Flood Risks Are Rising—Is Your UST System Ready?
The Hidden Dangers of Flooded UST Systems
When floodwaters rise, underground tanks face significant threats. Even a securely installed UST system can become buoyant if the surrounding water table rises, potentially causing tanks to shift, crack, or leak.
Floodwater impacts include:
Tank buoyancy – Water can push tanks upward, even out of the ground
Soil erosion – Undermines tank and piping stability
Contamination – Polluted floodwaters can enter tanks and degrade fuel quality
Equipment damage – Water can destroy dispensers, sensors, and electrical systems
These conditions not only endanger your site’s operation but can result in costly environmental contamination and compliance violations.
EPA Guidance: What to Do Before the Flood
The U.S. Environmental Protection Agency (EPA) offers critical steps to reduce the risk of UST system damage before a flood occurs:
✅ BEFORE THE FLOOD:
Conduct a site-wide inspection for flood-prone areas
Record product and water levels in all USTs
Fill tanks to reduce buoyancy
Shut off power to dispensers and submersible turbine pumps
Ensure fill caps and spill bucket plungers are tightly sealed
Close shear valves on pressurized piping
Temporarily cap vent pipes
Place sandbags over sump lids and spill buckets
These simple actions can help prevent structural failure and reduce cleanup costs.
Returning to Service: What to Check After the Flood
Once the water recedes and it’s safe to return, a thorough inspection is essential:
🔧 AFTER THE FLOOD:
Keep power OFF during your initial inspection
Check for tank movement or concrete pad damage
Inspect sumps, tanks, and spill buckets for water and debris
Measure fuel and water levels
Examine the electrical system and leak detection devices
Test all fittings, valves, and vent lines for integrity
Perform a system tightness test before adding fuel
Clean and empty all secondary containment areas
Repair or replace any damaged equipment
If applicable, test your cathodic protection system
Note: Many states require a certified UST inspector to approve the system before it is brought back online.
How PASS Supports Flood Preparedness & Recovery
PASS Training & Compliance helps facility owners and service providers stay one step ahead of natural disasters with compliance management, training, and digital tools that make flood planning easier:
PASS Opus provides state-approved UST operator training, including emergency response and preparedness
Harmonics gives real-time insight into testing results, inspection schedules, and compliance tasks across your UST portfolio
Symphonics empowers service providers to manage recovery checklists, documentation, and regulatory workflows in one intuitive system
Want More Guidance?
The U.S. Environmental Protection Agency has published a detailed resource to help UST owners prepare for and recover from flooding events. The Underground Storage Tank Flood Guide (EPA-510-B-20-001) includes practical checklists, response actions, and best practices for minimizing risk during severe weather.
Don’t Wait for the Storm
Flood events are no longer isolated. From the coasts to the heartland, UST operators are facing a new climate reality—and the best way to manage the risk is through preparation.
Let PASS help you build a flood mitigation plan that keeps your fueling site secure, compliant, and operational. Because your customers depend on you to keep their vehicles—and their communities—moving forward.
Come hail or high water.
Need help preparing your site or team for flood season? Contact us at passtesting.com to learn how PASS can support your compliance journey.
