5. EPA Corrosion Study

6. Highlights from Study
Visually inspecting fuel filters and inside UST system access points for symptoms of corrosion.
Repairing or replacing equipment as necessary to ensure proper functionality if tank owners or the servicing company finds corrosion.

7. Highlights cont.
Contacting “UST service companies to further evaluate the extent of corrosion inside tanks. These companies can remove and check equipment for evidence of corrosion; they may also sometimes use a specially designed video camera to conduct a thorough inspection inside an UST system. If observations show corrosion, the company might remove more equipment and check to ensure all equipment is functioning properly. The company might suggest additional testing for the functionality of overfill protection equipment, leak detection equipment and automatic tank gauges. Testing the integrity of both single-walled and double-walled tanks for absolute tightness may also be warranted.”

8. Also Referenced in PEI’s Tulsa Letter
July 26, 2016 | Vol. 66, No. 14
EPA’s research showed that 83 percent—35 of 42—of the USTs they studied exhibited moderate or severe corrosion, but less than 25 percent of owners were aware of corrosion prior to EPA’s research inspections, according to Carolyn Hoskinson, director of EPA’s Office of Underground Storage Tanks (OUST). The study concluded that corrosion inside UST systems “could result in an increased chance of releases of fuel to the environment and subsequent groundwater contamination.”