Aboveground Storage Tanks

For Closure of Aboveground Storage Tanks (ASTs), Curren follows American Petroleum Institute (API) standards, to ensure safe and proper tank decommissioning. To ensure a safe working environment, all Curren personnel performing tank removal activities are 40 hour OSHA and Confined Space Entry trained. Our multi step process consists of the following:

1. Submit and obtain local permits for the removal of the AST.


2. Schedule the work approximately one week in advance to allow our client proper notice of the work activities.



3. Arrive on site on the day specified and complete a tailgate safety meeting discussing safety concerns of the project.



4. We then inspect the tank for liquid. Any pumpable liquids found in the tank will be removed.



5. After liquid removal, Curren personnel will monitor the atmosphere of the tank for potentially dangerousconditions such as high flammable vapor levels and low oxygen content. If no flammable vapors are present and the tank contains sufficient oxygen, the tank will be cut open as per American Petroleum Institute (API) Publication 2015, "Cleaning Petroleum Storage Tanks,". Following API standards ensures that the tank is thoroughly cleaned of any residual liquid, which is required by local and state regulations. Tank cleaning will consist of wiping, squeegeeing, and removing all liquids and sludges from the tank. All liquids and sludges generated as a result of the tank cleaning process will be transported from the site to a licensed oil recycling facility.



6. After the tank has been cleaned, the tank will be cut into sections and removed. The fill and vent pipes will be cut and capped on both the interior and exterior of the wall, if they penetrate any walls. This is performed to ensure that no product piping is left in place. The copper supply and return lines that feed the heater will be evacuated with a vacuum and the empty lines will then be crimped on both ends and left in place.



7. As per the local permit obtained, at this time the local construction/fire official will perform an inspection of the oil tank removal. After inspection, the tank will be removed from the site.
   
   
   
8. After completion, Curren will draft a report documenting the tank closure activities and include copies of the local permit and inspection, scrap receipt and liquid manifest with the report to certify the closure was performed.



9. After completion, Curren will draft a report documenting the tank closure activities and include copies of the local permit and inspection, scrap receipt and liquid manifest with the report to certify the closure was performed.