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Home >> Ust >% Leak Prevention >1, Lg113 = Vendors UST Programs - LG 113 Issue Date:September 1,2004 Veeder-Root Secondary Containment Leak Detection (SCLD) TLS-350/ProMax/EMC Console with Vacuum Sensors 857280-100, 200, 30x, or Assembly 332175-001 PRESSURE/VACUUM INTERSTITIAL MONITOR Certification Certified as equivalent to European leak detection standard EN-13160-2 Part 2, as a Class I leak detection system. Operating System uses vacuum generated by the turbine pump to continuously maintain a partial vacuum Principle within the interstitial space of double-walled tanks, double-walled piping, and double-walled containment sumps. System is designed to activate a visual and acoustic alarm, and optional turbine pump shutdown before stored product can escape to the environment. System is capable of detecting breaches in both the inner and outer walls of double-walled tanks, double-walled piping, and double-walled containment sumps. Alarm System alarms when a liquid or air leak occurs which causes the interstitial vacuum to decrease Condition (pressure to increase) and the system is unable to maintain minimum vacuum. System will also alarm if liquid is detected in the interstitial space, or if the vacuum level in the interstitial space decreases at a rate exceeding 85±15 liters/hour. Applicability Underground double-walled tank, connected double-walled piping, and other connected interstitial spaces storing gasoline, gasohol, diesel, heating oil #2, kerosene, aviation fuel, motor oil, water. Manufacturer's Alarm will activate when interstitial vacuum decreases to 1.7 psi vacuum (3.5"Hg). Specifications Default maximum vacuum level (pump-off pressure) is 8 psi vacuum (16.3" Hg), but can be set as low as 4 psi (8.2" Hg) if the monitored system requires that a lower level of vacuum be maintained. The interstitial space shall be rated for the operating vacuum of the leak detector, regardless of temperature and groundwater level fluctuations. Volume of monitored interstitial space must not exceed 8 m3 for tanks and 10 m3 for piping. When monitoring double-walled tanks, a fuel appropriate liquid sensor must be located at lowest point of interstitial space. Calibration Functional and operational safety tests should be performed in accordance with manufacturer's instructions.. Comments Interstitial space is tested continuously. System is connected to the interstitial space by a single vacuum line. Vacuum is generated by the turbine pump, and is measured and controlled by a vacuum sensor.