UST Regulations
Approximately 7,000 new UST releases are still discovered each year, mainly because of poor operation and maintenance. Although releases from tanks are less frequent, releases from piping, spills and overfills associated with deliveries are a common problem, especially at the dispenser. EPA says data show that release detection equipment only detects about half the releases they are designed to detect.
Revisions to the regulations were adopted by Massachusetts in February 2012. Claiming sensitivity to the future costs of operating USTs, EPA minimized requirements for retrofitting existing UST systems while focusing on proper operation and maintenance of equipment. However, new UST systems will be subject to additional release prevention requirements.
UST Operator Training
Effective August 8, 2012 operators of underground storage tank systems must designate a Class A, B, or C, operator capable of and knowledgeable about the tanks, piping, leak detection and alarms, spill prevention, emergency procedures, registration, and reporting (310 CMR 80.02). Training and certification requirements are also outlined.
Secondary Containment
EPA proposes that owners and operators install secondary containment (including interstitial monitoring) for new or replacement tanks and piping installed after the effective date of the final UST regulation. However, EPA is not proposing secondary containment for suction piping nor piping associated with field-constructed tanks or airport hydrant fuel distribution systems.
Under the proposal, secondarily contained tanks and piping must meet certain performance standards and be monitored for a leak at least once every 30 days using interstitial monitoring. In addition, pressurized piping must have an automatic line leak detector.
Under-Dispenser Containment
The proposal requires under-dispenser containment (UDC) beneath new dispenser to prevent dispenser system leaks from reaching soil or groundwater. A dispenser system is considered "new" when both the dispenser system and equipment needed to connect the dispenser system to the UST system (e.g., check valves, shear valves, unburied risers or flexible connectors, or other transitional components beneath the dispenser that connect it to underground piping) are installed. UDC must be liquid tight and allow for visual inspection and access to the components in the containment system, or must be continuously monitored for leaks from the dispenser system.
Operation and Maintenance
EPA proposes documented, monthly walkthrough inspections to verify that UST system components, including the following, are being properly operated and maintained: spill prevention equipment; sumps and dispenser cabinets; monitoring/observation wells; cathodic protection; and release detection. Walkthrough inspections must follow an inspection protocol detailed in the proposed regulation; a comparable standard code of practice developed by a nationally recognized association or independent testing laboratory; or a comparable inspection protocol developed by the implementing agency. EPA proposes that written inspection records be maintained for one year.
There are also testing requirements and inclusion of emergency power generators that use USTs for their fuel to operate.If you have questions, please call GEC at 781-356-9140, extension 112.