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Recommended Practices for the Testing and Verification of Spill,Overfill,Leak Detection and Secondary Containment Equipment at LIST Facilities Verify that the console has no active or recurring history of leak detection-related wamings or alarms. In the event of any such warnings or alarms, notify the appro- priate person before continuing the test. Where possible print out the system setup and any alarm histories from the console. Save the printout for facility records or make an electronic copy. 8.2.1.5 Test Equipment. Test equip- ment shall include: • tools for the removal of the ATG probe and sensors; • tape measure or gauge stick; • water-finding paste. 8.2.1.6 Test Procedure. 1. Measure the product and water level in the tank and compare to the console readings to confirm ATG accuracy. If the readings do not agree,contact the FIGURE 8-2. When removing and replacing the ATG appropriate person. probe, be careful to avoid damaging any of the compo- 2. Remove the ATG probe cap and nents. disconnect the cable from the ATG. 9. Clear the alarm conditions. 3. Remove the ATG probe from the tank. Use care to ensure that the floats on 10. For the water float, slowly move the the stem do not catch on the bottom float up the probe until the water alarm is triggered. of the riser during removal. 4. Inspect the probe. The floats must 11. Measure the distance from the bottom move freely on the stem without of the probe to the water float when binding. If any parts are damaged the float first triggers the water alarm. or missing, contact the appropriate 12. Compare the measurements for prod- person. uct float and the water float in Steps 8 5. Reconnect the probe cable. and 11 to the values programmed into the console. 6. Set the fuel float in the middle of the probe and verify that it is showing the 8.2.1.7 Pass/Fail Criteria. If the mea- correct inch reading on the console. surements for the product and water floats match the values programmed in the con- 7. Slowly move the fuel float up the sole and the console acknowledges the probe until Lhe high product alarm is high product and water level alarms, the triggered on the console.If the system ATG probe passes the test. does not alarm at the pre-set level, contact the appropriate person. If the measurements for the product and S. Measure the distance from the bottom water floats do not match the values pro- of the probe to the fuel float when the grammed in the console or the console float first triggers the high product does not acknowledge the high product alarm. or water level alarms, the ATG probe fails the test. pei.org