Are spill and overfill protection required for the installation of new UST systems?
Yes, both spill and overfill protection are required for the proper installation of new UST systems unless approval is granted by the department. The spill prevention equipment must prevent the release of product to the environment when the transfer hose is detached from the fill pipe (i.e. spill catchment basin). In order to meet the minimum requirements that are stipulated in the regulations, overfill protection equipment must meet at least one of the following requirements: automatically shut off flow into the tank when the tank is no more than 95% full; alert the transfer operator when the tank is no more than 90% full by restricting flow into the tank or triggering a high level alarm; restricting the flow 30 minutes prior to overfilling, or alert he operator with a high-level alarm one minute before overfilling, or automatically shut off flow into the tank. Typical overfill devices include overfill prevention valves that are installed in the drop tubes (often called butterfly or f
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