitting the figures.
  • Missouri Risk-Based Corrective Action Program: Figure 2-1 Key Activities Under MRBCA and Figure 2-2 MRBCA Process Flowchart