Environmental Remediation Program fact sheet
Division of Environmental Quality Director: Kyra Moore

Use this checklist to ensure the information necessary for a complete Tank Closure Report is included in the report. Be aware that, as each site is different, the following may not address all issues at a particular site. The checklist includes most of the items that need to be addressed.

Missouri Risk-Based Corrective Action, or MRBCA, Forms and Notifications


  • Timeline of site activities
  • Cleanup target levels clearly stated
  • Reusable product recovered and its fate?
  • Number of tanks removed and their observed condition
  • Number of tanks left in place
  • Planned future use of site
  • Are new tanks to be installed on-site?
  • Amount of backfill and native soil removed and its fate
  • Concrete pad in pit and its condition?
  • Groundwater in pit? Removed? Recharge within 12 hours?
  • Bedrock present?

Site Maps

  • Drawn to scale
  • Current on-site buildings are identified
  • All adjacent property use is detailed
  • Location of tanks, excavation boundaries, product lines, dispenser islands
  • Depth of excavation
  • Underground utilities
  • Downgradient direction and degree of slope
  • North arrow
  • Locations of all obtained soil samples

Color Photos

  • Condition of the site before and after the closure is complete
  • The ends, sides and interior of each tank
  • The excavation floor and sidewalls
  • Tank pad if present
  • Bedrock if exposed
  • Product line and dispenser trenches
  • Sealed underground tanks/lines that are closed in place
  • Description of photos

Laboratory Data

  • Sample results from appropriately obtained samples (Section 4.4.2 of the MRBCA guidance for petroleum storage tanks)
  • Sample results for the appropriate contaminants of concern, or COCs, (Table 5-1)
  • If total petroleum hydrocarbons - diesel or oil range organics are detected, 25% (or a minimum of two, whichever is greater) of samples with highest concentrations must be analyzed for polynuclear aromatic hydrocarbons. Visit the Missouri Risk-Based Corrective Action for Petroleum Storage Tank Sites - Sampling for Polynuclear Aromatic Hydrocarbons - PUB2160.
  • Sufficient sample results from all soil returned to the pit to establish it was below clean up target levels for the site
  • Sufficient sample results for disposed soil
  • Background sample results for waste oil sites and pre-1980 gasoline tanks
  • Quality assurance or quality control documentation
  • A complete chain of custody with all signatures, as well as the dates and times the samples were obtained and subsequently relinquished to the laboratory and the temperature of the samples as they were received by the laboratory
  • Laboratory reporting limits must meet the required reporting limits as outlined in Table 5-3 of the Missouri Risk-Based Corrective Action for petroleum storage tanks guidance document

Tanks and Tank Cleaning

  • Photographic documentation and a signed statement by the party performing tank cleaning activities attesting to the proper cleaning of the tanks
  • A signed statement by the underground storage tank owner or the owner or operator of the receiving facility attesting to the fate of the underground storage tanks
  • Documentation about the fate of any usable product recovered from the underground storage tanks
  • Proper characterization of the sludge or rinsate generated during tank cleaning activities as well as the appropriate manifests signed by the generator, transporter and receiving facility of the waste

Soil and Water Disposal

  • Documentation of the proper disposal of contaminated soil (e.g. landfill disposal receipts, weight tickets)
  • Documentation of the proper disposal of contaminated pit water, including:
    • Signed statement of permission from the publicly owned treatment works prior to disposal.
      • Documentation of wastewater characterization required by the publicly owned treatment works
      • Appropriate documentation that the wastewater was accepted by the publicly owned treatment works

Other Possible Inclusions

  • If bedrock is encountered in the excavation, a geologic assessment performed by a registered geologist or a qualified professional engineer is necessary
  • If the cleanup target levels are above the default target levels, the domestic use of groundwater pathway must be evaluated in strict accordance with Section 6-3 and Figure 6-2 of the MRBCA guidance for petroleum storage tanks
  • If the cleanup target levels are for non-residential use, documentation on the reasonably anticipated future use of the site must be submitted
  • Sample results below default target levels? If above, ecological receptor, then the checklist should be completed. These checklists are available as attachments to chapter five of the MRBCA guidance for petroleum storage tanks.
  • Sample results within established Tier 1 cleanup levels
  • Sample results within appropriate groundwater use column Table 4-1
  • Tank(s) “Closed-In-Place”? If so, a Statement of Closure may be used to record the existence of the tank(s) on the property

Closure Contact Information

Closure Main Phone Line: 573-751-6822

References and Forms

Missouri Risk-Based Corrective Action for Petroleum Storage Tank Sites - Sampling for Polynuclear Aromatic Hydrocarbons - PUB2160 (PAH analysis)

Soil Type Determination Guidelines

For More Information

Missouri Department of Natural Resources
Environmental Remediation Program
Tanks Section
PO Box 176
Jefferson City, MO 65102-0176
800-361-4827 or 573-751-6822
573-526-8922 fax

Nothing in this document may be used to implement any enforcement action or levy any penalty unless promulgated by rule under chapter 536 or authorized by statute.

For more information