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