What are the leak detection requirements for piping?
• Pressurized piping needs automatic line leak detectors (these can be automatic flow restrictors, automatic flow shutoffs or continuous alarm systems). Pressurized piping also needs one of the following: groundwater monitoring, vapor monitoring, secondary containment and interstitial monitoring, statistical inventory reconciliation or an annual tightness test of the piping. • Suction piping needs no leak detection if it meets two design requirements: 1) piping slopes so that the product drains back into the tank when suction is released, and 2) piping has only one check valve located closely beneath the pump in the dispensing unit. Suction piping not meeting these design requirements must use one of the following: tightness test of the piping every 3 years, groundwater or vapor monitoring, secondary containment and interstitial monitoring or statistical inventory reconciliation. Q: What are the upgrade requirements to prevent releases from USTs installed prior to the implementation of
