Underground Storage Tank (UST)

An underground storage tank (UST) is defined by law as “any one or combination of tanks, including pipes connected thereto, that is used for the storage of hazardous substances and that is substantially or totally beneath the surface of the ground” (certain exceptions apply).

The purpose of the UST Program is to protect public health and safety and the environment from releases of petroleum and other hazardous substances from tanks.

All facilities with an UST are required to have a permit to operate. Permits are also required for closure (both temporary and permanent), modification, and new construction. An operating facility needs to have on file (both with this Division and available on site) the following information:


UST Modification Permit Requirement Matrix

Type of Work Permitted Activity Non-Permitted Activity
 Boot Replacement X*  X
Brine System Repair  X
 Cathodic Protection  X
Dispenser Protection  X
Flex Hose Replacement (Sump/UDC)  X
Line Leak Detector  No change in the device type or design
Monitoring Console Install or Replacement (hardware)  X
Monitoring Console Programming (software)  If monitoring plan is changed – case by case Software change or reprogramming
 Overfill Alarm  X
Repair/Upgrade UST  X
Sensor Replacement (Sumps, ATGs) Change in sensor type or design No change in sensor type or design
 Spill Buckets (Direct Burial)  X
Spill Buckets (Fill Sump) X
Sump Repair  X
Turbine Repair X
UDC Replacement  X
Underground Piping  X
Vacuum System Repair  X

If the scope of work required is not listed on the Matrix, please call the Environmental Health Services Department, Hazardous Materials Program at 661-862-8740 for assistance and clarification.

*Permit required if breaking any concrete.

If a modification permit is required, please complete the Application for new Construction/Modification above. Submit to the KCEHD and allow staff 30 days to fully review the permit, scope of work, and return.