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0 <br /> PLC-5000 Site Controller, LD-2000 and LD-2000 PLC <br /> Because the system was evaluated as a pass/fail device, the calculation of the <br /> Probability of Detection (PD) and the Probability of False Alarm (PFA) was based on the <br /> number of correct test results. The pDand PFAwerecalculated by dividing the number <br /> of correct results by the total number of tests that were conducted. Tests conducted <br /> with trapped vapor in the line were not used in the pDand PFAcalculationsas specified <br /> by the EPA protocol. <br /> Performance for Hourly Testing <br /> A total of 19 Hourly tests were conducted which consisted of 10 tests on the rigid <br /> pipeline and 9 tests on the flexible pipeline. There were no missed detections or false <br /> alarms observed for these 19 tests. When a leak was present in the line, test times <br /> ranged from 1 to 8 minutes. When a leak was not present in the line, test times were <br /> less than one minute. Based on the results of the Hourly tests, the the 98 LD-2000 and <br /> the 98 LD-2000 PLC are capable of performing at the level of previously certified <br /> versions of the LD-2000.7 <br /> Performance for Monthly Monitoring/Annual Line Tightness Testing <br /> A total of 62 tests without vapor in the line were conducted for the Annual Line <br /> Tightness Testing mode which consisted of 56 tests on the rigid pipeline and 6 tests on <br /> the flexible pipeline. There were no missed detections or false alarms observed for the <br /> 62 tests. The pDof a 0.1 gal/hr leak was calculated to be 100% and the PFAontight line <br /> was calculated to be 0%. When a leak was present in the line, test times ranged from <br /> 1.8 hours to 10.9 hours and averaged 5.3 hours. When a leak was not present in the <br /> line, test times ranged from 3.5 hours to 9.2 hours and averaged 6 hours. <br /> Performance with Trapped Vapor in the Line <br /> Three additional Monthly/Annual tests were conducted with a 110 ml trapped vapor <br /> pocket present in the line. No missed detections or false alarms occurred for any of the <br /> trapped vapor tests. <br /> Maximum Line Size <br /> The EPA allows for line leak detectors to be used on lines up to twice the size that they <br /> were evaluated on. The Vaporless system was evaluated on a rigid fiberglass pipeline <br /> that was 200 feet in length by 3.25 inches in diameter with a volume of 86 gallons. <br /> Therefore, this system can be used on rigid pipelines up to 400 feet in length by 3.25 <br /> inches in diameter or 172 gallons in volume. <br /> 7 Three previous evaluations were conducted on versions of the LD-2000 for Hourly Testing. <br /> Evaluation reports written by KWA, Inc. for the following models of the LD-2000 are available from <br /> Vaporless Manufacturing: LD-2000 and LD-2000S, 11/19/90; LD-2000E and LD-2000E-S, 12/11/92; LD- <br /> 2000T and LD-2000T-S, 7/13/93. <br /> Page 18 <br />