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9 0 <br /> 4- <br /> 7, The TLS console controlling the vapor Polisher shall have an RS232 Port which shall be <br /> installed in a 10cation that allows the RS232 Port to be easily accessible, and if applicable <br /> Per district requireaTen <br /> available to electronically I tsdownload reports., for use at anytime. A vacant RS232 serial Port shall always be <br /> 8. Security seal tags Must be installed on the vapor Polisher. If for any reason the seal tags <br /> are damaged Or missing, the <br /> conducted and pass district May require that Exhibit I I and Exhibit 12 be <br /> prior to installing new security seal tags, <br /> —Pressure/�Vacuu�mVent <br /> 1- Except for the P/V vent valve referenced in item 3 of this section, all P/V vent valves shall <br /> be an ARB certified P/V valve for a Phase I system. <br /> 2. At least one Pressure/vacuum <br /> maximum number of P (P/V) vent valve shall be installed on each tank vent. The <br /> Al vent valves allowed and P/V vent valve Performance <br /> specifications are listed in the applicable Phase I EVR Executive Order. Vent lines may be <br /> manifold to minimize the number Of P/V vent valves and Potential leak sources Provided <br /> the manifold conforms to all applicable fire regulations <br /> vapor inlet and vapor outlet to the VST ECS Membran- However, the vents connecting the <br /> together. e Processor cannot be manifold <br /> 3. The P/V valve installed on the VST ECS <br /> Phase I system and no testing is requiredembrane Processor vent is not part Of the <br /> P, <br /> Vapor Return and Vent Lines <br /> For facilities installed on or after April 1, 2003, all vapor return and vent lines shall be a <br /> the first manifold. All lines after the first manifold and back to the underground storage <br /> tank shall have a minimum nominal internal <br /> minimum nominal internal diameter of 2 inches from the dispensers or the vent stacksto <br /> diameter of 3 inches. <br /> Note., Facilities Permitted by a local district prior to April 1, 2003 shall <br /> required to meet the three inch diameter standard only upon facbeility <br /> modification which involves the addition, replacement, <br /> percent or more of the buried Vapor piping. or removal of 50 <br /> 2. All vapor return lines shall have a minimum slope Of 118 inch per foot from he dispenser <br /> riser to the riser of the UST. A slope of 114 t <br /> wherever feasible. inch or more Per fool is recommended <br /> VST Phase 11 EVR system, Exhibit 2-VR-203-E <br />