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PEI/RP1200-12 3.Check the ball for holes and cracks. It should 7.3.2 Purpose. The purpose of this inspection move freely in the cage. Replace any missing or is to verify that the overfill alarm is operating cor- defective parts. rectly and is set to provide a warning when the tank 4. Check the vent orifice in the vent-restriction is no more than 90 percent full. pipe.It must be open and located near the top of 7.3.3 Description of Test. The procedures in the tank. this test are for overfill alarms that are an integral 5.Use the ball float valve manufacturer's suggest- part of a typical ATG that uses magnetostrictive ed inspection procedure to determine if vapor probes for fuel level measurements in the UST. flow will be restricted when the tank is no more The ATG probe is removed from the tank. When than 90 percent full.Make any adjustments nec- the product float is moved to the position cor- essary to ensure that flow will be restricted when the tank is no more than 90 percent full, responding to the 90 percent fill level, the alarm should activate. 6.After inspection of the ball float valve assembly, reinstall it following the manufacturer's installa- tion instructions. conjunction with the monitoring system manufac- turer's installation and maintenance instructions. 7.2.7 Pass/Fail Criteria. The ball float valve passes the inspection if the ball float valve func- Refer to the tank manufacturer's tank chart for the tions as designed, flow restriction occurs when the capacity in gallons,the diameter and the volume of tank is no more than 90 percent full, and the tank- product that corresponds to the product level. top fittings are vapor-tight. When possible,print out the system setup to verify If any of the following configurations exist, the the proper configuration of the ATG. overfill prevention system fails the inspection: 7.3.5 Test Equipment. Test equipment shall • ball float valves installed in storage systems that include: cure equipped with suction pumps and air elimi- • tools for the removal of the ATG probe; nators; • ball float valves installed with coaxial Stage I • tape measure or gauge stick. vapor recovery; 7.3.6 Test Procedure. • ball float valves used on tanks equipped with 1.Measure the product level in the tank and com- remote-fill pipes and gauge openings without pare to the console reading to confirm ATG the use of"trap door" devices; or accuracy. If the reading does not agree, contact • ball float valves installed in storage systems that the appropriate person. also are equipped with automatic shutoff devices 2.Verify that the overfill alarm on the ATG is set to and the ball float valve is set to restrict flow provide a warning when the tank is no more than before the tank is 95 percent full. 90 percent full. Consult the tank chart for the If the ball float valve does not function as designed, inch-level setting for 90 percent tank volume. flow restriction does not occur until the tank is more 3.Verify on the ATG console that the overfill alarm than 90 percent full, or the tank-top fittings are not circuit is operational. vapor-tight, the ball float valve fails the inspection. 4.Activate the overfill alarm warning to verify its 7.3 Overfill Alarms. operation. If found defective,contact the appro- priate person. 7.3.1. General. Overfill alarms provide an audi- 5.Remove the ATG probe cap and disconnect the ble and/or visible warning to the fuel delivery cable from the ATG. driver if the product level in the UST reaches the 90 percent level during a delivery. They are often 6.Remove the ATG probe from the tank. Use an integral part of the ATG system. An overfill care to ensure that the product float on the stem alarm does not stop or restrict product flow. does not catch on theAcrctTVE removal. pei.org r�l'dK 4 �1- PE[Wrrr5EFZ ACES