FAQs

What testing do I need to have done?
  • The UST monitoring system and spill buckets must be tested annually
  • For UST systems that are not programmed for positive shutdown and fail-safe, an annual pipeline integrity test is required
  • For tanks installed prior to July 1, 2003, secondary containment testing (SB 989) is required every 36 months
  • Underground tanks with single-walled components or unique circumstances may require additional testing. Please contact your inspector for guidance

Underground Storage Tank System Testing Intervals

UST System Testing

Required Testing Interval

Annually Every 3 Years After Modifications If Applicable
Monitor System Certification

X

 

X

 

Leak Detector

X

 

X

 

Spill Bucket

X

 

X

 

Secondary Containment1

 

X

X

 

Tank Integrity

 

 

 

X2

Pipeline Integrity

X3

 

 

 

1Not required on VPH systems.
2Only required for single-walled tanks. Interval depends on monitoring plan.
3For single-walled piping or systems not programmed for positive shutdown and fail safe.

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