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Appendix A: Vac Sensor Test Values Record <br /> The leak rate for each interstice will affect the'Time to No Vac',which is the time it would take for the vacuum to be <br /> lost if the STP did not turn on to replenish it. However,the smaller the volume,the greater the impact of a small <br /> leak on the 'Time to No Vac'.A general guideline is to eliminate any leaks so that the'Time to No Vac' reads 100 <br /> hours,which is the maximum displayed value. <br /> Use the chart below to record Vac Sensor system test values. <br /> TANK VAC SENSOR LEAK RATE TIME TO NO VAC <br /> (gph) (hr) <br /> Product Line <br /> Vapor Return Line <br /> Tank or Tank Vent <br /> sum <br /> Product Line <br /> Vapor Return Line <br /> Tank or Tank Vent <br /> Sum <br /> Product Line <br /> Vapor Return Line <br /> Tank or Tank Vent <br /> Sum <br /> Product Line <br /> Vapor Return Line <br /> Tank or Tank Vent <br /> Sum <br /> Product Line <br /> Vapor Return Line <br /> Tank or Tank Vent <br /> Sump <br /> A-1 <br />