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Recommended Practices for the Testing and Verification of Spill,Overfill,Leak Detection and Secondary Containment Equipment at UST Facilities Verify that the system setup parameters are correct (e.g., pipe diameter, pipe length, pipe material of construction, etc.). If any of the setup parameters are not correct, make any necessary changes to ELLD bring the system settings within specifications. 9.2.6 ELLD Test Procedure. NOTE This procedure describes calibration of the test apparatus leak orifice without the use of a pressure regulator. If you prefer to calibrate the leak orifice with the use of a pressure regulator, refer to the procedure 1, described in Section 9.1.6. FlGURE 9-2.The ELLD mounted In the submersible I.Shut off power to pump and perform lockout/ turbine pump will alarm on the console when a leak is tagout procedures on the circuit breakers. detected 2.Bleed line pressure to zero by activating the dis- penser and opening the nozzle,allowing fuel to drain into the test can.After all line pressure has measure STP pressure and an adjustable orifice to simulate a leak rate equivalent to 3 gph at 10 been bled off, hang up the nozzle and close the shear valve. psig; • time-measurement device capable of measuring 3.Connect.the test apparatus to the shear valve test port at the highest dispenser. If there is no a 1-second increment; elevation change, connect the test apparatus at • graduated cylinder for measuring leak rate; the farthest dispenser. , • 5-gallon metal test can. NOTE: If the piping has master/satellite dis- 9.2.5 Preparation. pensers,the test apparatus must be connected to the farthest satellite dispenser. NOTE:At locations with master/satellite fuel dispensing installations, the satellite may 4.Reestablish power to the pump. Open the shear not be protected by the ELLD. At locations valve and pressurize the line by activating the with a master/satellite fueling location, the pump. Confirm that no leaks are present in the test should be performed at the most distant test apparatus or the connection to the shear satellite dispenser so the entire piping system valve test port. is included. 5.Dispense product from the dispenser nozzle into the test can to remove all air from the line. NOTE ELLDs will turn the STP on and off 6.Close the dispenser nozzle and allow the line to multiple times while testing the simulated fully pressurize. Confirm that the line pressure leak. Ensure the test can will not overflow observed is the full pump pressure. during the test time. 7.Referencing the full pump pressure observed in Conduct the test at the dispenser that has the high- Step 6,determine from Table 9-1 the volume of est elevation in the system.If there is no difference fluid that must be discharged in 60 seconds at in elevation between dispensers, conduct the test full pump pressure to simulate a leak equivalent using the dispenser farthest from the STP. to 3 gph at 10 psig. Remove from service all dispensers connected to S.With the pump running and the line at full pump the STP being tested. pressure, slowly open the test apparatus leak orifice and adjust until the flow rate determined Verify that the STP relays are operating properly to in Table 9-1 has been achieved. ensure that the pump cycles on and off correctly. pei.org