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PEI/RP1200-17 ELECTRONICS. MONITOkING INSPECTIONSYSTEM AND TESTING .1 General. Electronic underground storage tank (UST) monitoring systems provide a warning or alarm when a leak in the UST system occurs. The monitoring system and sensors need to be programmed to reflect the conditions for each individual site to ensure proper operation. For the remainder of this section, the term "ATG" shall be used to refer to all electronic UST monitoring systems whether they have an automatic tank gauge probe or are solely an electronic alarm for sensors installed. "ATG" is a general industry term that is used to identify all electronic tank monitoring equipment. Before starting any testing, print out the system configu- ration on the ATG console (if equipped with a printer) and verify that site setup parameters are correct. Make sure that the sensors are correctly labeled to indicate their location. Keep completed compliance tests on file to confirm that during the test: • the system was continuously powered and monitored for the data collection period; • tank probes and leak sensors were functioning properly. FIGURE 84. The indicator lights and the LCD display on the monitoring console show the status of the UST system. .2 ATG Probes. ATG probes continuously measure the product level in a UST using an in -tank probe con- nected to a console. To properly evaluate its condition, the probe needs to be removed from the tank and visually inspected. r241M, 11 ATGs monitor the product level in storage tanks and can be programmed to perform compliance tests that include 0.2 gph static and dynamic ("continuous") leak tests, and 0.1 gph ("precision") tests. 8.2.1 ATG Functionality Test. 8.2.1.1 General. The ATG must be pro- grammed using site-specific parameters for the UST system to ensure proper opera- tion. Tester should confirm the required setup and testing parameters with the owner/operator. On dual float systems, the second float indicates the level of water in the tank. 8.2.1.2 Purpose. The purpose of this test is to: • determine whether the ATG shows the correct product level on the console; • determine whether the ATG shows the correct water level on the console; • verify that the water alarm is operating correctly and provides a warning at the programmed set point. WARNING: Water ingress Into tanks con- taining ethanol -blended gasoline may not be detected using water floats designed for non -ethanol -blended gasoline. 8.2.1.3 Description of Test. The pro- cedures in this test are for a probe, properly installed per manufacturer's instructions, equipped with floats having a range inside the tank that extends from the bottom to the top of the tank. The ATG probe is removed from the tank. The product float and water float positions are compared with the console readout. 8.2.1.4 Preparation. Use this test pro- cedure in conjunction with the monitor- ing system manufacturer's installation and maintenance instructions. Refer to the tank manufacturer's tank chart for the capacity in gallons, the diam- eter and the volume of product that corre- sponds to the product level.