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0 <br />The spill container drain valve shall be configured to drain liquid directly into the drop <br />tube and shall be isolated from the underground storage tank ullage space. The leak <br />rate of the drain valve shall not exceed 0.17 CFH at 2.00 inches H2O. Depending on <br />the presence of the drop tube overfill prevention device, compliance with this <br />requirement shall be demonstrated in accordance with the latest adopted version of <br />either TP -201.1 D, Leak Rate of Drop Tube Overfill Prevention Devices and Spill <br />Container Drain Valves; or TP -201.1 C, Leak Rate of Drop Tube/Drain Valve <br />Assembly. <br />The Drop Tube Overfill Prevention Device (overfill device) is designed to restrict <br />the flow of gasoline delivered to the underground storage when liquid levels <br />exceeds a specified capacity. The overfill device is not a required component of <br />the vapor recovery system, but may be installed as an optional component. Other <br />regulatory requirements may apply. <br />2. The leak rate of the overfill device shall not exceed 0.17 CFH at 2.00 inches H2O <br />when tested as in accordance with the latest adopted version of TP -201.1 D, Leak <br />Rate of Drop Tube Overfill Prevention Devices and Spill Container Drain <br />Valves. <br />The Face Seal Adaptor shall provide a machined surface on which a gasket can seal <br />and ensures that the seal is not compromised by an improperly cut or improperly <br />finished riser. A Face Seal Adaptor shall be installed on the following required <br />connections. As an option, the adaptor may be installed on other connections. <br />a. Product Spill Container (required) <br />b. Tank Gauging Components (required) <br />c. Vapor Recovery Spill Container (optional) <br />d. Rotatable Adaptors (optional) <br />Ball Float Vent Valve <br />A Ball Float Vent Valve (ball float) is designed to restrict the flow of a gasoline delivery <br />by using back pressure when the storage tank levels exceed a specified level. If <br />installed for overfill prevention, a ball float must be installed at each vapor and vent <br />connection to the tank. Ball floats are not required components of the vapor recovery <br />system, but may be installed as optional components for vapor recovery. Other <br />requirements may apply. <br />Executive Order VR -102-E, OPW Phase I Vapor Recovery System, Exhibit 2, Page 3 <br />