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L�= <br />A series of leak detection tests were conducted using the API/Ronan Automatic <br />Tank Gauging System to establish tho performance capabty Of the system when <br />applied to mandbided systems. Two manftlded 5,000 gallon tanks containing <br />unleaded gasoline were used for the test. <br />The system evaluated was an API/Ronan X76ETM unit equipped with software <br />version APiGD2. This particular software was developed specifically for use on <br />rffv-nifolded tanks. <br />The level measurement is based on magnetostrictlive technology and the <br />temperature sensor. is an FjTD device, The data is collected by a microprocessor that <br />is housed in a central console unit. The X76ErM system is capable of monitoring <br />multiple tanks and produces inventory data such as deliveries, theft alarms, low level <br />alarms, and other routine features. The system can be programmed to conduct leak <br />testing at preset times. <br />The test sites used were two maior Oil company servicO stations located in <br />Calitbirrila. Fourteen sets of test data were collected from one site and one from a <br />Mifferent site. The X76ETM systems had been previously installed as a part of the <br />routing monitoring program for the stations. Each unit was equipped with a printer <br />and the results were taken directly from the printout. <br />Ail of the tanks hadnominal capacity of 51 oo gallons and were constructed o <br />af <br />steel. Two tanks were connected for each manifolded system so that the total <br />capacity tested was lo,200 gallons. A single probe was installed in each tank and the <br />level and temperature data combined in the console to provide a single leak rate. <br />IFiis is the normal configuration for the API/Ronan system. <br />Test data was obtained from the printojAs from each siteAll of the tanks were <br />assumed to be tight, an assumption that seems consistent with the measured leak <br />rates. Leak simulations were conducted during two of the tests (0 7 and # 8) on June <br />1, 1993 by introducing a nominal leak of 0.2 gallhr into the tank. The leak was <br />created using a peristaltic pump to remove a measured amount of product over a set <br />time period. <br />LOOISOO `i i o rriaHs OC19SL90TS XVd 01:ST WV/60 <br />