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e a .,� t v, k`°*sv <br />Monitoring <br />y': <br />Tank <br />Reservoir Probe <br />variety of The accurate monitoring of the primary and secondary tank <br />e eco- walls is accomplished through the use of an electronic sensor <br />,ak in and the tank -mounted hydrostatic reservoir. <br />ittached <br />:lock mon- <br />-control <br />a four - <br />(An eight- <br />oring the With the interstitial space and reservoir factory -filled with <br />liquid to a predetermined level, a hydrostatic pressure is <br />applied to the inner and outer tank walls. <br />If a leak should ever occur in the inner tank, the liquid level in <br />the reservoir will drop as monitoring fluid drains into the pri- <br />mary tank. Should a leak develop in the outer wall, the moni- <br />toring fluid will drain into the excavation and again lower the <br />show the level of monitoring fluid. Should a leak occur in the outer wall <br />�r in the during high -groundwater conditions, the level of the monitor - <br />)le alarm ing fluid will rise as outside water seeps into the interstitial <br />space. In any of these situations, a change in the liquid level <br />beyond the acceptable limits will activate the alarm. <br />prove the <br />!stant. <br />Power (green) - The system is operating properly. <br />Fault Ivellowl - The system has an internal malfunction. <br />