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Continuous Leak Detection Changing regulations in some markets require that double-wall Primary-Tank Leak tanks have continuous leak detection using a constant vacuum, in Wet Hole or Dry Hole air pressure or hydrostatic pressure in the interstice of a double- vent wall tank. For many reasons, a Xerxes double-wall tank with t_Reservoir TRUCHEK's continuous leak detection is the ideal solution Level Down for complying with these strict new requirements.Vacuum and ^' air-pressure systems have had very limited use in continuously monitoring jacketed tanks.In fact,some systems are brand new to the market. On the other hand,TRUCHEK has an excellent track record of successfully monitoring thousands of Xerxes double-wall tanks for well over a decade.While being highly effective, the TRUCHEK system is also simple and trouble-free in both design and operation.TRUCHEK's operation does not require the difficult process of maintaining a constant vacuum or pres- Secondary-Tank Leak sure in a tank's interstice,or the special equipment necessary to in Dry Hole do that. Additionally,TRUCHEK avoids the problem caused vent by false tank-leak alarms that can occur when all fittings and Rese volr connections to an air or vacuum monitoring system aren't Level Down absolutely tight. With TRUCHEK, simple monitoring of the fluid level inside the reservoir of a Xerxes double-wall tank is all that is necessary. Here's how TRUCHEK works (see drawings to right): When n you order a Xerxes double-wall tank with the TRUCHEK - option,the interstice between the two tank walls is filled at the factory with a monitoring fluid. The monitoring fluid also partially fills a reservoir on the top of the tank.This creates a hydrostatic pressure that enables the operator to monitor the Secondary-Tank Leak walls of both the primary tank and the secondary tank. An electronic reservoir-monitoring probe alarms when the fluid i n Wet Hole level either falls below or rises above the acceptable level within .Vent Reservoir the reservoir. Level Up Primary-Tank Leak: '""�" " Leak in Because the specific gravity of the monitoring fluid is greater than that of the petroleum product stored, a breach in the primary tank causes the monitoring fluid to go into the inner tank in both a dry hole and a wet hole. Secondary-Tank Leak: The level of the monitoring fluid fluctuates if the pressure inside the interstice is either greater than or less than the pres- Features and Benefits sure of the surrounding water table. ■ Provides continuous monitoring of both primary In a dry hole,a breach in the secondary tank causes the moni- and secondary tanks toring fluid to go into the backfill surrounding the tank. ■ Provides effective monitoring in both dry-hole and wet-hole environments In a wet hole, the monitoring fluid in the reservoir goes up if n Meets Californias strict new regulations for a breach in the secondary tank occurs where the height of the continuous monitoring of tanks water table above the leak is 30 percent greater than the level of the monitoring fluid above the breach.In a wet hole,where the ■ Is compatible with most electronic monitoring systems height of the water table above the leak is less than 30 percent, ■ Has been proven highly effective over thousands of the monitoring fluid goes into the groundwater. tank installations