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9.2 The minimum time required to pressure the system ullage from zero (0) to <br /> two (2.0) inches H2O gauge pressure shall be calculated as follows: <br /> V <br /> [Equation9-2]t' [1522]F <br /> Where: <br /> t1 = The minimum time to pressurize the ullage to two inches H2O, <br /> minutes <br /> V = The total ullage affected by the test, gallons <br /> F = The nitrogen flowrate into the system, CFM <br /> 1522 = The conversion factor for pressure and gallons <br /> 9.3 If the policy of the local district requires an allowable tolerance for testing <br /> error, the minimum allowable five-minute final pressure, including testing <br /> error, shall be calculated as follows: <br /> Pf-F =2—[l+(100)][408.9—(P, +406.9) [Equation 9-31 <br /> Where: <br /> P,{ = The minimum allowable five-minute final pressure including <br /> allowable testing error, inches H2O <br /> E = The allowable testing error, percent <br /> P, = The minimum allowable five-minute final pressure calculated in <br /> Equations 9-1 or 9-2, inches H2O <br /> 2 = The initial starting pressure, inches H2O <br /> 408.9 = Atmospheric pressure plus the initial starting pressure, inches <br /> H2O <br /> 406.9 = Atmospheric pressure, inches H2O <br /> 10. Reporting <br /> 10.1 The calculated ullage and system pressures for each five-minute vapor <br /> recovery system test shall be reported as shown in Form 3-1. Be sure to <br /> include the Phase I system type (two-point or coaxial), the Phase II system <br /> type, whether the system is manifolded, and the one-minute pressures <br /> during the test. <br /> 1 <br /> G-70-164 Exhibit 3-9 <br />