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R <br />MSA INSTRUMENTS <br />24-HOUR MONITORING FOR LEAKING UNDERGROUND STORAGE TANKS <br />1 <br />T BENJAMIN <br />E. CHURCH AVE. <br />,FRESNO, CA 93706 <br />Leaking underground <br />storage tanks have recently <br />been identified as potential <br />sources for both soil and <br />groundwater contamination. <br />Local, state and federal <br />agencies are already taking <br />action to help reduce pos- <br />sible environmental damage <br />by legislating tough new <br />guidelines regarding the <br />installation, location and <br />monitoring of underground <br />storage tanks. <br />To help facilities comply with both <br />current and proposed pollution control <br />measures, MSA is introducing the Tankgard <br />Leak Detection System. J`his low-cost, low- <br />maintenance <br />owmaintenance instrument can detect gasoline <br />and other light hydrocarbon vapors that can <br />leak from underground storage tanks. A liquid <br />sensor is also available to detect the presence <br />of liquid buildup. <br />The instrument is comprised of four <br />long -life, solid-state sensors. The vapor or <br />liquid sensors are connected to a centrally <br />located monitoring and alarm module. The <br />sensors can be located up to 500 feet from <br />the monitor. Placed in bore holes around the <br />perimeter of the tank or between the tank's <br />walls, the sensors continuously monitor for <br />vapor or liquid presence. Signals are then <br />sent back to the alarm module. <br />PAT Simple setup and opera- <br />tion. No complex pro- <br />cedures or calibration <br />equipment. <br />Background interferents <br />(such as methane) cancelled <br />during setup. <br />Long -life, solid-state <br />sensors that are not degraded <br />by high vapor concentra- <br />tions or liquid submersions. <br />115, Intrinsically safe sensors <br />for Class I, Division 1, Groups C&D, as <br />defined by the National Electrical Code. <br />UL listed. <br />Maintenance is reduced to a simple sensi- <br />tivity check. (Expose the vapor sensor to <br />hydrocarbon vapors and check its response.) <br />Relays are standard for remote alarm and <br />remote trouble. <br />Audible and visual alarms provided with <br />front panel test button. Discrete LED's inside <br />the unit provide indication of which sensor <br />has caused the alarm or trouble. <br />Built-in time delay to prevent false al�irms. <br />Up to 4 interchangeable liquid or vapor <br />sensors. <br />Key lock hinged cover. <br />-)roof enclosure available. <br />Weatheq <br />a Miniature vapor or liquid sensors are avail- <br />able for use between the walls of small tanks. <br />• <br />INSTRUMENTS <br />