InfrastructureIntelligence
Replace the tanks that need it.
Keep the ones that don't.
STS reads the structural condition of underground tanks while they stay full and in service, so replacement decisions are based on the tank itself, not the calendar.
guided wave · MsT / GWT
full wall
resolved end to end
Read the whole wall
from a single probe.
from a single probe
Record, per tank, for life
nationwide, EPA-tracked
peer-reviewed validation
Age tells you how old a tank is. It doesn't tell you if it's failing.
Once a tank is buried, its condition is invisible. That leaves operators guessing in two directions at once, and both guesses are expensive.
/Capital spent on a site that had years left.
/Disruption for no reason.
/Budget consumed that a failing site needed.
/Release and remediation.
/Downtime and regulatory exposure.
/A brand story you do not control.
Both mistakes come from the same gap. Once a tank is buried, condition is invisible, so age becomes the only variable anyone can act on.
No product drop. No dispensers down. No lost sales days.
Every other way to learn something about the tank wall starts by emptying and cleaning the tank and closing the site.
Testing that runs while you stay open only tells you whether a tank is leaking today, not whether it is going to fail.
STS gives you structural condition with the site fully operating.
One probe, through the drop tube, reading the whole wall.
Magnetostrictive guided wave (MsT / GWT) sends a torsional wave along the tank wall from a single probe lowered through the existing 4-inch drop tube. The wave travels the full structure and returns a signal that maps wall condition, end to end, with the tank full and in service.
Every read becomes a Structural Condition Record.
A dated, data-backed record of condition that follows the tank for the rest of its life. It informs the next replace-or-keep decision, it travels to a buyer or lender at site transfer, and it gives an agency a defensible basis for condition.
Across thousands of tanks, those records compound into the category's structural dataset: a reference for what condition actually looks like underground, by tank type, age, and region.
Every tank comes back with one of three answers.
The wall has lost enough section that the tank should come out. The work gets scheduled with evidence behind it.
Condition is acceptable today, with change worth tracking. Read again on a set interval and watch the trend.
The wall is sound. The tank stays in service and the capital goes where a tank actually needs it.
Each answer is recorded in the Structural Condition Record, so the reasoning stays with the tank and not in someone's memory.
Operators
C-store chains and fleets carrying hundreds of tanks. A read tells you which tanks are sound and which are failing, so replacement capital lands on the sites that need it and the network keeps trading.
Manufacturers
Field condition data on how their tanks age in the ground, by type and region.
Agencies & programs
Regulators gain a defensible, condition-based basis rather than age alone.
Buyers & lenders at site transfer
A Structural Condition Record turns an unknown buried asset into a documented one, de-risking diligence when a site changes hands.
The method was developed and validated at SwRI, with peer-reviewed results on steel.
STS holds a seat on the ASTM committee shaping how this method is standardized.
Active underground fuel tanks in service nationwide, tracked by the EPA.
Get in touch.
Questions about the method, the validation work, or a tank you are deciding on. One site is enough to start, and a read returns a Structural Condition Record that follows the tank for life.